test/arc.cxx

   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 {
  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:
  62   Drawing(int X,int Y,int W,int H) : Fl_Widget(X,Y,W,H) {}
  63 };
  64
  65 Drawing *d;
  66
  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
  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