colorwheel.h

/*
 
Pencil2D - Traditional Animation Software
Copyright (C) 2012-2020 Matthew Chiawen Chang
 
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; version 2 of the License.
 
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 COLORWHEEL_H
#define COLORWHEEL_H
 
#include <QWidget>
 
 
class ColorWheel : public QWidget
{
    Q_OBJECT
public:
    explicit ColorWheel(QWidget* parent);
 
    QColor color();
 
signals:
    void colorSelected(const QColor& color);
    void colorChanged(const QColor& color);
    
public slots:
    void setColor(QColor color);
 
protected:
    void mousePressEvent(QMouseEvent*) override;
    void mouseMoveEvent(QMouseEvent*) override;
    void mouseReleaseEvent(QMouseEvent*) override;
    void resizeEvent(QResizeEvent*) override;
    void paintEvent(QPaintEvent*) override;
 
private:
    void hueChanged(const int& hue);
    void saturationChanged(const int& sat);
    void valueChanged(const int& value);
 
    QColor pickColor(const QPoint& point);
    
    void drawHueIndicator(const int& hue);
    void drawPicker(const QColor& color);
 
    void drawWheelImage(const QSize& newSize);
    void drawSquareImage(const int& hue);
    void composeWheel(QPixmap& pixmap);
 
private:
    QSize mInitSize{ 20, 20 };
    QImage mWheelImage;
    QImage mSquareImage;
    QPixmap mWheelPixmap;
   
    int mWheelThickness = 20;
    QRect mWheelRect;
    QRect mSquareRect;
    QColor mCurrentColor = Qt::red;
    bool mIsInWheel = false;
    bool mIsInSquare = false;
    
};
 
#endif // COLORWHEEL_H