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+/* This file is part of the KDE libraries
+ Copyright (C) 2004 Antonio Larrosa <larrosa@kde.org
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public License
+ along with this library; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+#ifndef __KPIXMAPREGIONSELECTORWIDGET_H__
+#define __KPIXMAPREGIONSELECTORWIDGET_H__
+#include <qvbox.h>
+#include <qpixmap.h>
+#include <qrect.h>
+#include <qlabel.h>
+#include <kimageeffect.h>
+
+class KPopupMenu;
+
+#include "kopete_export.h"
+
+/**
+ * KPixmapRegionSelectorWidget is a widget that shows a picture and provides the
+ * user with a friendly way to select a rectangular subregion of the pixmap.
+ *
+ * NOTE: There are two copies of this .h and the .cpp file, with subtle differences.
+ * One copy is in kdelibs/kdeui, and the other copy is in kdepim/libkdepim
+ * This is because kdepim has to remain backwards compatible. Any changes
+ * to either file should be made to the other.
+ *
+ * @author Antonio Larrosa <larrosa@kde.org>
+ * @since 3.4
+ */
+class KOPETE_EXPORT KPixmapRegionSelectorWidget : public QWidget
+{
+ Q_OBJECT
+public:
+ /**
+ * Constructor for a KPixmapRegionSelectorWidget.
+ */
+ KPixmapRegionSelectorWidget( QWidget *parent = 0L, const char *name=0L);
+
+ /**
+ * Destructor for a KPixmapRegionSelectorWidget
+ */
+ ~KPixmapRegionSelectorWidget();
+
+ /**
+ * Sets the pixmap which will be shown for the user to select a region from.
+ * @param pixmap The pixmap. Must be non-null.
+ *
+ */
+ void setPixmap( const QPixmap &pixmap );
+
+ /**
+ * @return the original whole pixmap that we're using in this widget as the
+ * pixmap the user is selecting a region from.
+ */
+ QPixmap pixmap() const { return m_unzoomedPixmap; };
+
+ /**
+ * Sets the selected region to be @p rect (in zoomed pixmap coordinates)
+ */
+ void setSelectedRegion(const QRect &rect);
+
+ /**
+ * Returns the selected region ( in zoomed pixmap coordinates )
+ */
+ QRect selectedRegion() const;
+
+ /**
+ * Returns the selected region ( in unzoomed, original pixmap coordinates )
+ */
+ QRect unzoomedSelectedRegion() const;
+
+ /**
+ * Resets the selection to use the whole image
+ */
+ void resetSelection();
+
+ /**
+ * @returns a QImage object with just the region the user selected from the
+ * image
+ */
+ QImage selectedImage() const;
+
+ /**
+ * Sets the aspect ration that the selected subimage should have. The way to
+ * select it, is specifying an example valid @p width and @p height.
+ * @see setFreeSelectionAspectRatio()
+ */
+ void setSelectionAspectRatio(int width, int height);
+
+ /**
+ * Allows the user to do a selection which has any aspect ratio. This is
+ * the default.
+ * @see setSelectionAspectRatio()
+ */
+ void setFreeSelectionAspectRatio();
+
+ /**
+ * Sets the maximum size for the widget. If the image is larger than this
+ * (either horizontally or vertically), it's scaled to adjust to the maximum
+ * size (preserving the aspect ratio)
+ */
+ void setMaximumWidgetSize( int width, int height );
+
+ /**
+ * Rotates the image as specified by the @p direction parameter, also tries
+ * to rotate the selected region so that it doesn't change, as long as the
+ * forced aspect ratio setting is respected, in other case, the selected region
+ * is resetted.
+ */
+ void rotate(KImageEffect::RotateDirection direction);
+
+public slots:
+ /**
+ * Rotates the current image 90º clockwise
+ */
+ void rotateClockwise();
+ /**
+ * Rotates the current image 90º counterclockwise
+ */
+ void rotateCounterclockwise();
+
+protected:
+ /**
+ * Creates a KPopupMenu with the menu that appears when clicking with the right button on the label
+ */
+ virtual KPopupMenu *createPopupMenu();
+
+private:
+ bool eventFilter(QObject *obj, QEvent *ev);
+
+ /**
+ * Recalculates the pixmap that is shown based on the current selected area,
+ * the original image, etc.
+ */
+ void updatePixmap();
+
+ QRect calcSelectionRectangle( const QPoint &startPoint, const QPoint & endPoint );
+
+ enum CursorState { None=0, Resizing, Moving };
+ CursorState m_state;
+
+ QPixmap m_unzoomedPixmap;
+ QPixmap m_originalPixmap;
+ QPixmap m_linedPixmap;
+ QRect m_selectedRegion;
+ QLabel *m_label;
+
+ QPoint m_tempFirstClick;
+ double m_forcedAspectRatio;
+
+ int m_maxWidth, m_maxHeight;
+ double m_zoomFactor;
+};
+
+#endif
+