prolooks/IKnobImageSource.vala

   1 /*
   2     Copyright 2009 by Hans Baier
   3     License: LGPLv2+
   4 */
   5
   6 using Gtk;
   7
   8 namespace Prolooks {
   9
  10     public interface IKnobImageSource : GLib.Object {
  11         public int variants {
  12             get {
  13                 return (int)KnobMode.ENDLESS + 1;
  14             }
  15         }
  16
  17         public int phases {
  18             get {
  19                 return 65;
  20             }
  21         }
  22
  23         public abstract double get_knob_width ();
  24
  25         public abstract double get_knob_height ();
  26
  27         public abstract double get_line_width ();
  28
  29         public abstract double get_radius ();
  30
  31         public void paint_knobs (Cairo.Context cr, KnobMode knob_mode, double first_x, double first_y) {
  32             var x = first_x;
  33             var y = first_y;
  34             for (var phase = 0; phase < phases; phase++) {
  35                 paint_knob (cr, knob_mode, phase, get_line_width (), get_radius (), x, y);
  36                 x += get_knob_width ();
  37             }
  38         }
  39
  40         public abstract void paint_knob (Cairo.Context cr, KnobMode knob_mode, int phase,  double lwidth, double radius, double x, double y);
  41     }
  42 }
  43
  44 } // namespace Prolooks