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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
* Copyright (C) 2016 Robin Gareus <robin@gareus.org>
*
* 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 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <cmath>
#include <cairomm/context.h>
#include "ardour/automation_control.h"
#include "ardour/value_as_string.h"
#include "ardour/dB.h"
#include "ardour/utils.h"
#include "gtkmm2ext/colors.h"
#include "gtkmm2ext/gui_thread.h"
#include "gtkmm2ext/rgb_macros.h"
#include "canvas/text.h"
#include "maschine2.h"
#include "m2controls.h"
#include "ui_knob.h"
#include "pbd/i18n.h"
#ifdef __APPLE__
#define Rect ArdourCanvas::Rect
#endif
using namespace PBD;
using namespace ARDOUR;
using namespace ArdourSurface;
using namespace ArdourCanvas;
Maschine2Knob::Maschine2Knob (PBD::EventLoop* el, Item* parent)
: Container (parent)
, _ctrl (0)
, _eventloop (el)
, _radius (11)
, _val (0)
, _normal (0)
{
Pango::FontDescription fd ("Sans 10px");
text = new Text (this);
text->set_font_description (fd);
text->set_position (Duple (-_radius, _radius + 2));
text->set_color (0xffffffff);
_bounding_box_dirty = true;
}
Maschine2Knob::~Maschine2Knob ()
{
}
void
Maschine2Knob::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
if (!_controllable) {
/* no controllable, nothing to draw */
return;
}
// TODO consider a "bar" circular shape + 1bit b/w is ugly
const float scale = 2.f * _radius;
const float pointer_thickness = std::max (1.f, 3.f * (scale / 80.f));
const float start_angle = ((180.f - 65.f) * M_PI) / 180.f;
const float end_angle = ((360.f + 65.f) * M_PI) / 180.f;
float zero = 0;
const float value_angle = start_angle + (_val * (end_angle - start_angle));
const float zero_angle = start_angle + (zero * (end_angle - start_angle));
float value_x = cos (value_angle);
float value_y = sin (value_angle);
/* translate so that all coordinates are based on the center of the
* knob (which is also its position()
*/
context->save ();
Duple origin = item_to_window (Duple (0, 0));
context->translate (origin.x - 0.5, origin.y - 0.5);
context->begin_new_path ();
float center_radius = 0.48*scale;
float border_width = 0.8;
const bool arc = true;
if (arc) {
center_radius = scale * 0.33;
float inner_progress_radius = scale * 0.38;
float outer_progress_radius = scale * 0.48;
float progress_width = (outer_progress_radius-inner_progress_radius);
float progress_radius = inner_progress_radius + progress_width/2.0;
// draw the arc
context->set_source_rgb (1, 1, 1);
context->set_line_width (progress_width);
if (zero_angle > value_angle) {
context->arc (0, 0, progress_radius, value_angle, zero_angle);
} else {
context->arc (0, 0, progress_radius, zero_angle, value_angle);
}
context->stroke ();
}
// knob body
context->set_line_width (border_width);
context->set_source_rgb (1, 1, 1);
context->arc (0, 0, center_radius, 0, 2.0*G_PI);
context->fill ();
// line
context->set_source_rgb (0, 0, 0);
context->set_line_cap (Cairo::LINE_CAP_ROUND);
context->set_line_width (pointer_thickness);
context->move_to ((center_radius * value_x), (center_radius * value_y));
context->line_to (((center_radius * 0.2) * value_x), ((center_radius * 0.2) * value_y));
context->stroke ();
/* reset all translations, scaling etc. */
context->restore ();
render_children (area, context);
}
void
Maschine2Knob::compute_bounding_box () const
{
if (!_canvas || _radius == 0) {
_bounding_box = Rect ();
_bounding_box_dirty = false;
return;
}
if (_bounding_box_dirty) {
_bounding_box = Rect (- _radius, - _radius, _radius, _radius);
_bounding_box_dirty = false;
}
add_child_bounding_boxes ();
}
void
Maschine2Knob::set_controllable (boost::shared_ptr<AutomationControl> c)
{
watch_connection.disconnect ();
if (!c) {
_controllable.reset ();
return;
}
_controllable = c;
_controllable->Changed.connect (watch_connection, invalidator(*this), boost::bind (&Maschine2Knob::controllable_changed, this), _eventloop);
controllable_changed ();
// set _controllable->desc()->label
}
void
Maschine2Knob::set_control (M2EncoderInterface* ctrl)
{
encoder_connection.disconnect ();
_ctrl = ctrl;
if (!ctrl) {
return;
}
ctrl->changed.connect_same_thread (encoder_connection, boost::bind (&Maschine2Knob::encoder_changed, this, _1));
}
void
Maschine2Knob::encoder_changed (int delta)
{
if (!_controllable) {
return;
}
const double d = delta * 0.5 / _ctrl->range ();
boost::shared_ptr<AutomationControl> ac = _controllable;
ac->set_value (ac->interface_to_internal (min (ac->upper(), max (ac->lower(), ac->internal_to_interface (ac->get_value()) + d))), PBD::Controllable::UseGroup);
}
void
Maschine2Knob::controllable_changed ()
{
if (_controllable) {
_normal = _controllable->internal_to_interface (_controllable->normal());
_val = _controllable->internal_to_interface (_controllable->get_value());
const ParameterDescriptor& desc (_controllable->desc());
char buf[64];
switch (_controllable->parameter().type()) {
case ARDOUR::PanAzimuthAutomation:
snprintf (buf, sizeof (buf), _("L:%3d R:%3d"), (int) rint (100.0 * (1.0 - _val)), (int) rint (100.0 * _val));
text->set (buf);
break;
case ARDOUR::PanWidthAutomation:
snprintf (buf, sizeof (buf), "%d%%", (int) floor (_val*100));
text->set (buf);
break;
case ARDOUR::GainAutomation:
case ARDOUR::BusSendLevel:
case ARDOUR::TrimAutomation:
snprintf (buf, sizeof (buf), "%+4.1f dB", accurate_coefficient_to_dB (_controllable->get_value()));
text->set (buf);
break;
default:
text->set (ARDOUR::value_as_string (desc, _val));
break;
}
} else {
text->set ("---");
}
redraw ();
}
|
