1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
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 :
|
