Newer
Older
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
//
// "$Id$"
//
// Value slider widget for the Fast Light Tool Kit (FLTK).
// -- adapted (slevy@ncsa.uiuc.edu) for log scaling
// Copyright 1998-2000 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@fltk.org".
//
#include <FL/Fl.H>
#include "Fl_Log_Slider.H"
#include <FL/fl_draw.H>
#include <stdio.h>
#include <math.h>
Fl_Log_Slider::Fl_Log_Slider(int x,int y,int w,int h, const char*l)
: Fl_Slider(x,y,w,h,l) {
step(0,100);
textfont_ = FL_HELVETICA;
textsize_ = 10;
textcolor_ = FL_BLACK;
style_ = FL_LOG_LINEAR;
textwidth_ = 45;
}
int Fl_Log_Slider::format(char *buf) {
if(style_ == FL_LINEAR_LINEAR || style_ == FL_LOG_LINEAR)
Fl_Valuator::format(buf);
else
sprintf(buf, "%g", truevalue());
}
double Fl_Log_Slider::truevalue() {
if(style_ == FL_LINEAR_LINEAR)
return value();
double smin = minimum();
if(truemin_ == 0) {
truemin_ = (truemax_ == 0) ? 0.1 : 0.1 * truemax_;
}
if(truemax_ == 0) truemax_ = 100 * truemin_;
double lograt = log(fabs(truemax_ / truemin_));
return truemin_ * exp(lograt *
fabs( (value() - smin) / (maximum() - smin) ) );
}
void Fl_Log_Slider::truevalue( double v ) {
if(style_ == FL_LINEAR_LINEAR) {
value(v);
return;
}
if(truemin_ == 0) {
truemin_ = (truemax_ == 0) ? 0.1 : 0.1 * truemax_;
}
if(truemax_ == 0) truemax_ = 100 * truemin_;
double lograt = log(fabs(truemax_ / truemin_));
double w = v / truemin_;
if(w > 0) w = log(w) / lograt;
value( minimum() + w * (maximum() - minimum()) );
}
double Fl_Log_Slider::printvalue( double truev ) {
switch(style_) {
case FL_LOG_LOG:
case FL_LOG_LINEAR:
return truev==0 ? -10 : log10( fabs(truev) );
default:
case FL_LINEAR_LINEAR:
return truev;
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
}
}
void Fl_Log_Slider::draw() {
int sxx = x(), syy = y(), sww = w(), shh = h();
int bxx = x(), byy = y(), bww = w(), bhh = h();
if (horizontal()) {
bww = textwidth_; sxx += textwidth_; sww -= textwidth_;
} else {
syy += 25; bhh = 25; shh -= 25;
}
if (damage()&FL_DAMAGE_ALL) draw_box(box(),sxx,syy,sww,shh,color());
if(truedirt_) {
minimum( printvalue(truemin()) );
maximum( printvalue(truemax()) );
truedirt_ = 0;
}
Fl_Slider::draw(sxx+Fl::box_dx(box()),
syy+Fl::box_dy(box()),
sww-Fl::box_dw(box()),
shh-Fl::box_dh(box()));
draw_box(box(),bxx,byy,bww,bhh,color());
char buf[128];
format(buf);
fl_font(textfont(), textsize());
fl_color(active_r() ? textcolor() : inactive(textcolor()));
fl_draw(buf, bxx, byy, bww, bhh, FL_ALIGN_CLIP);
}
int Fl_Log_Slider::handle(int event) {
int sxx = x(), syy = y(), sww = w(), shh = h();
if (horizontal()) {
sxx += textwidth_; sww -= textwidth_;
} else {
syy += 25; shh -= 25;
}
return Fl_Slider::handle(event,
sxx+Fl::box_dx(box()),
syy+Fl::box_dy(box()),
sww-Fl::box_dw(box()),
shh-Fl::box_dh(box()));
}
//
// End of "$Id$".
//