mainwindow.cpp Example File

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  #include <QtWidgets>

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

  MainWindow::MainWindow()
      : settingsTree(new SettingsTree)
      , locationDialog(Q_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())));
  }