In the following code, the
createMenus(),
createToolBars() and
createStatusBar() methods are implemented, using the
actions created in
Part 2.
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
'''
PyQt4 conversion of Qt Application Example
Implement createMenus(), createToolBars(), createStatusBar()
BEHAVIOUR:
=========
The menus and toolbar icons are now available.
Move the mouse over them to see their tooltips displayed
in the window status bar.
NOTES:
=====
The menus and toolbar share the QAction objects created
earlier.
last modified: 2012-01-25 jg
ref:
http://developer.qt.nokia.com/doc/qt-4.8/mainwindows-application.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):
fileMenu = self.menuBar().addMenu(self.tr("&File"))
fileMenu.addAction(self._newAct)
fileMenu.addAction(self._openAct)
fileMenu.addAction(self._saveAct)
fileMenu.addAction(self._saveAsAct)
fileMenu.addSeparator()
fileMenu.addAction(self._exitAct)
editMenu = self.menuBar().addMenu(self.tr("&Edit"))
editMenu.addAction(self._cutAct)
editMenu.addAction(self._copyAct)
editMenu.addAction(self._pasteAct)
self.menuBar().addSeparator()
helpMenu = self.menuBar().addMenu(self.tr("&Help"))
helpMenu.addAction(self._aboutAct)
helpMenu.addAction(self._aboutQtAct)
def _createToolBars(self):
fileToolBar = self.addToolBar(self.tr("File"))
fileToolBar.addAction(self._newAct)
fileToolBar.addAction(self._openAct)
fileToolBar.addAction(self._saveAct)
editToolBar = self.addToolBar(self.tr("Edit"))
editToolBar.addAction(self._cutAct)
editToolBar.addAction(self._copyAct)
editToolBar.addAction(self._pasteAct)
def _createStatusBar(self):
self.statusBar().showMessage(self.tr("Ready"))
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()
