File indexing completed on 2024-05-12 16:34:23 

0001 /* This file is part of the KDE project
0002    Copyright 2011 Silvio Heinrich <plassy@web.de>
0003 
0004    This library is free software; you can redistribute it and/or
0005    modify it under the terms of the GNU Library General Public
0006    License as published by the Free Software Foundation; either
0007    version 2 of the License, or (at your option) any later version.
0008 
0009    This library is distributed in the hope that it will be useful,
0010    but WITHOUT ANY WARRANTY; without even the implied warranty of
0011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0012    Library General Public License for more details.
0013 
0014    You should have received a copy of the GNU Library General Public License
0015    along with this library; see the file COPYING.LIB.  If not, write to
0016    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0017    Boston, MA 02110-1301, USA.
0018 */
0019 
0020 #ifndef H_CROP_WIDGET_H
0021 #define H_CROP_WIDGET_H
0022 
0023 #include <QWidget>
0024 #include <QImage>
0025 #include "SelectionRect.h"
0026 
0027 class PictureShape;
0028 
0029 /**
0030  * This widget is a graphical user interface to the functionality
0031  * the SelectionRect class provides. It shows an image and the user can
0032  * move a rectangle freely to select a certain region of that image.
0033  */
0034 class CropWidget : public QWidget
0035 {
0036     Q_OBJECT
0037 
0038 public:
0039     explicit CropWidget(QWidget *parent=0);
0040 
0041     void paintEvent(QPaintEvent *event) override;
0042     void mousePressEvent(QMouseEvent *event) override;
0043     void mouseMoveEvent(QMouseEvent *event) override;
0044     void mouseReleaseEvent(QMouseEvent *event) override;
0045     void resizeEvent(QResizeEvent *event) override;
0046 
0047     void setPictureShape(PictureShape* shape);
0048     void setCropRect(const QRectF &rect);
0049     void setKeepPictureProportion(bool keepProportion);
0050     void maximizeCroppedArea();
0051 
0052 Q_SIGNALS:
0053     void sigCropRegionChanged(const QRectF&, bool undoLast);
0054 
0055 private:
0056     void calcImageRect();
0057     void emitCropRegionChanged();
0058     QPointF toUniformCoord(const QPointF& coord) const;
0059     QPointF fromUniformCoord(const QPointF& coord) const;
0060 
0061 private:
0062     PictureShape *m_pictureShape;
0063     QRectF m_imageRect;
0064     QRectF m_oldSelectionRect;
0065     SelectionRect m_selectionRect;
0066     bool m_isMousePressed;
0067     bool m_undoLast;
0068 };
0069 
0070 #endif // H_CROP_WIDGET_H