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
|
//
// "$Id: arc.cxx 5519 2006-10-11 03:12:15Z mike $"
//
// Arc drawing test program for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2005 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 on the following page:
//
// http://www.fltk.org/str.php
//
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Hor_Value_Slider.H>
#include <FL/fl_draw.H>
double args[6] = {140, 140, 50, 0, 360, 0};
const char* name[6] = {"X", "Y", "R", "start", "end", "rotate"};
class Drawing : public Fl_Widget {
void draw() {
fl_clip(x(),y(),w(),h());
fl_color(FL_DARK3);
fl_rectf(x(),y(),w(),h());
fl_push_matrix();
if (args[5]) {
fl_translate(x()+w()/2.0, y()+h()/2.0);
fl_rotate(args[5]);
fl_translate(-(x()+w()/2.0), -(y()+h()/2.0));
}
fl_color(FL_WHITE);
fl_translate(x(),y());
fl_begin_complex_polygon();
fl_arc(args[0],args[1],args[2],args[3],args[4]);
fl_gap();
fl_arc(140,140,20,0,-360);
fl_end_complex_polygon();
fl_color(FL_RED);
fl_begin_line();
fl_arc(args[0],args[1],args[2],args[3],args[4]);
fl_end_line();
fl_pop_matrix();
fl_pop_clip();
}
public:
Drawing(int X,int Y,int W,int H) : Fl_Widget(X,Y,W,H) {}
};
Drawing *d;
void slider_cb(Fl_Widget* o, void* v) {
Fl_Slider* s = (Fl_Slider*)o;
args[long(v)] = s->value();
d->redraw();
}
int main(int argc, char** argv) {
Fl_Double_Window window(300,500);
Drawing drawing(10,10,280,280);
d = &drawing;
int y = 300;
for (int n = 0; n<6; n++) {
Fl_Slider* s = new Fl_Hor_Value_Slider(50,y,240,25,name[n]); y += 25;
if (n<3) {s->minimum(0); s->maximum(300);}
else if (n==5) {s->minimum(0); s->maximum(360);}
else {s->minimum(-360); s->maximum(360);}
s->step(1);
s->value(args[n]);
s->align(FL_ALIGN_LEFT);
s->callback(slider_cb, (void*)n);
}
window.end();
window.show(argc,argv);
return Fl::run();
}
//
// End of "$Id: arc.cxx 5519 2006-10-11 03:12:15Z mike $".
//
|