curvewidget.h

/*
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 <QWidget>
#include <QEvent>
#include <QMouseEvent>
#include <QKeyEvent>
#include <QPaintEvent>

class QEvent;

#include "fpointarray.h"
#include "scribusapi.h"

class QVBoxLayout;
class QHBoxLayout;
class QPushButton;
class QPixmap;
class QSpacerItem;

class SCRIBUS_API KCurve : public QWidget
{
    Q_OBJECT

public:
    KCurve(QWidget *parent);
    virtual ~KCurve();

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

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;
};

class SCRIBUS_API CurveWidget : public QWidget
{
    Q_OBJECT

public:
    CurveWidget(QWidget* parent);
    ~CurveWidget() {};
    
    virtual void changeEvent(QEvent *e);
    
    void setLinear(bool setter);
    QPushButton* invertButton;
    QPushButton* resetButton;
    QPushButton *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