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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.
#
############################################################################
import sys
from PyQt4 import QtCore, QtGui
class MainWindow(QtGui.QMainWindow):
MaxRecentFiles = 5
windowList = []
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self.recentFileActs = []
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
self.textEdit = QtGui.QTextEdit()
self.setCentralWidget(self.textEdit)
self.createActions()
self.createMenus()
self.statusBar()
self.setWindowTitle(self.tr("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 not fileName.isEmpty():
self.loadFile(fileName)
def save(self):
if self.curFile.isEmpty():
return self.saveAs()
else:
return self.saveFile(self.curFile)
def saveAs(self):
fileName = QtGui.QFileDialog.getSaveFileName(self)
if fileName.isEmpty():
return False
if QtCore.QFile.exists(fileName):
ret = QtGui.QMessageBox.warning(self, self.tr("Recent Files"),
self.tr("File &1 already exists.\n"
"Do you want to overwrite it?")
.arg(QtCore.QDir.convertSeparators(fileName)),
QtGui.QMessageBox.Yes | QtGui.QMessageBox.Default,
QtGui.QMessageBox.No | QtGui.QMessageBox.Escape)
if ret == QtGui.QMessageBox.No:
return
self.saveFile(fileName)
def openRecentFile(self):
action = self.sender()
if action:
self.loadFile(action.data().toString())
def about(self):
QtGui.QMessageBox.about(self, self.tr("About Recent Files"),
self.tr("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(QtGui.QIcon(":/images/new.png"),self.tr("&New"), self)
self.newAct.setShortcut(self.tr("Ctrl+N"))
self.newAct.setStatusTip(self.tr("Create a new file"))
self.connect(self.newAct, QtCore.SIGNAL("triggered()"), self.newFile)
self.openAct = QtGui.QAction(self.tr("&Open..."), self)
self.openAct.setShortcut(self.tr("Ctrl+O"))
self.openAct.setStatusTip(self.tr("Open an existing file"))
self.connect(self.openAct, QtCore.SIGNAL("triggered()"), self.open)
self.saveAct = QtGui.QAction(self.tr("&Save"), self)
self.saveAct.setShortcut(self.tr("Ctrl+S"))
self.saveAct.setStatusTip(self.tr("Save the document to disk"))
self.connect(self.saveAct, QtCore.SIGNAL("triggered()"), self.save)
self.saveAsAct = QtGui.QAction(self.tr("Save &As..."), self)
self.saveAsAct.setStatusTip(self.tr("Save the document under a new name"))
self.connect(self.saveAsAct, QtCore.SIGNAL("triggered()"), self.saveAs)
for i in range(MainWindow.MaxRecentFiles):
self.recentFileActs.append(QtGui.QAction(self))
self.recentFileActs[i].setVisible(False)
self.connect(self.recentFileActs[i], QtCore.SIGNAL("triggered()"),
self.openRecentFile)
self.closeAct = QtGui.QAction(self.tr("&Close"), self)
self.closeAct.setShortcut(self.tr("Ctrl+W"))
self.closeAct.setStatusTip(self.tr("Close this window"))
self.connect(self.closeAct, QtCore.SIGNAL("triggered()"), self.close)
self.exitAct = QtGui.QAction(self.tr("E&xit"), self)
self.exitAct.setShortcut(self.tr("Ctrl+Q"))
self.exitAct.setStatusTip(self.tr("Exit the application"))
self.connect(self.exitAct, QtCore.SIGNAL("triggered()"),
QtGui.qApp.closeAllWindows)
self.aboutAct = QtGui.QAction(self.tr("&About"), self)
self.aboutAct.setStatusTip(self.tr("Show the application's About box"))
self.connect(self.aboutAct, QtCore.SIGNAL("triggered()"), self.about)
self.aboutQtAct = QtGui.QAction(self.tr("About &Qt"), self)
self.aboutQtAct.setStatusTip(self.tr("Show the Qt library's About box"))
self.connect(self.aboutQtAct, QtCore.SIGNAL("triggered()"), QtGui.qApp.aboutQt)
def createMenus(self):
self.fileMenu = self.menuBar().addMenu(self.tr("&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.closeAct)
self.fileMenu.addAction(self.exitAct)
self.updateRecentFileActions()
self.menuBar().addSeparator()
self.helpMenu = self.menuBar().addMenu(self.tr("&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, self.tr("Recent Files"),
self.tr("Cannot read file %1:\n%2.").arg(fileName).arg(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(self.tr("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, self.tr("Recent Files"),
self.tr("Cannot write file %1:\n%2.").arg(fileName).arg(file.errorString()))
return False
outstr = QtCore.QTextStream(file)
QtGui.QApplication.setOverrideCursor(QtCore.Qt.WaitCursor)
outstr << self.textEdit.toPlainText()
QtGui.QApplication.restoreOverrideCursor()
self.setCurrentFile(fileName)
self.statusBar().showMessage(self.tr("File saved"), 2000)
return True
def setCurrentFile(self, fileName):
self.curFile = fileName
if self.curFile.isEmpty():
self.setWindowTitle(self.tr("Recent Files"))
else:
self.setWindowTitle(self.tr("%1 - %2").arg(self.strippedName(self.curFile))
.arg(self.tr("Recent Files")))
settings = QtCore.QSettings("Trolltech", "Recent Files Example")
files = settings.value("recentFileList").toStringList()
files.removeAll(fileName)
files.prepend(fileName)
while files.count() > MainWindow.MaxRecentFiles:
files.removeAt(files.count()-1)
settings.setValue("recentFileList", QtCore.QVariant(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").toStringList()
numRecentFiles = min(files.count(), MainWindow.MaxRecentFiles)
for i in range(numRecentFiles):
text = self.tr("&%1 %2").arg(i+1).arg(self.strippedName(files[i]))
self.recentFileActs[i].setText(text)
self.recentFileActs[i].setData(QtCore.QVariant(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__":
app = QtGui.QApplication(sys.argv)
mainwindow = MainWindow()
mainwindow.show()
sys.exit(app.exec_())
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