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Diffstat (limited to 'src/ui/widget/ink-color-wheel.h')
-rw-r--r-- | src/ui/widget/ink-color-wheel.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/ui/widget/ink-color-wheel.h b/src/ui/widget/ink-color-wheel.h new file mode 100644 index 0000000..c6333b7 --- /dev/null +++ b/src/ui/widget/ink-color-wheel.h @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Color wheel widget. Outer ring for Hue. Inner triangle for Saturation and Value. + * + * Copyright (C) 2018 Tavmjong Bah + * + * The contents of this file may be used under the GNU General Public License Version 2 or later. + * + */ + +#ifndef INK_COLORWHEEL_H +#define INK_COLORWHEEL_H + +/* Rewrite of the C Gimp ColorWheel which came originally from GTK2. */ + +#include <gtkmm.h> +#include <iostream> + +namespace Inkscape { +namespace UI { +namespace Widget { + +class ColorWheel : public Gtk::DrawingArea +{ +public: + ColorWheel(); + void set_rgb(const double& r, const double& g, const double& b, bool override_hue = true); + void get_rgb(double& r, double& g, double& b); + guint32 get_rgb(); + bool is_adjusting() {return _mode != DRAG_NONE;} + +protected: + bool on_draw(const::Cairo::RefPtr<::Cairo::Context>& cr) override; + +private: + void triangle_corners(double& x0, double& y0, + double& x1, double& y1, + double& x2, double& y2); + void set_from_xy(const double& x, const double& y); + bool is_in_ring( const double& x, const double& y); + bool is_in_triangle(const double& x, const double& y); + + enum DragMode { + DRAG_NONE, + DRAG_H, + DRAG_SV + }; + + double _hue; // Range [0,1) + double _saturation; + double _value; + double _ring_width; + DragMode _mode; + bool _focus_on_ring; + + // Callbacks + bool on_focus(Gtk::DirectionType direction) override; + 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; + + // Signals +public: + sigc::signal<void> signal_color_changed(); + +protected: + sigc::signal<void> _signal_color_changed; + +}; + +} // Namespace Inkscape +} +} +#endif // INK_COLOR_WHEEL_H + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |