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

        /****************************************************************************
        **
        ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the example classes of the Qt Toolkit.
        **
        ** Licensees holding valid Qt Preview licenses may use this file in
        ** accordance with the Qt Preview License Agreement provided with the
        ** Software.
        **
        ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
        ** information about Qt Commercial License Agreements.
        **
        ** Contact info@trolltech.com if any conditions of this licensing are
        ** not clear to you.
        **
        ** 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 "svgview.h"
        #include "svgwindow.h"

        SvgWindow::SvgWindow()
            : QScrollArea()
        {
            QWidget *view = new QWidget(this);
            renderer = SvgWindow::Native;
            setWidget(view);
        }

        void SvgWindow::openFile(const QString &file)
        {
            currentPath = file;
            setRenderer(renderer);
        }

        void SvgWindow::setRenderer(RendererType type)
        {
            renderer = type;
            QWidget *view;

            if (renderer == OpenGL) {
                #ifndef QT_NO_OPENGL
                view = new SvgGLView(currentPath, this);
                #endif
            } else if (renderer == Image)
                view = new SvgRasterView(currentPath, this);
            else
                view = new SvgNativeView(currentPath, this);

            setWidget(view);
            view->show();
        }

        void SvgWindow::mousePressEvent(QMouseEvent *event)
        {
            mousePressPos = event->pos();
            scrollBarValuesOnMousePress.rx() = horizontalScrollBar()->value();
            scrollBarValuesOnMousePress.ry() = verticalScrollBar()->value();
            event->accept();
        }

        void SvgWindow::mouseMoveEvent(QMouseEvent *event)
        {
            if (mousePressPos.isNull()) {
                event->ignore();
                return;
            }

            horizontalScrollBar()->setValue(scrollBarValuesOnMousePress.x() - event->pos().x() + mousePressPos.x());
            verticalScrollBar()->setValue(scrollBarValuesOnMousePress.y() - event->pos().y() + mousePressPos.y());
            horizontalScrollBar()->update();
            verticalScrollBar()->update();
            event->accept();
        }

        void SvgWindow::mouseReleaseEvent(QMouseEvent *event)
        {
            mousePressPos = QPoint();
            event->accept();
        }