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/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2006-06-13
* Description : a widget to display an image preview
*
* Copyright (C) 2006-2007 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 PREVIEWWIDGET_H
#define PREVIEWWIDGET_H
// TQt includes.
#include <tqscrollview.h>
// Local includes.
#include "digikam_export.h"
class TQPainter;
class TQPixmap;
class TQColor;
namespace Digikam
{
class PreviewWidgetPriv;
class DIGIKAM_EXPORT PreviewWidget : public TQScrollView
{
TQ_OBJECT
public:
PreviewWidget(TQWidget *parent=0);
~PreviewWidget();
void setZoomFactor(double z);
void setZoomFactor(double z, bool centerView);
void setZoomFactorSnapped(double z);
void setBackgroundColor(const TQColor& color);
void fitToWindow();
bool isFitToWindow();
void toggleFitToWindow();
void toggleFitToWindowOr100();
int zoomWidth();
int zoomHeight();
bool maxZoom();
bool minZoom();
double snapZoom(double zoom);
double zoomFactor();
double zoomMax();
double zoomMin();
void setZoomMax(double z);
void setZoomMin(double z);
signals:
void signalRightButtonClicked();
void signalLeftButtonClicked();
void signalShowNextImage();
void signalShowPrevImage();
void signalZoomFactorChanged(double);
void signalContentsMovedEvent(bool);
public slots:
void slotIncreaseZoom();
void slotDecreaseZoom();
void slotReset();
protected:
bool m_movingInProgress;
protected:
enum AutoZoomMode
{
ZoomInOrOut,
ZoomInOnly
};
double calcAutoZoomFactor(AutoZoomMode mode = ZoomInOrOut);
int tileSize();
void updateAutoZoom(AutoZoomMode mode = ZoomInOrOut);
void updateContentsSize();
TQRect previewRect();
virtual void resizeEvent(TQResizeEvent *);
virtual void viewportPaintEvent(TQPaintEvent *);
virtual void contentsMousePressEvent(TQMouseEvent *);
virtual void contentsMouseMoveEvent(TQMouseEvent *);
virtual void contentsMouseReleaseEvent(TQMouseEvent *);
virtual void contentsWheelEvent(TQWheelEvent *);
virtual void setContentsSize();
virtual void viewportPaintExtraData(){};
virtual int previewWidth()=0;
virtual int previewHeight()=0;
virtual bool previewIsNull()=0;
virtual void resetPreview()=0;
virtual void paintPreview(TQPixmap *pix, int sx, int sy, int sw, int sh)=0;
virtual void zoomFactorChanged(double zoom);
private:
PreviewWidgetPriv* d;
};
} // NameSpace Digikam
#endif /* PREVIEWWIDGET_H */
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