Event_Driven_Programming/Hello_world_Stacked Test.py at master · kestrel150/Event_Driven_Programming · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
#Aaron Parker
#170614
#Event Driven Programming

import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Hello World")

        self.stacked_layout =  QStackedLayout()
        self.stacked_widget = QWidget()
        self.stacked_widget.setLayout(self.stacked_layout)
        self.setCentralWidget(self.stacked_widget)

        self.create_main_layout()
        self.create_hello_layout()

        self.stacked_layout.setCurrentIndex(0) #sets the layout that will show first


    def create_main_layout(self):
        #widgets
        self.text_box = QLineEdit()
        self.submit_button = QPushButton("Submit")
        #layout
        self.layout = QVBoxLayout()
        #widgets
        self.layout.addWidget(self.text_box)
        self.layout.addWidget(self.submit_button)
        #Widget to hold layout
        self.widget = QWidget()
        #add layout to widget
        self.widget.setLayout(self.layout)
        #set central widget
        self.stacked_layout.addWidget(self.widget)

        self.submit_button.clicked.connect(self.switch_layout)

    def switch_layout(self):
        index = self.stacked_layout.currentIndex()

        if index == 0:
            self.stacked_layout.setCurrentIndex(1)
        elif index == 1:
            self.stacked_layout.setCurrentIndex(0)

        index = self.stacked_layout.currentIndex()

        if index == 0:
            self.text_box.clear()
        elif index == 1:
            name = self.text_box.text()
            self.label.setText("Hello {0}.".format(name))


    def create_hello_layout(self):
        self.label = QLabel()
        self.back_button = QPushButton("Back")

        self.hello_layout = QVBoxLayout()

        self.hello_layout.addWidget(self.label)
        self.hello_layout.addWidget(self.back_button)

        self.hello_widget = QWidget()

        self.hello_widget.setLayout(self.hello_layout)

        self.stacked_layout.addWidget(self.hello_widget)

        self.back_button.clicked.connect(self.switch_layout)


if __name__ == "__main__":
    application = QApplication(sys.argv)
    window = MainWindow()

    window.show()
    window.raise_()
    application.exec_()