1 //
2 // "$Id: arc.cxx 7978 2010-12-08 14:00:35Z AlbrechtS $"
3 //
4 // Arc drawing test program for the Fast Light Tool Kit (FLTK).
5 //
6 // Copyright 1998-2010 by Bill Spitzak and others.
7 //
8 // This library is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU Library General Public
10 // License as published by the Free Software Foundation; either
11 // version 2 of the License, or (at your option) any later version.
12 //
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // Library General Public License for more details.
17 //
18 // You should have received a copy of the GNU Library General Public
19 // License along with this library; if not, write to the Free Software
20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
21 // USA.
22 //
23 // Please report all bugs and problems on the following page:
24 //
25 // http://www.fltk.org/str.php
26 //
27
28 #include <FL/Fl.H>
29 #include <FL/Fl_Double_Window.H>
30 #include <FL/Fl_Hor_Value_Slider.H>
31 #include <FL/fl_draw.H>
32
33 double args[6] = {140, 140, 50, 0, 360, 0};
34 const char* name[6] = {"X", "Y", "R", "start", "end", "rotate"};
35
36 class Drawing : public Fl_Widget {
draw()37 void draw() {
38 fl_push_clip(x(),y(),w(),h());
39 fl_color(FL_DARK3);
40 fl_rectf(x(),y(),w(),h());
41 fl_push_matrix();
42 if (args[5]) {
43 fl_translate(x()+w()/2.0, y()+h()/2.0);
44 fl_rotate(args[5]);
45 fl_translate(-(x()+w()/2.0), -(y()+h()/2.0));
46 }
47 fl_color(FL_WHITE);
48 fl_translate(x(),y());
49 fl_begin_complex_polygon();
50 fl_arc(args[0],args[1],args[2],args[3],args[4]);
51 fl_gap();
52 fl_arc(140,140,20,0,-360);
53 fl_end_complex_polygon();
54 fl_color(FL_RED);
55 fl_begin_line();
56 fl_arc(args[0],args[1],args[2],args[3],args[4]);
57 fl_end_line();
58 fl_pop_matrix();
59 fl_pop_clip();
60 }
61 public:
Drawing(int X,int Y,int W,int H)62 Drawing(int X,int Y,int W,int H) : Fl_Widget(X,Y,W,H) {}
63 };
64
65 Drawing *d;
66
slider_cb(Fl_Widget * o,void * v)67 void slider_cb(Fl_Widget* o, void* v) {
68 Fl_Slider* s = (Fl_Slider*)o;
69 args[fl_intptr_t(v)] = s->value();
70 d->redraw();
71 }
72
main(int argc,char ** argv)73 int main(int argc, char** argv) {
74 Fl_Double_Window window(300,500);
75 Drawing drawing(10,10,280,280);
76 d = &drawing;
77
78 int y = 300;
79 for (int n = 0; n<6; n++) {
80 Fl_Slider* s = new Fl_Hor_Value_Slider(50,y,240,25,name[n]); y += 25;
81 if (n<3) {s->minimum(0); s->maximum(300);}
82 else if (n==5) {s->minimum(0); s->maximum(360);}
83 else {s->minimum(-360); s->maximum(360);}
84 s->step(1);
85 s->value(args[n]);
86 s->align(FL_ALIGN_LEFT);
87 s->callback(slider_cb, (void*)n);
88 }
89
90 window.end();
91 window.show(argc,argv);
92 return Fl::run();
93 }
94
95
96 //
97 // End of "$Id: arc.cxx 7978 2010-12-08 14:00:35Z AlbrechtS $".
98 //
99
100