2014-11-19 02:23:05 +00:00
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/*
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* Copyright (C) 2007 Luca Gugelmann <lucag@student.ethz.ch>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Library General Public License version 2 as
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* published by the Free Software Foundation
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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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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef REGIONGRABBER_H
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#define REGIONGRABBER_H
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#include <QWidget>
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#include <QRegion>
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#include <QPoint>
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#include <QVector>
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#include <QRect>
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2019-05-23 00:08:45 +00:00
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#include <QPaintEvent>
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#include <QResizeEvent>
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#include <QMouseEvent>
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2014-11-19 02:23:05 +00:00
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class RegionGrabber : public QWidget
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{
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Q_OBJECT
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enum MaskType { StrokeMask, FillMask };
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public:
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RegionGrabber( const QRect &startSelection );
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~RegionGrabber();
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protected slots:
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void init();
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signals:
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void regionGrabbed( const QPixmap & );
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void regionUpdated( const QRect & );
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protected:
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void paintEvent( QPaintEvent* e );
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void resizeEvent( QResizeEvent* e );
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void mousePressEvent( QMouseEvent* e );
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void mouseMoveEvent( QMouseEvent* e );
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void mouseReleaseEvent( QMouseEvent* e );
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void mouseDoubleClickEvent( QMouseEvent* );
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void keyPressEvent( QKeyEvent* e );
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void updateHandles();
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QRegion handleMask( MaskType type ) const;
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QPoint limitPointToRect( const QPoint &p, const QRect &r ) const;
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QRect normalizeSelection( const QRect &s ) const;
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void grabRect();
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QRect selection;
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bool mouseDown;
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bool newSelection;
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const int handleSize;
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QRect* mouseOverHandle;
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QPoint dragStartPoint;
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QRect selectionBeforeDrag;
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bool showHelp;
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bool grabbing;
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// naming convention for handles
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// T top, B bottom, R Right, L left
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// 2 letters: a corner
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// 1 letter: the handle on the middle of the corresponding side
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QRect TLHandle, TRHandle, BLHandle, BRHandle;
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QRect LHandle, THandle, RHandle, BHandle;
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QRect helpTextRect;
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QVector<QRect*> handles;
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QPixmap pixmap;
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};
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#endif
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