|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# mainwindow.cpp Example File
painting/svgviewer/mainwindow.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License versions 2.0 or 3.0 as published by the Free Software
     ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
     ** included in the packaging of this file.  Alternatively you may (at
     ** your option) use any later version of the GNU General Public
     ** License if such license has been publicly approved by Trolltech ASA
     ** (or its successors, if any) and the KDE Free Qt Foundation. In
     ** addition, as a special exception, Trolltech gives you certain
     ** additional rights. These rights are described in the Trolltech GPL
     ** Exception version 1.2, which can be found at
     ** http://www.trolltech.com/products/qt/gplexception/ and in the file
     ** GPL_EXCEPTION.txt in this package.
     **
     ** Please review the following information to ensure GNU General
     ** Public Licensing requirements will be met:
     ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
     ** you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
     ** or contact the sales department at sales@trolltech.com.
     **
     ** In addition, as a special exception, Trolltech, as the sole
     ** copyright holder for Qt Designer, grants users of the Qt/Eclipse
     ** Integration plug-in the right for the Qt/Eclipse Integration to
     ** link to functionality provided by Qt Designer and its related
     ** libraries.
     **
     ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
     ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
     ** granted herein.
     **
     ** 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 "mainwindow.h"

     MainWindow::MainWindow()
         : QMainWindow()
     {
         area = new SvgWindow;

         QMenu *fileMenu = new QMenu(tr("&File"), this);
         QAction *openAction = fileMenu->addAction(tr("&Open..."));
         openAction->setShortcut(QKeySequence(tr("Ctrl+O")));
         QAction *quitAction = fileMenu->addAction(tr("E&xit"));
         quitAction->setShortcut(QKeySequence(tr("Ctrl+Q")));

         menuBar()->addMenu(fileMenu);

         QMenu *rendererMenu = new QMenu(tr("&Renderer"), this);
         nativeAction = rendererMenu->addAction(tr("&Native"));
         nativeAction->setCheckable(true);
         nativeAction->setChecked(true);
         #ifndef QT_NO_OPENGL
         glAction = rendererMenu->addAction(tr("&OpenGL"));
         glAction->setCheckable(true);
         #endif
         imageAction = rendererMenu->addAction(tr("&Image"));
         imageAction->setCheckable(true);

         #ifndef QT_NO_OPENGL
         rendererMenu->addSeparator();
         highQualityAntialiasingAction = rendererMenu->addAction(tr("&High Quality Antialiasing"));
         highQualityAntialiasingAction->setEnabled(false);
         highQualityAntialiasingAction->setCheckable(true);
         highQualityAntialiasingAction->setChecked(false);
         connect(highQualityAntialiasingAction, SIGNAL(toggled(bool)), this, SLOT(setHighQualityAntialiasing(bool)));
         #endif

         QActionGroup *rendererGroup = new QActionGroup(this);
         rendererGroup->addAction(nativeAction);
         #ifndef QT_NO_OPENGL
         rendererGroup->addAction(glAction);
         #endif
         rendererGroup->addAction(imageAction);

         menuBar()->addMenu(rendererMenu);

         connect(openAction, SIGNAL(triggered()), this, SLOT(openFile()));
         connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
         connect(rendererGroup, SIGNAL(triggered(QAction *)),
                 this, SLOT(setRenderer(QAction *)));

         setCentralWidget(area);
         setWindowTitle(tr("SVG Viewer"));
     }

     void MainWindow::setHighQualityAntialiasing(bool highQualityAntialiasing)
     {
         area->setHighQualityAntialiasing(highQualityAntialiasing);
     }

     void MainWindow::openFile(const QString &path)
     {
         QString fileName;
         if (path.isNull())
             fileName = QFileDialog::getOpenFileName(this, tr("Open SVG File"),
                                                     currentPath, "*.svg");
         else
             fileName = path;

         if (!fileName.isEmpty()) {
             area->openFile(fileName);
             if (!fileName.startsWith(":/")) {
                 currentPath = fileName;
                 setWindowTitle(tr("%1 - SVGViewer").arg(currentPath));
             }
         }
     }

     void MainWindow::setRenderer(QAction *action)
     {
         #ifndef QT_NO_OPENGL
         highQualityAntialiasingAction->setEnabled(false);
         #endif

         if (action == nativeAction)
             area->setRenderer(SvgWindow::Native);
         #ifndef QT_NO_OPENGL
         else if (action == glAction) {
             area->setRenderer(SvgWindow::OpenGL);
             highQualityAntialiasingAction->setEnabled(true);
         }
         #endif
         else if (action == imageAction)
             area->setRenderer(SvgWindow::Image);
     }