BoxExample.py

# Example dialog box and creation of a simple box.
# Code from https://subscription.packtpub.com/book/iot-&-hardware/9781849518864/1/ch01lvl1sec15/creating-a-custom-dialog-to-automate-a-task-(become-an-expert)


from PyQt4 import QtGui,QtCore
import Part,FreeCAD
from FreeCAD import Base,Vector

class BoxExample(QtGui.QWidget):
    def __init__(self):
        super(BoxExample, self).__init__()
        self.initUI()
    def initUI(self):
        self.setGeometry(100, 100,300, 200)
        self.setWindowTitle('Make a Box!')
        self.lengthLabel = QtGui.QLabel("Length: ",self)
        self.lengthLabel.move(50, 15)
        self.length = QtGui.QLineEdit(self)
        self.length.move(100, 15)
        self.widthLabel = QtGui.QLabel("Width: ",self)
        self.widthLabel.move(50, 50)
        self.width = QtGui.QLineEdit(self)
        self.width.move(100, 50)
        self.heightLabel = QtGui.QLabel("Height: ",self)
        self.heightLabel.move(50, 85)
        self.height = QtGui.QLineEdit(self)
        self.height.move(100, 85)
        self.centered=QtGui.QCheckBox("Center on XY",self)
        self.centered.move(80, 115)
        self.centerbox = False
        self.centered.stateChanged.connect(self.changeState)
        self.okButton = QtGui.QPushButton("Create Box",self)
        self.okButton.move(160, 150)
        self.show()
        QtCore.QObject.connect \
(self.okButton, QtCore.SIGNAL("pressed()"),self.box)  
    def changeState(self, state):
        console=FreeCAD.Console
        if state == QtCore.Qt.Checked:
            console.PrintMessage("Box will be centered\n")
            self.centerbox = True
        else:
            self.centerbox = False
    def box(self):
        l = float(self.length.text())
        w = float(self.width.text())
        h = float(self.height.text())
        if self.centerbox == True:
            box = Part.makeBox(l,w,h)
            box.translate(Base.Vector(-l/2,-w/2,0))
        else:
            box = Part.makeBox(l,w,h)
        Part.show(box)

d = BoxExample()