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/* ============================================================
*
* Copyright 2004-2005 by Gilles Caulier (original work as digikam curveswidget)
* Copyright 2005 by Casper Boemann (reworked to be generic)
*
* 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, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* ============================================================ */
#ifndef KCURVE_H
#define KCURVE_H
// Qt includes.
#include <qwidget.h>
#include <qcolor.h>
#include <qpair.h>
#include <qsortedlist.h>
#include <koffice_export.h>
class KRITAUI_EXPORT KCurve : public QWidget
{
Q_OBJECT
public:
KCurve(QWidget *parent = 0, const char *name = 0, WFlags f = 0);
virtual ~KCurve();
void reset(void);
void setCurveGuide(QColor color);
void setPixmap(QPixmap pix);
signals:
void modified(void);
protected:
void keyPressEvent(QKeyEvent *);
void paintEvent(QPaintEvent *);
void mousePressEvent (QMouseEvent * e);
void mouseReleaseEvent ( QMouseEvent * e );
void mouseMoveEvent ( QMouseEvent * e );
void leaveEvent ( QEvent * );
public:
static double getCurveValue(QPtrList<QPair<double,double> > &curve, double x);
double getCurveValue(double x);
QPtrList<QPair<double,double> > getCurve();
void setCurve(QPtrList<QPair<double,double> >inlist);
private:
double m_leftmost;
double m_rightmost;
QPair<double,double> *m_grab_point;
bool m_dragging;
double m_grabOffsetX;
double m_grabOffsetY;
bool m_readOnlyMode;
bool m_guideVisible;
QColor m_colorGuide;
QPtrList<QPair<double,double> > m_points;
QPixmap *m_pix;
};
#endif /* KCURVE_H */
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