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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* @file
* HSLuv color wheel widget, based on the web implementation at
* https://www.hsluv.org
*
* Authors:
* Tavmjong Bah
* Massinissa Derriche <massinissa.derriche@gmail.com>
*
* Copyright (C) 2018, 2021 Authors
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef INK_COLORWHEEL_H
#define INK_COLORWHEEL_H
#include <gtkmm.h>
namespace Inkscape {
namespace UI {
namespace Widget {
struct PickerGeometry;
/**
* @class ColorWheel
*/
class ColorWheel : public Gtk::DrawingArea
{
public:
ColorWheel();
virtual void setRgb(double r, double g, double b, bool overrideHue = true);
virtual void getRgb(double *r, double *g, double *b) const;
virtual void getRgbV(double *rgb) const;
virtual guint32 getRgb() const;
void setHue(double h);
void setSaturation(double s);
virtual void setLightness(double l);
void getValues(double *a, double *b, double *c) const;
bool isAdjusting() const { return _adjusting; }
protected:
virtual void _set_from_xy(double const x, double const y);
double _values[3];
bool _adjusting;
private:
// Callbacks
bool on_key_release_event(GdkEventKey* key_event) override;
// Signals
public:
sigc::signal<void> signal_color_changed();
protected:
sigc::signal<void> _signal_color_changed;
};
/**
* @class ColorWheelHSL
*/
class ColorWheelHSL : public ColorWheel
{
public:
void setRgb(double r, double g, double b, bool overrideHue = true) override;
void getRgb(double *r, double *g, double *b) const override;
void getRgbV(double *rgb) const override;
guint32 getRgb() const override;
void getHsl(double *h, double *s, double *l) const;
protected:
bool on_draw(const::Cairo::RefPtr<::Cairo::Context>& cr) override;
bool on_focus(Gtk::DirectionType direction) override;
private:
void _set_from_xy(double const x, double const y) override;
bool _is_in_ring(double x, double y);
bool _is_in_triangle(double x, double y);
void _update_triangle_color(double x, double y);
void _update_ring_color(double x, double y);
void _triangle_corners(double& x0, double& y0, double& x1, double& y1, double& x2,
double& y2);
enum class DragMode {
NONE,
HUE,
SATURATION_VALUE
};
double _ring_width = 0.2;
DragMode _mode = DragMode::NONE;
bool _focus_on_ring = true;
// Callbacks
bool on_button_press_event(GdkEventButton* event) override;
bool on_button_release_event(GdkEventButton* event) override;
bool on_motion_notify_event(GdkEventMotion* event) override;
bool on_key_press_event(GdkEventKey* key_event) override;
};
/**
* @class ColorWheelHSLuv
*/
class ColorWheelHSLuv : public ColorWheel
{
public:
ColorWheelHSLuv();
~ColorWheelHSLuv() override;
void setRgb(double r, double g, double b, bool overrideHue = true) override;
void getRgb(double *r, double *g, double *b) const override;
void getRgbV(double *rgb) const override;
guint32 getRgb() const override;
void setHsluv(double h, double s, double l);
void setLightness(double l) override;
void getHsluv(double *h, double *s, double *l) const;
protected:
bool on_draw(const::Cairo::RefPtr<::Cairo::Context>& cr) override;
private:
void _set_from_xy(double const x, double const y) override;
void _update_polygon();
// Callbacks
bool on_button_press_event(GdkEventButton* event) override;
bool on_button_release_event(GdkEventButton* event) override;
bool on_motion_notify_event(GdkEventMotion* event) override;
bool on_key_press_event(GdkEventKey* key_event) override;
double _scale;
PickerGeometry *_picker_geometry;
std::vector<guint32> _buffer_polygon;
Cairo::RefPtr<::Cairo::ImageSurface> _surface_polygon;
int _cache_width, _cache_height;
int _square_size;
};
} // namespace Widget
} // namespace UI
} // namespace Inkscape
#endif // INK_COLORWHEEL_HSLUV_H
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