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# mainwindow.cpp Example File
tools/settingseditor/mainwindow.cpp

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     #include <QtGui>

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

     MainWindow::MainWindow()
     {
         settingsTree = new SettingsTree;
         setCentralWidget(settingsTree);

         locationDialog = 0;

         createActions();
         createMenus();

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

         setWindowTitle(tr("Settings Editor"));
         resize(500, 600);
     }

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

         if (locationDialog->exec()) {
             QSettings *settings = new QSettings(locationDialog->format(),
                                                 locationDialog->scope(),
                                                 locationDialog->organization(),
                                                 locationDialog->application());
             setSettingsObject(settings);
             fallbacksAct->setEnabled(true);
         }
     }

     void MainWindow::openIniFile()
     {
         QString fileName = QFileDialog::getOpenFileName(this, tr("Open INI File"),
                                    "", tr("INI Files (*.ini *.conf)"));
         if (!fileName.isEmpty()) {
             QSettings *settings = new QSettings(fileName, QSettings::IniFormat);
             setSettingsObject(settings);
             fallbacksAct->setEnabled(false);
         }
     }

     void MainWindow::openPropertyList()
     {
         QString fileName = QFileDialog::getOpenFileName(this,
                                    tr("Open Property List"),
                                    "", tr("Property List Files (*.plist)"));
         if (!fileName.isEmpty()) {
             QSettings *settings = new QSettings(fileName, QSettings::NativeFormat);
             setSettingsObject(settings);
             fallbacksAct->setEnabled(false);
         }
     }

     void MainWindow::openRegistryPath()
     {
         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()) {
             QSettings *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()
     {
         openSettingsAct = new QAction(tr("&Open Application Settings..."), this);
         openSettingsAct->setShortcut(tr("Ctrl+O"));
         connect(openSettingsAct, SIGNAL(triggered()), this, SLOT(openSettings()));

         openIniFileAct = new QAction(tr("Open I&NI File..."), this);
         openIniFileAct->setShortcut(tr("Ctrl+N"));
         connect(openIniFileAct, SIGNAL(triggered()), this, SLOT(openIniFile()));

         openPropertyListAct = new QAction(tr("Open Mac &Property List..."), this);
         openPropertyListAct->setShortcut(tr("Ctrl+P"));
         connect(openPropertyListAct, SIGNAL(triggered()),
                 this, SLOT(openPropertyList()));

         openRegistryPathAct = new QAction(tr("Open Windows &Registry Path..."),
                                           this);
         openRegistryPathAct->setShortcut(tr("Ctrl+G"));
         connect(openRegistryPathAct, SIGNAL(triggered()),
                 this, SLOT(openRegistryPath()));

         refreshAct = new QAction(tr("&Refresh"), this);
         refreshAct->setShortcut(tr("Ctrl+R"));
         refreshAct->setEnabled(false);
         connect(refreshAct, SIGNAL(triggered()), settingsTree, SLOT(refresh()));

         exitAct = new QAction(tr("E&xit"), this);
         exitAct->setShortcut(tr("Ctrl+Q"));
         connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));

         autoRefreshAct = new QAction(tr("&Auto-Refresh"), this);
         autoRefreshAct->setShortcut(tr("Ctrl+A"));
         autoRefreshAct->setCheckable(true);
         autoRefreshAct->setEnabled(false);
         connect(autoRefreshAct, SIGNAL(triggered(bool)),
                 settingsTree, SLOT(setAutoRefresh(bool)));
         connect(autoRefreshAct, SIGNAL(triggered(bool)),
                 refreshAct, SLOT(setDisabled(bool)));

         fallbacksAct = new QAction(tr("&Fallbacks"), this);
         fallbacksAct->setShortcut(tr("Ctrl+F"));
         fallbacksAct->setCheckable(true);
         fallbacksAct->setEnabled(false);
         connect(fallbacksAct, SIGNAL(triggered(bool)),
                 settingsTree, SLOT(setFallbacksEnabled(bool)));

         aboutAct = new QAction(tr("&About"), this);
         connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));

         aboutQtAct = new QAction(tr("About &Qt"), this);
         connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));

     #ifndef Q_WS_MAC
         openPropertyListAct->setEnabled(false);
     #endif
     #ifndef Q_WS_WIN
         openRegistryPathAct->setEnabled(false);
     #endif
     }

     void MainWindow::createMenus()
     {
         fileMenu = menuBar()->addMenu(tr("&File"));
         fileMenu->addAction(openSettingsAct);
         fileMenu->addAction(openIniFileAct);
         fileMenu->addAction(openPropertyListAct);
         fileMenu->addAction(openRegistryPathAct);
         fileMenu->addSeparator();
         fileMenu->addAction(refreshAct);
         fileMenu->addSeparator();
         fileMenu->addAction(exitAct);

         optionsMenu = menuBar()->addMenu(tr("&Options"));
         optionsMenu->addAction(autoRefreshAct);
         optionsMenu->addAction(fallbacksAct);

         menuBar()->addSeparator();

         helpMenu = menuBar()->addMenu(tr("&Help"));
         helpMenu->addAction(aboutAct);
         helpMenu->addAction(aboutQtAct);
     }

     void MainWindow::setSettingsObject(QSettings *settings)
     {
         settings->setFallbacksEnabled(fallbacksAct->isChecked());
         settingsTree->setSettingsObject(settings);

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

         QString niceName = settings->fileName();
         niceName.replace("\\", "/");
         int pos = niceName.lastIndexOf("/");
         if (pos != -1)
             niceName.remove(0, pos + 1);

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

         setWindowTitle(tr("%1 - %2").arg(niceName).arg(tr("Settings Editor")));
     }