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/***************************************************************************
MouseMark.h - Handling of mouse selection
-------------------
begin : Sun Nov 12 2000
copyright : (C) 2000 by Thomas Eschenbacher
email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef MOUSE_MARK_H
#define MOUSE_MARK_H
#include "config.h"
#include "libkwave/Sample.h"
namespace Kwave
{
/**
* Simple class that can be used whenever the user selects something
* with the mouse.
*/
class MouseMark
{
public:
/** Constructor */
MouseMark();
/** Destructor */
virtual ~MouseMark();
/**
* Sets the selection to a new range.
* @param l start position
* @param r end position
*/
void set(sample_index_t l, sample_index_t r);
/**
* Update the last known position of the mouse. This should be
* used for continuous update of the selection during mouse
* movement.
* @param x new last position
*/
void update(sample_index_t x);
/**
* Re-enters the selection process at a new position. The last
* position will be set to the left or the right margin, depending
* on which side is nearer.
*/
void grep(sample_index_t x);
/**
* Returns the left border of the selection.
*/
sample_index_t left() const;
/**
* Returns the right border of the selection.
*/
sample_index_t right() const;
/**
* Returns the length of the selection
*/
inline sample_index_t length() const {
return right() - left() + 1;
}
private:
/** initial position of the mouse */
sample_index_t m_initial;
/** last known position of the mouse */
sample_index_t m_last;
};
}
#endif /* MOUSE_MARK_H */
//***************************************************************************
//***************************************************************************
|
