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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* knob.cc
*
* Thu Feb 28 07:37:27 CET 2013
* Copyright 2013 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of CamSync.
*
* CamSync 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.
*
* CamSync 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 CamSync; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "knob.h"
#include "painter.h"
#include <hugin.hpp>
#include <stdio.h>
// M_PI is not defined in math.h if __STRICT_ANSI__ is defined.
#ifdef __STRICT_ANSI__
#undef __STRICT_ANSI__
#endif
#include <math.h>
namespace GUI {
Knob::Knob(Widget *parent)
: Widget(parent)
, img_knob(":knob.png")
{
state = up;
maximum = 1.0;
minimum = 0.0;
currentValue = minimum;
mouse_offset_x = 0;
}
void Knob::setValue(float value)
{
internalSetValue(value);
}
float Knob::value()
{
return currentValue;
}
void Knob::scrollEvent(ScrollEvent *e)
{
float value = currentValue - (e->delta / 200.0);
internalSetValue(value);
}
void Knob::mouseMoveEvent(MouseMoveEvent *e)
{
if(state == down) {
if(mouse_offset_x == (e->x + -1 * e->y)) {
return;
}
float dval = mouse_offset_x - (e->x + -1 * e->y);
float value = currentValue - (dval / 300.0);
internalSetValue(value);
mouse_offset_x = e->x + -1 * e->y;
}
}
void Knob::keyEvent(KeyEvent *e)
{
if(e->direction != -1) {
return;
}
float value = currentValue;
switch(e->keycode) {
case KeyEvent::KEY_UP:
value += 0.01;
break;
case KeyEvent::KEY_DOWN:
value -= 0.01;
break;
case KeyEvent::KEY_RIGHT:
value += 0.01;
break;
case KeyEvent::KEY_LEFT:
value -= 0.01;
break;
case KeyEvent::KEY_HOME:
value = 0;
break;
case KeyEvent::KEY_END:
value = 1;
break;
default:
break;
}
internalSetValue(value);
}
void Knob::buttonEvent(ButtonEvent *e)
{
if(e->direction == 1) {
state = down;
mouse_offset_x = e->x + -1*e->y;
}
if(e->direction == -1) {
state = up;
mouse_offset_x = e->x + -1*e->y;
clicked();
}
}
void Knob::repaintEvent(RepaintEvent *e)
{
int diameter = (width()>height()?height():width());
int radius = diameter / 2;
int center_x = width() / 2;
int center_y = height() / 2;
Painter p(this);
p.clear();
p.drawImageStretched(0, 0, &img_knob, diameter, diameter);
char buf[64];
sprintf(buf, "%.2f", currentValue * maximum);
Font font;
p.drawText(center_x - font.textWidth(buf) / 2 + 1,
center_y + font.textHeight(buf) / 2 + 1, font, buf);
// Make it start from 20% and stop at 80%
double padval = currentValue * 0.8 + 0.1;
double from_x = sin((-1 * padval + 1) * 2 * M_PI) * radius * 0.6;
double from_y = cos((-1 * padval + 1) * 2 * M_PI) * radius * 0.6;
double to_x = sin((-1 * padval + 1) * 2 * M_PI) * radius * 0.8;
double to_y = cos((-1 * padval + 1) * 2 * M_PI) * radius * 0.8;
// Draw "fat" line by drawing 9 lines with moved start/ending points.
p.setColour(Colour(1, 0, 0, 1));
for(int _x = -1; _x < 2; _x++) {
for(int _y = -1; _y < 2; _y++) {
p.drawLine(from_x + center_x + _x,
from_y + center_y + _y,
to_x + center_x + _x,
to_y + center_y + _y);
}
}
}
void Knob::internalSetValue(float value)
{
if(value < minimum) value = minimum;
if(value > maximum) value = maximum;
if(value == currentValue) {
return;
}
currentValue = value;
valueChangedNotifier.notify(currentValue);
repaintEvent(NULL);
}
} // GUI::
|
