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+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date : 2004-08-17
+ * Description : a widget to draw an image clip region.
+ *
+ * Copyright (C) 2004-2008 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 IMAGEREGIONWIDGET_H
+#define IMAGEREGIONWIDGET_H
+
+// TQt includes.
+
+#include <tqrect.h>
+
+// Local includes.
+
+#include "previewwidget.h"
+#include "dimg.h"
+#include "digikam_export.h"
+
+namespace Digikam
+{
+
+class ImageRegionWidgetPriv;
+
+class DIGIKAM_EXPORT ImageRegionWidget : public PreviewWidget
+{
+TQ_OBJECT
+
+
+public:
+
+ enum SeparateViewMode
+ {
+ SeparateViewHorizontal=0,
+ SeparateViewVertical,
+ SeparateViewNone,
+ SeparateViewDuplicateVert,
+ SeparateViewDuplicateHorz
+ };
+
+public:
+
+ ImageRegionWidget(int wp, int hp, TQWidget *parent=0, bool scrollBar=true);
+ ~ImageRegionWidget();
+
+ void setContentsPosition(int x, int y, bool targetDone);
+ void setCenterContentsPosition();
+
+ /** To get image region including original or/and target area depending of separate view mode.
+ The region is given using not scaled image unit.*/
+ TQRect getImageRegion();
+
+ /** To get target image region area to render */
+ TQRect getImageRegionToRender();
+
+ /** To get target image region image to use for render operations */
+ DImg getImageRegionImage();
+
+ void updatePreviewImage(DImg *img);
+
+ void backupPixmapRegion();
+ void restorePixmapRegion();
+
+ void setHighLightPoints(const TQPointArray& pointsList);
+ void drawSeparateView();
+
+public slots:
+
+ void slotSeparateViewToggled(int mode);
+
+private slots:
+
+ void slotZoomFactorChanged();
+
+private:
+
+ void updatePixmap(DImg& img);
+ TQRect getLocalTargetImageRegion();
+ TQRect getLocalImageRegionToRender();
+ void viewportPaintExtraData();
+ int previewWidth();
+ int previewHeight();
+ bool previewIsNull();
+ void resetPreview();
+ void setContentsSize();
+ void resizeEvent(TQResizeEvent *);
+ void contentsWheelEvent(TQWheelEvent *);
+
+ inline void paintPreview(TQPixmap *pix, int sx, int sy, int sw, int sh);
+
+private:
+
+ ImageRegionWidgetPriv* d;
+};
+
+} // NameSpace Digikam
+
+#endif /* IMAGEREGIONWIDGET_H */