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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 <kdelibs_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 KDEUI_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 90┬║ clockwise
- */
- void rotateClockwise();
- /**
- * Rotates the current image 90┬║ 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
-
-