prolooks/GlossGradientDemo.vala

   1 /*
   2     Copyright 2009 by Hans Baier
   3     License: LGPLv2+
   4 */
   5
   6 using Gtk;
   7
   8 namespace Prolooks {
   9
  10     public class GlossDemo : DrawingArea {
  11
  12         public GlossDemo () {
  13
  14             // Set favored widget size
  15             set_size_request (500, 100);
  16         }
  17
  18         /* Widget is asked to draw itself */
  19         public override bool expose_event (Gdk.EventExpose event) {
  20
  21             // Create a Cairo context
  22             var cr = Gdk.cairo_create (this.window);
  23
  24             // Set clipping area in order to avoid unnecessary drawing
  25             cr.rectangle (event.area.x, event.area.y,
  26                           event.area.width, event.area.height);
  27             cr.clip ();
  28
  29             set_source_color_string(cr, "#EDEDED");
  30             set_source_color(cr, style.bg[(int)Gtk.StateType.NORMAL]);
  31             cr.rectangle(0, 0, allocation.width, allocation.height);
  32             cr.fill();
  33
  34                         double padding = 5.0;
  35                         double glossbar_height = allocation.height - 2 * padding;
  36                         double glossbar_width  = (allocation.width - 2 * padding) / 5.0 ;
  37
  38             Cairo.Pattern gloss_red    = gloss_gradient_pattern(0.0, padding, 0.0, glossbar_height, cairo_color_from_string("#D84212"));
  39                         Cairo.Pattern gloss_green  = gloss_gradient_pattern(0.0, padding, 0.0, glossbar_height, cairo_color_from_string("#237000"));
  40                         Cairo.Pattern gloss_blue   = gloss_gradient_pattern(0.0, padding, 0.0, glossbar_height, cairo_color_from_string("#0081FF"));
  41                         Cairo.Pattern gloss_violet = gloss_gradient_pattern(0.0, padding, 0.0, glossbar_height, cairo_color_from_string("#9331AB"));
  42                         Cairo.Pattern gloss_gray   = gloss_gradient_pattern(0.0, padding, 0.0, glossbar_height, cairo_color_from_string("#5B5B57"));
  43
  44             cr.rectangle(padding, padding,  glossbar_width, glossbar_height);
  45             cr.set_source(gloss_blue);
  46             cr.fill();
  47
  48             cr.rectangle(padding + glossbar_width, padding,  glossbar_width, glossbar_height);
  49             cr.set_source(gloss_red);
  50             cr.fill();
  51
  52             cr.rectangle(padding + 2.0 * glossbar_width, padding,  glossbar_width, glossbar_height);
  53             cr.set_source(gloss_green);
  54             cr.fill();
  55
  56             cr.rectangle(padding + 3.0 * glossbar_width, padding,  glossbar_width, glossbar_height);
  57             cr.set_source(gloss_violet);
  58             cr.fill();
  59
  60             cr.rectangle(padding + 4.0 * glossbar_width, padding,  glossbar_width, glossbar_height);
  61             cr.set_source(gloss_gray);
  62             cr.fill();
  63
  64             return false;
  65         }
  66     }
  67
  68     static int main (string[] args) {
  69         int i, j;
  70         Gtk.init (ref args);
  71         var window = new Window (WindowType.TOPLEVEL);
  72
  73         var glossDemo = new GlossDemo();
  74
  75         window.add (glossDemo);
  76         window.destroy += Gtk.main_quit;
  77         window.show_all ();
  78         Gtk.main ();
  79         return 0;
  80     }
  81 }
  82
  83 } // namespace Prolooks