diff options
Diffstat (limited to 'examples/widgets/mainwindows/application/application.py')
| -rw-r--r-- | examples/widgets/mainwindows/application/application.py | 415 |
1 files changed, 200 insertions, 215 deletions
diff --git a/examples/widgets/mainwindows/application/application.py b/examples/widgets/mainwindows/application/application.py index 8c4626f9b..f69eade2e 100644 --- a/examples/widgets/mainwindows/application/application.py +++ b/examples/widgets/mainwindows/application/application.py @@ -1,275 +1,260 @@ +# Copyright (C) 2013 Riverbank Computing Limited. +# Copyright (C) 2022 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause -############################################################################# -## -## Copyright (C) 2013 Riverbank Computing Limited. -## Copyright (C) 2016 The Qt Company Ltd. -## Contact: http://www.qt.io/licensing/ -## -## This file is part of the Qt for Python examples of the Qt Toolkit. -## -## $QT_BEGIN_LICENSE:BSD$ -## 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 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." -## -## $QT_END_LICENSE$ -## -############################################################################# - -from PySide2 import QtCore, QtGui, QtWidgets - -import application_rc - -class MainWindow(QtWidgets.QMainWindow): +from argparse import ArgumentParser, RawTextHelpFormatter +import sys + +from PySide6.QtCore import (QByteArray, QFile, QFileInfo, QSaveFile, QSettings, + QTextStream, Qt, Slot) +from PySide6.QtGui import QAction, QIcon, QKeySequence +from PySide6.QtWidgets import (QApplication, QFileDialog, QMainWindow, + QMessageBox, QTextEdit) + +import application_rc # noqa: F401 + + +class MainWindow(QMainWindow): def __init__(self): - super(MainWindow, self).__init__() + super().__init__() - self.curFile = '' + self._cur_file = '' - self.textEdit = QtWidgets.QTextEdit() - self.setCentralWidget(self.textEdit) + self._text_edit = QTextEdit() + self.setCentralWidget(self._text_edit) - self.createActions() - self.createMenus() - self.createToolBars() - self.createStatusBar() + self.create_actions() + self.create_menus() + self.create_tool_bars() + self.create_status_bar() - self.readSettings() + self.read_settings() - self.textEdit.document().contentsChanged.connect(self.documentWasModified) + self._text_edit.document().contentsChanged.connect(self.document_was_modified) - self.setCurrentFile('') + self.set_current_file('') self.setUnifiedTitleAndToolBarOnMac(True) def closeEvent(self, event): - if self.maybeSave(): - self.writeSettings() + if self.maybe_save(): + self.write_settings() event.accept() else: event.ignore() - def newFile(self): - if self.maybeSave(): - self.textEdit.clear() - self.setCurrentFile('') + @Slot() + def new_file(self): + if self.maybe_save(): + self._text_edit.clear() + self.set_current_file('') + @Slot() def open(self): - if self.maybeSave(): - fileName, filtr = QtWidgets.QFileDialog.getOpenFileName(self) + if self.maybe_save(): + fileName, filtr = QFileDialog.getOpenFileName(self) if fileName: - self.loadFile(fileName) + self.load_file(fileName) + @Slot() def save(self): - if self.curFile: - return self.saveFile(self.curFile) + if self._cur_file: + return self.save_file(self._cur_file) - return self.saveAs() + return self.save_as() - def saveAs(self): - fileName, filtr = QtWidgets.QFileDialog.getSaveFileName(self) + @Slot() + def save_as(self): + fileName, filtr = QFileDialog.getSaveFileName(self) if fileName: - return self.saveFile(fileName) + return self.save_file(fileName) return False + @Slot() def about(self): - QtWidgets.QMessageBox.about(self, "About Application", - "The <b>Application</b> example demonstrates how to write " - "modern GUI applications using Qt, with a menu bar, " - "toolbars, and a status bar.") - - def documentWasModified(self): - self.setWindowModified(self.textEdit.document().isModified()) - - def createActions(self): - self.newAct = QtWidgets.QAction(QtGui.QIcon(':/images/new.png'), "&New", - self, shortcut=QtGui.QKeySequence.New, - statusTip="Create a new file", triggered=self.newFile) - - self.openAct = QtWidgets.QAction(QtGui.QIcon(':/images/open.png'), - "&Open...", self, shortcut=QtGui.QKeySequence.Open, - statusTip="Open an existing file", triggered=self.open) - - self.saveAct = QtWidgets.QAction(QtGui.QIcon(':/images/save.png'), - "&Save", self, shortcut=QtGui.QKeySequence.Save, - statusTip="Save the document to disk", triggered=self.save) - - self.saveAsAct = QtWidgets.QAction("Save &As...", self, - shortcut=QtGui.QKeySequence.SaveAs, - statusTip="Save the document under a new name", - triggered=self.saveAs) - - self.exitAct = QtWidgets.QAction("E&xit", self, shortcut="Ctrl+Q", - statusTip="Exit the application", triggered=self.close) - - self.cutAct = QtWidgets.QAction(QtGui.QIcon(':/images/cut.png'), "Cu&t", - self, shortcut=QtGui.QKeySequence.Cut, - statusTip="Cut the current selection's contents to the clipboard", - triggered=self.textEdit.cut) - - self.copyAct = QtWidgets.QAction(QtGui.QIcon(':/images/copy.png'), - "&Copy", self, shortcut=QtGui.QKeySequence.Copy, - statusTip="Copy the current selection's contents to the clipboard", - triggered=self.textEdit.copy) - - self.pasteAct = QtWidgets.QAction(QtGui.QIcon(':/images/paste.png'), - "&Paste", self, shortcut=QtGui.QKeySequence.Paste, - statusTip="Paste the clipboard's contents into the current selection", - triggered=self.textEdit.paste) - - self.aboutAct = QtWidgets.QAction("&About", self, - statusTip="Show the application's About box", - triggered=self.about) - - self.aboutQtAct = QtWidgets.QAction("About &Qt", self, - statusTip="Show the Qt library's About box", - triggered=qApp.aboutQt) - - self.cutAct.setEnabled(False) - self.copyAct.setEnabled(False) - self.textEdit.copyAvailable.connect(self.cutAct.setEnabled) - self.textEdit.copyAvailable.connect(self.copyAct.setEnabled) - - 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.fileMenu.addSeparator() - self.fileMenu.addAction(self.exitAct) - - self.editMenu = self.menuBar().addMenu("&Edit") - self.editMenu.addAction(self.cutAct) - self.editMenu.addAction(self.copyAct) - self.editMenu.addAction(self.pasteAct) + QMessageBox.about(self, "About Application", + "The <b>Application</b> example demonstrates how to write " + "modern GUI applications using Qt, with a menu bar, " + "toolbars, and a status bar.") + + @Slot() + def document_was_modified(self): + self.setWindowModified(self._text_edit.document().isModified()) + + def create_actions(self): + icon = QIcon.fromTheme(QIcon.ThemeIcon.DocumentNew, QIcon(':/images/new.png')) + self._new_act = QAction(icon, "&New", self, shortcut=QKeySequence.New, + statusTip="Create a new file", triggered=self.new_file) + + icon = QIcon.fromTheme(QIcon.ThemeIcon.DocumentOpen, QIcon(':/images/open.png')) + self._open_act = QAction(icon, "&Open...", self, + shortcut=QKeySequence.Open, statusTip="Open an existing file", + triggered=self.open) + + icon = QIcon.fromTheme(QIcon.ThemeIcon.DocumentSave, QIcon(':/images/save.png')) + self._save_act = QAction(icon, "&Save", self, + shortcut=QKeySequence.Save, + statusTip="Save the document to disk", triggered=self.save) + + self._save_as_act = QAction("Save &As...", self, + shortcut=QKeySequence.SaveAs, + statusTip="Save the document under a new name", + triggered=self.save_as) + + icon = QIcon.fromTheme(QIcon.ThemeIcon.ApplicationExit) + self._exit_act = QAction(icon, "E&xit", self, shortcut="Ctrl+Q", + statusTip="Exit the application", triggered=self.close) + + icon = QIcon.fromTheme(QIcon.ThemeIcon.EditCut, QIcon(':/images/cut.png')) + self._cut_act = QAction(icon, "Cu&t", self, shortcut=QKeySequence.Cut, + statusTip="Cut the current selection's contents to the clipboard", + triggered=self._text_edit.cut) + + icon = QIcon.fromTheme(QIcon.ThemeIcon.EditCopy, QIcon(':/images/copy.png')) + self._copy_act = QAction(icon, "&Copy", + self, shortcut=QKeySequence.Copy, + statusTip="Copy the current selection's contents to the clipboard", + triggered=self._text_edit.copy) + + icon = QIcon.fromTheme(QIcon.ThemeIcon.EditPaste, QIcon(':/images/paste.png')) + self._paste_act = QAction(icon, "&Paste", + self, shortcut=QKeySequence.Paste, + statusTip="Paste the clipboard's contents into the current " + "selection", + triggered=self._text_edit.paste) + + icon = QIcon.fromTheme(QIcon.ThemeIcon.HelpAbout) + self._about_act = QAction(icon, "&About", self, + statusTip="Show the application's About box", + triggered=self.about) + + self._about_qt_act = QAction("About &Qt", self, + statusTip="Show the Qt library's About box", + triggered=qApp.aboutQt) # noqa: F821 + + self._cut_act.setEnabled(False) + self._copy_act.setEnabled(False) + self._text_edit.copyAvailable.connect(self._cut_act.setEnabled) + self._text_edit.copyAvailable.connect(self._copy_act.setEnabled) + + def create_menus(self): + self._file_menu = self.menuBar().addMenu("&File") + self._file_menu.addAction(self._new_act) + self._file_menu.addAction(self._open_act) + self._file_menu.addAction(self._save_act) + self._file_menu.addAction(self._save_as_act) + self._file_menu.addSeparator() + self._file_menu.addAction(self._exit_act) + + self._edit_menu = self.menuBar().addMenu("&Edit") + self._edit_menu.addAction(self._cut_act) + self._edit_menu.addAction(self._copy_act) + self._edit_menu.addAction(self._paste_act) self.menuBar().addSeparator() - self.helpMenu = self.menuBar().addMenu("&Help") - self.helpMenu.addAction(self.aboutAct) - self.helpMenu.addAction(self.aboutQtAct) + self._help_menu = self.menuBar().addMenu("&Help") + self._help_menu.addAction(self._about_act) + self._help_menu.addAction(self._about_qt_act) - def createToolBars(self): - self.fileToolBar = self.addToolBar("File") - self.fileToolBar.addAction(self.newAct) - self.fileToolBar.addAction(self.openAct) - self.fileToolBar.addAction(self.saveAct) + def create_tool_bars(self): + self._file_tool_bar = self.addToolBar("File") + self._file_tool_bar.addAction(self._new_act) + self._file_tool_bar.addAction(self._open_act) + self._file_tool_bar.addAction(self._save_act) - self.editToolBar = self.addToolBar("Edit") - self.editToolBar.addAction(self.cutAct) - self.editToolBar.addAction(self.copyAct) - self.editToolBar.addAction(self.pasteAct) + self._edit_tool_bar = self.addToolBar("Edit") + self._edit_tool_bar.addAction(self._cut_act) + self._edit_tool_bar.addAction(self._copy_act) + self._edit_tool_bar.addAction(self._paste_act) - def createStatusBar(self): + def create_status_bar(self): self.statusBar().showMessage("Ready") - def readSettings(self): - settings = QtCore.QSettings("Trolltech", "Application Example") - pos = settings.value("pos", QtCore.QPoint(200, 200)) - size = settings.value("size", QtCore.QSize(400, 400)) - self.resize(size) - self.move(pos) - - def writeSettings(self): - settings = QtCore.QSettings("Trolltech", "Application Example") - settings.setValue("pos", self.pos()) - settings.setValue("size", self.size()) - - def maybeSave(self): - if self.textEdit.document().isModified(): - ret = QtWidgets.QMessageBox.warning(self, "Application", - "The document has been modified.\nDo you want to save " - "your changes?", - QtWidgets.QMessageBox.Save | QtWidgets.QMessageBox.Discard | - QtWidgets.QMessageBox.Cancel) - if ret == QtWidgets.QMessageBox.Save: + def read_settings(self): + settings = QSettings('QtProject', 'Application Example') + geometry = settings.value('geometry', QByteArray()) + if geometry.size(): + self.restoreGeometry(geometry) + + def write_settings(self): + settings = QSettings('QtProject', 'Application Example') + settings.setValue('geometry', self.saveGeometry()) + + def maybe_save(self): + if self._text_edit.document().isModified(): + ret = QMessageBox.warning(self, "Application", + "The document has been modified.\nDo you want to save " + "your changes?", + QMessageBox.Save | QMessageBox.Discard | QMessageBox.Cancel) + if ret == QMessageBox.Save: return self.save() - elif ret == QtWidgets.QMessageBox.Cancel: + elif ret == QMessageBox.Cancel: return False return True - def loadFile(self, fileName): - file = QtCore.QFile(fileName) - if not file.open(QtCore.QFile.ReadOnly | QtCore.QFile.Text): - QtWidgets.QMessageBox.warning(self, "Application", - "Cannot read file %s:\n%s." % (fileName, file.errorString())) + def load_file(self, fileName): + file = QFile(fileName) + if not file.open(QFile.ReadOnly | QFile.Text): + reason = file.errorString() + QMessageBox.warning(self, "Application", f"Cannot read file {fileName}:\n{reason}.") return - inf = QtCore.QTextStream(file) - QtWidgets.QApplication.setOverrideCursor(QtCore.Qt.WaitCursor) - self.textEdit.setPlainText(inf.readAll()) - QtWidgets.QApplication.restoreOverrideCursor() + inf = QTextStream(file) + with QApplication.setOverrideCursor(Qt.WaitCursor): + self._text_edit.setPlainText(inf.readAll()) - self.setCurrentFile(fileName) + self.set_current_file(fileName) self.statusBar().showMessage("File loaded", 2000) - def saveFile(self, fileName): + def save_file(self, fileName): error = None - QtWidgets.QApplication.setOverrideCursor(QtCore.Qt.WaitCursor) - file = QtCore.QSaveFile(fileName) - if file.open(QtCore.QFile.WriteOnly | QtCore.QFile.Text): - outf = QtCore.QTextStream(file) - outf << self.textEdit.toPlainText() - if not file.commit(): - error = "Cannot write file %s:\n%s." % (fileName, file.errorString()) - else: - error = "Cannot open file %s:\n%s." % (fileName, file.errorString()) - QtWidgets.QApplication.restoreOverrideCursor() + with QApplication.setOverrideCursor(Qt.WaitCursor): + file = QSaveFile(fileName) + if file.open(QFile.WriteOnly | QFile.Text): + outf = QTextStream(file) + outf << self._text_edit.toPlainText() + if not file.commit(): + reason = file.errorString() + error = f"Cannot write file {fileName}:\n{reason}." + else: + reason = file.errorString() + error = f"Cannot open file {fileName}:\n{reason}." if error: - QtWidgets.QMessageBox.warning(self, "Application", error) + QMessageBox.warning(self, "Application", error) return False - self.setCurrentFile(fileName) + self.set_current_file(fileName) self.statusBar().showMessage("File saved", 2000) return True - def setCurrentFile(self, fileName): - self.curFile = fileName - self.textEdit.document().setModified(False) + def set_current_file(self, fileName): + self._cur_file = fileName + self._text_edit.document().setModified(False) self.setWindowModified(False) - if self.curFile: - shownName = self.strippedName(self.curFile) + if self._cur_file: + shown_name = self.stripped_name(self._cur_file) else: - shownName = 'untitled.txt' + shown_name = 'untitled.txt' - self.setWindowTitle("%s[*] - Application" % shownName) + self.setWindowTitle(f"{shown_name}[*] - Application") - def strippedName(self, fullFileName): - return QtCore.QFileInfo(fullFileName).fileName() + def stripped_name(self, fullFileName): + return QFileInfo(fullFileName).fileName() if __name__ == '__main__': - - import sys - - app = QtWidgets.QApplication(sys.argv) - mainWin = MainWindow() - mainWin.show() - sys.exit(app.exec_()) + argument_parser = ArgumentParser(description='Application Example', + formatter_class=RawTextHelpFormatter) + argument_parser.add_argument("file", help="File", + nargs='?', type=str) + options = argument_parser.parse_args() + + app = QApplication(sys.argv) + main_win = MainWindow() + if options.file: + main_win.load_file(options.file) + main_win.show() + sys.exit(app.exec()) |