#!/usr/bin/env python3 # -*- coding: utf-8 -*- ''' PyQt4 conversion of Qt Tutorial 'Hello Notepad' Many applications will benefit from using a QMainWindow, which has its own layout to which you can add a menu bar, dock widgets, tool bars, and a status bar. QMainWindow has a centre area that can be occupied by any kind of widget. In our case, we will place our text edit there. NOTES: ===== The 'loadAction' has been renamed '_openAction', 'File->Open...' being more of a standard. For now, only local variables are used (no attributes) The two 'slot' methods have been defined as empty private methods. 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, QMainWindow, QAction, QTextEdit) from PyQt4.QtCore import (pyqtSlot) class Notepad(QMainWindow): def __init__(self, parent=None): super(Notepad, self).__init__(parent) # define menu actions openAction = QAction(self.tr("&Open..."), self) saveAction = QAction(self.tr("&Save..."), self) exitAction = QAction(self.tr("&Exit"), self) # set up signal/slot connections for event handling openAction.triggered.connect(self._open) saveAction.triggered.connect(self._save) exitAction.triggered.connect(QApplication.instance().quit) # create a dropdown 'File' menu on the window menu bar fileMenu = self.menuBar().addMenu(self.tr("&File...")) # add the open and save actions to the File menu fileMenu.addAction(openAction) fileMenu.addAction(saveAction) # add the exit action to the menu bar as a separate menu item self.menuBar().addAction(exitAction) # create the textEdit widget and add it as # the central widget for the window textEdit = QTextEdit() self.setCentralWidget(textEdit) self.setWindowTitle(self.tr("Notepad")) # define private slots (methods) ------------------------------------------ @pyqtSlot() def _open(self): pass @pyqtSlot() def _save(self): pass def main(): app = QApplication(sys.argv) notepad = Notepad() notepad.show() sys.exit(app.exec_()) if __name__ == '__main__': main()
Monday, January 23, 2012
Qt 4.8 Notepad Tutorial - Part 4
The following code is based on the Qt Getting Started Programming with Qt Hello Notepad tutorial. There are five parts in all.
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Qt Notepad Tutorial