test/curve.cxx

   1 //
   2 // "$Id: curve.cxx 7978 2010-12-08 14:00:35Z AlbrechtS $"
   3 //
   4 // Curve 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 #include <FL/Fl_Toggle_Button.H>
  33
  34 double args[9] = {
  35   20,20, 50,200, 100,20, 200,200, 0};
  36 const char* name[9] = {
  37   "X0", "Y0", "X1", "Y1", "X2", "Y2", "X3", "Y3", "rotate"};
  38
  39 int points;
  40
  41 class Drawing : public Fl_Widget {
  42   void draw() {
  43     fl_push_clip(x(),y(),w(),h());
  44     fl_color(FL_DARK3);
  45     fl_rectf(x(),y(),w(),h());
  46     fl_push_matrix();
  47     if (args[8]) {
  48       fl_translate(x()+w()/2.0, y()+h()/2.0);
  49       fl_rotate(args[8]);
  50       fl_translate(-(x()+w()/2.0), -(y()+h()/2.0));
  51     }
  52     fl_translate(x(),y());
  53     if (!points) {
  54     fl_color(FL_WHITE);
  55     fl_begin_complex_polygon();
  56    fl_curve(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
  57     fl_end_complex_polygon();
  58     }
  59     fl_color(FL_BLACK);
  60     fl_begin_line();
  61     fl_vertex(args[0],args[1]);
  62     fl_vertex(args[2],args[3]);
  63     fl_vertex(args[4],args[5]);
  64     fl_vertex(args[6],args[7]);
  65     fl_end_line();
  66     fl_color(points ? FL_WHITE : FL_RED);
  67     points ? fl_begin_points() : fl_begin_line();
  68    fl_curve(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
  69     points ? fl_end_points() : fl_end_line();
  70     fl_pop_matrix();
  71     fl_pop_clip();
  72   }
  73 public:
  74   Drawing(int X,int Y,int W,int H) : Fl_Widget(X,Y,W,H) {}
  75 };
  76
  77 Drawing *d;
  78
  79 void points_cb(Fl_Widget* o, void*) {
  80   points = ((Fl_Toggle_Button*)o)->value();
  81   d->redraw();
  82 }
  83
  84 void slider_cb(Fl_Widget* o, void* v) {
  85   Fl_Slider* s = (Fl_Slider*)o;
  86   args[fl_intptr_t(v)] = s->value();
  87   d->redraw();
  88 }
  89
  90 int main(int argc, char** argv) {
  91   Fl_Double_Window window(300,555);
  92   Drawing drawing(10,10,280,280);
  93   d = &drawing;
  94
  95   int y = 300;
  96   for (int n = 0; n<9; n++) {
  97     Fl_Slider* s = new Fl_Hor_Value_Slider(50,y,240,25,name[n]); y += 25;
  98     s->minimum(0); s->maximum(280);
  99     if (n == 8) s->maximum(360);
 100     s->step(1);
 101     s->value(args[n]);
 102     s->align(FL_ALIGN_LEFT);
 103     s->callback(slider_cb, (void*)n);
 104   }
 105   Fl_Toggle_Button but(50,y,50,25,"points");
 106   but.callback(points_cb);
 107
 108   window.end();
 109   window.show(argc,argv);
 110   return Fl::run();
 111 }
 112
 113 //
 114 // End of "$Id: curve.cxx 7978 2010-12-08 14:00:35Z AlbrechtS $".
 115 //