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#!/usr/bin/env python
############################################################################
#
# Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
#
# This file is part of the example classes of the Qt Toolkit.
#
# This file may be used under the terms of the GNU General Public
# License version 2.0 as published by the Free Software Foundation
# and appearing in the file LICENSE.GPL included in the packaging of
# self file. Please review the following information to ensure GNU
# General Public Licensing requirements will be met:
# http://www.trolltech.com/products/qt/opensource.html
#
# If you are unsure which license is appropriate for your use, please
# review the following information:
# http://www.trolltech.com/products/qt/licensing.html or contact the
# sales department at sales@trolltech.com.
#
# This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
# WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
############################################################################
# This is only needed for Python v2 but is harmless for Python v3.
import sip
sip.setapi('QString', 2)
sip.setapi('QVariant', 2)
from PyQt4 import QtCore, QtGui
class MainWindow(QtGui.QMainWindow):
MaxRecentFiles = 5
windowList = []
def __init__(self):
super(MainWindow, self).__init__()
self.recentFileActs = []
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
self.textEdit = QtGui.QTextEdit()
self.setCentralWidget(self.textEdit)
self.createActions()
self.createMenus()
self.statusBar()
self.setWindowTitle("Recent Files")
self.resize(400, 300)
def newFile(self):
other = MainWindow()
MainWindow.windowList.append(other)
other.show()
def open(self):
fileName = QtGui.QFileDialog.getOpenFileName(self)
if fileName:
self.loadFile(fileName)
def save(self):
if self.curFile:
self.saveFile(self.curFile)
else:
self.saveAs()
def saveAs(self):
fileName = QtGui.QFileDialog.getSaveFileName(self)
if fileName:
self.saveFile(fileName)
def openRecentFile(self):
action = self.sender()
if action:
self.loadFile(action.data())
def about(self):
QtGui.QMessageBox.about(self, "About Recent Files",
"The <b>Recent Files</b> example demonstrates how to provide "
"a recently used file menu in a Qt application.")
def createActions(self):
self.newAct = QtGui.QAction("&New", self,
shortcut=QtGui.QKeySequence.New,
statusTip="Create a new file", triggered=self.newFile)
self.openAct = QtGui.QAction("&Open...", self,
shortcut=QtGui.QKeySequence.Open,
statusTip="Open an existing file", triggered=self.open)
self.saveAct = QtGui.QAction("&Save", self,
shortcut=QtGui.QKeySequence.Save,
statusTip="Save the document to disk", triggered=self.save)
self.saveAsAct = QtGui.QAction("Save &As...", self,
shortcut=QtGui.QKeySequence.SaveAs,
statusTip="Save the document under a new name",
triggered=self.saveAs)
for i in range(MainWindow.MaxRecentFiles):
self.recentFileActs.append(
QtGui.QAction(self, visible=False,
triggered=self.openRecentFile))
self.exitAct = QtGui.QAction("E&xit", self, shortcut="Ctrl+Q",
statusTip="Exit the application",
triggered=QtGui.qApp.closeAllWindows)
self.aboutAct = QtGui.QAction("&About", self,
statusTip="Show the application's About box",
triggered=self.about)
self.aboutQtAct = QtGui.QAction("About &Qt", self,
statusTip="Show the Qt library's About box",
triggered=QtGui.qApp.aboutQt)
def createMenus(self):
self.fileMenu = self.menuBar().addMenu("&File")
self.fileMenu.addAction(self.newAct)
self.fileMenu.addAction(self.openAct)
self.fileMenu.addAction(self.saveAct)
self.fileMenu.addAction(self.saveAsAct)
self.separatorAct = self.fileMenu.addSeparator()
for i in range(MainWindow.MaxRecentFiles):
self.fileMenu.addAction(self.recentFileActs[i])
self.fileMenu.addSeparator()
self.fileMenu.addAction(self.exitAct)
self.updateRecentFileActions()
self.menuBar().addSeparator()
self.helpMenu = self.menuBar().addMenu("&Help")
self.helpMenu.addAction(self.aboutAct)
self.helpMenu.addAction(self.aboutQtAct)
def loadFile(self, fileName):
file = QtCore.QFile(fileName)
if not file.open( QtCore.QFile.ReadOnly | QtCore.QFile.Text):
QtGui.QMessageBox.warning(self, "Recent Files",
"Cannot read file %s:\n%s." % (fileName, file.errorString()))
return
instr = QtCore.QTextStream(file)
QtGui.QApplication.setOverrideCursor(QtCore.Qt.WaitCursor)
self.textEdit.setPlainText(instr.readAll())
QtGui.QApplication.restoreOverrideCursor()
self.setCurrentFile(fileName)
self.statusBar().showMessage("File loaded", 2000)
def saveFile(self, fileName):
file = QtCore.QFile(fileName)
if not file.open( QtCore.QFile.WriteOnly | QtCore.QFile.Text):
QtGui.QMessageBox.warning(self, "Recent Files",
"Cannot write file %s:\n%s." % (fileName, file.errorString()))
return
outstr = QtCore.QTextStream(file)
QtGui.QApplication.setOverrideCursor(QtCore.Qt.WaitCursor)
outstr << self.textEdit.toPlainText()
QtGui.QApplication.restoreOverrideCursor()
self.setCurrentFile(fileName)
self.statusBar().showMessage("File saved", 2000)
def setCurrentFile(self, fileName):
self.curFile = fileName
if self.curFile:
self.setWindowTitle("%s - Recent Files" % self.strippedName(self.curFile))
else:
self.setWindowTitle("Recent Files")
settings = QtCore.QSettings('Trolltech', 'Recent Files Example')
files = settings.value('recentFileList')
try:
files.remove(fileName)
except ValueError:
pass
files.insert(0, fileName)
del files[MainWindow.MaxRecentFiles:]
settings.setValue('recentFileList', files)
for widget in QtGui.QApplication.topLevelWidgets():
if isinstance(widget, MainWindow):
widget.updateRecentFileActions()
def updateRecentFileActions(self):
settings = QtCore.QSettings('Trolltech', 'Recent Files Example')
files = settings.value('recentFileList')
numRecentFiles = min(len(files), MainWindow.MaxRecentFiles)
for i in range(numRecentFiles):
text = "&%d %s" % (i + 1, self.strippedName(files[i]))
self.recentFileActs[i].setText(text)
self.recentFileActs[i].setData(files[i])
self.recentFileActs[i].setVisible(True)
for j in range(numRecentFiles, MainWindow.MaxRecentFiles):
self.recentFileActs[j].setVisible(False)
self.separatorAct.setVisible((numRecentFiles > 0))
def strippedName(self, fullFileName):
return QtCore.QFileInfo(fullFileName).fileName()
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
mainWin = MainWindow()
mainWin.show()
sys.exit(app.exec_())
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