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/*
For general Scribus (>=1.3.2) copyright and licensing information please refer
to the COPYING file provided with the program. Following this notice may exist
a copyright and/or license notice that predates the release of Scribus 1.3.2
for which a new license (GPL+exception) is in place.
*/

#ifndef CURVEWIDGET_H
#define CURVEWIDGET_H

#include <qvariant.h>
#include <qpixmap.h>
#include <qwidget.h>
#include "fpointarray.h"
#include "scribusapi.h"

class QVBoxLayout;
class QHBoxLayout;
class QGridLayout;
class QSpacerItem;
class QPushButton;
class QToolButton;
class QLabel;

class SCRIBUS_API KCurve : public QWidget
{
        Q_OBJECT

public:
        KCurve(QWidget *parent);
        virtual ~KCurve();
        void setPixmap(QPixmap pix);

protected:
        void paintEvent(QPaintEvent *);
        void keyPressEvent(QKeyEvent *);
        void mousePressEvent (QMouseEvent * e);
        void mouseReleaseEvent ( QMouseEvent * e );
        void mouseMoveEvent ( QMouseEvent * e );
        void leaveEvent ( QEvent * );

public:
        double getCurveValue(double x);
        FPointArray getCurve();
        void setCurve(FPointArray inlist);
        void resetCurve();
        void setLinear(bool setter);
        bool isLinear();

signals:
        void modified();

private:
        double m_leftmost;
        double m_rightmost;
        FPoint m_grab_point;
        int m_pos;
        bool m_dragging;
        bool m_linear;
        double m_grabOffsetX;
        double m_grabOffsetY;
        FPointArray m_points;
        FPointArray m_points_back;
        QPixmap *m_pix;
};

class SCRIBUS_API CurveWidget : public QWidget
{
        Q_OBJECT

public:
        CurveWidget(QWidget* parent);
        ~CurveWidget() {};
        void setLinear(bool setter);
        QPushButton* invertButton;
        QPushButton* resetButton;
        QToolButton *linearButton;
        QPushButton* loadButton;
        QPushButton* saveButton;
        KCurve* cDisplay;

private slots:
        void doInvert();
        void doReset();
        void doLinear();
        void doLoad();
        void doSave();

protected:
        QHBoxLayout* CurveWidgetLayout;
        QVBoxLayout* layout1;
        QSpacerItem* spacer1;

protected slots:
        virtual void languageChange();
};

#endif // CURVEWIDGET_H