mainwindow.cpp Example File

tools/settingseditor/mainwindow.cpp 
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 #include <QtWidgets>

 #include "locationdialog.h"
 #include "mainwindow.h"
 #include "settingstree.h"

 MainWindow::MainWindow()
     : settingsTree(new SettingsTree)
     , locationDialog(nullptr)
 {
     setCentralWidget(settingsTree);

     createActions();

     autoRefreshAct->setChecked(true);
     fallbacksAct->setChecked(true);

     setWindowTitle(QCoreApplication::applicationName());
     const QRect availableGeometry = QApplication::desktop()->availableGeometry(this);
     adjustSize();
     move((availableGeometry.width() - width()) / 2, (availableGeometry.height() - height()) / 2);
 }

 void MainWindow::openSettings()
 {
     if (!locationDialog)
         locationDialog = new LocationDialog(this);

     if (locationDialog->exec() != QDialog::Accepted)
         return;

     SettingsPtr settings(new QSettings(locationDialog->format(),
                                        locationDialog->scope(),
                                        locationDialog->organization(),
                                        locationDialog->application()));

     setSettingsObject(settings);
     fallbacksAct->setEnabled(true);
 }

 void MainWindow::openIniFile()
 {
     const QString directory = QStandardPaths::writableLocation(QStandardPaths::ConfigLocation);
     const QString fileName =
         QFileDialog::getOpenFileName(this, tr("Open INI File"),
                                      directory, tr("INI Files (*.ini *.conf)"));
     if (fileName.isEmpty())
         return;

     SettingsPtr settings(new QSettings(fileName, QSettings::IniFormat));

     setSettingsObject(settings);
     fallbacksAct->setEnabled(false);
 }

 void MainWindow::openPropertyList()
 {
     const QString directory = QStandardPaths::writableLocation(QStandardPaths::ConfigLocation);
     const QString fileName =
         QFileDialog::getOpenFileName(this, tr("Open Property List"),
                                      directory, tr("Property List Files (*.plist)"));
     if (fileName.isEmpty())
         return;

     SettingsPtr settings(new QSettings(fileName, QSettings::NativeFormat));
     setSettingsObject(settings);
     fallbacksAct->setEnabled(false);
 }

 void MainWindow::openRegistryPath()
 {
     const QString path =
         QInputDialog::getText(this, tr("Open Registry Path"),
                               tr("Enter the path in the Windows registry:"),
                               QLineEdit::Normal, "HKEY_CURRENT_USER\\");
     if (path.isEmpty())
         return;

     SettingsPtr settings(new QSettings(path, QSettings::NativeFormat));

     setSettingsObject(settings);
     fallbacksAct->setEnabled(false);
 }

 void MainWindow::about()
 {
     QMessageBox::about(this, tr("About Settings Editor"),
             tr("The <b>Settings Editor</b> example shows how to access "
                "application settings using Qt."));
 }

 void MainWindow::createActions()
 {
     QMenu *fileMenu = menuBar()->addMenu(tr("&File"));

     QAction *openSettingsAct = fileMenu->addAction(tr("&Open Application Settings..."), this, &MainWindow::openSettings);
     openSettingsAct->setShortcuts(QKeySequence::Open);

     QAction *openIniFileAct = fileMenu->addAction(tr("Open I&NI File..."), this, &MainWindow::openIniFile);
     openIniFileAct->setShortcut(tr("Ctrl+N"));

 #ifdef Q_OS_OSX
     QAction *openPropertyListAct = fileMenu->addAction(tr("Open Apple &Property List..."), this, &MainWindow::openPropertyList);
     openPropertyListAct->setShortcut(tr("Ctrl+P"));
 #endif // Q_OS_OSX

 #ifdef Q_OS_WIN
     QAction *openRegistryPathAct = fileMenu->addAction(tr("Open Windows &Registry Path..."), this, &MainWindow::openRegistryPath);
     openRegistryPathAct->setShortcut(tr("Ctrl+G"));
 #endif // Q_OS_WIN

     fileMenu->addSeparator();

     refreshAct = fileMenu->addAction(tr("&Refresh"), settingsTree, &SettingsTree::refresh);
     refreshAct->setShortcut(tr("Ctrl+R"));
     refreshAct->setEnabled(false);

     fileMenu->addSeparator();

     QAction *exitAct = fileMenu->addAction(tr("E&xit"), this, &QWidget::close);
     exitAct->setShortcuts(QKeySequence::Quit);

     QMenu *optionsMenu = menuBar()->addMenu(tr("&Options"));

     autoRefreshAct = optionsMenu->addAction(tr("&Auto-Refresh"));
     autoRefreshAct->setShortcut(tr("Ctrl+A"));
     autoRefreshAct->setCheckable(true);
     autoRefreshAct->setEnabled(false);
     connect(autoRefreshAct, &QAction::triggered,
             settingsTree, &SettingsTree::setAutoRefresh);
     connect(autoRefreshAct, &QAction::triggered,
             refreshAct, &QAction::setDisabled);

     fallbacksAct = optionsMenu->addAction(tr("&Fallbacks"));
     fallbacksAct->setShortcut(tr("Ctrl+F"));
     fallbacksAct->setCheckable(true);
     fallbacksAct->setEnabled(false);
     connect(fallbacksAct, &QAction::triggered,
             settingsTree, &SettingsTree::setFallbacksEnabled);

     QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
     helpMenu->addAction(tr("&About"), this, &MainWindow::about);
     helpMenu->addAction(tr("About &Qt"), qApp, &QCoreApplication::quit);
 }

 void MainWindow::setSettingsObject(const SettingsPtr &settings)
 {
     settings->setFallbacksEnabled(fallbacksAct->isChecked());
     settingsTree->setSettingsObject(settings);

     refreshAct->setEnabled(true);
     autoRefreshAct->setEnabled(true);

     QString niceName = QDir::cleanPath(settings->fileName());
     int pos = niceName.lastIndexOf(QLatin1Char('/'));
     if (pos != -1)
         niceName.remove(0, pos + 1);

     if (!settings->isWritable())
         niceName = tr("%1 (read only)").arg(niceName);

     setWindowTitle(tr("%1 - %2").arg(niceName, QCoreApplication::applicationName()));
     statusBar()->showMessage(tr("Opened \"%1\"").arg(QDir::toNativeSeparators(settings->fileName())));
 }

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