VRS - The Virtual Rendering System

version 3.3

qtcanvas.h

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/******************************************************************************
 * VRS - The Virtual Rendering System
 * Copyright (C) 2000-2008 Computer Graphics Systems Group at the 
 * Hasso-Plattner-Institute (HPI), Potsdam, Germany.
 *
 * This  library  is  free  software; you can redistribute it and/or  modify it
 * under the terms of the GNU Lesser General Public  License  as  published  by
 * the  Free  Software  Foundation;  either  version 2.1 of the License, or (at
 * your option) any later version. This library  is  distributed  in  the  hope
 * that  it will be useful, but  WITHOUT ANY WARRANTY; without even the implied
 * warranty of  MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE.  See  the
 * GNU Lesser General Public License for more details. You should have received
 * a copy of the GNU Lesser+ General Public License along with this library; if
 * not, write to the FreeSoftware Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA, 02111-1307, USA.
 ******************************************************************************/

#ifndef VRS_QT_QTCANVAS_H
#define VRS_QT_QTCANVAS_H

#include <vrs/qt3/config.h>
#include <vrs/opengl/glcanvas.h>
#include <qpopupmenu.h>
#include <qguardedptr.h>

#include <qgl.h>

namespace VRS {

    // forward declaration
    class VRS_QtCanvas;

    class VRS_QT3_API QtCanvas : public QGLWidget {
    public:
        QtCanvas(
            QWidget* parent = NULL, const std::string& name = std::string(),
            int properties = GLCanvas::RGBADDS,
            TechniqueProcessor* techniqueProcessor = NULL,
            QtCanvas* sharedCanvas = NULL,
            WFlags qtWFlags = 0
        );

        QtCanvas(
            unsigned int width, unsigned int height,
            QWidget* parent = NULL, const std::string& name = std::string(),
            int properties = GLCanvas::RGBADDS,
            TechniqueProcessor* techniqueProcessor = NULL,
            QtCanvas* sharedCanvas = NULL,
            WFlags qtWFlags = 0
        );

        virtual ~QtCanvas();

        GLCanvas* canvas() const { return canvas_; }

        static InputEvent::Modifier convertModifier(int qtState);
        static InputEvent::Button convertButton(int qtButton);
        static unsigned long convertKey(const QKeyEvent* qtKeyEvent);

        void setContextMenu(QPopupMenu*qmenu);

    protected:
        friend class VRS_QtCanvas;

        virtual void preRenderHook() { }

        virtual void postRenderHook() { }

        // methods from QGLWidget
        virtual void paintGL();
        virtual void resizeGL(int w, int h);
        virtual void initializeGL();

        // methods from QWidget
        virtual void showEvent(QShowEvent*);
        virtual void hideEvent(QHideEvent*);
        virtual void mousePressEvent(QMouseEvent*);
        virtual void mouseReleaseEvent(QMouseEvent*);
        virtual void wheelEvent(QWheelEvent*);
        virtual void mouseDoubleClickEvent(QMouseEvent*);
        virtual void mouseMoveEvent(QMouseEvent*);
        virtual void dragMoveEvent(QDragMoveEvent*);
        virtual void keyPressEvent(QKeyEvent*);
        virtual void keyReleaseEvent(QKeyEvent*);
        virtual void focusInEvent(QFocusEvent*);
        virtual void focusOutEvent(QFocusEvent*);
        virtual void enterEvent(QEvent*);
        virtual void leaveEvent(QEvent*);
        virtual void paintEvent(QPaintEvent*);
        virtual void resizeEvent(QResizeEvent*);
        virtual void contextMenuEvent(QContextMenuEvent* e);

        virtual void glDraw();

    private:
        SO<GLCanvas> canvas_;
        QGuardedPtr<QPopupMenu> contextMenu_;
        int lastX_;
        int lastY_;
    }; // class QtCanvas

} // namespace VRS

#endif // VRS_QT_QTCANVAS_H

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