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
|
/*
* This file is part of din.
*
* din is copyright (c) 2006 - 2012 S Jagannathan <jag@dinisnoise.org>
* For more information, please visit http://dinisnoise.org
*
* din 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.
*
* din 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 din. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef __slider
#define __slider
#include "widget.h"
#include "dingl.h"
#include "viewwin.h"
#include "utils.h"
#include "font.h"
#include <algorithm>
extern int mousex;
extern viewport view;
extern int lmb;
template <typename T> class values {
T low, high, delta, val;
float amount;
public:
values (T l = 0, T h = 0, float a = 0) {
set_limits (l, h);
set_amount (a);
}
operator T() {
return ((T) val);
}
void set_limits (T l, T h) {
low = l;
high = h;
delta = high - low;
}
void get_limits (T& l, T& h) {
l = low;
h = high;
}
T get_val () const { return val; }
void set_val (const T& v) {
val = v;
clamp<T> (low, val, high);
amount = (val - low) * 1. / delta;
}
void set_amount (float a) {
amount = a;
clamp<float> (0.0, amount, 1.0);
val = low + delta * amount;
}
float get_amount () const { return amount; }
};
#include <list>
using std::list;
template <typename T> class slider : public widget {
values<T> vx;
int dx;
int lmb_clicked;
int slide;
list < change_listener<slider> *> lsnrs;
typedef typename list< change_listener<slider> * >::iterator iter;
public:
slider (int w, int h) : widget (0, 0, w, h), vx (0, 0, 0), dx (0) {lmb_clicked = slide = 0;}
int handle_input () {
widget::handle_input ();
const box<int>& e = get_extents ();
int ret = 0;
if (lmb) {
if (lmb_clicked == 0) {
if (slide) {
slide = 0;
widget::focus = 0;
ret = 1;
}
else if (hovering()) {
slide = 1;
widget::focus = this;
ret = 1;
}
}
lmb_clicked = 1;
} else {
if (slide) {
dx = mousex - e.left;
clamp (0, dx, e.width);
float amount = dx * e.width_1;
vx.set_amount (amount);
for (iter i = lsnrs.begin (), j = lsnrs.end (); i != j; ++i) (*i)->changed (*this);
ret = 1;
}
lmb_clicked = 0;
}
return ret;
}
void draw () {
glEnable (GL_BLEND);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
const color& clr = get_color ();
glColor4f (clr.r, clr.g, clr.b, 0.25);
const box<int>& e = get_extents ();
glRecti (e.left, e.bottom, e.right, e.top);
glColor4f (clr.r, clr.g, clr.b, 1);
glRecti (e.left, e.bottom, e.left + dx, e.top);
glDisable (GL_BLEND);
}
void update () {
float amount = vx.get_amount ();
const box<int>& e = get_extents ();
dx = amount * e.width;
for (iter i = lsnrs.begin (), j = lsnrs.end (); i != j; ++i) (*i)->changed (*this);
}
void add_listener (change_listener<slider>* sl) {
lsnrs.push_back (sl);
}
T get_val () const { return vx.get_val (); }
void set_val (const T& t) {
vx.set_val (t);
update ();
}
void set_limits (T l, T h) {
float v = get_val ();
vx = values<T> (l, h);
set_val (v);
}
void get_limits (T& l, T& h) {
vx.get_limits (l, h);
}
};
#endif
|
