The following code is based on the Qt Getting Started Programming with Qt Hello Notepad tutorial. There are five parts in all.
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
'''
PyQt4 conversion of Qt Tutorial 'Hello Notepad'
In a real application, you will normally need more than one widget.
We will now introduce a QPushButton beneath the text edit.
The button will exit the Notepad application when pushed
(i.e., clicked on with the mouse).
NOTES:
=====
The Quit button uses Qt's signal/slot mechanism to connect an
event message (signal) with a method (slot). In this example,
when the Quit button is 'clicked' the QApplication's instance
quit() method (slot) is called and the application is closed.
On Windows, the Quit button will not display a line under the 'Q' for
the short-cut key until the ALT key is pressed.
last modified: 2012-01-23 jg
ref: http://developer.qt.nokia.com/doc/qt-4.8/gettingstartedqt.html
'''
import sys
from PyQt4.QtGui import (QApplication, QTextEdit, QPushButton, QWidget,
QVBoxLayout)
def main():
app = QApplication(sys.argv) # required for all GUI applications
te = QTextEdit()
te.setText("Click the Quit button to quit.")
quitBtn = QPushButton("&Quit") # ampersand identifies short-cut ALT+Q
# connect the 'quitBtn' signal 'clicked' with slot 'app.quit'
quitBtn.clicked.connect(app.quit)
layout = QVBoxLayout() # create a vertical box layout
layout.addWidget(te) # add the textedit widget
layout.addWidget(quitBtn) # add the quit button
window = QWidget() # create an empty widget
window.setLayout(layout) # give it the layout we just created
window.show() # make everything visible
sys.exit(app.exec_()) # start the main event thread
if __name__ == '__main__':
main()
