test/color_chooser.cxx

   1 //
   2 // "$Id: color_chooser.cxx 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Color chooser 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_Window.H>
  30 #include <FL/Fl_Box.H>
  31 #include <FL/Fl_Button.H>
  32 #include <FL/fl_show_colormap.H>
  33 #include <FL/Fl_Color_Chooser.H>
  34 #include <FL/Fl_Image.H>
  35 #include <FL/x.H>
  36 #include <FL/fl_draw.H>
  37
  38 #include <stdlib.h>
  39 #include <stdio.h>
  40 #if !defined(WIN32) && !defined(__APPLE__)
  41 #include "list_visuals.cxx"
  42 #endif
  43
  44 int width = 75;
  45 int height = 75;
  46 uchar *image;
  47
  48 void make_image() {
  49   image = new uchar[3*width*height];
  50   uchar *p = image;
  51   for (int y = 0; y < height; y++) {
  52     double Y = double(y)/(height-1);
  53     for (int x = 0; x < width; x++) {
  54       double X = double(x)/(width-1);
  55       *p++ = uchar(255*((1-X)*(1-Y))); // red in upper-left
  56       *p++ = uchar(255*((1-X)*Y));      // green in lower-left
  57       *p++ = uchar(255*(X*Y));  // blue in lower-right
  58     }
  59   }
  60 }
  61
  62 class Pens : public Fl_Box {
  63   void draw();
  64 public:
  65   Pens(int X, int Y, int W, int H, const char* L)
  66   : Fl_Box(X,Y,W,H,L) {}
  67 };
  68 void Pens::draw() {
  69   // use every color in the gray ramp:
  70   for (int i = 0; i < 3*8; i++) {
  71     fl_color((Fl_Color)(FL_GRAY_RAMP+i));
  72     fl_line(x()+i, y(), x()+i, y()+h());
  73   }
  74 }
  75
  76 Fl_Color c = FL_GRAY;
  77 #define fullcolor_cell (FL_FREE_COLOR)
  78
  79 void cb1(Fl_Widget *, void *v) {
  80   c = fl_show_colormap(c);
  81   Fl_Box* b = (Fl_Box*)v;
  82   b->color(c);
  83   b->parent()->redraw();
  84 }
  85
  86 void cb2(Fl_Widget *, void *v) {
  87   uchar r,g,b;
  88   Fl::get_color(c,r,g,b);
  89   if (!fl_color_chooser("New color:",r,g,b,3)) return;
  90   c = fullcolor_cell;
  91   Fl::set_color(fullcolor_cell,r,g,b);
  92   Fl_Box* bx = (Fl_Box*)v;
  93   bx->color(fullcolor_cell);
  94   bx->parent()->redraw();
  95 }
  96
  97 int main(int argc, char ** argv) {
  98   Fl::set_color(fullcolor_cell,145,159,170);
  99   Fl_Window window(400,400);
 100   Fl_Box box(50,50,300,300);
 101   box.box(FL_THIN_DOWN_BOX);
 102   c = fullcolor_cell;
 103   box.color(c);
 104   Fl_Button b1(140,120,120,30,"fl_show_colormap");
 105   b1.callback(cb1,&box);
 106   Fl_Button b2(140,160,120,30,"fl_choose_color");
 107   b2.callback(cb2,&box);
 108   Fl_Box image_box(140,200,120,120,0);
 109   make_image();
 110   (new Fl_RGB_Image(image, width, height))->label(&image_box);
 111   Fl_Box b(140,320,120,0,"Example of fl_draw_image()");
 112   Pens p(80,200,3*8,120,"lines");
 113   p.align(FL_ALIGN_TOP);
 114   int i = 1;
 115   if (!Fl::args(argc,argv,i) || i < argc-1) {
 116     printf("usage: %s <switches> visual-number\n"
 117            " - : default visual\n"
 118            " r : call Fl::visual(FL_RGB)\n"
 119            " c : call Fl::own_colormap()\n",argv[0]);
 120 #if !defined(WIN32) && !defined(__APPLE__)
 121     printf(" # : use this visual with an empty colormap:\n");
 122     list_visuals();
 123 #endif
 124     puts(Fl::help);
 125     exit(1);
 126   }
 127   if (i!=argc) {
 128     if (argv[i][0] == 'r') {
 129       if (!Fl::visual(FL_RGB)) printf("Fl::visual(FL_RGB) returned false.\n");
 130     } else if (argv[i][0] == 'c') {
 131       Fl::own_colormap();
 132     } else if (argv[i][0] != '-') {
 133 #if !defined(WIN32) && !defined(__APPLE__)
 134       int visid = atoi(argv[i]);
 135       fl_open_display();
 136       XVisualInfo templt; int num;
 137       templt.visualid = visid;
 138       fl_visual = XGetVisualInfo(fl_display, VisualIDMask, &templt, &num);
 139       if (!fl_visual) Fl::fatal("No visual with id %d",visid);
 140       fl_colormap = XCreateColormap(fl_display, RootWindow(fl_display,fl_screen),
 141                                     fl_visual->visual, AllocNone);
 142       fl_xpixel(FL_BLACK); // make sure black is allocated
 143 #else
 144       Fl::fatal("Visual id's not supported on MSWindows or MacOS.");
 145 #endif
 146     }
 147   }
 148   window.show(argc,argv);
 149   return Fl::run();
 150 }
 151
 152 //
 153 // End of "$Id: color_chooser.cxx 7903 2010-11-28 21:06:39Z matt $".
 154 //