prolooks/ValueDisplay.vala

   1 /*
   2     Copyright 2009 by Hans Baier
   3     License: LGPLv2+
   4 */
   5
   6 using Gtk;
   7
   8 namespace Prolooks {
   9
  10 public class ValueDisplay : DrawingArea {
  11
  12     private string _text = "";
  13     public string text {
  14         set {
  15             if (_text != value) {
  16                 _text = value;
  17                 queue_draw ();
  18             }
  19         }
  20         get {
  21             return _text;
  22         }
  23     }
  24
  25     public bool show_matrix {get; set;}
  26
  27     private int width  = 36;
  28     private int height = 16;
  29
  30     construct {
  31         set_size_request (width, height);
  32         show_matrix = true;
  33     }
  34
  35     /* Widget is asked to draw itself */
  36     public override bool expose_event (Gdk.EventExpose event) {
  37         //Gdk.Color test_color = color_from_string ("#ff0000");
  38
  39         width  = allocation.width;
  40         height = allocation.height;
  41
  42         // Create a Cairo context
  43         var cr = Gdk.cairo_create (this.window);
  44
  45         // Set clipping area in order to avoid unnecessary drawing
  46         cr.rectangle (event.area.x, event.area.y,
  47                       event.area.width, event.area.height);
  48         cr.clip ();
  49
  50         DisplayBase.outer_rim_for_display (cr, 0, 0, width, height, style.bg[Gtk.StateType.SELECTED]);
  51
  52         cr.translate (3, 3);
  53
  54         var inner_width  = width  - 6;
  55         var inner_height = height - 6;
  56
  57         if (show_matrix) {
  58             DisplayBase.dot_matrix (cr, 0.5, 0.5, inner_width, inner_height, DisplayBase.matrix_dot_color ());
  59         }
  60
  61         DisplayBase.lcd(cr, inner_width, inner_height, 3.0);
  62
  63         // draw text
  64         double font_size         = inner_height;
  65
  66         cr.select_font_face ("FreeSans", Cairo.FontSlant.NORMAL, Cairo.FontWeight.NORMAL);
  67         cr.set_font_size (font_size);
  68         Cairo.TextExtents ext = Cairo.TextExtents();
  69         cr.text_extents (text, ref ext);
  70         double x = (inner_width - ext.x_advance) / 2.0;
  71         double y = inner_height * 0.85;
  72
  73         DisplayBase.text (cr, text, x, y, font_size);
  74
  75         DisplayBase.reflection(cr, inner_width, inner_height);
  76
  77         return false;
  78     }
  79 }
  80
  81 } // namespace Prolooks
  82