qt 6.5.1 original

examples/widgets/mainwindows/application/CMakeLists.txt

@@ -0,0 +1,54 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(application LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/mainwindows/application")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(application
+    main.cpp
+    mainwindow.cpp mainwindow.h
+)
+
+set_target_properties(application PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(application PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+# Resources:
+set(application_resource_files
+    "images/copy.png"
+    "images/cut.png"
+    "images/new.png"
+    "images/open.png"
+    "images/paste.png"
+    "images/save.png"
+)
+
+qt_add_resources(application "application"
+    PREFIX
+        "/"
+    FILES
+        ${application_resource_files}
+)
+
+install(TARGETS application
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/mainwindows/application/application.pro

@@ -0,0 +1,13 @@
+QT += widgets
+requires(qtConfig(filedialog))
+
+HEADERS       = mainwindow.h
+SOURCES       = main.cpp \
+                mainwindow.cpp
+#! [0]
+RESOURCES     = application.qrc
+#! [0]
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/mainwindows/application
+INSTALLS += target

examples/widgets/mainwindows/application/application.qrc

@@ -0,0 +1,10 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>images/copy.png</file>
+    <file>images/cut.png</file>
+    <file>images/new.png</file>
+    <file>images/open.png</file>
+    <file>images/paste.png</file>
+    <file>images/save.png</file>
+</qresource>
+</RCC>

examples/widgets/mainwindows/application/main.cpp

@@ -0,0 +1,32 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+//! [0]
+#include <QApplication>
+#include <QCommandLineParser>
+#include <QCommandLineOption>
+
+#include "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    Q_INIT_RESOURCE(application);
+
+    QApplication app(argc, argv);
+    QCoreApplication::setOrganizationName("QtProject");
+    QCoreApplication::setApplicationName("Application Example");
+    QCoreApplication::setApplicationVersion(QT_VERSION_STR);
+    QCommandLineParser parser;
+    parser.setApplicationDescription(QCoreApplication::applicationName());
+    parser.addHelpOption();
+    parser.addVersionOption();
+    parser.addPositionalArgument("file", "The file to open.");
+    parser.process(app);
+
+    MainWindow mainWin;
+    if (!parser.positionalArguments().isEmpty())
+        mainWin.loadFile(parser.positionalArguments().first());
+    mainWin.show();
+    return app.exec();
+}
+//! [0]

examples/widgets/mainwindows/application/mainwindow.cpp

@@ -0,0 +1,370 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+//! [0]
+#include <QtWidgets>
+
+#include "mainwindow.h"
+//! [0]
+
+//! [1]
+MainWindow::MainWindow()
+    : textEdit(new QPlainTextEdit)
+//! [1] //! [2]
+{
+    setCentralWidget(textEdit);
+
+    createActions();
+    createStatusBar();
+
+    readSettings();
+
+    connect(textEdit->document(), &QTextDocument::contentsChanged,
+            this, &MainWindow::documentWasModified);
+
+#ifndef QT_NO_SESSIONMANAGER
+    connect(qApp, &QGuiApplication::commitDataRequest,
+            this, &MainWindow::commitData);
+#endif
+
+    setCurrentFile(QString());
+    setUnifiedTitleAndToolBarOnMac(true);
+}
+//! [2]
+
+//! [3]
+void MainWindow::closeEvent(QCloseEvent *event)
+//! [3] //! [4]
+{
+    if (maybeSave()) {
+        writeSettings();
+        event->accept();
+    } else {
+        event->ignore();
+    }
+}
+//! [4]
+
+//! [5]
+void MainWindow::newFile()
+//! [5] //! [6]
+{
+    if (maybeSave()) {
+        textEdit->clear();
+        setCurrentFile(QString());
+    }
+}
+//! [6]
+
+//! [7]
+void MainWindow::open()
+//! [7] //! [8]
+{
+    if (maybeSave()) {
+        QString fileName = QFileDialog::getOpenFileName(this);
+        if (!fileName.isEmpty())
+            loadFile(fileName);
+    }
+}
+//! [8]
+
+//! [9]
+bool MainWindow::save()
+//! [9] //! [10]
+{
+    if (curFile.isEmpty()) {
+        return saveAs();
+    } else {
+        return saveFile(curFile);
+    }
+}
+//! [10]
+
+//! [11]
+bool MainWindow::saveAs()
+//! [11] //! [12]
+{
+    QFileDialog dialog(this);
+    dialog.setWindowModality(Qt::WindowModal);
+    dialog.setAcceptMode(QFileDialog::AcceptSave);
+    if (dialog.exec() != QDialog::Accepted)
+        return false;
+    return saveFile(dialog.selectedFiles().first());
+}
+//! [12]
+
+//! [13]
+void MainWindow::about()
+//! [13] //! [14]
+{
+   QMessageBox::about(this, 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]
+void MainWindow::documentWasModified()
+//! [15] //! [16]
+{
+    setWindowModified(textEdit->document()->isModified());
+}
+//! [16]
+
+//! [17]
+void MainWindow::createActions()
+//! [17] //! [18]
+{
+
+    QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
+    QToolBar *fileToolBar = addToolBar(tr("File"));
+    const QIcon newIcon = QIcon::fromTheme("document-new", QIcon(":/images/new.png"));
+    QAction *newAct = new QAction(newIcon, tr("&New"), this);
+    newAct->setShortcuts(QKeySequence::New);
+    newAct->setStatusTip(tr("Create a new file"));
+    connect(newAct, &QAction::triggered, this, &MainWindow::newFile);
+    fileMenu->addAction(newAct);
+    fileToolBar->addAction(newAct);
+
+//! [19]
+    const QIcon openIcon = QIcon::fromTheme("document-open", QIcon(":/images/open.png"));
+    QAction *openAct = new QAction(openIcon, tr("&Open..."), this);
+    openAct->setShortcuts(QKeySequence::Open);
+    openAct->setStatusTip(tr("Open an existing file"));
+    connect(openAct, &QAction::triggered, this, &MainWindow::open);
+    fileMenu->addAction(openAct);
+    fileToolBar->addAction(openAct);
+//! [18] //! [19]
+
+    const QIcon saveIcon = QIcon::fromTheme("document-save", QIcon(":/images/save.png"));
+    QAction *saveAct = new QAction(saveIcon, tr("&Save"), this);
+    saveAct->setShortcuts(QKeySequence::Save);
+    saveAct->setStatusTip(tr("Save the document to disk"));
+    connect(saveAct, &QAction::triggered, this, &MainWindow::save);
+    fileMenu->addAction(saveAct);
+    fileToolBar->addAction(saveAct);
+
+    const QIcon saveAsIcon = QIcon::fromTheme("document-save-as");
+    QAction *saveAsAct = fileMenu->addAction(saveAsIcon, tr("Save &As..."), this, &MainWindow::saveAs);
+    saveAsAct->setShortcuts(QKeySequence::SaveAs);
+    saveAsAct->setStatusTip(tr("Save the document under a new name"));
+
+//! [20]
+
+    fileMenu->addSeparator();
+
+    const QIcon exitIcon = QIcon::fromTheme("application-exit");
+    QAction *exitAct = fileMenu->addAction(exitIcon, tr("E&xit"), this, &QWidget::close);
+    exitAct->setShortcuts(QKeySequence::Quit);
+//! [20]
+    exitAct->setStatusTip(tr("Exit the application"));
+
+//! [21]
+    QMenu *editMenu = menuBar()->addMenu(tr("&Edit"));
+    QToolBar *editToolBar = addToolBar(tr("Edit"));
+//!
+#ifndef QT_NO_CLIPBOARD
+    const QIcon cutIcon = QIcon::fromTheme("edit-cut", QIcon(":/images/cut.png"));
+    QAction *cutAct = new QAction(cutIcon, tr("Cu&t"), this);
+//! [21]
+    cutAct->setShortcuts(QKeySequence::Cut);
+    cutAct->setStatusTip(tr("Cut the current selection's contents to the "
+                            "clipboard"));
+    connect(cutAct, &QAction::triggered, textEdit, &QPlainTextEdit::cut);
+    editMenu->addAction(cutAct);
+    editToolBar->addAction(cutAct);
+
+    const QIcon copyIcon = QIcon::fromTheme("edit-copy", QIcon(":/images/copy.png"));
+    QAction *copyAct = new QAction(copyIcon, tr("&Copy"), this);
+    copyAct->setShortcuts(QKeySequence::Copy);
+    copyAct->setStatusTip(tr("Copy the current selection's contents to the "
+                             "clipboard"));
+    connect(copyAct, &QAction::triggered, textEdit, &QPlainTextEdit::copy);
+    editMenu->addAction(copyAct);
+    editToolBar->addAction(copyAct);
+
+    const QIcon pasteIcon = QIcon::fromTheme("edit-paste", QIcon(":/images/paste.png"));
+    QAction *pasteAct = new QAction(pasteIcon, tr("&Paste"), this);
+    pasteAct->setShortcuts(QKeySequence::Paste);
+    pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
+                              "selection"));
+    connect(pasteAct, &QAction::triggered, textEdit, &QPlainTextEdit::paste);
+    editMenu->addAction(pasteAct);
+    editToolBar->addAction(pasteAct);
+
+    menuBar()->addSeparator();
+
+#endif // !QT_NO_CLIPBOARD
+
+    QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
+    QAction *aboutAct = helpMenu->addAction(tr("&About"), this, &MainWindow::about);
+    aboutAct->setStatusTip(tr("Show the application's About box"));
+
+//! [22]
+
+    QAction *aboutQtAct = helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
+    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+//! [22]
+
+//! [23]
+#ifndef QT_NO_CLIPBOARD
+    cutAct->setEnabled(false);
+//! [23] //! [24]
+    copyAct->setEnabled(false);
+    connect(textEdit, &QPlainTextEdit::copyAvailable, cutAct, &QAction::setEnabled);
+    connect(textEdit, &QPlainTextEdit::copyAvailable, copyAct, &QAction::setEnabled);
+#endif // !QT_NO_CLIPBOARD
+}
+//! [24]
+
+//! [32]
+void MainWindow::createStatusBar()
+//! [32] //! [33]
+{
+    statusBar()->showMessage(tr("Ready"));
+}
+//! [33]
+
+//! [34] //! [35]
+void MainWindow::readSettings()
+//! [34] //! [36]
+{
+    QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+    const QByteArray geometry = settings.value("geometry", QByteArray()).toByteArray();
+    if (geometry.isEmpty()) {
+        const QRect availableGeometry = screen()->availableGeometry();
+        resize(availableGeometry.width() / 3, availableGeometry.height() / 2);
+        move((availableGeometry.width() - width()) / 2,
+             (availableGeometry.height() - height()) / 2);
+    } else {
+        restoreGeometry(geometry);
+    }
+}
+//! [35] //! [36]
+
+//! [37] //! [38]
+void MainWindow::writeSettings()
+//! [37] //! [39]
+{
+    QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+    settings.setValue("geometry", saveGeometry());
+}
+//! [38] //! [39]
+
+//! [40]
+bool MainWindow::maybeSave()
+//! [40] //! [41]
+{
+    if (!textEdit->document()->isModified())
+        return true;
+    const QMessageBox::StandardButton ret
+        = QMessageBox::warning(this, tr("Application"),
+                               tr("The document has been modified.\n"
+                                  "Do you want to save your changes?"),
+                               QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
+    switch (ret) {
+    case QMessageBox::Save:
+        return save();
+    case QMessageBox::Cancel:
+        return false;
+    default:
+        break;
+    }
+    return true;
+}
+//! [41]
+
+//! [42]
+void MainWindow::loadFile(const QString &fileName)
+//! [42] //! [43]
+{
+    QFile file(fileName);
+    if (!file.open(QFile::ReadOnly | QFile::Text)) {
+        QMessageBox::warning(this, tr("Application"),
+                             tr("Cannot read file %1:\n%2.")
+                             .arg(QDir::toNativeSeparators(fileName), file.errorString()));
+        return;
+    }
+
+    QTextStream in(&file);
+#ifndef QT_NO_CURSOR
+    QGuiApplication::setOverrideCursor(Qt::WaitCursor);
+#endif
+    textEdit->setPlainText(in.readAll());
+#ifndef QT_NO_CURSOR
+    QGuiApplication::restoreOverrideCursor();
+#endif
+
+    setCurrentFile(fileName);
+    statusBar()->showMessage(tr("File loaded"), 2000);
+}
+//! [43]
+
+//! [44]
+bool MainWindow::saveFile(const QString &fileName)
+//! [44] //! [45]
+{
+    QString errorMessage;
+
+    QGuiApplication::setOverrideCursor(Qt::WaitCursor);
+    QSaveFile file(fileName);
+    if (file.open(QFile::WriteOnly | QFile::Text)) {
+        QTextStream out(&file);
+        out << textEdit->toPlainText();
+        if (!file.commit()) {
+            errorMessage = tr("Cannot write file %1:\n%2.")
+                           .arg(QDir::toNativeSeparators(fileName), file.errorString());
+        }
+    } else {
+        errorMessage = tr("Cannot open file %1 for writing:\n%2.")
+                       .arg(QDir::toNativeSeparators(fileName), file.errorString());
+    }
+    QGuiApplication::restoreOverrideCursor();
+
+    if (!errorMessage.isEmpty()) {
+        QMessageBox::warning(this, tr("Application"), errorMessage);
+        return false;
+    }
+
+    setCurrentFile(fileName);
+    statusBar()->showMessage(tr("File saved"), 2000);
+    return true;
+}
+//! [45]
+
+//! [46]
+void MainWindow::setCurrentFile(const QString &fileName)
+//! [46] //! [47]
+{
+    curFile = fileName;
+    textEdit->document()->setModified(false);
+    setWindowModified(false);
+
+    QString shownName = curFile;
+    if (curFile.isEmpty())
+        shownName = "untitled.txt";
+    setWindowFilePath(shownName);
+}
+//! [47]
+
+//! [48]
+QString MainWindow::strippedName(const QString &fullFileName)
+//! [48] //! [49]
+{
+    return QFileInfo(fullFileName).fileName();
+}
+//! [49]
+#ifndef QT_NO_SESSIONMANAGER
+void MainWindow::commitData(QSessionManager &manager)
+{
+    if (manager.allowsInteraction()) {
+        if (!maybeSave())
+            manager.cancel();
+    } else {
+        // Non-interactive: save without asking
+        if (textEdit->document()->isModified())
+            save();
+    }
+}
+#endif

examples/widgets/mainwindows/application/mainwindow.h

@@ -0,0 +1,55 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QMenu;
+class QPlainTextEdit;
+class QSessionManager;
+QT_END_NAMESPACE
+
+//! [0]
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+    void loadFile(const QString &fileName);
+
+protected:
+    void closeEvent(QCloseEvent *event) override;
+
+private slots:
+    void newFile();
+    void open();
+    bool save();
+    bool saveAs();
+    void about();
+    void documentWasModified();
+#ifndef QT_NO_SESSIONMANAGER
+    void commitData(QSessionManager &);
+#endif
+
+private:
+    void createActions();
+    void createStatusBar();
+    void readSettings();
+    void writeSettings();
+    bool maybeSave();
+    bool saveFile(const QString &fileName);
+    void setCurrentFile(const QString &fileName);
+    QString strippedName(const QString &fullFileName);
+
+    QPlainTextEdit *textEdit;
+    QString curFile;
+};
+//! [0]
+
+#endif