#!/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_())