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132 lines
3.2 KiB
132 lines
3.2 KiB
/* ============================================================
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*
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* This file is a part of digiKam project
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* http://www.digikam.org
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*
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* Date : 2006-06-13
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* Description : a widget to display an image preview
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*
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* Copyright (C) 2006-2007 Gilles Caulier <caulier dot gilles at gmail dot com>
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General
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* Public License as published by the Free Software Foundation;
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* either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* ============================================================ */
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#ifndef PREVIEWWIDGET_H
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#define PREVIEWWIDGET_H
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// TQt includes.
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#include <tqscrollview.h>
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// Local includes.
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#include "digikam_export.h"
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class TQPainter;
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class TQPixmap;
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class TQColor;
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namespace Digikam
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{
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class PreviewWidgetPriv;
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class DIGIKAM_EXPORT PreviewWidget : public TQScrollView
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{
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TQ_OBJECT
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public:
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PreviewWidget(TQWidget *parent=0);
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~PreviewWidget();
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void setZoomFactor(double z);
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void setZoomFactor(double z, bool centerView);
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void setZoomFactorSnapped(double z);
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void setBackgroundColor(const TQColor& color);
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void fitToWindow();
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bool isFitToWindow();
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void toggleFitToWindow();
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void toggleFitToWindowOr100();
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int zoomWidth();
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int zoomHeight();
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bool maxZoom();
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bool minZoom();
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double snapZoom(double zoom);
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double zoomFactor();
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double zoomMax();
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double zoomMin();
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void setZoomMax(double z);
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void setZoomMin(double z);
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signals:
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void signalRightButtonClicked();
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void signalLeftButtonClicked();
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void signalShowNextImage();
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void signalShowPrevImage();
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void signalZoomFactorChanged(double);
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void signalContentsMovedEvent(bool);
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public slots:
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void slotIncreaseZoom();
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void slotDecreaseZoom();
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void slotReset();
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protected:
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bool m_movingInProgress;
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protected:
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enum AutoZoomMode
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{
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ZoomInOrOut,
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ZoomInOnly
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};
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double calcAutoZoomFactor(AutoZoomMode mode = ZoomInOrOut);
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int tileSize();
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void updateAutoZoom(AutoZoomMode mode = ZoomInOrOut);
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void updateContentsSize();
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TQRect previewRect();
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virtual void resizeEvent(TQResizeEvent *);
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virtual void viewportPaintEvent(TQPaintEvent *);
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virtual void contentsMousePressEvent(TQMouseEvent *);
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virtual void contentsMouseMoveEvent(TQMouseEvent *);
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virtual void contentsMouseReleaseEvent(TQMouseEvent *);
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virtual void contentsWheelEvent(TQWheelEvent *);
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virtual void setContentsSize();
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virtual void viewportPaintExtraData(){};
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virtual int previewWidth()=0;
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virtual int previewHeight()=0;
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virtual bool previewIsNull()=0;
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virtual void resetPreview()=0;
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virtual void paintPreview(TQPixmap *pix, int sx, int sy, int sw, int sh)=0;
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virtual void zoomFactorChanged(double zoom);
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private:
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PreviewWidgetPriv* d;
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};
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} // NameSpace Digikam
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#endif /* PREVIEWWIDGET_H */
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