test/line_style.cxx

   1 //
   2 // "$Id: line_style.cxx 7982 2010-12-08 23:58:32Z AlbrechtS $"
   3 //
   4 // Line style demo for the Fast Light Tool Kit (FLTK).
   5 //
   6 // Copyright 2000-2010 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_Value_Slider.H>
  31 #include <FL/fl_draw.H>
  32 #include <FL/Fl_Choice.H>
  33 #include <FL/Fl_Check_Button.H>
  34 #include <FL/Fl_Box.H>
  35
  36 Fl_Double_Window *form;
  37 Fl_Slider *sliders[9];
  38 Fl_Choice *choice[3];
  39 Fl_Check_Button *draw_line;
  40
  41 class test_box: public Fl_Double_Window {
  42   void draw();
  43 public:
  44   test_box(int x,int y,int w,int h,const char *l=0)
  45     : Fl_Double_Window(x,y,w,h,l) {}
  46 }*test;
  47
  48 void test_box::draw() {
  49   Fl_Double_Window::draw();
  50   fl_color((uchar)(sliders[0]->value()),
  51            (uchar)(sliders[1]->value()),
  52            (uchar)(sliders[2]->value()));
  53   // dashes
  54   char dashes[5];
  55   dashes[0] = char(sliders[5]->value());
  56   dashes[1] = char(sliders[6]->value());
  57   dashes[2] = char(sliders[7]->value());
  58   dashes[3] = char(sliders[8]->value());
  59   dashes[4] = 0;
  60   fl_line_style(
  61     choice[0]->mvalue()->argument() +
  62     choice[1]->mvalue()->argument() +
  63     choice[2]->mvalue()->argument(),
  64     long(sliders[3]->value()),          // width
  65     dashes);
  66
  67   // draw the defined fl_rect and fl_vertex first and then
  68   // the additional one-pixel line, if enabled
  69   // sliders[4] = x/y coordinate translation (default = 10)
  70
  71   for (int i=0; i<draw_line->value()+1; i++) {
  72     int move = (int)sliders[4]->value();
  73     fl_rect(move,move,w()-20,h()-20);
  74     fl_begin_line();
  75     fl_vertex(move+25, move+25);
  76     fl_vertex(w()-45+move, h()-45+move);
  77     fl_vertex(w()-50+move, move+25);
  78     fl_vertex(move+25, h()/2-10+move);
  79     fl_end_line();
  80     // you must reset the line type when done:
  81     fl_line_style(FL_SOLID);
  82     fl_color(FL_BLACK);
  83   }
  84 }
  85
  86 Fl_Menu_Item style_menu[] = {
  87   {"FL_SOLID",  0, 0, (void*)FL_SOLID},
  88   {"FL_DASH",   0, 0, (void*)FL_DASH},
  89   {"FL_DOT",    0, 0, (void*)FL_DOT},
  90   {"FL_DASHDOT",0, 0, (void*)FL_DASHDOT},
  91   {"FL_DASHDOTDOT", 0, 0, (void*)FL_DASHDOTDOT},
  92   {0}
  93 };
  94
  95 Fl_Menu_Item cap_menu[] = {
  96   {"default",           0, 0, 0},
  97   {"FL_CAP_FLAT",       0, 0, (void*)FL_CAP_FLAT},
  98   {"FL_CAP_ROUND",      0, 0, (void*)FL_CAP_ROUND},
  99   {"FL_CAP_SQUARE",     0, 0, (void*)FL_CAP_SQUARE},
 100   {0}
 101 };
 102
 103 Fl_Menu_Item join_menu[] = {
 104   {"default",           0, 0, 0},
 105   {"FL_JOIN_MITER",     0, 0, (void*)FL_JOIN_MITER},
 106   {"FL_JOIN_ROUND",     0, 0, (void*)FL_JOIN_ROUND},
 107   {"FL_JOIN_BEVEL",     0, 0, (void*)FL_JOIN_BEVEL},
 108   {0}
 109 };
 110
 111 void do_redraw(Fl_Widget*,void*)
 112 {
 113     test->redraw();
 114 }
 115
 116 void makeform(const char *) {
 117   form = new Fl_Double_Window(500,250,"fl_line_style() test");
 118   sliders[0]= new Fl_Value_Slider(280,10,180,20,"R");
 119   sliders[0]->bounds(0,255);
 120   sliders[1]= new Fl_Value_Slider(280,30,180,20,"G");
 121   sliders[1]->bounds(0,255);
 122   sliders[2]= new Fl_Value_Slider(280,50,180,20,"B");
 123   sliders[2]->bounds(0,255);
 124   choice[0]= new Fl_Choice(280,70,180,20,"Style");
 125   choice[0]->menu(style_menu);
 126   choice[1]= new Fl_Choice(280,90,180,20,"Cap");
 127   choice[1]->menu(cap_menu);
 128   choice[2]= new Fl_Choice(280,110,180,20,"Join");
 129   choice[2]->menu(join_menu);
 130   sliders[3]= new Fl_Value_Slider(280,130,180,20,"Width");
 131   sliders[3]->bounds(0,20);
 132   sliders[4]= new Fl_Value_Slider(280,150,180,20,"Move");
 133   sliders[4]->bounds(-10,20);
 134   draw_line = new Fl_Check_Button(280,170,20,20,"&Line");
 135   draw_line->align(FL_ALIGN_LEFT);
 136   new Fl_Box (305,170,160,20,"add a 1-pixel black line");
 137   sliders[5] = new Fl_Slider(200,210,70,20,"Dash");
 138   sliders[5]->align(FL_ALIGN_TOP_LEFT);
 139   sliders[5]->bounds(0,40);
 140   sliders[6] = new Fl_Slider(270,210,70,20);
 141   sliders[6]->bounds(0,40);
 142   sliders[7] = new Fl_Slider(340,210,70,20);
 143   sliders[7]->bounds(0,40);
 144   sliders[8] = new Fl_Slider(410,210,70,20);
 145   sliders[8]->bounds(0,40);
 146   int i;
 147   for (i=0;i<9;i++) {
 148     sliders[i]->type(1);
 149     if (i<5) sliders[i]->align(FL_ALIGN_LEFT);
 150     sliders[i]->callback((Fl_Callback*)do_redraw);
 151     sliders[i]->step(1);
 152   }
 153   sliders[0]->value(255); // R
 154   sliders[1]->value(100); // G
 155   sliders[2]->value(100); // B
 156   sliders[4]->value(10);  // move line coordinates
 157   draw_line->value(0);
 158   draw_line->callback((Fl_Callback*)do_redraw);
 159   for (i=0;i<3;i++) {
 160     choice[i]->value(0);
 161     choice[i]->callback((Fl_Callback*)do_redraw);
 162   }
 163   test = new test_box(0,0,200,200);
 164   test->end();
 165   form->resizable(test);
 166   form->end();
 167 }
 168
 169 int main(int argc, char **argv) {
 170   makeform(argv[0]);
 171   form->show(argc,argv);
 172   return Fl::run();
 173 }
 174
 175 //
 176 // End of "$Id: line_style.cxx 7982 2010-12-08 23:58:32Z AlbrechtS $".
 177 //