qgraphicstrimslider.h

/*******************************************************************************
YCbCr Exporter
A tool to aid filmmakers / artists to manipulate YCbCr files to
maximize quality.
Copyright (C) 2013 Troy James Sobotka, troy.sobotka@gmail.com

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 3 of the License, 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.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*******************************************************************************/

#ifndef QGRAPHICSTRIMSLIDER_H
#define QGRAPHICSTRIMSLIDER_H

#include <QtWidgets>
#include "ffsequence.h"

class QGraphicsTrimSlider : public QGraphicsWidget
{
    Q_OBJECT
signals:
    void signal_trimChanged(ffTrim);
    void signal_valueChanged(long);

private:
    QColor                  m_colorInOut;
    QColor                  m_colorBackground;
    QColor                  m_colorPen;
    QRectF                  m_rectF;
    QPainterPath            m_painterPath;
    QPainterPath            m_painterPathTrim;

    long                    m_value;
    long                    m_minValue;
    long                    m_maxValue;
    long                    m_trimIn;
    long                    m_trimOut;
    float                   m_position;

    void updatePaths(void);

    void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *);

    void createObjects(void);
    void initObjects(void);

    float valueToGeometry(void);
    long geometryToValue(float);

    virtual void mousePressEvent(QGraphicsSceneMouseEvent *);
    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *);

    virtual void resizeEvent(QGraphicsSceneResizeEvent *);

    QPainterPath shape() const;

public:
    enum Default
    {
        Width = 100,
        Height = 16,
        MinimumValue = 0,
        MaximumValue = 100,
        ValueSliderWidth = 6,
        ValueSliderPen = 2,
        ColorDarkGray = 64,
        ColorMediumGray = 100,
        ColorLightGray = 140
    };

    QGraphicsTrimSlider(QGraphicsItem *parent = 0);
    ~QGraphicsTrimSlider();

    void setTrim(long, long);
    void setTrim(ffTrim);
    void setTrimIn(long);
    void setTrimOut(long);

    ffTrim getTrim(void);

    void setMaximum(long);
    void setMinimum(long);
    void setValue(long);

    long maximum(void);
    long minimum(void);
    long value(void);
};

#endif // QGRAPHICSTRIMSLIDER_H