/* ============================================================
 *
 * This file is a part of digiKam project
 * http://www.digikam.org
 *
 * Date        : 2008-08-20
 * Description : A widget stack to embed editor view.
 *
 * Copyright (C) 2008-2009 by Gilles Caulier <caulier dot gilles at gmail dot com>
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation;
 * either version 2, or (at your option)
 * any later version.
 *
 * This program 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 General Public License for more details.
 *
 * ============================================================ */

#ifndef EDITORSTACKVIEW_H
#define EDITORSTACKVIEW_H

// KDE includes.

#include <tqwidgetstack.h>

// Local includes.

#include "digikam_export.h"

namespace Digikam
{

class PreviewWidget;
class Canvas;
class EditorStackViewPriv;

class DIGIKAM_EXPORT EditorStackView : public TQWidgetStack
{
Q_OBJECT
  TQ_OBJECT

public:

    enum StackViewMode
    {
        CanvasMode=0,
        ToolViewMode
    };

public:

    EditorStackView(TQWidget *parent=0);
    ~EditorStackView();

    void setCanvas(Canvas* canvas);
    Canvas *canvas() const;

    void setToolView(TQWidget* view);
    TQWidget *toolView() const;

    int  viewMode();
    void setViewMode(int mode);

    void increaseZoom();
    void decreaseZoom();
    void toggleFitToWindow();
    void fitToSelect();
    void zoomTo100Percents();
    void setZoomFactor(double zoom);

    /** Two widgets are embedded in Editor Tool to perform preview with panning and zooming:
        a PreviewWidget derivated class or ImagePanelWidget. 
        This method try to find the right PreviewWidget instance accordingly else return 0.
     */
    PreviewWidget* previewWidget() const;

signals:

    void signalZoomChanged(bool isMax, bool isMin, double zoom);

private slots:

    void slotZoomChanged(double);

private:

    EditorStackViewPriv* d;
};

}  // namespace Digikam

#endif /* EDITORSTACKVIEW_H */
