10b9e3b024
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27729 a1c6a512-1295-4272-9138-f99709370657
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2010 Robert Bieber
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef RBMOVABLE_H
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#define RBMOVABLE_H
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#include <QGraphicsItem>
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/*
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* This is a base class for scene elements that can be moved around and
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* resized. It adds some basic functionality for showing a border around
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* selected items and ensuring that they don't get moved out of their parent's
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* bounding rect, as well as resizing them. It includes one pure virtual
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* function, saveGeometry(), that is responsible for syncing the changed
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* geometry back to the parse tree to be code gen'd into the file.
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*/
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class RBMovable : public QGraphicsItem
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{
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public:
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RBMovable(QGraphicsItem* parent);
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~RBMovable();
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virtual void paint(QPainter *painter,
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const QStyleOptionGraphicsItem *option, QWidget *widget);
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virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
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virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
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virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
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virtual QRectF boundingRect() const{ return size; }
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protected:
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virtual QVariant itemChange(GraphicsItemChange change,
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const QVariant &value);
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/* Responsible for updating the parse tree */
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virtual void saveGeometry() = 0;
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QRectF size;
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private:
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static const double handleSize;
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QRectF topLeftHandle();
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QRectF topRightHandle();
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QRectF bottomLeftHandle();
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QRectF bottomRightHandle();
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enum{
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None,
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TopLeft,
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TopRight,
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BottomLeft,
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BottomRight
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} dragMode;
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QPointF dragStartPos;
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QRectF dragStartSize;
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QPointF dragStartClick;
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double dHeightMin;
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double dHeightMax;
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double dWidthMin;
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double dWidthMax;
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};
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#endif // RBMOVABLE_H
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