Qt 4.0: mainwindow.cpp Example File (tools/settingseditor/mainwindow.cpp)

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

        /****************************************************************************
        **
        ** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
    ** this file.  Please review the following information to ensure GNU
    ** General Public Licensing requirements will be met:
    ** http://www.trolltech.com/products/qt/opensource.html
    **
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://www.trolltech.com/products/qt/licensing.html or contact the
    ** sales department at sales@trolltech.com.
        **
        ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        **
        ****************************************************************************/

        #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")));
        }