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Diffstat (limited to 'sources/pyside6/doc/codesnippets/examples/mainwindows/application/mainwindow.py')
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1 files changed, 357 insertions, 0 deletions
diff --git a/sources/pyside6/doc/codesnippets/examples/mainwindows/application/mainwindow.py b/sources/pyside6/doc/codesnippets/examples/mainwindows/application/mainwindow.py new file mode 100644 index 000000000..f9a93cfc8 --- /dev/null +++ b/sources/pyside6/doc/codesnippets/examples/mainwindows/application/mainwindow.py @@ -0,0 +1,357 @@ +############################################################################ +## +## Copyright (C) 2016 The Qt Company Ltd. +## Contact: https://www.qt.io/licensing/ +## +## This file is part of the examples of Qt for Python. +## +## $QT_BEGIN_LICENSE:BSD$ +## Commercial License Usage +## Licensees holding valid commercial Qt licenses may use this file in +## accordance with the commercial license agreement provided with the +## Software or, alternatively, in accordance with the terms contained in +## a written agreement between you and The Qt Company. For licensing terms +## and conditions see https://www.qt.io/terms-conditions. For further +## information use the contact form at https://www.qt.io/contact-us. +## +## BSD License Usage +## Alternatively, 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 The Qt Company Ltd 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." +## +## $QT_END_LICENSE$ +## +############################################################################ + +//! [0] +from PySide6.QtCore import Qt, QFile, QFileInfo, QSettings, QTextStream +from PySide6.QtGui import QIcon +from PySide6.Widgets import (QAction, QApplication, QFileDialog, QMainWindow, + QPlainTextEdit, QFileDialog, QMessageBox, ) +//! [0] + +//! [1] +def __init__(self, parent=None): + QMainWindow.__init__(self) +//! [1] //! [2] + self.textEdit = QPlainTextEdit() + self.setCentralWidget(textEdit) + + self.createActions() + self.createMenus() + self.createToolBars() + self.createStatusBar() + + self.readSettings() + + self.textEdit.document().contentsChanged.connect(self.documentWasModified) + + self.setCurrentFile("") + self.setUnifiedTitleAndToolBarOnMac(True) + +//! [2] + +//! [3] +def closeEvent(self, event): +//! [3] //! [4] + if maybeSave(): + writeSettings() + event.accept() + else: + event.ignore() +//! [4] + +//! [5] +def File(self): +//! [5] //! [6] + if maybeSave(): + textEdit.clear() + setCurrentFile("") +//! [6] + +//! [7] +def open(self): +//! [7] //! [8] + if maybeSave(): + fileName = QFileDialog.getOpenFileName(self) + if not fileName.isEmpty(): + loadFile(fileName) +//! [8] + +//! [9] +def save(self): +//! [9] //! [10] + if curFile.isEmpty(): + return saveAs() + else: + return saveFile(curFile) +//! [10] + +//! [11] +def saveAs(self): +//! [11] //! [12] + fileName = QFileDialog.getSaveFileName(self) + if fileName.isEmpty(): + return False + + return saveFile(fileName) +//! [12] + +//! [13] +def about(self): +//! [13] //! [14] + QMessageBox.about(self, tr("About Application"), + tr("The <b>Application</b> example demonstrates how to " + "write modern GUI applications using Qt, with a menu bar, " + "toolbars, and a status bar.")) + +//! [14] + +//! [15] +def documentWasModified(self): +//! [15] //! [16] + setWindowModified(textEdit.document().isModified()) +//! [16] + +//! [17] +def MainWindow.createActions(self): +//! [17] //! [18] + Act = QAction(QIcon(":/images/new.png"), tr("&New"), self) + Act.setShortcuts(QKeySequence.New) + Act.setStatusTip(tr("Create a new file")) + Act.triggered.connect(newFile) + +//! [19] + openAct = QAction(QIcon(":/images/open.png"), tr("&Open..."), self) + openAct.setShortcuts(QKeySequence.Open) + openAct.setStatusTip(tr("Open an existing file")) + openAct.triggered.connect(open) +//! [18] //! [19] + + saveAct = QAction(QIcon(":/images/save.png"), tr("&Save"), self) + saveAct.setShortcuts(QKeySequence.Save) + saveAct.setStatusTip(tr("Save the document to disk")) + saveAct.triggered.connect(save) + + saveAsAct = QAction(tr("Save &As..."), self) + saveAsAct.setShortcuts(QKeySequence.SaveAs) + saveAsAct.setStatusTip(tr("Save the document under a name")) + saveAsAct.triggered.connect(saveAs) + +//! [20] + exitAct = QAction(tr("E&xit"), self) + exitAct.setShortcut(tr("Ctrl+Q")) +//! [20] + exitAct.setStatusTip(tr("Exit the application")) + exitAct.triggered.connect(close) + +//! [21] + cutAct = QAction(QIcon(":/images/cut.png"), tr("Cu&t"), self) +//! [21] + cutAct.setShortcuts(QKeySequence.Cut) + cutAct.setStatusTip(tr("Cut the current selection's contents to the " + "clipboard")) + cutAct.triggered.connect(cut) + + copyAct = QAction(QIcon(":/images/copy.png"), tr("&Copy"), self) + copyAct.setShortcuts(QKeySequence.Copy) + copyAct.setStatusTip(tr("Copy the current selection's contents to the " + "clipboard")) + copyAct.triggered.connect(copy) + + pasteAct = QAction(QIcon(":/images/paste.png"), tr("&Paste"), self) + pasteAct.setShortcuts(QKeySequence.Paste) + pasteAct.setStatusTip(tr("Paste the clipboard's contents into the current " + "selection")) + pasteAct.triggered.connect(textEdit.paste) + + aboutAct = QAction(tr("&About"), self) + aboutAct.setStatusTip(tr("Show the application's About box")) + aboutAct.triggered.connect(about) + +//! [22] + aboutQtAct = QAction(tr("About &Qt"), self) + aboutQtAct.setStatusTip(tr("Show the Qt library's About box")) + aboutQtAct.triggered.connect(qApp.aboutQt) +//! [22] + +//! [23] + cutAct.setEnabled(False) +//! [23] //! [24] + copyAct.setEnabled(False) + textEdit.copyAvailable[bool].connect(cutAct.setEnabled) + textEdit.copyAvailable[bool].connect(copyAct.setEnabled) +} +//! [24] + +//! [25] //! [26] +def createMenus(self): +//! [25] //! [27] + fileMenu = menuBar().addMenu(tr("&File")) + fileMenu.addAction(Act) +//! [28] + fileMenu.addAction(openAct) +//! [28] + fileMenu.addAction(saveAct) +//! [26] + fileMenu.addAction(saveAsAct) + fileMenu.addSeparator() + fileMenu.addAction(exitAct) + + editMenu = menuBar().addMenu(tr("&Edit")) + editMenu.addAction(cutAct) + editMenu.addAction(copyAct) + editMenu.addAction(pasteAct) + + menuBar().addSeparator() + + helpMenu = menuBar().addMenu(tr("&Help")) + helpMenu.addAction(aboutAct) + helpMenu.addAction(aboutQtAct) + +//! [27] + +//! [29] //! [30] +def createToolBars(self): + fileToolBar = addToolBar(tr("File")) + fileToolBar.addAction(Act) +//! [29] //! [31] + fileToolBar.addAction(openAct) +//! [31] + fileToolBar.addAction(saveAct) + + editToolBar = addToolBar(tr("Edit")) + editToolBar.addAction(cutAct) + editToolBar.addAction(copyAct) + editToolBar.addAction(pasteAct) +//! [30] + +//! [32] +def createStatusBar(self): +//! [32] //! [33] + statusBar().showMessage(tr("Ready")) + +//! [33] + +//! [34] //! [35] +def readSettings(self): +//! [34] //! [36] + settings("Trolltech", "Application Example") + pos = settings.value("pos", QPoint(200, 200)).toPoint() + size = settings.value("size", QSize(400, 400)).toSize() + resize(size) + move(pos) + +//! [35] //! [36] + +//! [37] //! [38] +def writeSettings(self): +//! [37] //! [39] + settings = QSettings("Trolltech", "Application Example") + settings.setValue("pos", pos()) + settings.setValue("size", size()) + +//! [38] //! [39] + +//! [40] +def maybeSave(self): +//! [40] //! [41] + if textEdit.document()->isModified(): + ret = QMessageBox.warning(self, tr("Application"), + tr("The document has been modified.\n" + "Do you want to save your changes?"), + QMessageBox.Save | QMessageBox.Discard | QMessageBox.Cancel) + if ret == QMessageBox.Save: + return save() + elif ret == QMessageBox.Cancel: + return False + return True +//! [41] + +//! [42] +def loadFile(self, fileName): +//! [42] //! [43] + file = QFile(fileName) + if !file.open(QFile.ReadOnly | QFile.Text): + QMessageBox.warning(self, tr("Application"), tr("Cannot read file " + "{}:\n{}.".format(fileName, file.errorString()))) + return + + in = QTextStream(file) + QApplication.setOverrideCursor(Qt::WaitCursor) + textEdit.setPlainText(in.readAll()) + QApplication.restoreOverrideCursor() + + self.setCurrentFile(fileName) + self.statusBar().showMessage(tr("File loaded"), 2000) + +//! [43] + +//! [44] +def saveFile(self, fileName): +//! [44] //! [45] + file = QFile(fileName) + if !file.open(QFile.WriteOnly | QFile::Text): + QMessageBox.warning(self, tr("Application"), + tr("Cannot write file %1:\n%2.") + .arg(fileName) + .arg(file.errorString())) + return False + + out = QTextStream(file) + QApplication.setOverrideCursor(Qt.WaitCursor) + out << textEdit.toPlainText() + QApplication.restoreOverrideCursor() + + setCurrentFile(fileName) + statusBar().showMessage(tr("File saved"), 2000) + return True + +//! [45] + +//! [46] +def setCurrentFile(fileName): +//! [46] //! [47] + curFile = fileName + textEdit.document().setModified(False) + setWindowModified(False) + + if curFile.isEmpty(): + shownName = "untitled.txt" + else: + shownName = strippedName(curFile) + + setWindowTitle(tr("%1[*] - %2").arg(shownName).arg(tr("Application"))) + +//! [47] + +//! [48] +def strippedName(self, fullFileName): +//! [48] //! [49] + return QFileInfo(fullFileName).fileName() +//! [49] |