In this step the application interface doesn't look as if anything has changed; however, the resource icons and
application.qrc files have been saved and compiled using the
pyrcc4 utility (see comments at the head of the code for step by step instructions) and the
createActions() method has been implemented.
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
'''
PyQt4 conversion of Qt Application Example
Before we can implement 'createActions()':
1. save the application icons to an 'images' directory within
your source file directory
2. save the 'application.qrc' file in your source directory
3. compile the 'application.qrc' file using the 'pyrcc4'
utility that installs with PyQt4:
pyrcc4 -py3 -o qrc_app.py application.qrc
4. import the newly created 'qrc_app' file
5. implement 'createActions()'
BEHAVIOUR:
=========
It looks as if nothing has changed but you want to
make sure everything complies ok.
NOTES:
=====
Had to move the creation of the 'self._textEdit' widget to
the beginning of the '__init__' method to make it available
during later method calls.
last modified: 2012-01-25 jg
ref:
http://developer.qt.nokia.com/doc/qt-4.8/mainwindows-application.html
http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/resources.html
http://developer.qt.nokia.com/doc/qt-4.8/mainwindows-application-application-qrc.html
'''
import sys
from PyQt4.QtGui import (QApplication, QMainWindow, QPlainTextEdit, QAction, QIcon, QKeySequence)
from PyQt4.QtCore import (pyqtSlot)
import qrc_app
class MainWindow(QMainWindow): # subclass QMainWindow
def __init__(self, parent=None): # initialise base class
super(MainWindow, self).__init__(parent)
# create central widget
self._textEdit = QPlainTextEdit()
self.setCentralWidget(self._textEdit)
# create GUI
self._createActions()
self._createMenus()
self._createToolBars()
self._createStatusBar()
# connect signals/slots for event handling
self._textEdit.document().contentsChanged.connect(self._documentWasModified)
# establish initial conditions
self._readSettings()
self._setCurrentFile('')
self.setUnifiedTitleAndToolBarOnMac(True)
# overridden methods ------------------------------------------------------
def closeEvent(self, evt):
pass
# private slots -----------------------------------------------------------
@pyqtSlot()
def _newFile(self):
pass
@pyqtSlot()
def _open(self):
pass
@pyqtSlot()
def _save(self):
pass
@pyqtSlot()
def _saveAs(self):
pass
@pyqtSlot()
def _about(self):
pass
@pyqtSlot()
def _documentWasModified(self):
pass
# private methods ---------------------------------------------------------
def _createActions(self):
self._newAct = QAction(QIcon(":/images/new.png"), self.tr("&New"), self)
self._newAct.setShortcuts(QKeySequence.New)
self._newAct.setStatusTip((self.tr("Create a new file.")))
self._newAct.triggered.connect(self._newFile)
self._openAct = QAction(QIcon(":/images/open.png"), self.tr("&Open"), self)
self._openAct.setShortcuts(QKeySequence.Open)
self._openAct.setStatusTip((self.tr("Open a file.")))
self._openAct.triggered.connect(self._open)
self._saveAct = QAction(QIcon(":/images/save.png"), self.tr("&Save"), self)
self._saveAct.setShortcuts(QKeySequence.Save)
self._saveAct.setStatusTip((self.tr("Save the document to disk.")))
self._saveAct.triggered.connect(self._save)
self._saveAsAct = QAction(self.tr("Save &As..."), self)
self._saveAsAct.setShortcuts(QKeySequence.SaveAs)
self._saveAsAct.setStatusTip((self.tr("Save the document under a new name.")))
self._saveAsAct.triggered.connect(self._saveAs)
self._exitAct = QAction(self.tr("E&xit"), self)
self._exitAct.setShortcuts(QKeySequence.Quit)
self._exitAct.setStatusTip((self.tr("Exit the application.")))
self._exitAct.triggered.connect(self.close)
self._aboutAct = QAction(self.tr("&About"), self)
self._aboutAct.setStatusTip((self.tr("Show the application's About box.")))
self._aboutAct.triggered.connect(self._about)
self._aboutQtAct = QAction(self.tr("About &Qt"), self)
self._aboutQtAct.setStatusTip((self.tr("Show the Qt library's About box.")))
self._aboutQtAct.triggered.connect(QApplication.instance().aboutQt)
# actions that connect to the 'textEdit' widget
self._cutAct = QAction(QIcon(":/images/cut.png"), self.tr("Cu&t"), self)
self._cutAct.setShortcuts(QKeySequence.Cut)
self._cutAct.setStatusTip((self.tr("Cut the current selection's content to the clipboard.")))
self._cutAct.triggered.connect(self._textEdit.cut)
self._copyAct = QAction(QIcon(":/images/copy.png"), self.tr("&Copy"), self)
self._copyAct.setShortcuts(QKeySequence.Copy)
self._copyAct.setStatusTip((self.tr("Copy the current selection's content to the clipboard.")))
self._copyAct.triggered.connect(self._textEdit.copy)
self._pasteAct = QAction(QIcon(":/images/paste.png"), self.tr("&Paste"), self)
self._pasteAct.setShortcuts(QKeySequence.Paste)
self._pasteAct.setStatusTip((self.tr("Paste the clipboard contents into the current selection.")))
self._pasteAct.triggered.connect(self._textEdit.paste)
# set action visibility
self._cutAct.setEnabled(False)
self._copyAct.setEnabled((False))
self._textEdit.copyAvailable.connect(self._cutAct.setEnabled)
self._textEdit.copyAvailable.connect(self._copyAct.setEnabled)
def _createMenus(self):
pass
def _createToolBars(self):
pass
def _createStatusBar(self):
pass
def _readSettings(self):
pass
def _writeSettings(self):
pass
def _maybeSave(self):
pass
def _loadFile(self, fname):
pass
def _saveFile(self, fname):
pass
def _setCurrentFile(self, fname):
pass
def _strippedName(self, fullFName):
pass
# main ========================================================================
def main():
app = QApplication(sys.argv)
app.setOrganizationName("My Business")
app.setApplicationName("Application Example")
mw = MainWindow()
mw.setWindowTitle("Application Example")
mw.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()