#!/usr/bin/env python ############################################################################# ## ## Copyright (C) 2013 Riverbank Computing Limited. ## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ## All rights reserved. ## ## This file is part of the examples of PyQt. ## ## $QT_BEGIN_LICENSE:BSD$ ## You may use this file under the terms of the BSD license as follows: ## ## "Redistribution and use in source and binary forms, with or without ## modification, are permitted provided that the following conditions are ## met: ## * Redistributions of source code must retain the above copyright ## notice, this list of conditions and the following disclaimer. ## * Redistributions in binary form must reproduce the above copyright ## notice, this list of conditions and the following disclaimer in ## the documentation and/or other materials provided with the ## distribution. ## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor ## the names of its contributors may be used to endorse or promote ## products derived from this software without specific prior written ## permission. ## ## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ## $QT_END_LICENSE$ ## ############################################################################# from PyQt5.QtCore import QFile, QFileInfo, QSettings, Qt, QTextStream from PyQt5.QtGui import QKeySequence from PyQt5.QtWidgets import (QAction, QApplication, QFileDialog, QMainWindow, QMessageBox, QTextEdit) class MainWindow(QMainWindow): MaxRecentFiles = 5 windowList = [] def __init__(self): super(MainWindow, self).__init__() self.recentFileActs = [] self.setAttribute(Qt.WA_DeleteOnClose) self.textEdit = 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, _ = 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, _ = QFileDialog.getSaveFileName(self) if fileName: self.saveFile(fileName) def openRecentFile(self): action = self.sender() if action: self.loadFile(action.data()) def about(self): QMessageBox.about(self, "About Recent Files", "The Recent Files example demonstrates how to provide " "a recently used file menu in a Qt application.") def createActions(self): self.newAct = QAction("&New", self, shortcut=QKeySequence.New, statusTip="Create a new file", triggered=self.newFile) self.openAct = QAction("&Open...", self, shortcut=QKeySequence.Open, statusTip="Open an existing file", triggered=self.open) self.saveAct = QAction("&Save", self, shortcut=QKeySequence.Save, statusTip="Save the document to disk", triggered=self.save) self.saveAsAct = QAction("Save &As...", self, shortcut=QKeySequence.SaveAs, statusTip="Save the document under a new name", triggered=self.saveAs) for i in range(MainWindow.MaxRecentFiles): self.recentFileActs.append( QAction(self, visible=False, triggered=self.openRecentFile)) self.exitAct = QAction("E&xit", self, shortcut="Ctrl+Q", statusTip="Exit the application", triggered=QApplication.instance().closeAllWindows) self.aboutAct = QAction("&About", self, statusTip="Show the application's About box", triggered=self.about) self.aboutQtAct = QAction("About &Qt", self, statusTip="Show the Qt library's About box", triggered=QApplication.instance().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 = QFile(fileName) if not file.open( QFile.ReadOnly | QFile.Text): QMessageBox.warning(self, "Recent Files", "Cannot read file %s:\n%s." % (fileName, file.errorString())) return instr = QTextStream(file) QApplication.setOverrideCursor(Qt.WaitCursor) self.textEdit.setPlainText(instr.readAll()) QApplication.restoreOverrideCursor() self.setCurrentFile(fileName) self.statusBar().showMessage("File loaded", 2000) def saveFile(self, fileName): file = QFile(fileName) if not file.open( QFile.WriteOnly | QFile.Text): QMessageBox.warning(self, "Recent Files", "Cannot write file %s:\n%s." % (fileName, file.errorString())) return outstr = QTextStream(file) QApplication.setOverrideCursor(Qt.WaitCursor) outstr << self.textEdit.toPlainText() 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 = 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 QApplication.topLevelWidgets(): if isinstance(widget, MainWindow): widget.updateRecentFileActions() def updateRecentFileActions(self): settings = 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 QFileInfo(fullFileName).fileName() if __name__ == '__main__': import sys app = QApplication(sys.argv) mainWin = MainWindow() mainWin.show() sys.exit(app.exec_())