leveleditor.py

"""Copyright (c) 2010-2012 David Rio Vierra

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE."""
import sys
from editortools.thumbview import ThumbView
from pymclevel.infiniteworld import SessionLockLost

"""
leveleditor.py

Viewport objects for Camera and Chunk views, which respond to some keyboard and
mouse input. LevelEditor object responds to some other keyboard and mouse
input, plus handles the undo stack and implements tile entity editors for
chests, signs, and more. Toolbar object which holds instances of EditorTool
imported from editortools/

"""

import gc
import os
import math
import csv
import copy
import time
import numpy
import config
import frustum
import logging
import glutils
import release
import mceutils
import platform
import functools
import editortools
import itertools
import mcplatform
import pymclevel
import renderer

from math import isnan
from os.path import dirname, isdir
from datetime import datetime, timedelta
from collections import defaultdict, deque

from OpenGL import GL
from OpenGL import GLU

from albow import alert, ask, AttrRef, Button, Column, get_font, Grid, input_text, IntField, Menu, root, Row, TableColumn, TableView, TextField, TimeField, Widget, CheckBox
from albow.controls import Label, SmallValueDisplay, ValueDisplay
from albow.dialogs import Dialog, QuickDialog, wrapped_label
from albow.openglwidgets import GLOrtho, GLViewport
from pygame import display, event, key, KMOD_ALT, KMOD_CTRL, KMOD_LALT, KMOD_META, KMOD_RALT, KMOD_SHIFT, mouse, MOUSEMOTION

from depths import DepthOffset
from editortools.operation import Operation
from editortools.chunk import GeneratorPanel
from glbackground import GLBackground, Panel
from glutils import gl, Texture
from mcplatform import askSaveFile
from pymclevel.minecraft_server import alphanum_key #?????
from renderer import MCRenderer

# Label = GLLabel

Settings = config.Settings("Settings")
Settings.flyMode = Settings("Fly Mode", False)
Settings.enableMouseLag = Settings("Enable Mouse Lag", False)
Settings.longDistanceMode = Settings("Long Distance Mode", False)
Settings.shouldResizeAlert = Settings("Window Size Alert", True)
Settings.closeMinecraftWarning = Settings("Close Minecraft Warning", True)
Settings.skin = Settings("MCEdit Skin", "[Current]")
Settings.fov = Settings("Field of View", 70.0)
Settings.spaceHeight = Settings("Space Height", 64)
Settings.blockBuffer = Settings("Block Buffer", 256 * 1048576)
Settings.reportCrashes = Settings("report crashes new", False)
Settings.reportCrashesAsked = Settings("report crashes asked", False)

Settings.viewDistance = Settings("View Distance", 8)
Settings.targetFPS = Settings("Target FPS", 30)

Settings.windowWidth = Settings("window width", 1024)
Settings.windowHeight = Settings("window height", 768)
Settings.windowX = Settings("window x", 0)
Settings.windowY = Settings("window y", 0)
Settings.windowShowCmd = Settings("window showcmd", 1)
Settings.setWindowPlacement = Settings("SetWindowPlacement", True)

Settings.showHiddenOres = Settings("show hidden ores", False)
Settings.fastLeaves = Settings("fast leaves", True)
Settings.roughGraphics = Settings("rough graphics", False)
Settings.showChunkRedraw = Settings("show chunk redraw", True)
Settings.drawSky = Settings("draw sky", True)
Settings.drawFog = Settings("draw fog", True)
Settings.showCeiling = Settings("show ceiling", True)
Settings.drawEntities = Settings("draw entities", True)
Settings.drawMonsters = Settings("draw monsters", True)
Settings.drawItems = Settings("draw items", True)
Settings.drawTileEntities = Settings("draw tile entities", True)
Settings.drawTileTicks = Settings("draw tile ticks", False)
Settings.drawUnpopulatedChunks = Settings("draw unpopulated chunks", True)
Settings.vertexBufferLimit = Settings("vertex buffer limit", 384)

Settings.vsync = Settings("vertical sync", 0)
Settings.visibilityCheck = Settings("visibility check", False)
Settings.viewMode = Settings("View Mode", "Camera")

Settings.undoLimit = Settings("Undo Limit", 20)

ControlSettings = config.Settings("Controls")
ControlSettings.mouseSpeed = ControlSettings("mouse speed", 5.0)
ControlSettings.cameraAccel = ControlSettings("camera acceleration", 125.0)
ControlSettings.cameraDrag = ControlSettings("camera drag", 100.0)
ControlSettings.cameraMaxSpeed = ControlSettings("camera maximum speed", 60.0)
ControlSettings.cameraBrakingSpeed = ControlSettings("camera braking speed", 8.0)
ControlSettings.invertMousePitch = ControlSettings("invert mouse pitch", False)
ControlSettings.autobrake = ControlSettings("autobrake", True)
ControlSettings.swapAxes = ControlSettings("swap axes looking down", False)

arch = platform.architecture()[0]


def remapMouseButton(button):
    buttons = [0, 1, 3, 2, 4, 5]  # mouse2 is right button, mouse3 is middle
    if button < len(buttons):
        return buttons[button]
    return button


class ControlPanel(Panel):
    @classmethod
    def getHeader(cls):
        header = Label("MCEdit {0} ({1})".format(release.release, arch), font=get_font(18, "VeraBd.ttf"))
        return header

    def __init__(self, editor):
        Panel.__init__(self)
        self.editor = editor

        self.bg_color = (0, 0, 0, 0.8)

        header = self.getHeader()
        keysColumn = [Label("")]
        buttonsColumn = [header]

        cmd = mcplatform.cmd_name
        hotkeys = ([(cmd + "-N", "Create New World", editor.mcedit.createNewWorld),
                    (cmd + "-O", "Open World...", editor.askOpenFile),
                    (cmd + "-L", "Load World...", editor.askLoadWorld),
                    (cmd + "-S", "Save", editor.saveFile),
                    (cmd + "-R", "Reload", editor.reload),
                    (cmd + "-W", "Close", editor.closeEditor),
                    ("", "", lambda: None),

                    (cmd + "G", "Goto", editor.showGotoPanel),
                    (cmd + "-I", "World Info", editor.showWorldInfo),
                    (cmd + "-Z", "Undo", editor.undo),
                    (cmd + "-A", "Select All", editor.selectAll),
                    (cmd + "-D", "Deselect", editor.deselect),
                    (cmd + "-F", AttrRef(editor, 'viewDistanceLabelText'), editor.swapViewDistance),
                    ("Alt-F4", "Quit", editor.quit),
                    ])

        if cmd == "Cmd":
            hotkeys[-1] = ("Cmd-Q", hotkeys[-1][1], hotkeys[-1][2])

        buttons = mceutils.HotkeyColumn(hotkeys, keysColumn, buttonsColumn)

        sideColumn = editor.mcedit.makeSideColumn()

        self.add(Row([buttons, sideColumn]))
        self.shrink_wrap()

    def key_down(self, evt):
        if key.name(evt.key) == 'escape':
            self.dismiss()
        else:
            self.editor.key_down(evt)

    def mouse_down(self, e):
        if e not in self:
            self.dismiss()


def unproject(x, y, z):
    try:
        return GLU.gluUnProject(x, y, z)
    except ValueError:  # projection failed
        return 0, 0, 0


def DebugDisplay(obj, *attrs):
    col = []
    for attr in attrs:
        def _get(attr):
            return lambda: str(getattr(obj, attr))

        col.append(Row((Label(attr + " = "), ValueDisplay(width=600, get_value=_get(attr)))))

    col = Column(col, align="l")
    b = GLBackground()
    b.add(col)
    b.shrink_wrap()
    return b


class CameraViewport(GLViewport):
    anchor = "tlbr"

    oldMousePosition = None

    def __init__(self, editor):
        self.editor = editor
        rect = editor.mcedit.rect
        GLViewport.__init__(self, rect)

        near = 0.5
        far = 4000.0

        self.near = near
        self.far = far

        self.brake = False
        self.lastTick = datetime.now()
        # self.nearheight = near * tang

        self.cameraPosition = (16., 45., 16.)
        self.velocity = [0., 0., 0.]

        self.yaw = -45.  # degrees
        self._pitch = 0.1

        self.cameraVector = self._cameraVector()

        # A state machine to dodge an apparent bug in pygame that generates erroneous mouse move events
        #   0 = bad event already happened
        #   1 = app just started or regained focus since last bad event
        #   2 = mouse cursor was hidden after state 1, next event will be bad
        self.avoidMouseJumpBug = 1

        Settings.drawSky.addObserver(self)
        Settings.drawFog.addObserver(self)
        Settings.showCeiling.addObserver(self)
        ControlSettings.cameraAccel.addObserver(self, "accelFactor")
        ControlSettings.cameraMaxSpeed.addObserver(self, "maxSpeed")
        ControlSettings.cameraBrakingSpeed.addObserver(self, "brakeMaxSpeed")
        ControlSettings.invertMousePitch.addObserver(self)
        ControlSettings.autobrake.addObserver(self)
        ControlSettings.swapAxes.addObserver(self)

        Settings.visibilityCheck.addObserver(self)
        Settings.fov.addObserver(self, "fovSetting", callback=self.updateFov)

        self.mouseVector = (0, 0, 0)
        # self.add(DebugDisplay(self, "cameraPosition", "blockFaceUnderCursor", "mouseVector", "mouse3dPoint"))

    @property
    def pitch(self):
        return self._pitch

    @pitch.setter
    def pitch(self, val):
        self._pitch = min(89.999, max(-89.999, val))

    def updateFov(self, val=None):
        hfov = self.fovSetting
        fov = numpy.degrees(2.0 * numpy.arctan(self.size[0] / self.size[1] * numpy.tan(numpy.radians(hfov) * 0.5)))

        self.fov = fov
        self.tang = numpy.tan(numpy.radians(fov))

    def stopMoving(self):
        self.velocity = [0, 0, 0]

    def brakeOn(self):
        self.brake = True

    def brakeOff(self):
        self.brake = False

    tickInterval = 1000 / 30

    oldPosition = (0, 0, 0)

    flyMode = Settings.flyMode.configProperty()

    def tickCamera(self, frameStartTime, inputs, inSpace):
        if (frameStartTime - self.lastTick).microseconds > self.tickInterval * 1000:
            timeDelta = frameStartTime - self.lastTick
            self.lastTick = frameStartTime
        else:
            return

        timeDelta = float(timeDelta.microseconds) / 1000000.
        timeDelta = min(timeDelta, 0.125)  # 8fps lower limit!
        drag = ControlSettings.cameraDrag.get()
        accel_factor = drag + ControlSettings.cameraAccel.get()

        # if we're in space, move faster

        drag_epsilon = 10.0 * timeDelta
        max_speed = self.maxSpeed

        if self.brake:
            max_speed = self.brakeMaxSpeed

        if inSpace:
            accel_factor *= 3.0
            max_speed *= 3.0

        pi = self.editor.cameraPanKeys
        mouseSpeed = ControlSettings.mouseSpeed.get()
        self.yaw += pi[0] * mouseSpeed
        self.pitch += pi[1] * mouseSpeed

        alignMovementToAxes = key.get_mods() & KMOD_SHIFT

        if self.flyMode:
            (dx, dy, dz) = self._anglesToVector(self.yaw, 0)
        elif self.swapAxesLookingDown or alignMovementToAxes:
            p = self.pitch
            if p > 80 or alignMovementToAxes:
                p = 0

            (dx, dy, dz) = self._anglesToVector(self.yaw, p)

        else:
            (dx, dy, dz) = self._cameraVector()

        velocity = self.velocity  # xxx learn to use matrix/vector libs
        i = inputs
        yaw = numpy.radians(self.yaw)
        cosyaw = -numpy.cos(yaw)
        sinyaw = numpy.sin(yaw)
        if alignMovementToAxes:
            cosyaw = int(cosyaw * 1.4)
            sinyaw = int(sinyaw * 1.4)
            dx = int(dx * 1.4)
            dy = int(dy * 1.6)
            dz = int(dz * 1.4)

        directedInputs = mceutils.normalize((
            i[0] * cosyaw + i[2] * dx,
            i[1] + i[2] * dy,
            i[2] * dz - i[0] * sinyaw,
        ))

        # give the camera an impulse according to the state of the inputs and in the direction of the camera
        cameraAccel = map(lambda x: x * accel_factor * timeDelta, directedInputs)
        # cameraImpulse = map(lambda x: x*impulse_factor, directedInputs)

        newVelocity = map(lambda a, b: a + b, velocity, cameraAccel)
        velocityDir, speed = mceutils.normalize_size(newVelocity)

        # apply drag
        if speed:
            if self.autobrake and not any(inputs):
                speed = 0.15 * speed
            else:

                sign = speed / abs(speed)
                speed = abs(speed)
                speed = speed - (drag * timeDelta)
                if speed < 0.0:
                    speed = 0.0
                speed *= sign

        speed = max(-max_speed, min(max_speed, speed))

        if abs(speed) < drag_epsilon:
            speed = 0

        velocity = map(lambda a: a * speed, velocityDir)

        # velocity = map(lambda p,d: p + d, velocity, cameraImpulse)
        d = map(lambda a, b: abs(a - b), self.cameraPosition, self.oldPosition)
        if d[0] + d[2] > 32.0:
            self.oldPosition = self.cameraPosition
            self.updateFloorQuad()

        self.cameraPosition = map(lambda p, d: p + d * timeDelta, self.cameraPosition, velocity)
        if self.cameraPosition[1] > 3800.:
            self.cameraPosition[1] = 3800.
        if self.cameraPosition[1] < -1000.:
            self.cameraPosition[1] = -1000.

        self.velocity = velocity
        self.cameraVector = self._cameraVector()

        self.editor.renderer.position = self.cameraPosition
        if self.editor.currentTool.previewRenderer:
            self.editor.currentTool.previewRenderer.position = self.cameraPosition

    def setModelview(self):
        pos = self.cameraPosition
        look = numpy.array(self.cameraPosition)
        look += self.cameraVector
        up = (0, 1, 0)
        GLU.gluLookAt(pos[0], pos[1], pos[2],
                  look[0], look[1], look[2],
                  up[0], up[1], up[2])

    def _cameraVector(self):
        return self._anglesToVector(self.yaw, self.pitch)

    def _anglesToVector(self, yaw, pitch):
        def nanzero(x):
            if isnan(x):
                return 0
            else:
                return x

        dx = -math.sin(math.radians(yaw)) * math.cos(math.radians(pitch))
        dy = -math.sin(math.radians(pitch))
        dz = math.cos(math.radians(yaw)) * math.cos(math.radians(pitch))
        return map(nanzero, [dx, dy, dz])

    def updateMouseVector(self):
        self.mouseVector = self._mouseVector()

    def _mouseVector(self):
        """
            returns a vector reflecting a ray cast from the camera
        position to the mouse position on the near plane
        """
        x, y = mouse.get_pos()
        # if (x, y) not in self.rect:
        #    return (0, 0, 0);  # xxx

        y = self.get_root().height - y
        point1 = unproject(x, y, 0.0)
        point2 = unproject(x, y, 1.0)
        v = numpy.array(point2) - point1
        v = mceutils.normalize(v)
        return v

    def _blockUnderCursor(self, center=False):
        """
            returns a point in 3d space that was determined by
         reading the depth buffer value
        """
        try:
            GL.glReadBuffer(GL.GL_BACK)
        except Exception:
            logging.exception('Exception during glReadBuffer')
        ws = self.get_root().size
        if center:
            x, y = ws
            x //= 2
            y //= 2
        else:
            x, y = mouse.get_pos()
        if (x < 0 or y < 0 or x >= ws[0] or
            y >= ws[1]):
                return 0, 0, 0

        y = ws[1] - y

        try:
            pixel = GL.glReadPixels(x, y, 1, 1, GL.GL_DEPTH_COMPONENT, GL.GL_FLOAT)
            newpoint = unproject(x, y, pixel[0])
        except Exception:
            return 0, 0, 0

        return newpoint

    def updateBlockFaceUnderCursor(self):
        focusPair = None
        if not self.enableMouseLag or self.editor.frames & 1:
            self.updateMouseVector()
            if self.editor.mouseEntered:
                if not self.mouseMovesCamera:
                    mouse3dPoint = self._blockUnderCursor()
                    focusPair = self.findBlockFaceUnderCursor(mouse3dPoint)
                elif self.editor.longDistanceMode:
                    mouse3dPoint = self._blockUnderCursor(True)
                    focusPair = self.findBlockFaceUnderCursor(mouse3dPoint)

            # otherwise, find the block at a controllable distance in front of the camera
            if focusPair is None:
                focusPair = (self.getCameraPoint(), (0, 0, 0))

            self.blockFaceUnderCursor = focusPair

    def findBlockFaceUnderCursor(self, projectedPoint):
        """Returns a (pos, Face) pair or None if one couldn't be found"""

        d = [0, 0, 0]

        try:
            intProjectedPoint = map(int, map(numpy.floor, projectedPoint))
        except ValueError:
            return None  # catch NaNs
        intProjectedPoint[1] = max(0, intProjectedPoint[1])

        # find out which face is under the cursor.  xxx do it more precisely
        faceVector = ((projectedPoint[0] - (intProjectedPoint[0] + 0.5)),
             (projectedPoint[1] - (intProjectedPoint[1] + 0.5)),
             (projectedPoint[2] - (intProjectedPoint[2] + 0.5))
             )

        av = map(abs, faceVector)

        i = av.index(max(av))
        delta = faceVector[i]
        if delta < 0:
            d[i] = -1
        else:
            d[i] = 1

        potentialOffsets = []

        try:
            block = self.editor.level.blockAt(*intProjectedPoint)
        except (EnvironmentError, pymclevel.ChunkNotPresent):
            return intProjectedPoint, d

        if block == pymclevel.alphaMaterials.SnowLayer.ID:
            potentialOffsets.append((0, 1, 0))
        else:
            # discard any faces that aren't likely to be exposed
            for face, offsets in pymclevel.faceDirections:
                point = map(lambda a, b: a + b, intProjectedPoint, offsets)
                try:
                    neighborBlock = self.editor.level.blockAt(*point)
                    if block != neighborBlock:
                        potentialOffsets.append(offsets)
                except (EnvironmentError, pymclevel.ChunkNotPresent):
                    pass

        # check each component of the face vector to see if that face is exposed
        if tuple(d) not in potentialOffsets:
            av[i] = 0
            i = av.index(max(av))
            d = [0, 0, 0]
            delta = faceVector[i]
            if delta < 0:
                d[i] = -1
            else:
                d[i] = 1
            if tuple(d) not in potentialOffsets:
                av[i] = 0
                i = av.index(max(av))
                d = [0, 0, 0]
                delta = faceVector[i]
                if delta < 0:
                    d[i] = -1
                else:
                    d[i] = 1

                if tuple(d) not in potentialOffsets:
                    if len(potentialOffsets):
                        d = potentialOffsets[0]
                    else:
                        # use the top face as a fallback
                        d = [0, 1, 0]

        return intProjectedPoint, d

    @property
    def ratio(self):
        return self.width / float(self.height)

    startingMousePosition = None

    def mouseLookOn(self):
        root.get_root().capture_mouse(self)
        self.focus_switch = None
        self.startingMousePosition = mouse.get_pos()

        if self.avoidMouseJumpBug == 1:
            self.avoidMouseJumpBug = 2

    def mouseLookOff(self):
        root.get_root().capture_mouse(None)
        if self.startingMousePosition:
            mouse.set_pos(*self.startingMousePosition)
        self.startingMousePosition = None

    @property
    def mouseMovesCamera(self):
        return root.get_root().captured_widget is not None

    def toggleMouseLook(self):
        if not self.mouseMovesCamera:
            self.mouseLookOn()
        else:
            self.mouseLookOff()

    mobs = pymclevel.Entity.monsters + ["[Custom]"]

    @mceutils.alertException
    def editMonsterSpawner(self, point):
        mobs = self.mobs

        tileEntity = self.editor.level.tileEntityAt(*point)
        if not tileEntity:
            tileEntity = pymclevel.TAG_Compound()
            tileEntity["id"] = pymclevel.TAG_String("MobSpawner")
            tileEntity["x"] = pymclevel.TAG_Int(point[0])
            tileEntity["y"] = pymclevel.TAG_Int(point[1])
            tileEntity["z"] = pymclevel.TAG_Int(point[2])
            tileEntity["Delay"] = pymclevel.TAG_Short(120)
            tileEntity["EntityId"] = pymclevel.TAG_String(mobs[0])

        self.editor.level.addTileEntity(tileEntity)
        self.editor.addUnsavedEdit()

        panel = Dialog()

        def addMob(id):
            if id not in mobs:
                mobs.insert(0, id)
                mobTable.selectedIndex = 0

        def selectTableRow(i, evt):
            if mobs[i] == "[Custom]":
                id = input_text("Type in an EntityID for this spawner. Invalid IDs may crash Minecraft.", 150)
                if id:
                    addMob(id)
                else:
                    return
                mobTable.selectedIndex = mobs.index(id)
            else:
                mobTable.selectedIndex = i

            if evt.num_clicks == 2:
                panel.dismiss()

        mobTable = TableView(columns=(
            TableColumn("", 200),
            )
        )
        mobTable.num_rows = lambda: len(mobs)
        mobTable.row_data = lambda i: (mobs[i],)
        mobTable.row_is_selected = lambda x: x == mobTable.selectedIndex
        mobTable.click_row = selectTableRow
        mobTable.selectedIndex = 0

        def selectedMob():
            return mobs[mobTable.selectedIndex]

        id = tileEntity["EntityId"].value
        addMob(id)

        mobTable.selectedIndex = mobs.index(id)

        choiceCol = Column((ValueDisplay(width=200, get_value=lambda: selectedMob() + " spawner"), mobTable))

        okButton = Button("OK", action=panel.dismiss)
        panel.add(Column((choiceCol, okButton)))
        panel.shrink_wrap()
        panel.present()

        tileEntity["EntityId"] = pymclevel.TAG_String(selectedMob())

    @mceutils.alertException
    def editSign(self, point):

        block = self.editor.level.blockAt(*point)
        tileEntity = self.editor.level.tileEntityAt(*point)

        linekeys = ["Text" + str(i) for i in range(1, 5)]

        if not tileEntity:
            tileEntity = pymclevel.TAG_Compound()
            tileEntity["id"] = pymclevel.TAG_String("Sign")
            tileEntity["x"] = pymclevel.TAG_Int(point[0])
            tileEntity["y"] = pymclevel.TAG_Int(point[1])
            tileEntity["z"] = pymclevel.TAG_Int(point[2])
            for l in linekeys:
                tileEntity[l] = pymclevel.TAG_String("")

        self.editor.level.addTileEntity(tileEntity)

        panel = Dialog()

        lineFields = [TextField(width=150) for l in linekeys]
        for l, f in zip(linekeys, lineFields):
            f.value = tileEntity[l].value

        colors = [
            "Black",
            "Blue",
            "Green",
            "Cyan",
            "Red",
            "Purple",
            "Yellow",
            "Light Gray",
            "Dark Gray",
            "Light Blue",
            "Bright Green",
            "Bright Blue",
            "Bright Red",
            "Bright Purple",
            "Bright Yellow",
            "White",
        ]

        def menu_picked(index):
            c = u'\xa7' + hex(index)[-1]
            currentField = panel.focus_switch.focus_switch
            currentField.text += c  # xxx view hierarchy
            currentField.insertion_point = len(currentField.text)

        colorMenu = mceutils.MenuButton("Color Code...", colors, menu_picked=menu_picked)

        column = [Label("Edit Sign")] + lineFields + [colorMenu, Button("OK", action=panel.dismiss)]

        panel.add(Column(column))
        panel.shrink_wrap()
        if panel.present():

            self.editor.addUnsavedEdit()
            for l, f in zip(linekeys, lineFields):
                tileEntity[l].value = f.value[:15]

    @mceutils.alertException
    def editContainer(self, point, containerID):
        tileEntityTag = self.editor.level.tileEntityAt(*point)
        if tileEntityTag is None:
            tileEntityTag = pymclevel.TileEntity.Create(containerID)
            pymclevel.TileEntity.setpos(tileEntityTag, point)
            self.editor.level.addTileEntity(tileEntityTag)

        if tileEntityTag["id"].value != containerID:
            return

        backupEntityTag = copy.deepcopy(tileEntityTag)

        def itemProp(key):
            # xxx do validation here
            def getter(self):
                if 0 == len(tileEntityTag["Items"]):
                    return "N/A"
                return tileEntityTag["Items"][self.selectedItemIndex][key].value

            def setter(self, val):
                if 0 == len(tileEntityTag["Items"]):
                    return
                self.dirty = True
                tileEntityTag["Items"][self.selectedItemIndex][key].value = val
            return property(getter, setter)

        class ChestWidget(Widget):
            dirty = False
            Slot = itemProp("Slot")
            id = itemProp("id")
            Damage = itemProp("Damage")
            Count = itemProp("Count")
            itemLimit = pymclevel.TileEntity.maxItems.get(containerID, 255)

        def slotFormat(slot):
            slotNames = pymclevel.TileEntity.slotNames.get(containerID)
            if slotNames:
                return slotNames.get(slot, slot)
            return slot

        chestWidget = ChestWidget()
        chestItemTable = TableView(columns=[
            TableColumn("Slot", 80, "l", fmt=slotFormat),
            TableColumn("ID", 50, "l"),
            TableColumn("DMG", 50, "l"),
            TableColumn("Count", 65, "l"),

            TableColumn("Name", 200, "l"),
        ])

        def itemName(id, damage):
            try:
                return pymclevel.items.items.findItem(id, damage).name
            except pymclevel.items.ItemNotFound:
                return "Unknown Item"

        def getRowData(i):
            item = tileEntityTag["Items"][i]
            slot, id, damage, count = item["Slot"].value, item["id"].value, item["Damage"].value, item["Count"].value
            return slot, id, damage, count, itemName(id, damage)

        chestWidget.selectedItemIndex = 0

        def selectTableRow(i, evt):
            chestWidget.selectedItemIndex = i

        chestItemTable.num_rows = lambda: len(tileEntityTag["Items"])
        chestItemTable.row_data = getRowData
        chestItemTable.row_is_selected = lambda x: x == chestWidget.selectedItemIndex
        chestItemTable.click_row = selectTableRow

        fieldRow = (
            # mceutils.IntInputRow("Slot: ", ref=AttrRef(chestWidget, 'Slot'), min= -128, max=127),
            mceutils.IntInputRow("ID: ", ref=AttrRef(chestWidget, 'id'), min=0, max=32767),
            mceutils.IntInputRow("DMG: ", ref=AttrRef(chestWidget, 'Damage'), min=-32768, max=32767),
            mceutils.IntInputRow("Count: ", ref=AttrRef(chestWidget, 'Count'), min=-128, max=127),
        )

        def deleteFromWorld():
            i = chestWidget.selectedItemIndex
            item = tileEntityTag["Items"][i]
            id = item["id"].value
            Damage = item["Damage"].value

            deleteSameDamage = mceutils.CheckBoxLabel("Only delete items with the same damage value")
            deleteBlocksToo = mceutils.CheckBoxLabel("Also delete blocks placed in the world")
            if id not in (8, 9, 10, 11):  # fluid blocks
                deleteBlocksToo.value = True

            w = wrapped_label("WARNING: You are about to modify the entire world. This cannot be undone. Really delete all copies of this item from all land, chests, furnaces, dispensers, dropped items, item-containing tiles, and player inventories in this world?", 60)
            col = (w, deleteSameDamage)
            if id < 256:
                col += (deleteBlocksToo,)

            d = Dialog(Column(col), ["OK", "Cancel"])

            if d.present() == "OK":
                def deleteItemsIter():
                    i = 0
                    if deleteSameDamage.value:
                        def matches(t):
                            return t["id"].value == id and t["Damage"].value == Damage
                    else:
                        def matches(t):
                            return t["id"].value == id

                    def matches_itementity(e):
                        if e["id"].value != "Item":
                            return False
                        if "Item" not in e:
                            return False
                        t = e["Item"]
                        return matches(t)
                    for player in self.editor.level.players:
                        tag = self.editor.level.getPlayerTag(player)
                        l = len(tag["Inventory"])
                        tag["Inventory"].value = [t for t in tag["Inventory"].value if not matches(t)]

                    for chunk in self.editor.level.getChunks():
                        if id < 256 and deleteBlocksToo.value:
                            matchingBlocks = chunk.Blocks == id
                            if deleteSameDamage.value:
                                matchingBlocks &= chunk.Data == Damage
                            if any(matchingBlocks):
                                chunk.Blocks[matchingBlocks] = 0
                                chunk.Data[matchingBlocks] = 0
                                chunk.chunkChanged()
                                self.editor.invalidateChunks([chunk.chunkPosition])

                        for te in chunk.TileEntities:
                            if "Items" in te:
                                l = len(te["Items"])

                                te["Items"].value = [t for t in te["Items"].value if not matches(t)]
                                if l != len(te["Items"]):
                                    chunk.dirty = True
                        entities = [e for e in chunk.Entities if matches_itementity(e)]
                        if len(entities) != len(chunk.Entities):
                            chunk.Entities.value = entities
                            chunk.dirty = True

                        yield (i, self.editor.level.chunkCount)
                        i += 1

                progressInfo = "Deleting the item {0} from the entire world ({1} chunks)".format(itemName(chestWidget.id, 0), self.editor.level.chunkCount)

                mceutils.showProgress(progressInfo, deleteItemsIter(), cancel=True)

                self.editor.addUnsavedEdit()
                chestWidget.selectedItemIndex = min(chestWidget.selectedItemIndex, len(tileEntityTag["Items"]) - 1)

        def deleteItem():
            i = chestWidget.selectedItemIndex
            item = tileEntityTag["Items"][i]
            tileEntityTag["Items"].value = [t for t in tileEntityTag["Items"].value if t is not item]
            chestWidget.selectedItemIndex = min(chestWidget.selectedItemIndex, len(tileEntityTag["Items"]) - 1)

        def deleteEnable():
            return len(tileEntityTag["Items"]) and chestWidget.selectedItemIndex != -1

        def addEnable():
            return len(tileEntityTag["Items"]) < chestWidget.itemLimit

        def addItem():
            slot = 0
            for item in tileEntityTag["Items"]:
                if slot == item["Slot"].value:
                    slot += 1
            if slot >= chestWidget.itemLimit:
                return
            item = pymclevel.TAG_Compound()
            item["id"] = pymclevel.TAG_Short(0)
            item["Damage"] = pymclevel.TAG_Short(0)
            item["Slot"] = pymclevel.TAG_Byte(slot)
            item["Count"] = pymclevel.TAG_Byte(0)
            tileEntityTag["Items"].append(item)

        addItemButton = Button("Add Item", action=addItem, enable=addEnable)
        deleteItemButton = Button("Delete This Item", action=deleteItem, enable=deleteEnable)
        deleteFromWorldButton = Button("Delete Item ID From Entire World", action=deleteFromWorld, enable=deleteEnable)
        deleteCol = Column((addItemButton, deleteItemButton, deleteFromWorldButton), align="l")

        fieldRow = Row(fieldRow)
        col = Column((chestItemTable, fieldRow, deleteCol))

        chestWidget.add(col)
        chestWidget.shrink_wrap()

        Dialog(client=chestWidget, responses=["Done"]).present()
        level = self.editor.level

        class ChestEditOperation(Operation):
            def perform(self, recordUndo=True):
                level.addTileEntity(tileEntityTag)

            def undo(self):
                level.addTileEntity(backupEntityTag)
                return pymclevel.BoundingBox(pymclevel.TileEntity.pos(tileEntityTag), (1, 1, 1))

        if chestWidget.dirty:
            op = ChestEditOperation(self.editor, self.editor.level)
            op.perform()
            self.editor.addOperation(op)
            self.editor.addUnsavedEdit()

    rightMouseDragStart = None

    def rightClickDown(self, evt):

        self.rightMouseDragStart = datetime.now()
        self.toggleMouseLook()

    def rightClickUp(self, evt):
        x, y = evt.pos
        if self.rightMouseDragStart is None:
            return

        td = datetime.now() - self.rightMouseDragStart
        # except AttributeError:
        #    return
        # print "RightClickUp: ", td
        if td.seconds > 0 or td.microseconds > 280000:
            self.mouseLookOff()

    def leftClickDown(self, evt):
        self.editor.toolMouseDown(evt, self.blockFaceUnderCursor)

        if evt.num_clicks == 2:
            def distance2(p1, p2):
                return numpy.sum(map(lambda a, b: (a - b) ** 2, p1, p2))

            point, face = self.blockFaceUnderCursor
            if point is not None:
                point = map(lambda x: int(numpy.floor(x)), point)
                if self.editor.currentTool is self.editor.selectionTool:
                    try:
                        block = self.editor.level.blockAt(*point)
                        if distance2(point, self.cameraPosition) > 4:
                            blockEditors = {
                                pymclevel.alphaMaterials.MonsterSpawner.ID:   self.editMonsterSpawner,
                                pymclevel.alphaMaterials.Sign.ID:             self.editSign,
                                pymclevel.alphaMaterials.WallSign.ID:         self.editSign,
                            }
                            edit = blockEditors.get(block)
                            if edit:
                                self.editor.endSelection()
                                edit(point)
                            else:
                                # detect "container" tiles
                                te = self.editor.level.tileEntityAt(*point)
                                if te and "Items" in te and "id" in te:
                                    self.editor.endSelection()
                                    self.editContainer(point, te["id"].value)
                    except (EnvironmentError, pymclevel.ChunkNotPresent):
                        pass

    def leftClickUp(self, evt):
        self.editor.toolMouseUp(evt, self.blockFaceUnderCursor)

    # --- Event handlers ---

    def mouse_down(self, evt):
        button = remapMouseButton(evt.button)
        logging.debug("Mouse down %d @ %s", button, evt.pos)

        if button == 1:
            if sys.platform == "darwin" and evt.ctrl:
                self.rightClickDown(evt)
            else:
                self.leftClickDown(evt)
        elif button == 2:
            self.rightClickDown(evt)
        else:
            evt.dict['keyname'] = "mouse{0}".format(button)
            self.editor.key_down(evt)

        self.editor.focus_on(None)
        # self.focus_switch = None

    def mouse_up(self, evt):
        button = remapMouseButton(evt.button)
        logging.debug("Mouse up   %d @ %s", button, evt.pos)
        if button == 1:
            if sys.platform == "darwin" and evt.ctrl:
                self.rightClickUp(evt)
            else:
                self.leftClickUp(evt)
        elif button == 2:
            self.rightClickUp(evt)
        else:
            evt.dict['keyname'] = "mouse{0}".format(button)
            self.editor.key_up(evt)

    def mouse_drag(self, evt):
        self.mouse_move(evt)
        self.editor.mouse_drag(evt)

    lastRendererUpdate = datetime.now()

    def mouse_move(self, evt):
        if self.avoidMouseJumpBug == 2:
            self.avoidMouseJumpBug = 0
            return

        def sensitivityAdjust(d):
            return d * ControlSettings.mouseSpeed.get() / 10.0

        self.editor.mouseEntered = True
        if self.mouseMovesCamera:

            pitchAdjust = sensitivityAdjust(evt.rel[1])
            if self.invertMousePitch:
                pitchAdjust = -pitchAdjust
            self.yaw += sensitivityAdjust(evt.rel[0])
            self.pitch += pitchAdjust
            if datetime.now() - self.lastRendererUpdate > timedelta(0, 0, 500000):
                self.editor.renderer.loadNearbyChunks()
                self.lastRendererUpdate = datetime.now()

            # adjustLimit = 2

            # self.oldMousePosition = (x, y)
            # if (self.startingMousePosition[0] - x > adjustLimit or self.startingMousePosition[1] - y > adjustLimit or
            #   self.startingMousePosition[0] - x < -adjustLimit or self.startingMousePosition[1] - y < -adjustLimit):
            #    mouse.set_pos(*self.startingMousePosition)
            #    event.get(MOUSEMOTION)
            #    self.oldMousePosition = (self.startingMousePosition)

    def activeevent(self, evt):
        if evt.state & 0x2 and evt.gain != 0:
            self.avoidMouseJumpBug = 1

    @property
    def tooltipText(self):
        return self.editor.currentTool.worldTooltipText

    floorQuad = numpy.array(((-4000.0, 0.0, -4000.0),
                     (-4000.0, 0.0, 4000.0),
                     (4000.0, 0.0, 4000.0),
                     (4000.0, 0.0, -4000.0),
                     ), dtype='float32')

    def updateFloorQuad(self):
        floorQuad = ((-4000.0, 0.0, -4000.0),
                     (-4000.0, 0.0, 4000.0),
                     (4000.0, 0.0, 4000.0),
                     (4000.0, 0.0, -4000.0),
                     )

        floorQuad = numpy.array(floorQuad, dtype='float32')
        if self.editor.renderer.inSpace():
            floorQuad *= 8.0
        floorQuad += (self.cameraPosition[0], 0.0, self.cameraPosition[2])
        self.floorQuad = floorQuad
        self.floorQuadList.invalidate()

    def drawFloorQuad(self):
        self.floorQuadList.call(self._drawFloorQuad)

    def _drawCeiling(self):
        lines = []
        minz = minx = -256
        maxz = maxx = 256
        for x in range(minx, maxx + 1, 16):
            lines.append((x, 0, minz))
            lines.append((x, 0, maxz))
        for z in range(minz, maxz + 1, 16):
            lines.append((minx, 0, z))
            lines.append((maxx, 0, z))

        GL.glColor(0.3, 0.7, 0.9)
        GL.glVertexPointer(3, GL.GL_FLOAT, 0, numpy.array(lines, dtype='float32'))

        GL.glEnable(GL.GL_DEPTH_TEST)
        GL.glDepthMask(False)
        GL.glDrawArrays(GL.GL_LINES, 0, len(lines))
        GL.glDisable(GL.GL_DEPTH_TEST)
        GL.glDepthMask(True)

    def drawCeiling(self):
        GL.glMatrixMode(GL.GL_MODELVIEW)
        # GL.glPushMatrix()
        x, y, z = self.cameraPosition
        x -= x % 16
        z -= z % 16
        y = self.editor.level.Height
        GL.glTranslate(x, y, z)
        self.ceilingList.call(self._drawCeiling)
        GL.glTranslate(-x, -y, -z)

    _floorQuadList = None

    @property
    def floorQuadList(self):
        if not self._floorQuadList:
            self._floorQuadList = glutils.DisplayList()
        return self._floorQuadList

    _ceilingList = None

    @property
    def ceilingList(self):
        if not self._ceilingList:
            self._ceilingList = glutils.DisplayList()
        return self._ceilingList

    @property
    def floorColor(self):
        if self.drawSky:
            return 0.0, 0.0, 1.0, 0.3
        else:
            return 0.0, 1.0, 0.0, 0.15

#    floorColor = (0.0, 0.0, 1.0, 0.1)

    def _drawFloorQuad(self):
        GL.glDepthMask(True)
        GL.glPolygonOffset(DepthOffset.ChunkMarkers + 2, DepthOffset.ChunkMarkers + 2)
        GL.glVertexPointer(3, GL.GL_FLOAT, 0, self.floorQuad)
        GL.glColor(*self.floorColor)
        with gl.glEnable(GL.GL_BLEND, GL.GL_DEPTH_TEST, GL.GL_POLYGON_OFFSET_FILL):
            GL.glDrawArrays(GL.GL_QUADS, 0, 4)

    @property
    def drawSky(self):
        return self._drawSky

    @drawSky.setter
    def drawSky(self, val):
        self._drawSky = val
        if self.skyList:
            self.skyList.invalidate()
        if self._floorQuadList:
            self._floorQuadList.invalidate()

    skyList = None

    def drawSkyBackground(self):
        if self.skyList is None:
            self.skyList = glutils.DisplayList()
        self.skyList.call(self._drawSkyBackground)

    def _drawSkyBackground(self):
        GL.glMatrixMode(GL.GL_MODELVIEW)
        GL.glPushMatrix()
        GL.glLoadIdentity()
        GL.glMatrixMode(GL.GL_PROJECTION)
        GL.glPushMatrix()
        GL.glLoadIdentity()
        GL.glEnableClientState(GL.GL_COLOR_ARRAY)

        quad = numpy.array([-1, -1, -1, 1, 1, 1, 1, -1], dtype='float32')
        colors = numpy.array([0x48, 0x49, 0xBA, 0xff,
                         0x8a, 0xaf, 0xff, 0xff,
                         0x8a, 0xaf, 0xff, 0xff,
                         0x48, 0x49, 0xBA, 0xff, ], dtype='uint8')

        alpha = 1.0

        if alpha > 0.0:
            if alpha < 1.0:
                GL.glEnable(GL.GL_BLEND)

            GL.glVertexPointer(2, GL.GL_FLOAT, 0, quad)
            GL.glColorPointer(4, GL.GL_UNSIGNED_BYTE, 0, colors)
            GL.glDrawArrays(GL.GL_QUADS, 0, 4)

            if alpha < 1.0:
                GL.glDisable(GL.GL_BLEND)

        GL.glDisableClientState(GL.GL_COLOR_ARRAY)
        GL.glMatrixMode(GL.GL_PROJECTION)
        GL.glPopMatrix()
        GL.glMatrixMode(GL.GL_MODELVIEW)
        GL.glPopMatrix()

    enableMouseLag = Settings.enableMouseLag.configProperty()

    @property
    def drawFog(self):
        return self._drawFog and not self.editor.renderer.inSpace()

    @drawFog.setter
    def drawFog(self, val):
        self._drawFog = val

    fogColor = numpy.array([0.6, 0.8, 1.0, 1.0], dtype='float32')
    fogColorBlack = numpy.array([0.0, 0.0, 0.0, 1.0], dtype='float32')

    def enableFog(self):
        GL.glEnable(GL.GL_FOG)
        if self.drawSky:
            GL.glFogfv(GL.GL_FOG_COLOR, self.fogColor)
        else:
            GL.glFogfv(GL.GL_FOG_COLOR, self.fogColorBlack)

        GL.glFogf(GL.GL_FOG_DENSITY, 0.002)

    def disableFog(self):
        GL.glDisable(GL.GL_FOG)

    def getCameraPoint(self):
        distance = self.editor.currentTool.cameraDistance
        return [i for i in itertools.imap(lambda p, d: int(numpy.floor(p + d * distance)),
                                                      self.cameraPosition,
                                                      self.cameraVector)]

    blockFaceUnderCursor = (0, 0, 0), (0, 0, 0)

    viewingFrustum = None

    def setup_projection(self):
        distance = 1.0
        if self.editor.renderer.inSpace():
            distance = 8.0
        GLU.gluPerspective(max(self.fov, 25.0), self.ratio, self.near * distance, self.far * distance)

    def setup_modelview(self):
        self.setModelview()

    def gl_draw(self):
        self.tickCamera(self.editor.frameStartTime, self.editor.cameraInputs, self.editor.renderer.inSpace())
        self.render()

    def render(self):
        # if self.visibilityCheck:
        if True:
            self.viewingFrustum = frustum.Frustum.fromViewingMatrix()
        else:
            self.viewingFrustum = None

        # self.editor.drawStars()
        if self.drawSky:
            self.drawSkyBackground()
        if self.drawFog:
            self.enableFog()

        self.drawFloorQuad()

        self.editor.renderer.viewingFrustum = self.viewingFrustum
        self.editor.renderer.draw()
        focusPair = None

        if self.showCeiling and not self.editor.renderer.inSpace():
            self.drawCeiling()

        if self.editor.level:
            try:
                self.updateBlockFaceUnderCursor()
            except (EnvironmentError, pymclevel.ChunkNotPresent) as e:
                logging.debug("Updating cursor block: %s", e)
                self.blockFaceUnderCursor = (None, None)

            root.get_root().update_tooltip()

            focusPair = self.blockFaceUnderCursor

            (blockPosition, faceDirection) = focusPair
            if None != blockPosition:
                self.editor.updateInspectionString(blockPosition)
                # for t in self.toolbar.tools:

                if self.find_widget(mouse.get_pos()) == self:
                    ct = self.editor.currentTool
                    if ct:
                        ct.drawTerrainReticle()
                        ct.drawToolReticle()
                    else:
                        self.editor.drawWireCubeReticle()

            for t in self.editor.toolbar.tools:
                t.drawTerrainMarkers()
            for t in self.editor.toolbar.tools:
                t.drawToolMarkers()

        if self.drawFog:
            self.disableFog()


class ChunkViewport(CameraViewport):
    defaultScale = 1.0  # pixels per block

    def __init__(self, *a, **kw):
        CameraViewport.__init__(self, *a, **kw)

    def setup_projection(self):
        w, h = (0.5 * s / self.defaultScale
                for s in self.size)

        minx, maxx = - w,  w
        miny, maxy = - h,  h
        minz, maxz = -4000, 4000
        GL.glOrtho(minx, maxx, miny, maxy, minz, maxz)

    def setup_modelview(self):
        x, y, z = self.cameraPosition

        GL.glRotate(90.0, 1.0, 0.0, 0.0)
        GL.glTranslate(-x, 0, -z)

    def zoom(self, f):
        x, y, z = self.cameraPosition
        mx, my, mz = self.blockFaceUnderCursor[0]
        dx, dz = mx - x, mz - z
        s = min(4.0, max(1 / 16., self.defaultScale / f))
        if s != self.defaultScale:
            self.defaultScale = s
            f = 1.0 - f

            self.cameraPosition = x + dx * f, self.editor.level.Height, z + dz * f
            self.editor.renderer.loadNearbyChunks()

    incrementFactor = 1.4

    def zoomIn(self):
        self.zoom(1.0 / self.incrementFactor)

    def zoomOut(self):
        self.zoom(self.incrementFactor)

    def mouse_down(self, evt):
        if evt.button == 4:  # wheel up - zoom in
#            if self.defaultScale == 4.0:
#                self.editor.swapViewports()
#            else:
            self.zoomIn()
        elif evt.button == 5:  # wheel down - zoom out
            self.zoomOut()
        else:
            super(ChunkViewport, self).mouse_down(evt)

    def rightClickDown(self, evt):
        pass

    def rightClickUp(self, evt):
        pass

    def mouse_move(self, evt):
        pass

    @mceutils.alertException
    def mouse_drag(self, evt):

        if evt.buttons[2]:
            x, y, z = self.cameraPosition
            dx, dz = evt.rel
            self.cameraPosition = (
                x - dx / self.defaultScale,
                y,
                z - dz / self.defaultScale)
        else:
            super(ChunkViewport, self).mouse_drag(evt)

    def render(self):
        super(ChunkViewport, self).render()

    @property
    def tooltipText(self):
        text = super(ChunkViewport, self).tooltipText
        if text == "1 W x 1 L x 1 H":
            return None
        return text

    def drawCeiling(self):
        pass
#        if self.defaultScale >= 0.5:
#            return super(ChunkViewport, self).drawCeiling()


class LevelEditor(GLViewport):
    anchor = "tlbr"

    def __init__(self, mcedit):
        self.mcedit = mcedit
        rect = mcedit.rect
        GLViewport.__init__(self, rect)

        self.frames = 0
        self.frameStartTime = datetime.now()
        self.oldFrameStartTime = self.frameStartTime

        self.dragInProgress = False

        self.debug = 0
        self.debugString = ""

        self.perfSamples = 5
        self.frameSamples = [timedelta(0, 0, 0)] * 5

        self.unsavedEdits = 0
        self.undoStack = []
        self.copyStack = []

        self.level = None

        self.cameraInputs = [0., 0., 0.]
        self.cameraPanKeys = [0., 0.]
        self.cameraToolDistance = self.defaultCameraToolDistance

        self.createRenderers()

        self.sixteenBlockTex = self.genSixteenBlockTexture()

        # self.Font = Font("Verdana, Arial", 18)

        self.generateStars()

        self.optionsBar = Widget()

        mcEditButton = Button("MCEdit", action=self.showControls)
        viewDistanceDown = Button("<", action=self.decreaseViewDistance)
        viewDistanceUp = Button(">", action=self.increaseViewDistance)
        viewDistanceReadout = ValueDisplay(width=40, ref=AttrRef(self.renderer, "viewDistance"))

        chunksReadout = SmallValueDisplay(width=140,
            get_value=lambda: "Chunks: %d" % len(self.renderer.chunkRenderers),
            tooltipText="Number of chunks loaded into the renderer.")
        fpsReadout = SmallValueDisplay(width=80,
            get_value=lambda: "fps: %0.1f" % self.averageFPS,
            tooltipText="Frames per second.")
        cpsReadout = SmallValueDisplay(width=100,
            get_value=lambda: "cps: %0.1f" % self.averageCPS,
            tooltipText="Chunks per second.")
        mbReadout = SmallValueDisplay(width=60,
            get_value=lambda: "MBv: %0.1f" % (self.renderer.bufferUsage / 1000000.),
            tooltipText="Memory used for vertexes")


        def showViewOptions():
            col = []
            col.append(mceutils.CheckBoxLabel("Entities", fg_color=(0xff, 0x22, 0x22), ref=Settings.drawEntities.propertyRef()))
            col.append(mceutils.CheckBoxLabel("Items", fg_color=(0x22, 0xff, 0x22), ref=Settings.drawItems.propertyRef()))
            col.append(mceutils.CheckBoxLabel("TileEntities", fg_color=(0xff, 0xff, 0x22), ref=Settings.drawTileEntities.propertyRef()))
            col.append(mceutils.CheckBoxLabel("TileTicks", ref=Settings.drawTileTicks.propertyRef()))
            col.append(mceutils.CheckBoxLabel("Unpopulated Chunks", fg_color=renderer.TerrainPopulatedRenderer.color,
                                     ref=Settings.drawUnpopulatedChunks.propertyRef()))

            col.append(mceutils.CheckBoxLabel("Sky", ref=Settings.drawSky.propertyRef()))
            col.append(mceutils.CheckBoxLabel("Fog", ref=Settings.drawFog.propertyRef()))
            col.append(mceutils.CheckBoxLabel("Ceiling",
                ref=Settings.showCeiling.propertyRef()))

            col.append(mceutils.CheckBoxLabel("Hidden Ores",
                ref=Settings.showHiddenOres.propertyRef()))

            col.append(mceutils.CheckBoxLabel("Chunk Redraw", fg_color=(0xff, 0x99, 0x99),
                ref=Settings.showChunkRedraw.propertyRef()))

            col = Column(col, align="r")

            d = QuickDialog()
            d.add(col)
            d.shrink_wrap()
            d.topleft = viewButton.bottomleft
            d.present(centered=False)

        viewButton = Button("Show...", action=showViewOptions)

        mbReadoutRow = Row((mbReadout, Label("")))
        readoutGrid = Grid(((chunksReadout, fpsReadout), (mbReadoutRow, cpsReadout), ), 0, 0)

        self.viewportButton = Button("Camera View", action=self.swapViewports,
            tooltipText="Shortcut: TAB")

        self.recordUndoButton = mceutils.CheckBoxLabel("Record Undo", ref=AttrRef(self, 'recordUndo'))

        row = (mcEditButton, viewDistanceDown, Label("View Distance:"), viewDistanceReadout, viewDistanceUp,
               readoutGrid, viewButton, self.viewportButton, self.recordUndoButton)

        # row += (Button("CR Info", action=self.showChunkRendererInfo), )
        row = Row(row)
        self.add(row)
        self.statusLabel = ValueDisplay(width=self.width, ref=AttrRef(self, "statusText"))

        self.mainViewport = CameraViewport(self)
        self.chunkViewport = ChunkViewport(self)

        self.mainViewport.height -= row.height

        self.mainViewport.height -= self.statusLabel.height
        self.statusLabel.bottom = self.bottom
        self.statusLabel.anchor = "blrh"

        self.add(self.statusLabel)

        self.viewportContainer = Widget(is_gl_container=True, anchor="tlbr")
        self.viewportContainer.top = row.bottom
        self.viewportContainer.size = self.mainViewport.size
        self.add(self.viewportContainer)

        Settings.viewMode.addObserver(self)
        Settings.undoLimit.addObserver(self)

        self.reloadToolbar()

        self.currentTool = None
        self.toolbar.selectTool(0)

        self.controlPanel = ControlPanel(self)
        self.controlPanel.topleft = mcEditButton.bottomleft


    def __del__(self):
        self.deleteAllCopiedSchematics()

    _viewMode = None

    @property
    def viewMode(self):
        return self._viewMode

    @viewMode.setter
    def viewMode(self, val):
        if val == self._viewMode:
            return
        ports = {"Chunk": self.chunkViewport, "Camera": self.mainViewport}
        for p in ports.values():
            p.set_parent(None)
        port = ports.get(val, self.mainViewport)
        self.mainViewport.mouseLookOff()
        self._viewMode = val

        if val == "Camera":
            x, y, z = self.chunkViewport.cameraPosition
            try:
                h = self.level.heightMapAt(int(x), int(z))
            except:
                h = 0
            y = max(self.mainViewport.cameraPosition[1], h + 2)
            self.mainViewport.cameraPosition = x, y, z
            # self.mainViewport.yaw = 180.0
            # self.mainViewport.pitch = 90.0
            self.mainViewport.cameraVector = self.mainViewport._cameraVector()
            self.renderer.overheadMode = False
            self.viewportButton.text = "Chunk View"
        else:
            x, y, z = self.mainViewport.cameraPosition
            self.chunkViewport.cameraPosition = x, y, z
            self.renderer.overheadMode = True
            self.viewportButton.text = "Camera View"

        self.viewportContainer.add(port)
        self.currentViewport = port
        self.chunkViewport.size = self.mainViewport.size = self.viewportContainer.size
        self.renderer.loadNearbyChunks()

    def swapViewports(self):
        if Settings.viewMode.get() == "Chunk":
            Settings.viewMode = "Camera"
        else:
            Settings.viewMode = "Chunk"

    maxCopies = 10

    def addCopiedSchematic(self, sch):
        self.copyStack.insert(0, sch)
        if len(self.copyStack) > self.maxCopies:
            self.deleteCopiedSchematic(self.copyStack[-1])
        self.updateCopyPanel()

    def _deleteSchematic(self, sch):
        if hasattr(sch, 'close'):
            sch.close()
        if sch.filename and os.path.exists(sch.filename):
            os.remove(sch.filename)

    def deleteCopiedSchematic(self, sch):
        self._deleteSchematic(sch)
        self.copyStack = [s for s in self.copyStack if s is not sch]
        self.updateCopyPanel()

    def deleteAllCopiedSchematics(self):
        for s in self.copyStack:
            self._deleteSchematic(s)

    copyPanel = None

    def updateCopyPanel(self):
        if self.copyPanel:
            self.copyPanel.set_parent(None)
        if 0 == len(self.copyStack):
            return

        self.copyPanel = self.createCopyPanel()
        self.copyPanel.topright = self.topright
        self.add(self.copyPanel)

    thumbCache = None
    fboCache = None

    def createCopyPanel(self):
        panel = GLBackground()
        panel.bg_color = (0.0, 0.0, 0.0, 0.5)
        self.thumbCache = thumbCache = self.thumbCache or {}
        self.fboCache = self.fboCache or {}
        for k in self.thumbCache.keys():
            if k not in self.copyStack:
                del self.thumbCache[k]

        def createOneCopyPanel(sch):
            p = GLBackground()
            p.bg_color = (0.0, 0.0, 0.0, 0.4)
            thumb = thumbCache.get(sch)
            if thumb is None:
                thumb = ThumbView(sch)
                thumb.mouse_down = lambda e: self.pasteSchematic(sch)
                thumb.tooltipText = "Click to import this item."
                thumbCache[sch] = thumb
            self.addWorker(thumb.renderer)
            deleteButton = Button("Delete", action=lambda: (self.deleteCopiedSchematic(sch)))
            saveButton = Button("Save", action=lambda: (self.exportSchematic(sch)))
            sizeLabel = Label("{0} x {1} x {2}".format(sch.Length, sch.Width, sch.Height))

            p.add(Row((thumb, Column((sizeLabel, Row((deleteButton, saveButton))), spacing=5))))
            p.shrink_wrap()
            return p

        copies = [createOneCopyPanel(sch) for sch in self.copyStack]

        panel.add(Column(copies, align="l"))
        panel.shrink_wrap()
        panel.anchor = "whrt"
        return panel

    @mceutils.alertException
    def showAnalysis(self, schematic):
        self.analyzeBox(schematic, schematic.bounds)

    def analyzeBox(self, level, box):
        entityCounts = defaultdict(int)
        tileEntityCounts = defaultdict(int)
        types = numpy.zeros(65536, dtype='uint32')

        def _analyzeBox():
            i = 0
            for (chunk, slices, point) in level.getChunkSlices(box):
                i += 1
                yield i, box.chunkCount
                blocks = numpy.array(chunk.Blocks[slices], dtype='uint16')
                blocks |= (numpy.array(chunk.Data[slices], dtype='uint16') << 12)
                b = numpy.bincount(blocks.ravel())
                types[:b.shape[0]] += b

                for ent in chunk.getEntitiesInBox(box):
                    if ent["id"].value == "Item":
                        v = pymclevel.items.items.findItem(ent["Item"]["id"].value,
                                                 ent["Item"]["Damage"].value).name
                    else:
                        v = ent["id"].value
                    entityCounts[(ent["id"].value, v)] += 1
                for ent in chunk.getTileEntitiesInBox(box):
                    tileEntityCounts[ent["id"].value] += 1

        with mceutils.setWindowCaption("ANALYZING - "):
            mceutils.showProgress("Analyzing {0} blocks...".format(box.volume), _analyzeBox(), cancel=True)

        entitySum = numpy.sum(entityCounts.values())
        tileEntitySum = numpy.sum(tileEntityCounts.values())
        presentTypes = types.nonzero()

        blockCounts = sorted([(level.materials[t & 0xfff, t >> 12], types[t]) for t in presentTypes[0]])

        counts = []

        c = 0
        b = level.materials.Air
        for block, count in blockCounts:
            # Collapse waters and lavas together so different fluid levels are counted together
            # xxx optional
            if block.idStr not in ("water", "lava") or b.idStr != block.idStr:
                counts.append((b, c))
                b = block
                c = 0

            c += count
        counts.append((b, c))

        blockRows = [("({0}:{1})".format(block.ID, block.blockData), block.name, count)  for block, count in counts]
        # blockRows.sort(key=lambda x: alphanum_key(x[2]), reverse=True)

        rows = list(blockRows)

        def extendEntities():
            if entitySum:
                rows.extend([("", "", ""), ("", "<Entities>", entitySum)])
                rows.extend([(id[0], id[1], count) for (id, count) in sorted(entityCounts.iteritems())])
            if tileEntitySum:
                rows.extend([("", "", ""), ("", "<TileEntities>", tileEntitySum)])
                rows.extend([(id, id, count) for (id, count) in sorted(tileEntityCounts.iteritems())])
        extendEntities()

        columns = [
            TableColumn("ID", 120),
            TableColumn("Name", 250),
            TableColumn("Count", 100),
        ]
        table = TableView(columns=columns)
        table.sortColumn = columns[2]
        table.reverseSort = True

        def sortColumn(col):
            if table.sortColumn == col:
                table.reverseSort = not table.reverseSort
            else:
                table.reverseSort = (col.title == "Count")
            colnum = columns.index(col)

            def sortKey(x):
                val = x[colnum]
                if isinstance(val, basestring):
                    alphanum_key(val)
                return val

            blockRows.sort(key=sortKey,
                           reverse=table.reverseSort)
            table.sortColumn = col
            rows[:] = blockRows
            extendEntities()

        table.num_rows = lambda: len(rows)
        table.row_data = lambda i: rows[i]
        table.row_is_selected = lambda x: False
        table.click_column_header = sortColumn

        tableBacking = Widget()
        tableBacking.add(table)
        tableBacking.shrink_wrap()

        def saveToFile():
            filename = askSaveFile(mcplatform.docsFolder,
                                   title='Save analysis...',
                                   defaultName=self.level.displayName + "_analysis",
                                   filetype='Comma Separated Values\0*.txt\0\0',
                                   suffix="",
                                   )

            if filename:
                try:
                    csvfile = csv.writer(open(filename, "wb"))
                except Exception, e:
                    alert(str(e))
                else:
                    csvfile.writerows(rows)

        saveButton = Button("Save to file...", action=saveToFile)
        col = Column((Label("Volume: {0} blocks.".format(box.volume)), tableBacking, saveButton))
        Dialog(client=col, responses=["OK"]).present()

    def exportSchematic(self, schematic):
        filename = mcplatform.askSaveSchematic(
            mcplatform.schematicsDir, self.level.displayName, "schematic")

        if filename:
            schematic.saveToFile(filename)

    def getLastCopiedSchematic(self):
        if len(self.copyStack) == 0:
            return None
        return self.copyStack[0]

    toolbar = None

    def reloadToolbar(self):
        self.toolbar = EditorToolbar(self, tools=[editortools.SelectionTool(self),
                      editortools.BrushTool(self),
                      editortools.CloneTool(self),
                      editortools.FillTool(self),
                      editortools.FilterTool(self),
                      editortools.ConstructionTool(self),
                      editortools.PlayerPositionTool(self),
                      editortools.PlayerSpawnPositionTool(self),
                      editortools.ChunkTool(self),
                      ])

        self.toolbar.anchor = 'bwh'
        self.add(self.toolbar)
        self.toolbar.bottom = self.viewportContainer.bottom  # bottoms are touching
        self.toolbar.centerx = self.centerx

    is_gl_container = True

    maxDebug = 1
    allBlend = False
    onscreen = True
    mouseEntered = True
    defaultCameraToolDistance = 10
    mouseSensitivity = 5.0

    longDistanceMode = Settings.longDistanceMode.configProperty()

    def genSixteenBlockTexture(self):
        has12 = GL.glGetString(GL.GL_VERSION) >= "1.2"
        if has12:
            maxLevel = 2
            mode = GL.GL_LINEAR_MIPMAP_NEAREST
        else:
            maxLevel = 1
            mode = GL.GL_LINEAR

        def makeSixteenBlockTex():
            darkColor = (0x30, 0x30, 0x30, 0xff)
            lightColor = (0x80, 0x80, 0x80, 0xff)
            w, h, = 256, 256

            teximage = numpy.zeros((w, h, 4), dtype='uint8')
            teximage[:] = 0xff
            teximage[:, ::16] = lightColor
            teximage[::16, :] = lightColor
            teximage[:2] = darkColor
            teximage[-1:] = darkColor
            teximage[:, -1:] = darkColor
            teximage[:, :2] = darkColor
            # GL.glTexParameter(GL.GL_TEXTURE_2D,
            #                  GL.GL_TEXTURE_MIN_FILTER,
            #                  GL.GL_NEAREST_MIPMAP_NEAREST),
            GL.glTexParameter(GL.GL_TEXTURE_2D,
                              GL.GL_TEXTURE_MAX_LEVEL,
                              maxLevel - 1)

            for lev in range(maxLevel):
                step = 1 << lev
                if lev:
                    teximage[::16] = 0xff
                    teximage[:, ::16] = 0xff
                    teximage[:2] = darkColor
                    teximage[-1:] = darkColor
                    teximage[:, -1:] = darkColor
                    teximage[:, :2] = darkColor

                GL.glTexImage2D(GL.GL_TEXTURE_2D, lev, GL.GL_RGBA8,
                         w / step, h / step, 0,
                         GL.GL_RGBA, GL.GL_UNSIGNED_BYTE,
                         teximage[::step, ::step].ravel())

        return Texture(makeSixteenBlockTex, mode)

    def showProgress(self, *a, **kw):
        return mceutils.showProgress(*a, **kw)

    def drawConstructionCube(self, box, color, texture=None):
        if texture == None:
            texture = self.sixteenBlockTex
        # textured cube faces

        GL.glEnable(GL.GL_BLEND)
        GL.glEnable(GL.GL_DEPTH_TEST)
        GL.glDepthMask(False)

        # edges within terrain
        GL.glDepthFunc(GL.GL_GREATER)
        try:
            GL.glColor(color[0], color[1], color[2], max(color[3], 0.35))
        except IndexError:
            raise
        GL.glLineWidth(1.0)
        mceutils.drawCube(box, cubeType=GL.GL_LINE_STRIP)

        # edges on or outside terrain
        GL.glDepthFunc(GL.GL_LEQUAL)
        GL.glColor(color[0], color[1], color[2], max(color[3] * 2, 0.75))
        GL.glLineWidth(2.0)
        mceutils.drawCube(box, cubeType=GL.GL_LINE_STRIP)

        GL.glDepthFunc(GL.GL_LESS)
        GL.glColor(color[0], color[1], color[2], color[3])
        GL.glDepthFunc(GL.GL_LEQUAL)
        mceutils.drawCube(box, texture=texture, selectionBox=True)
        GL.glDepthMask(True)

        GL.glDisable(GL.GL_BLEND)
        GL.glDisable(GL.GL_DEPTH_TEST)

    def loadFile(self, filename):
        """
        Called when the user picks a level using Load World or Open File.
        """
        if self.level and self.unsavedEdits > 0:
            resp = ask("Save unsaved edits before loading?", ["Cancel", "Don't Save", "Save"], default=2, cancel=0)
            if resp == "Cancel":
                return
            if resp == "Save":
                self.saveFile()


        self.freezeStatus("Loading " + filename)
        if self.level:
            self.level.close()

        try:
            level = pymclevel.fromFile(filename)
        except Exception, e:
            logging.exception(
                'Wasn\'t able to open a file {file => %s}' % filename
            )
            alert(u"I don't know how to open {0}:\n\n{1!r}".format(filename, e))
            return

        assert level

        self.mcedit.addRecentWorld(filename)

        try:
            self.currentViewport.cameraPosition = level.getPlayerPosition()

            y, p = level.getPlayerOrientation()
            if p == -90.0:
                p += 0.000000001
            if p == 90.0:
                p -= 0.000000001
            self.mainViewport.yaw, self.mainViewport.pitch = y, p

            pdim = level.getPlayerDimension()
            if pdim and pdim in level.dimensions:
                level = level.dimensions[pdim]

        except (KeyError, pymclevel.PlayerNotFound):  # TagNotFound
            # player tag not found, maybe
            try:
                self.currentViewport.cameraPosition = level.playerSpawnPosition()
            except KeyError:  # TagNotFound
                self.currentViewport.cameraPosition = numpy.array((0, level.Height * 0.75, 0))
                self.mainViewport.yaw = -45.
                self.mainViewport.pitch = 0.0

        self.removeNetherPanel()

        self.undoStack = []
        self.loadLevel(level)
        self.recordUndo = True
        self.clearUnsavedEdits()

        self.renderer.position = self.currentViewport.cameraPosition
        self.renderer.loadNearbyChunks()

    def loadLevel(self, level):
        """
        Called to load a level, world, or dimension into the editor and display it in the viewport.
        """
        self.level = level

        self.toolbar.selectTool(-1)
        self.toolbar.removeToolPanels()
        self.selectedChunks = set()

        self.mainViewport.stopMoving()

        self.renderer.level = level
        self.addWorker(self.renderer)

        self.initWindowCaption()
        self.selectionTool.selectNone()

        [t.levelChanged() for t in self.toolbar.tools]

        if isinstance(self.level, pymclevel.MCInfdevOldLevel):
            if self.level.parentWorld:
                dimensions = self.level.parentWorld.dimensions
            else:
                dimensions = self.level.dimensions

            dimensionsMenu = [("Earth", "0")]
            dimensionsMenu += [(pymclevel.MCAlphaDimension.dimensionNames.get(dimNo, "Dimension {0}".format(dimNo)), str(dimNo)) for dimNo in dimensions]
            for dim, name in pymclevel.MCAlphaDimension.dimensionNames.iteritems():
                if dim not in dimensions:
                    dimensionsMenu.append((name, str(dim)))

            menu = Menu("", dimensionsMenu)

            def presentMenu():
                x, y = self.netherPanel.topleft
                dimIdx = menu.present(self, (x, y - menu.height))
                if dimIdx == -1:
                    return
                dimNo = int(dimensionsMenu[dimIdx][1])
                self.gotoDimension(dimNo)

            self.netherPanel = Panel()
            self.netherButton = Button("Goto Dimension", action=presentMenu)
            self.netherPanel.add(self.netherButton)
            self.netherPanel.shrink_wrap()
            self.netherPanel.bottomright = self.viewportContainer.bottomright
            self.netherPanel.anchor = "brwh"
            self.add(self.netherPanel)

        if len(list(self.level.allChunks)) == 0:
            resp = ask("It looks like this level is completely empty!  You'll have to create some chunks before you can get started.", responses=["Create Chunks", "Cancel"])
            if resp == "Create Chunks":
                x, y, z = self.mainViewport.cameraPosition
                box = pymclevel.BoundingBox((x - 128, 0, z - 128), (256, self.level.Height, 256))
                self.selectionTool.setSelection(box)
                self.toolbar.selectTool(8)
                self.toolbar.tools[8].createChunks()
                self.mainViewport.cameraPosition = (x, self.level.Height, z)

    def removeNetherPanel(self):
        if self.netherPanel:
            self.remove(self.netherPanel)
            self.netherPanel = None

    @mceutils.alertException
    def gotoEarth(self):
        assert self.level.parentWorld
        self.removeNetherPanel()
        self.loadLevel(self.level.parentWorld)

        x, y, z = self.mainViewport.cameraPosition
        self.mainViewport.cameraPosition = [x * 8, y, z * 8]

    @mceutils.alertException
    def gotoNether(self):
        self.removeNetherPanel()
        x, y, z = self.mainViewport.cameraPosition
        self.mainViewport.cameraPosition = [x / 8, y, z / 8]
        self.loadLevel(self.level.getDimension(-1))

    def gotoDimension(self, dimNo):
        if dimNo == self.level.dimNo:
            return
        elif dimNo == -1 and self.level.dimNo == 0:
            self.gotoNether()
        elif dimNo == 0 and self.level.dimNo == -1:
            self.gotoEarth()
        else:
            self.removeNetherPanel()
            if dimNo:
                if dimNo == 1:
                    self.mainViewport.cameraPosition = (0, 96, 0)
                self.loadLevel(self.level.getDimension(dimNo))

            else:
                self.loadLevel(self.level.parentWorld)

    netherPanel = None

    def initWindowCaption(self):
        filename = self.level.filename
        s = os.path.split(filename)
        title = os.path.split(s[0])[1] + os.sep + s[1] + u" - MCEdit " + release.release
        title = title.encode('ascii', 'replace')
        display.set_caption(title)

    @mceutils.alertException
    def reload(self):
        filename = self.level.filename
        # self.discardAllChunks()
        self.loadFile(filename)

    @mceutils.alertException
    def saveFile(self):
        with mceutils.setWindowCaption("SAVING - "):
            if isinstance(self.level, pymclevel.ChunkedLevelMixin):  # xxx relight indev levels?
                level = self.level
                if level.parentWorld:
                    level = level.parentWorld

                if hasattr(level, 'checkSessionLock'):
                    try:
                        level.checkSessionLock()
                    except SessionLockLost, e:
                        alert(e.message + "\n\nYour changes cannot be saved.")
                        return

                for level in itertools.chain(level.dimensions.itervalues(), [level]):

                    if "Canceled" == mceutils.showProgress("Lighting chunks", level.generateLightsIter(), cancel=True):
                        return

                    if self.level == level:
                        if isinstance(level, pymclevel.MCInfdevOldLevel):
                            needsRefresh = [c.chunkPosition for c in level._loadedChunkData.itervalues() if c.dirty]
                            needsRefresh.extend(level.unsavedWorkFolder.listChunks())
                        else:
                            needsRefresh = [c for c in level.allChunks if level.getChunk(*c).dirty]
                        #xxx change MCInfdevOldLevel to monitor changes since last call
                        self.invalidateChunks(needsRefresh)

            self.freezeStatus("Saving...")
            self.level.saveInPlace()

        self.recordUndo = True
        self.clearUnsavedEdits()

    def addUnsavedEdit(self):
        if self.unsavedEdits:
            self.remove(self.saveInfoBackground)

        self.unsavedEdits += 1

        saveInfoBackground = GLBackground()
        saveInfoBackground.bg_color = (0.0, 0.0, 0.0, 0.6)

        saveInfoLabel = Label(self.saveInfoLabelText)
        saveInfoLabel.anchor = "blwh"
        # saveInfoLabel.width = 500

        saveInfoBackground.add(saveInfoLabel)
        saveInfoBackground.shrink_wrap()

        saveInfoBackground.left = 50
        saveInfoBackground.bottom = self.toolbar.toolbarRectInWindowCoords()[1]

        self.add(saveInfoBackground)
        self.saveInfoBackground = saveInfoBackground

    def clearUnsavedEdits(self):
        if self.unsavedEdits:
            self.unsavedEdits = 0
            self.remove(self.saveInfoBackground)

    @property
    def saveInfoLabelText(self):
        if self.unsavedEdits == 0:
            return ""
        return "{0} unsaved edits.  CTRL-S to save.  {1}".format(self.unsavedEdits, "" if self.recordUndo else "(UNDO DISABLED)")

    @property
    def viewDistanceLabelText(self):
        return "View Distance ({0})".format(self.renderer.viewDistance)

    def createRenderers(self):
        self.renderer = MCRenderer()

        self.workers = deque()

        if self.level:
            self.renderer.level = self.level
            self.addWorker(self.renderer)

        self.renderer.viewDistance = int(Settings.viewDistance.get())

    def addWorker(self, chunkWorker):
        if chunkWorker not in self.workers:
            self.workers.appendleft(chunkWorker)

    def removeWorker(self, chunkWorker):
        if chunkWorker in self.workers:
            self.workers.remove(chunkWorker)

    def getFrameDuration(self):
        frameDuration = timedelta(0, 1, 0) / self.renderer.targetFPS
        return frameDuration

    lastRendererDraw = datetime.now()

    def idleevent(self, e):
        if any(self.cameraInputs) or any(self.cameraPanKeys):
            self.postMouseMoved()

        if(self.renderer.needsImmediateRedraw or
           (self.renderer.needsRedraw and datetime.now() - self.lastRendererDraw > timedelta(0, 1, 0) / 3)):
            self.invalidate()
            self.lastRendererDraw = datetime.now()
        if self.renderer.needsImmediateRedraw:
            self.invalidate()

        if self.get_root().do_draw:
            frameDuration = self.getFrameDuration()

            while frameDuration > (datetime.now() - self.frameStartTime):
                self.doWorkUnit()
            else:
                return

        self.doWorkUnit()

    def activeevent(self, evt):
        self.mainViewport.activeevent(evt)

        if evt.state & 0x4:  # minimized
            if evt.gain == 0:
                logging.debug("Offscreen")
                self.onscreen = False

                self.mouseLookOff()

            else:
                logging.debug("Onscreen")
                self.onscreen = True
                self.invalidate()

        if evt.state & 0x1:  # mouse enter/leave
            if evt.gain == 0:
                logging.debug("Mouse left")
                self.mouseEntered = False
                self.mouseLookOff()

            else:
                logging.debug("Mouse entered")
                self.mouseEntered = True

    def swapDebugLevels(self):
        self.debug += 1
        if self.debug > self.maxDebug:
            self.debug = 0

        if self.debug:
            self.showDebugPanel()
        else:
            self.hideDebugPanel()

    def showDebugPanel(self):
        dp = GLBackground()
        debugLabel = ValueDisplay(width=1100, ref=AttrRef(self, "debugString"))
        inspectLabel = ValueDisplay(width=1100, ref=AttrRef(self, "inspectionString"))
        dp.add(Column((debugLabel, inspectLabel)))
        dp.shrink_wrap()
        dp.bg_color = (0, 0, 0, 0.6)
        self.add(dp)
        dp.top = 40
        self.debugPanel = dp

    def hideDebugPanel(self):
        self.remove(self.debugPanel)

    @property
    def statusText(self):
        try:
            return self.currentTool.statusText
        except Exception, e:
            return repr(e)

    def toolMouseDown(self, evt, f):  # xxx f is a tuple
        if self.level:
            if None != f:
                (focusPoint, direction) = f
                self.currentTool.mouseDown(evt, focusPoint, direction)

    def toolMouseUp(self, evt, f):  # xxx f is a tuple
        if self.level:
            if None != f:
                (focusPoint, direction) = f
                self.currentTool.mouseUp(evt, focusPoint, direction)

    def mouse_up(self, evt):
        button = remapMouseButton(evt.button)
        evt.dict['keyname'] = "mouse{0}".format(button)
        self.key_up(evt)

    def mouse_drag(self, evt):
        # if 'button' not in evt.dict or evt.button != 1:
        #    return
        if self.level:
            f = self.blockFaceUnderCursor
            if None != f:
                (focusPoint, direction) = f
                self.currentTool.mouseDrag(evt, focusPoint, direction)

    def mouse_down(self, evt):
        button = remapMouseButton(evt.button)

        evt.dict['keyname'] = "mouse{0}".format(button)
        self.mcedit.focus_switch = self
        self.focus_switch = None
        self.key_down(evt)

    '''
    def mouseDragOn(self):

        x,y = mouse.get_pos(0)
        if None != self.currentOperation:
            self.dragInProgress = True
            self.dragStartPoint = (x,y)
            self.currentOperation.dragStart(x,y)

    def mouseDragOff(self):
        if self.dragInProgress:
            self.dragInProgress = False
            '''

    def mouseLookOff(self):
        self.mouseWasCaptured = False
        self.mainViewport.mouseLookOff()

    def mouseLookOn(self):
        self.mainViewport.mouseLookOn()

    @property
    def blockFaceUnderCursor(self):
        return self.currentViewport.blockFaceUnderCursor

#    @property
#    def worldTooltipText(self):
#        try:
#            if self.blockFaceUnderCursor:
#                pos = self.blockFaceUnderCursor[0]
#                blockID = self.level.blockAt(*pos)
#                blockData = self.level.blockDataAt(*pos)
#
#                return "{name} ({bid})\n{pos}".format(name=self.level.materials.names[blockID][blockData], bid=blockID,pos=pos)
#
#        except Exception, e:
#            return None
#

    def generateStars(self):
        starDistance = 999.0
        starCount = 2000

        r = starDistance

        randPoints = (numpy.random.random(size=starCount * 3)) * 2.0 * r
        randPoints.shape = (starCount, 3)

        nearbyPoints = (randPoints[:, 0] < r) & (randPoints[:, 1] < r) & (randPoints[:, 2] < r)
        randPoints[nearbyPoints] += r

        randPoints[:starCount / 2, 0] = -randPoints[:starCount / 2, 0]
        randPoints[::2, 1] = -randPoints[::2, 1]
        randPoints[::4, 2] = -randPoints[::4, 2]
        randPoints[1::4, 2] = -randPoints[1::4, 2]

        randsizes = numpy.random.random(size=starCount) * 6 + 0.8

        vertsPerStar = 4

        vertexBuffer = numpy.zeros((starCount, vertsPerStar, 3), dtype='float32')

        def normvector(x):
            return x / numpy.sqrt(numpy.sum(x * x, 1))[:, numpy.newaxis]

        viewVector = normvector(randPoints)

        rmod = numpy.random.random(size=starCount * 3) * 2.0 - 1.0
        rmod.shape = (starCount, 3)
        referenceVector = viewVector + rmod

        rightVector = normvector(numpy.cross(referenceVector, viewVector)) * randsizes[:, numpy.newaxis]  # vector perpendicular to viewing line
        upVector = normvector(numpy.cross(rightVector, viewVector)) * randsizes[:, numpy.newaxis]  # vector perpendicular previous vector and viewing line

        p = randPoints
        p1 = p + (- upVector - rightVector)
        p2 = p + (upVector - rightVector)
        p3 = p + (upVector + rightVector)
        p4 = p + (- upVector + rightVector)

        vertexBuffer[:, 0, :] = p1
        vertexBuffer[:, 1, :] = p2
        vertexBuffer[:, 2, :] = p3
        vertexBuffer[:, 3, :] = p4

        self.starVertices = vertexBuffer.ravel()

    starColor = None

    def drawStars(self):
        pos = self.mainViewport.cameraPosition
        self.mainViewport.cameraPosition = map(lambda x: x / 128.0, pos)
        self.mainViewport.setModelview()

        GL.glColor(.5, .5, .5, 1.)

        GL.glVertexPointer(3, GL.GL_FLOAT, 0, self.starVertices)
        GL.glDrawArrays(GL.GL_QUADS, 0, len(self.starVertices) / 3)

        self.mainViewport.cameraPosition = pos
        self.mainViewport.setModelview()

    fractionalReachAdjustment = True

    def postMouseMoved(self):
        evt = event.Event(MOUSEMOTION, rel=(0, 0), pos=mouse.get_pos(), buttons=mouse.get_pressed())
        event.post(evt)

    def resetReach(self):
        self.postMouseMoved()
        if self.currentTool.resetToolReach():
            return
        self.cameraToolDistance = self.defaultCameraToolDistance

    def increaseReach(self):
        self.postMouseMoved()
        if self.currentTool.increaseToolReach():
            return
        self.cameraToolDistance = self._incrementReach(self.cameraToolDistance)

    def decreaseReach(self):
        self.postMouseMoved()
        if self.currentTool.decreaseToolReach():
            return
        self.cameraToolDistance = self._decrementReach(self.cameraToolDistance)

    def _incrementReach(self, reach):
        reach += 1
        if reach > 30 and self.fractionalReachAdjustment:
            reach *= 1.05
        return reach

    def _decrementReach(self, reach):
        reach -= 1
        if reach > 30 and self.fractionalReachAdjustment:
            reach *= 0.95
        return reach

    def key_up(self, evt):
        d = self.cameraInputs
        keyname = getattr(evt, 'keyname', None) or key.name(evt.key)

        if keyname == config.config.get('Keys', 'Brake'):
            self.mainViewport.brakeOff()

        # if keyname == 'left ctrl' or keyname == 'right ctrl':
        #    self.hideControls()

        if keyname == config.config.get('Keys', 'Left'):
            d[0] = 0.
        if keyname == config.config.get('Keys', 'Right'):
            d[0] = 0.
        if keyname == config.config.get('Keys', 'Forward'):
            d[2] = 0.
        if keyname == config.config.get('Keys', 'Back'):
            d[2] = 0.
        if keyname == config.config.get('Keys', 'Up'):
            d[1] = 0.
        if keyname == config.config.get('Keys', 'Down'):
            d[1] = 0.

        cp = self.cameraPanKeys
        if keyname == config.config.get('Keys', 'Pan Left'):
            cp[0] = 0.
        if keyname == config.config.get('Keys', 'Pan Right'):
            cp[0] = 0.
        if keyname == config.config.get('Keys', 'Pan Up'):
            cp[1] = 0.
        if keyname == config.config.get('Keys', 'Pan Down'):
            cp[1] = 0.

        # if keyname in ("left alt", "right alt"):

    def key_down(self, evt):
        keyname = evt.dict.get('keyname', None) or key.name(evt.key)
        if keyname == 'enter':
            keyname = 'return'

        d = self.cameraInputs
        im = [0., 0., 0.]
        mods = evt.dict.get('mod', 0)

        if keyname == 'f4' and (mods & (KMOD_ALT | KMOD_LALT | KMOD_RALT)):
            self.quit()
            return

        if mods & KMOD_ALT:
            if keyname == "z":
                self.longDistanceMode = not self.longDistanceMode
            if keyname in "12345":
                name = "option" + keyname
                if hasattr(self.currentTool, name):
                    getattr(self.currentTool, name)()

        elif hasattr(evt, 'cmd') and evt.cmd:
            if keyname == 'q' and mcplatform.cmd_name == "Cmd":
                self.quit()
                return

            if keyname == 'f':
                self.swapViewDistance()
            if keyname == 'a':
                self.selectAll()
            if keyname == 'd':
                self.deselect()
            if keyname == 'x':
                self.cutSelection()
            if keyname == 'c':
                self.copySelection()
            if keyname == 'v':
                self.pasteSelection()

            if keyname == 'r':
                self.reload()

            if keyname == 'o':
                self.askOpenFile()
            if keyname == 'l':
                self.askLoadWorld()
            if keyname == 'z':
                self.undo()
            if keyname == 's':
                self.saveFile()
            if keyname == 'n':
                self.createNewLevel()
            if keyname == 'w':
                self.closeEditor()
            if keyname == 'i':
                self.showWorldInfo()
            if keyname == 'g':
                self.showGotoPanel()

            if keyname == 'e':
                self.selectionTool.exportSelection()

            if keyname == 'f9':
                if mods & KMOD_ALT:
                    self.parent.reloadEditor()
                    # ===========================================================
                    # debugPanel = Panel()
                    # buttonColumn = [
                    #    Button("Reload Editor", action=self.parent.reloadEditor),
                    # ]
                    # debugPanel.add(Column(buttonColumn))
                    # debugPanel.shrink_wrap()
                    # self.add_centered(debugPanel)
                    # ===========================================================

                elif mods & KMOD_SHIFT:
                    raise GL.GLError(err=1285, description="User pressed CONTROL-SHIFT-F9, requesting a GL Memory Error")
                else:
                    try:
                        expr = input_text(">>> ", 600)
                        expr = compile(expr, 'eval', 'single')
                        alert("Result: {0!r}".format(eval(expr, globals(), locals())))
                    except Exception, e:
                        alert("Exception: {0!r}".format(e))

            if keyname == 'f10':
                def causeError():
                    raise ValueError("User pressed CONTROL-F10, requesting a program error.")

                if mods & KMOD_ALT:
                    alert("MCEdit, a Minecraft World Editor\n\nCopyright 2010 David Rio Vierra")
                elif mods & KMOD_SHIFT:
                    mceutils.alertException(causeError)()
                else:
                    causeError()

        else:
            if keyname == 'tab':
                self.swapViewports()

            if keyname == config.config.get('Keys', 'Brake'):
                self.mainViewport.brakeOn()

            if keyname == config.config.get('Keys', 'Reset Reach'):
                self.resetReach()
            if keyname == config.config.get('Keys', 'Increase Reach'):
                self.increaseReach()
            if keyname == config.config.get('Keys', 'Decrease Reach'):
                self.decreaseReach()

            if keyname == config.config.get('Keys', 'Flip'):
                self.currentTool.flip()
            if keyname == config.config.get('Keys', 'Roll'):
                self.currentTool.roll()
            if keyname == config.config.get('Keys', 'Rotate'):
                self.currentTool.rotate()
            if keyname == config.config.get('Keys', 'Mirror'):
                self.currentTool.mirror()
            if keyname == config.config.get('Keys', 'Swap'):
                self.currentTool.swap()

            if keyname == 'escape':
                self.toolbar.tools[0].endSelection()
                self.mouseLookOff()
                self.showControls()

            # movement
            if keyname == config.config.get('Keys', 'Left'):
                d[0] = -1.
                im[0] = -1.
            if keyname == config.config.get('Keys', 'Right'):
                d[0] = 1.
                im[0] = 1.
            if keyname == config.config.get('Keys', 'Forward'):
                d[2] = 1.
                im[2] = 1.
            if keyname == config.config.get('Keys', 'Back'):
                d[2] = -1.
                im[2] = -1.
            if keyname == config.config.get('Keys', 'Up'):
                d[1] = 1.
                im[1] = 1.
            if keyname == config.config.get('Keys', 'Down'):
                d[1] = -1.
                im[1] = -1.

            cp = self.cameraPanKeys
            if keyname == config.config.get('Keys', 'Pan Left'):
                cp[0] = -1.
            if keyname == config.config.get('Keys', 'Pan Right'):
                cp[0] = 1.
            if keyname == config.config.get('Keys', 'Pan Up'):
                cp[1] = -1.
            if keyname == config.config.get('Keys', 'Pan Down'):
                cp[1] = 1.

            if keyname == config.config.get('Keys', 'Confirm Construction'):
                self.confirmConstruction()

            # =======================================================================
            # if keyname == config.config.get('Keys','Toggle Flat Shading'):
            #    self.renderer.swapMipmapping()
            # if keyname == config.config.get('Keys','Toggle Lighting'):
            #    self.renderer.toggleLighting()
            # =======================================================================

            if keyname == config.config.get('Keys', 'Toggle FPS Counter'):
                self.swapDebugLevels()

            if keyname == config.config.get('Keys', 'Toggle Renderer'):
                self.renderer.render = not self.renderer.render

            if keyname == config.config.get('Keys', 'Delete Blocks'):
                self.deleteSelectedBlocks()

            if keyname in "123456789":
                self.toolbar.selectTool(int(keyname) - 1)

            if keyname in ('f1', 'f2', 'f3', 'f4', 'f5'):
                self.mcedit.loadRecentWorldNumber(int(keyname[1]))

    def showGotoPanel(self):

        gotoPanel = Widget()
        gotoPanel.X, gotoPanel.Y, gotoPanel.Z = map(int, self.mainViewport.cameraPosition)

        inputRow = (
          Label("X: "), IntField(ref=AttrRef(gotoPanel, "X")),
          Label("Y: "), IntField(ref=AttrRef(gotoPanel, "Y")),
          Label("Z: "), IntField(ref=AttrRef(gotoPanel, "Z")),
        )
        inputRow = Row(inputRow)
        column = (
          Label("Goto Position:"),
          Label("(click anywhere to teleport)"),
          inputRow,
          # Row( (Button("Cancel"), Button("Goto")), align="r" )
        )
        column = Column(column)
        gotoPanel.add(column)
        gotoPanel.shrink_wrap()
        d = Dialog(client=gotoPanel, responses=["Goto", "Cancel"])

        def click_outside(event):
            if event not in d:
                x, y, z = self.blockFaceUnderCursor[0]
                if y == 0:
                    y = 64
                y += 3
                gotoPanel.X, gotoPanel.Y, gotoPanel.Z = x, y, z
                if event.num_clicks == 2:
                    d.dismiss("Goto")

        d.mouse_down = click_outside
        d.top = self.viewportContainer.top + 10
        d.centerx = self.viewportContainer.centerx
        if d.present(centered=False) == "Goto":
            destPoint = gotoPanel.X, gotoPanel.Y, gotoPanel.Z
            if self.currentViewport is self.chunkViewport:
                self.swapViewports()
            self.mainViewport.cameraPosition = destPoint

    def closeEditor(self):
        if self.unsavedEdits:
            answer = ask("Save unsaved edits before closing?", ["Cancel", "Don't Save", "Save"], default=-1, cancel=0)
            if answer == "Save":
                self.saveFile()
            if answer == "Cancel":
                return

        self.unsavedEdits = 0
        self.mainViewport.mouseLookOff()
        self.level = None
        self.renderer.stopWork()
        self.removeWorker(self.renderer)
        self.renderer.level = None
        self.mcedit.removeEditor()

    def repairRegions(self):
        worldFolder = self.level.worldFolder
        for filename in worldFolder.findRegionFiles():
            rf = worldFolder.tryLoadRegionFile(filename)
            if rf:
                rf.repair()

        alert("Repairs complete.  See the console window for details.")

    @mceutils.alertException
    def showWorldInfo(self):
            ticksPerDay = 24000
            ticksPerHour = ticksPerDay / 24
            ticksPerMinute = ticksPerDay / (24 * 60)

            def decomposeMCTime(time):
                day = time / ticksPerDay
                tick = time % ticksPerDay
                hour = tick / ticksPerHour
                tick %= ticksPerHour
                minute = tick / ticksPerMinute
                tick %= ticksPerMinute

                return day, hour, minute, tick

            def composeMCTime(d, h, m, t):
                time = d * ticksPerDay + h * ticksPerHour + m * ticksPerMinute + t
                return time

            worldInfoPanel = Dialog()
            items = []

            t = functools.partial(isinstance, self.level)
            if t(pymclevel.MCInfdevOldLevel):
                if self.level.version == pymclevel.MCInfdevOldLevel.VERSION_ANVIL:
                    levelFormat = "Minecraft Infinite World (Anvil Format)"
                elif self.level.version == pymclevel.MCInfdevOldLevel.VERSION_MCR:
                    levelFormat = "Minecraft Infinite World (Region Format)"
                else:
                    levelFormat = "Minecraft Infinite World (Old Chunk Format)"
            elif t(pymclevel.MCIndevLevel):
                levelFormat = "Minecraft Indev (.mclevel format)"
            elif t(pymclevel.MCSchematic):
                levelFormat = "MCEdit Schematic"
            elif t(pymclevel.ZipSchematic):
                levelFormat = "MCEdit Schematic (Zipped Format)"
            elif t(pymclevel.MCJavaLevel):
                levelFormat = "Minecraft Classic or raw block array"
            else:
                levelFormat = "Unknown"
            formatLabel = Label(levelFormat)
            items.append(Label("Format:"))
            items.append(formatLabel)

            if hasattr(self.level, 'Time'):
                time = self.level.Time
                # timezone adjust -
                # minecraft time shows 0:00 on day 0 at the first sunrise
                # I want that to be 6:00 on day 1, so I add 30 hours
                timezoneAdjust = ticksPerHour * 30
                time += timezoneAdjust

                d, h, m, tick = decomposeMCTime(time)

                dayInput = IntField(value=d, min=1)  # ref=AttrRef(self, "Day"))
                items.append(Row((Label("Day: "), dayInput)))

                timeInput = TimeField(value=(h, m))
                timeInputRow = Row((Label("Time of day:"), timeInput))
                items.append(timeInputRow)

            if hasattr(self.level, 'RandomSeed'):
                seed = self.level.RandomSeed
                seedInputRow = mceutils.IntInputRow("RandomSeed: ", width=250, ref=AttrRef(self.level, "RandomSeed"))
                items.append(seedInputRow)

            if hasattr(self.level, 'GameType'):
                t = self.level.GameType
                types = ["Survival", "Creative"]

                def gametype(t):
                    if t < len(types):
                        return types[t]
                    return "Unknown"

                def action():
                    if b.gametype < 2:
                        b.gametype = 1 - b.gametype
                        b.text = gametype(b.gametype)
                        self.level.GameType = b.gametype
                        self.addUnsavedEdit()

                b = Button(gametype(t), action=action)
                b.gametype = t

                gametypeRow = Row((Label("Game Type: "), b))

                items.append(gametypeRow)

            if isinstance(self.level, pymclevel.MCInfdevOldLevel):
                chunkCount = self.level.chunkCount
                chunkCountLabel = Label("Number of chunks: {0}".format(chunkCount))

                items.append(chunkCountLabel)


            if hasattr(self.level, 'worldFolder'):
                if hasattr(self.level.worldFolder, 'regionFiles'):
                    worldFolder = self.level.worldFolder
                    regionCount = len(worldFolder.regionFiles)
                    regionCountLabel = Label("Number of regions: {0}".format(regionCount))
                    items.append(regionCountLabel)

                button = Button("Repair regions", action=self.repairRegions)
                items.append(button)

            def openFolder():
                filename = self.level.filename
                if not isdir(filename):
                    filename = dirname(filename)
                mcplatform.platform_open(filename)

            revealButton = Button("Open Folder", action=openFolder)
            items.append(revealButton)

            # if all(hasattr(self.level, i) for i in ("Length", "Width", "Height")):
            size = self.level.size
            sizelabel = Label("{L}L x {W}W x {H}H".format(L=size[2], H=size[1], W=size[0]))
            items.append(sizelabel)

            if hasattr(self.level, "Entities"):
                label = Label("{0} Entities".format(len(self.level.Entities)))
                items.append(label)
            if hasattr(self.level, "TileEntities"):
                label = Label("{0} TileEntities".format(len(self.level.TileEntities)))
                items.append(label)

            col = Column(items)

            col = Column((col, Button("OK", action=worldInfoPanel.dismiss)))

            worldInfoPanel.add(col)
            worldInfoPanel.shrink_wrap()

            worldInfoPanel.present()
            if hasattr(self.level, 'Time'):
                h, m = timeInput.value
                time = composeMCTime(dayInput.value, h, m, tick)
                time -= timezoneAdjust
                if self.level.Time != time:
                    self.level.Time = time
                    # xxx TimeChangeOperation
                    self.addUnsavedEdit()

            if hasattr(self.level, 'RandomSeed'):
                if seed != self.level.RandomSeed:
                    self.addUnsavedEdit()

    def swapViewDistance(self):
        if self.renderer.viewDistance >= self.renderer.maxViewDistance:
            self.renderer.viewDistance = self.renderer.minViewDistance
        else:
            self.renderer.viewDistance += 2

        self.addWorker(self.renderer)
        Settings.viewDistance.set(self.renderer.viewDistance)

    def increaseViewDistance(self):
        self.renderer.viewDistance = min(self.renderer.maxViewDistance, self.renderer.viewDistance + 2)
        self.addWorker(self.renderer)
        Settings.viewDistance.set(self.renderer.viewDistance)

    def decreaseViewDistance(self):
        self.renderer.viewDistance = max(self.renderer.minViewDistance, self.renderer.viewDistance - 2)
        self.addWorker(self.renderer)
        Settings.viewDistance.set(self.renderer.viewDistance)

    @mceutils.alertException
    def askLoadWorld(self):
        if not os.path.isdir(pymclevel.saveFileDir):
            alert(u"Could not find the Minecraft saves directory!\n\n({0} was not found or is not a directory)".format(pymclevel.saveFileDir))
            return

        worldPanel = Widget()

        potentialWorlds = os.listdir(pymclevel.saveFileDir)
        potentialWorlds = [os.path.join(pymclevel.saveFileDir, p) for p in potentialWorlds]
        worldFiles = [p for p in potentialWorlds if pymclevel.MCInfdevOldLevel.isLevel(p)]
        worlds = []
        for f in worldFiles:
            try:
                lev = pymclevel.MCInfdevOldLevel(f, readonly=True)
            except Exception:
                continue
            else:
                worlds.append(lev)
        if len(worlds) == 0:
            alert("No worlds found! You should probably play Minecraft to create your first world.")
            return

        def loadWorld():
            self.mcedit.loadFile(worldData[worldTable.selectedWorldIndex][3].filename)

        def click_row(i, evt):
            worldTable.selectedWorldIndex = i
            if evt.num_clicks == 2:
                loadWorld()
                d.dismiss("Cancel")

        worldTable = TableView(columns=[
            TableColumn("Last Played", 250, "l"),
            TableColumn("Level Name (filename)", 400, "l"),
            TableColumn("Dims", 100, "r"),

        ])

        def dateobj(lp):
            try:
                return datetime.utcfromtimestamp(lp / 1000.0)
            except:
                return datetime.utcfromtimestamp(0.0)

        def dateFormat(lp):
            try:
                return lp.strftime("%x %X").decode('utf-8')
            except:
                return u"{0} seconds since the epoch.".format(lp)

        def nameFormat(w):
            if w.LevelName == w.displayName:
                return w.LevelName
            return u"{0} ({1})".format(w.LevelName, w.displayName)

        worldData = [[dateFormat(d), nameFormat(w), str(w.dimensions.keys())[1:-1], w, d]
            for w, d in ((w, dateobj(w.LastPlayed)) for w in worlds)]
        worldData.sort(key=lambda (a, b, dim, w, d): d, reverse=True)
        # worlds = [w[2] for w in worldData]

        worldTable.selectedWorldIndex = 0
        worldTable.num_rows = lambda: len(worldData)
        worldTable.row_data = lambda i: worldData[i]
        worldTable.row_is_selected = lambda x: x == worldTable.selectedWorldIndex
        worldTable.click_row = click_row

        worldPanel.add(worldTable)
        worldPanel.shrink_wrap()

        d = Dialog(worldPanel, ["Load", "Cancel"])
        if d.present() == "Load":
            loadWorld()

    def askOpenFile(self):
        self.mouseLookOff()
        try:
            filename = mcplatform.askOpenFile()
            if filename:
                self.parent.loadFile(filename)
        except Exception:
            logging.exception('Error while asking user for filename')
            return

    def createNewLevel(self):
        self.mouseLookOff()

        newWorldPanel = Widget()
        newWorldPanel.w = newWorldPanel.h = 16
        newWorldPanel.x = newWorldPanel.z = newWorldPanel.f = 0
        newWorldPanel.y = 64
        newWorldPanel.seed = 0

        label = Label("Creating a new world.")
        generatorPanel = GeneratorPanel()

        xinput = mceutils.IntInputRow("X: ", ref=AttrRef(newWorldPanel, "x"))
        yinput = mceutils.IntInputRow("Y: ", ref=AttrRef(newWorldPanel, "y"))
        zinput = mceutils.IntInputRow("Z: ", ref=AttrRef(newWorldPanel, "z"))
        finput = mceutils.IntInputRow("f: ", ref=AttrRef(newWorldPanel, "f"), min=0, max=3)
        xyzrow = Row([xinput, yinput, zinput, finput])
        seedinput = mceutils.IntInputRow("Seed: ", width=250, ref=AttrRef(newWorldPanel, "seed"))

        winput = mceutils.IntInputRow("East-West Chunks: ", ref=AttrRef(newWorldPanel, "w"), min=0)
        hinput = mceutils.IntInputRow("North-South Chunks: ", ref=AttrRef(newWorldPanel, "h"), min=0)
        # grassinputrow = Row( (Label("Grass: ")
        # from editortools import BlockButton
        # blockInput = BlockButton(pymclevel.alphaMaterials, pymclevel.alphaMaterials.Grass)
        # blockInputRow = Row( (Label("Surface: "), blockInput) )

        types = ["Survival", "Creative"]

        def gametype(t):
            if t < len(types):
                return types[t]
            return "Unknown"

        def action():
            if gametypeButton.gametype < 2:
                gametypeButton.gametype = 1 - gametypeButton.gametype
                gametypeButton.text = gametype(gametypeButton.gametype)

        gametypeButton = Button(gametype(0), action=action)
        gametypeButton.gametype = 0
        gametypeRow = Row((Label("Game Type:"), gametypeButton))
        newWorldPanel.add(Column((label, Row([winput, hinput]), xyzrow, seedinput, gametypeRow, generatorPanel), align="l"))
        newWorldPanel.shrink_wrap()

        result = Dialog(client=newWorldPanel, responses=["Create", "Cancel"]).present()
        if result == "Cancel":
            return
        filename = mcplatform.askCreateWorld(pymclevel.saveFileDir)

        if not filename:
            return

        w = newWorldPanel.w
        h = newWorldPanel.h
        x = newWorldPanel.x
        y = newWorldPanel.y
        z = newWorldPanel.z
        f = newWorldPanel.f
        seed = newWorldPanel.seed or None

        self.freezeStatus("Creating world...")
        try:
            newlevel = pymclevel.MCInfdevOldLevel(filename=filename, create=True, random_seed=seed)
            # chunks = list(itertools.product(xrange(w / 2 - w + cx, w / 2 + cx), xrange(h / 2 - h + cz, h / 2 + cz)))

            if generatorPanel.generatorChoice.selectedChoice == "Flatland":
                y = generatorPanel.chunkHeight

            newlevel.setPlayerPosition((x + 0.5, y + 2.8, z + 0.5))
            newlevel.setPlayerOrientation((f * 90.0, 0.0))

            newlevel.setPlayerSpawnPosition((x, y + 1, z))
            newlevel.GameType = gametypeButton.gametype
            newlevel.saveInPlace()
            worker = generatorPanel.generate(newlevel, pymclevel.BoundingBox((x - w * 8, 0, z - h * 8), (w * 16, newlevel.Height, h * 16)))

            if "Canceled" == mceutils.showProgress("Generating chunks...", worker, cancel=True):
                raise RuntimeError("Canceled.")

            if y < 64:
                y = 64
                newlevel.setBlockAt(x, y, z, pymclevel.alphaMaterials.Sponge.ID)

            newlevel.saveInPlace()

            self.loadFile(filename)
        except Exception:
            logging.exception(
                'Error while creating world. {world => %s}' % filename
            )
            return

        return newlevel

    def confirmConstruction(self):
        self.currentTool.confirm()

    def selectionToChunks(self, remove=False, add=False):
        box = self.selectionBox()
        if box:
            if box == self.level.bounds:
                self.selectedChunks = set(self.level.allChunks)
                return

            selectedChunks = self.selectedChunks
            boxedChunks = set(box.chunkPositions)
            if boxedChunks.issubset(selectedChunks):
                remove = True

            if remove and not add:
                selectedChunks.difference_update(boxedChunks)
            else:
                selectedChunks.update(boxedChunks)

        self.selectionTool.selectNone()

    def selectAll(self):

        if self.currentViewport is self.chunkViewport:
            self.selectedChunks = set(self.level.allChunks)
        else:
            self.selectionTool.selectAll()

    def deselect(self):
        self.selectionTool.deselect()
        self.selectedChunks.clear()

    def endSelection(self):
        self.selectionTool.endSelection()

    def cutSelection(self):
        self.selectionTool.cutSelection()

    def copySelection(self):
        self.selectionTool.copySelection()

    def pasteSelection(self):
        schematic = self.getLastCopiedSchematic()
        self.pasteSchematic(schematic)

    def pasteSchematic(self, schematic):
        if schematic == None:
            return
        self.currentTool.cancel()
        craneTool = self.toolbar.tools[5]  # xxx
        self.currentTool = craneTool
        craneTool.loadLevel(schematic)

    def deleteSelectedBlocks(self):
        self.selectionTool.deleteBlocks()

    @mceutils.alertException
    def undo(self):
        if len(self.undoStack) == 0:
            return
        with mceutils.setWindowCaption("UNDOING - "):
            self.freezeStatus("Undoing the previous operation...")
            op = self.undoStack.pop()
            op.undo()
            changedBox = op.dirtyBox()
            if changedBox is not None:
                self.invalidateBox(changedBox)
            if op.changedLevel:
                self.addUnsavedEdit()

    def invalidateBox(self, box):
        self.renderer.invalidateChunksInBox(box)

    def invalidateChunks(self, c):
        self.renderer.invalidateChunks(c)

    def invalidateAllChunks(self):
        self.renderer.invalidateAllChunks()

    def discardAllChunks(self):
        self.renderer.discardAllChunks()

    def addDebugString(self, string):
        if self.debug:
            self.debugString += string

    averageFPS = 0.0
    averageCPS = 0.0
    shouldLoadAndRender = True
    showWorkInfo = False

    def gl_draw(self):
        self.debugString = ""
        self.inspectionString = ""

        if not self.level:
            return

        if not self.shouldLoadAndRender:
            return

        self.renderer.loadVisibleChunks()
        self.addWorker(self.renderer)

        if self.currentTool.previewRenderer:
            self.currentTool.previewRenderer.loadVisibleChunks()
            self.addWorker(self.currentTool.previewRenderer)

        self.frames += 1
        frameDuration = self.getFrameDuration()
        while frameDuration > (datetime.now() - self.frameStartTime):  # if it's less than 0ms until the next frame, go draw.  otherwise, go work.
            self.doWorkUnit()
        if self.showWorkInfo:
            self.updateWorkInfoPanel()

        frameStartTime = datetime.now()
        timeDelta = frameStartTime - self.frameStartTime

        # self.addDebugString("FrameStart: {0}  CameraTick: {1}".format(frameStartTime, self.mainViewport.lastTick))
        # self.addDebugString("D: %d, " % () )

        self.currentFrameDelta = timeDelta
        self.frameSamples.pop(0)
        self.frameSamples.append(timeDelta)

        frameTotal = numpy.sum(self.frameSamples)

        self.averageFPS = 1000000. / ((frameTotal.microseconds + 1000000 * frameTotal.seconds) / float(len(self.frameSamples)) + 0.00001)

        r = self.renderer

        chunkTotal = numpy.sum(r.chunkSamples)
        cps = 1000000. / ((chunkTotal.microseconds + 1000000 * chunkTotal.seconds) / float(len(r.chunkSamples)) + 0.00001)
        self.averageCPS = cps

        self.oldFrameStartTime = self.frameStartTime
        self.frameStartTime = frameStartTime

        if self.debug > 0:
            self.debugString = "FPS: %0.1f/%0.1f, CPS: %0.1f, VD: %d, W: %d, WF: %d, " % (1000000. / (float(timeDelta.microseconds) + 0.000001),
                                                                           self.averageFPS,
                                                                           cps,
                                                                           self.renderer.viewDistance,
                                                                           len(self.workers),
                                                                           self.renderer.workFactor)

            if True:  # xxx
                self.debugString += "DL: {dl} ({dlcount}), Tx: {t}, gc: {g}, ".format(
                    dl=len(glutils.DisplayList.allLists), dlcount=glutils.gl.listCount,
                    t=len(glutils.Texture.allTextures), g=len(gc.garbage))

            if self.renderer:
                self.renderer.addDebugInfo(self.addDebugString)

                # if self.onscreen:

    def createWorkInfoPanel(self):
        infos = []
        for w in sorted(self.workers):
            if isinstance(w, MCRenderer):
                label = Label("Rendering chunks" + ((datetime.now().second / 3) % 3) * ".")
                progress = Label("{0} chunks ({1} pending updates)".format(len(w.chunkRenderers), len(w.invalidChunkQueue)))
                col = Column((label, progress), align="l", width=200)
                infos.append(col)
            elif isinstance(w, RunningOperation):  # **FIXME** Where is RunningOperation supposed to come from?  -David Sowder 20120311
                label = Label(w.description)
                progress = Label(w.progress)
                col = Column((label, progress), align="l", width=200)
                infos.append(col)

        panel = Panel()
        if len(infos):
            panel.add(Column(infos))
            panel.shrink_wrap()
            return panel

    workInfoPanel = None

    def updateWorkInfoPanel(self):
        if self.workInfoPanel:
            self.workInfoPanel.set_parent(None)
        self.workInfoPanel = self.createWorkInfoPanel()
        if self.workInfoPanel:
            self.workInfoPanel.topright = self.topright
            self.add(self.workInfoPanel)

    def doWorkUnit(self):
        if len(self.workers):
            try:
                w = self.workers.popleft()
                w.next()
                self.workers.append(w)
            except StopIteration:
                if hasattr(w, "needsRedraw") and w.needsRedraw:
                    self.invalidate()

        else:
            time.sleep(0.001)

    def updateInspectionString(self, blockPosition):
        self.inspectionString += str(blockPosition) + ": "
        x, y, z = blockPosition
        cx, cz = x // 16, z // 16

        try:
            if self.debug:

                if isinstance(self.level, pymclevel.MCIndevLevel):
                    bl = self.level.blockLightAt(*blockPosition)
                    blockID = self.level.blockAt(*blockPosition)
                    bdata = self.level.blockDataAt(*blockPosition)
                    self.inspectionString += "ID: %d:%d (%s), " % (
                        blockID, bdata, self.level.materials.names[blockID][bdata])
                    self.inspectionString += "Data: %d, Light: %d, " % (bdata, bl)

                elif isinstance(self.level, pymclevel.ChunkedLevelMixin):
                    sl = self.level.skylightAt(*blockPosition)
                    bl = self.level.blockLightAt(*blockPosition)
                    bdata = self.level.blockDataAt(*blockPosition)
                    blockID = self.level.blockAt(*blockPosition)
                    self.inspectionString += "ID: %d:%d (%s), " % (
                        blockID, bdata, self.level.materials.names[blockID][bdata])

                    try:
                        path = self.level.getChunk(cx, cz).filename
                    except:
                        path = "chunks.dat"

                    self.inspectionString += "Data: %d, L: %d, SL: %d" % (
                        bdata, bl, sl)

                    try:
                        hm = self.level.heightMapAt(x, z)
                        self.inspectionString += ", H: %d" % hm
                    except:
                        pass
                    try:
                        tp = self.level.getChunk(cx, cz).TerrainPopulated
                        self.inspectionString += ", TP: %d" % tp
                    except:
                        pass

                    self.inspectionString += ", D: %d" % self.level.getChunk(cx, cz).dirty
                    self.inspectionString += ", NL: %d" % self.level.getChunk(cx, cz).needsLighting
                    try:
                        biome = self.level.getChunk(cx, cz).Biomes[x & 15, z & 15]
                        from pymclevel import biome_types

                        self.inspectionString += ", Bio: %s" % biome_types.biome_types[biome]
                    except AttributeError:
                        pass

                    if isinstance(self.level, pymclevel.pocket.PocketWorld):
                        ch = self.level.getChunk(cx, cz)
                        self.inspectionString += ", DC: %s" % ch.DirtyColumns[z & 15, x & 15]

                    self.inspectionString += ", Ch(%d, %d): %s" % (cx, cz, path)

                else:  # classic
                    blockID = self.level.blockAt(*blockPosition)
                    self.inspectionString += "ID: %d (%s), " % (
                        blockID, self.level.materials.names[blockID][0])

        except Exception, e:
            self.inspectionString += "Chunk {0} had an error: {1!r}".format((int(numpy.floor(blockPosition[0])) >> 4, int(numpy.floor(blockPosition[2])) >> 4), e)
            pass

    def drawWireCubeReticle(self, color=(1.0, 1.0, 1.0, 1.0), position=None):
        GL.glPolygonOffset(DepthOffset.TerrainWire, DepthOffset.TerrainWire)
        GL.glEnable(GL.GL_POLYGON_OFFSET_FILL)

        blockPosition, faceDirection = self.blockFaceUnderCursor
        blockPosition = position or blockPosition

        mceutils.drawTerrainCuttingWire(pymclevel.BoundingBox(blockPosition, (1, 1, 1)), c1=color)

        GL.glDisable(GL.GL_POLYGON_OFFSET_FILL)

    def drawString(self, x, y, color, string):
        return

    def freezeStatus(self, string):
        return

#        GL.glColor(1.0, 0., 0., 1.0)
#
#        # glDrawBuffer(GL.GL_FRONT)
#        GL.glMatrixMode(GL.GL_PROJECTION)
#        GL.glPushMatrix()
#        glRasterPos(50, 100)
#        for i in string:
#            glutBitmapCharacter(GLUT_BITMAP_HELVETICA_18, ord(i))
#
#        # glDrawBuffer(GL.GL_BACK)
#        GL.glMatrixMode(GL.GL_PROJECTION)
#        GL.glPopMatrix()
#        glFlush()
#        display.flip()
#        # while(True): pass

    def selectionSize(self):
        return self.selectionTool.selectionSize()

    def selectionBox(self):
        return self.selectionTool.selectionBox()

    def selectionChanged(self):
        if not self.currentTool.toolEnabled():
            self.toolbar.selectTool(-1)

        self.currentTool.selectionChanged()

    def addOperation(self, op):
        if self.recordUndo:
            self.undoStack.append(op)
            if len(self.undoStack) > self.undoLimit:
                self.undoStack.pop(0)

        self.performWithRetry(op)

    recordUndo = True

    def performWithRetry(self, op):
        try:
            op.perform(self.recordUndo)
        except MemoryError:
            self.invalidateAllChunks()
            op.perform(self.recordUndo)

    def quit(self):
        self.mouseLookOff()
        self.mcedit.confirm_quit()

    mouseWasCaptured = False

    def showControls(self):
        self.controlPanel.present(False)

    infoPanel = None

    def showChunkRendererInfo(self):
        if self.infoPanel:
            self.infoPanel.set_parent(None)
            return

        self.infoPanel = infoPanel = Widget(bg_color=(0, 0, 0, 80))
        infoPanel.add(Label(""))

        def idleHandler(evt):

            x, y, z = self.blockFaceUnderCursor[0]
            cx, cz = x // 16, z // 16
            cr = self.renderer.chunkRenderers.get((cx, cz))
            if None is cr:
                return

            crNames = ["%s - %0.1fkb" % (type(br).__name__, br.bufferSize() / 1000.0) for br in cr.blockRenderers]
            infoLabel = Label("\n".join(crNames))

            infoPanel.remove(infoPanel.subwidgets[0])
            infoPanel.add(infoLabel)
            infoPanel.shrink_wrap()
            self.invalidate()
        infoPanel.idleevent = idleHandler

        infoPanel.topleft = self.viewportContainer.topleft
        self.add(infoPanel)
        infoPanel.click_outside_response = -1
        # infoPanel.present()

##    def testGLSL(self):
##        print "Hello"
##        level = MCLevel.fromFile("mrchunk.schematic")
##        blocks = level.Blocks
##        blockCount = level.Width * level.Length * level.Height,
##        fbo = glGenFramebuffersEXT(1)
##        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo)
##
##        print blockCount, fbo
##
##        destBlocks = numpy.zeros(blockCount, 'uint8')
##        (sourceTex, destTex) = glGenTextures(2)
##
##        glBindTexture(GL_TEXTURE_3D, sourceTex)
##        glTexImage3D(GL_TEXTURE_3D, 0, 1,
##                     level.Width, level.Length, level.Height,
##                     0, GL_RED, GL.GL_UNSIGNED_BYTE,
##                     blocks)
##
##        # return
##
##        glBindTexture(GL.GL_TEXTURE_2D, destTex)
##        glTexImage2D(GL.GL_TEXTURE_2D, 0, 1,
##                     level.Width, level.Length,
##                     0, GL_RED, GL.GL_UNSIGNED_BYTE, destBlocks)
##        glTexParameter(GL.GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
##        glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL.GL_TEXTURE_2D, destTex, 0)
##
##        vertShader = glCreateShader(GL_VERTEX_SHADER)
##
##        vertShaderSource = """
##        void main()
##        {
##            gl_Position = gl_Vertex
##        }
##        """
##
##        glShaderSource(vertShader, vertShaderSource);
##        glCompileShader(vertShader);
##
##        fragShader = glCreateShader(GL_FRAGMENT_SHADER)
##
##        fragShaderSource = """
##        void main()
##        {
##            gl_FragColor = vec4(1.0, 0.0, 1.0, 0.75);
##        }
##        """
##
##        glShaderSource(fragShader, fragShaderSource);
##        glCompileShader(fragShader);
##
##
##
##        prog = glCreateProgram()
##
##        glAttachShader(prog, vertShader)
##        glAttachShader(prog, fragShader)
##        glLinkProgram(prog)
##
##        glUseProgram(prog);
##        # return
##        GL.glDisable(GL.GL_DEPTH_TEST);
##        GL.glVertexPointer(2, GL.GL_FLOAT, 0, [0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0]);
##        GL.glDrawArrays(GL.GL_QUADS, 0, 4);
##        GL.glEnable(GL.GL_DEPTH_TEST);
##
##        glFlush();
##        destBlocks = glGetTexImage(GL.GL_TEXTURE_2D, 0, GL_RED, GL.GL_UNSIGNED_BYTE);
##        print destBlocks, destBlocks[0:8];
##        raise SystemExit;

    def handleMemoryError(self):
        if self.renderer.viewDistance <= 2:
            raise MemoryError("Out of memory. Please restart MCEdit.")
        if hasattr(self.level, 'compressAllChunks'):
            self.level.compressAllChunks()
        self.toolbar.selectTool(-1)

        self.renderer.viewDistance = self.renderer.viewDistance - 4
        self.renderer.discardAllChunks()

        logging.warning(
            'Out of memory, decreasing view distance. {view => %s}' % (
                self.renderer.viewDistance
            )
        )

        Settings.viewDistance.set(self.renderer.viewDistance)
        config.saveConfig()


class EditorToolbar(GLOrtho):
    # is_gl_container = True
    toolbarSize = (184, 24)
    tooltipsUp = True

    toolbarTextureSize = (182., 22.)

    currentToolTextureRect = (0., 22., 24., 24.)
    toolbarWidthRatio = 0.5  # toolbar's width as fraction of screen width.

    def toolbarSizeForScreenWidth(self, width):
        f = max(1, int(width + 398) / 400)

        return map(lambda x: x * f, self.toolbarSize)

        # return ( self.toolbarWidthRatio * width,
        #         self.toolbarWidthRatio * width * self.toolbarTextureSize[1] / self.toolbarTextureSize[0] )

    def __init__(self, rect, tools, *args, **kw):
        GLOrtho.__init__(self, xmin=0, ymin=0,
                               xmax=self.toolbarSize[0], ymax=self.toolbarSize[1],
                               near=-4.0, far=4.0)
        self.size = self.toolbarTextureSize
        self.tools = tools
        for i, t in enumerate(tools):
            t.toolNumber = i
            t.hotkey = i + 1

        self.toolTextures = {}
        self.toolbarDisplayList = glutils.DisplayList()
        self.reloadTextures()

    def set_parent(self, parent):
        GLOrtho.set_parent(self, parent)
        self.parent_resized(0, 0)

    def parent_resized(self, dw, dh):
        self.size = self.toolbarSizeForScreenWidth(self.parent.width)
        self.centerx = self.parent.centerx
        self.bottom = self.parent.viewportContainer.bottom
        # xxx resize children when get

    def getTooltipText(self):
        toolNumber = self.toolNumberUnderMouse(mouse.get_pos())
        return self.tools[toolNumber].tooltipText

    tooltipText = property(getTooltipText)

    def toolNumberUnderMouse(self, pos):
        x, y = self.global_to_local(pos)

        (tx, ty, tw, th) = self.toolbarRectInWindowCoords()

        toolNumber = 9. * x / tw
        return min(int(toolNumber), 8)

    def mouse_down(self, evt):
        if self.parent.level:
            toolNo = self.toolNumberUnderMouse(evt.pos)
            if toolNo < 0 or toolNo > 8:
                return
            if evt.button == 1:
                self.selectTool(toolNo)
            if evt.button == 3:
                self.showToolOptions(toolNo)

    def showToolOptions(self, toolNumber):
        if toolNumber < len(self.tools) and toolNumber >= 0:
            t = self.tools[toolNumber]
            # if not t.toolEnabled():
            #    return
            if t.optionsPanel:
                t.optionsPanel.present()

    def selectTool(self, toolNumber):
        ''' pass a number outside the bounds to pick the selection tool'''
        if toolNumber >= len(self.tools) or toolNumber < 0:
            toolNumber = 0

        t = self.tools[toolNumber]
        if not t.toolEnabled():
            return
        if self.parent.currentTool == t:
            self.parent.currentTool.toolReselected()
        else:
            self.parent.selectionTool.hidePanel()
            if self.parent.currentTool != None:
                self.parent.currentTool.cancel()
            self.parent.currentTool = t
            self.parent.currentTool.toolSelected()

    def removeToolPanels(self):
        for tool in self.tools:
            tool.hidePanel()

    def toolbarRectInWindowCoords(self):
        """returns a rectangle (x, y, w, h) representing the toolbar's
        location in the window.  use for hit testing."""

        (pw, ph) = self.parent.size
        pw = float(pw)
        ph = float(ph)
        x, y = self.toolbarSizeForScreenWidth(pw)
        tw = x * 180. / 182.
        th = y * 20. / 22.

        tx = (pw - tw) / 2
        ty = ph - th * 22. / 20.

        return tx, ty, tw, th

    def toolTextureChanged(self):
        self.toolbarDisplayList.invalidate()

    def reloadTextures(self):
        self.toolTextureChanged()
        self.guiTexture = mceutils.loadPNGTexture('gui.png')
        self.toolTextures = {}

        for tool in self.tools:
            if hasattr(tool, 'reloadTextures'):
                tool.reloadTextures()
            if hasattr(tool, 'markerList'):
                tool.markerList.invalidate()

    def drawToolbar(self):
        GL.glEnableClientState(GL.GL_TEXTURE_COORD_ARRAY)

        GL.glColor(1., 1., 1., 1.)
        w, h = self.toolbarTextureSize

        self.guiTexture.bind()

        GL.glVertexPointer(3, GL.GL_FLOAT, 0, numpy.array((
                               1, h + 1, 0.5,
                               w + 1, h + 1, 0.5,
                               w + 1, 1, 0.5,
                               1, 1, 0.5,
                            ), dtype="f4"))
        GL.glTexCoordPointer(2, GL.GL_FLOAT, 0, numpy.array((
                             0, 0,
                             w, 0,
                             w, h,
                             0, h,
                             ), dtype="f4"))

        GL.glDrawArrays(GL.GL_QUADS, 0, 4)

        for i in range(len(self.tools)):
            tool = self.tools[i]
            if tool.toolIconName is None:
                continue
            try:
                if not tool.toolIconName in self.toolTextures:
                    filename = "toolicons" + os.sep + "{0}.png".format(tool.toolIconName)
                    self.toolTextures[tool.toolIconName] = mceutils.loadPNGTexture(filename)
                x = 20 * i + 4
                y = 4
                w = 16
                h = 16

                self.toolTextures[tool.toolIconName].bind()
                GL.glVertexPointer(3, GL.GL_FLOAT, 0, numpy.array((
                                   x, y + h, 1,
                                   x + w, y + h, 1,
                                   x + w, y, 1,
                                   x, y, 1,
                                ), dtype="f4"))
                GL.glTexCoordPointer(2, GL.GL_FLOAT, 0, numpy.array((
                                 0, 0,
                                 w * 16, 0,
                                 w * 16, h * 16,
                                 0, h * 16,
                                 ), dtype="f4"))

                GL.glDrawArrays(GL.GL_QUADS, 0, 4)
            except Exception:
                logging.exception('Error while drawing toolbar.')
        GL.glDisableClientState(GL.GL_TEXTURE_COORD_ARRAY)

    gfont = None

    def gl_draw(self):

        GL.glEnable(GL.GL_TEXTURE_2D)
        GL.glEnable(GL.GL_BLEND)
        self.toolbarDisplayList.call(self.drawToolbar)
        GL.glColor(1.0, 1.0, 0.0)

        # GL.glEnable(GL.GL_BLEND)

        # with gl.glPushMatrix(GL_TEXTURE):
        #    GL.glLoadIdentity()
        #    self.gfont.flatPrint("ADLADLADLADLADL")

        try:
            currentToolNumber = self.tools.index(self.parent.currentTool)
        except ValueError:
            pass
        else:
            # draw a bright rectangle around the current tool
            (texx, texy, texw, texh) = self.currentToolTextureRect
            # ===================================================================
            # tx = tx + tw * float(currentToolNumber) / 9.
            # tx = tx - (2./20.)*float(tw) / 9
            # ty = ty - (2./20.)*th
            # # tw = th
            # tw = (24./20.)* th
            # th = tw
            #
            # ===================================================================
            tx = 20. * float(currentToolNumber)
            ty = 0.
            tw = 24.
            th = 24.
            GL.glEnableClientState(GL.GL_TEXTURE_COORD_ARRAY)

            self.guiTexture.bind()
            GL.glVertexPointer(3, GL.GL_FLOAT, 0, numpy.array((
                            tx, ty, 2,
                            tx + tw, ty, 2,
                            tx + tw, ty + th, 2,
                            tx, ty + th, 2,
                            ), dtype="f4"))

            GL.glTexCoordPointer(2, GL.GL_FLOAT, 0, numpy.array((
                              texx, texy + texh,
                              texx + texw, texy + texh,
                              texx + texw, texy,
                              texx, texy,
                               ), dtype="f4"))

            GL.glDrawArrays(GL.GL_QUADS, 0, 4)

        GL.glDisableClientState(GL.GL_TEXTURE_COORD_ARRAY)
        GL.glDisable(GL.GL_TEXTURE_2D)

        redOutBoxes = numpy.zeros(9 * 4 * 2, dtype='float32')
        cursor = 0
        for i in range(len(self.tools)):
            t = self.tools[i]
            if t.toolEnabled():
                continue
            redOutBoxes[cursor:cursor + 8] = [
                4 + i * 20, 4,
                4 + i * 20, 20,
                20 + i * 20, 20,
                20 + i * 20, 4,
            ]
            cursor += 8

        if cursor:
            GL.glColor(1.0, 0.0, 0.0, 0.3)
            GL.glVertexPointer(2, GL.GL_FLOAT, 0, redOutBoxes)
            GL.glDrawArrays(GL.GL_QUADS, 0, cursor / 2)

        GL.glDisable(GL.GL_BLEND)