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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();
    }