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/*********
*
* This file is part of BibleTime's source code, http://www.bibletime.info/.
*
* Copyright 1999-2009 by the BibleTime developers.
* The BibleTime source code is licensed under the GNU General Public License version 2.0.
*
**********/
#ifndef CSRCOLLBUTTON_H
#define CSRCOLLBUTTON_H
#include <QToolButton>
class QMouseEvent;
class QWidget;
class QMouseEvent;
class QWheelEvent;
/**
* This Class implements the direct chooser button used in the KeyChooser Widget.
* \author The BibleTime team.
*/
class CScrollButton: public QToolButton {
Q_OBJECT
public:
CScrollButton(QWidget *parent = 0);
virtual ~CScrollButton();
signals:
/**
* \brief The lock() signal is emitted when the button grabs the mouse
* and enters the locked state.
*/
void lock();
/**
* \brief The unlock() signal is emitted when the button releases the
* leaves the locked state.
*/
void unlock();
/**
* \brief Indicates a change the user made by moving the mouse.
*
* \param count the number of items to be changed in the KeyChooser
* ComboBox.
*/
void change_requested(int count);
protected:
/**
* \brief Grabs the mouse on left button click and emits lock().
*/
virtual void mousePressEvent(QMouseEvent *e);
/**
* \brief If the mouse is grabbed and we release the left mouse button,
* releases the mouse and emits unlock().
*/
virtual void mouseReleaseEvent(QMouseEvent *e);
/**
* \brief Reimplementation from \ref QWidget#mouseMoveEvent - processes
* the mouse move events
*/
virtual void mouseMoveEvent(QMouseEvent *e);
protected:
/**
* \brief Indicates whether the button is in locked state or not.
*
* If the button is in the locked state, this means the mouse is grabbed
* and any mouse move events invoke calculation about whether to emit the
* \ref CScrollButton#change_requested signal.
*/
bool m_isLocked;
};
#endif
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