prolooks/DisplayDemo.vala

   1 /*
   2     Copyright 2009 by Hans Baier
   3     License: LGPLv2+
   4 */
   5
   6 using Gtk;
   7 using Gdk;
   8
   9 namespace Prolooks {
  10
  11 public class TestDisplay : DisplayBase {
  12     public TestDisplay() {
  13          set_size_request (width, height);
  14     }
  15
  16     /* Mouse button got pressed over widget */
  17     public override bool button_press_event (Gdk.EventButton event) {
  18         stdout.printf("Button %u pressed on (%f,%f)\n", event.button, event.x, event.y );
  19         return false;
  20     }
  21
  22     /* Mouse button got released */
  23     public override bool button_release_event (Gdk.EventButton event) {
  24         stdout.printf("Button %u released over (%f,%f)\n", event.button, event.x, event.y );
  25         return false;
  26     }
  27
  28     /* Mouse pointer moved over widget */
  29     public override bool motion_notify_event (Gdk.EventMotion event) {
  30         stdout.printf("Motion over (%f,%f)\n", event.x, event.y );
  31         return false;
  32     }
  33
  34     protected override bool draw_contents(Cairo.Context cr, Gdk.EventExpose event) {
  35         string str = "123| 45| 67890";
  36         text(cr, str, 20, 20, 20);
  37         Cairo.TextExtents ext = Cairo.TextExtents();
  38         cr.text_extents (str, ref ext);
  39
  40         Color line_color;
  41         Color.parse (text_color_default, out line_color);
  42         set_source_color (cr, line_color, 0.5);
  43
  44         cr.move_to (20, 20 + ext.y_bearing);
  45         cr.rel_line_to (0, ext.height);
  46         cr.stroke();
  47
  48         cr.move_to (20 + ext.x_advance + ext.x_bearing, 20 + ext.y_bearing);
  49         cr.rel_line_to (0, ext.height);
  50         cr.stroke();
  51
  52         cr.move_to (3, 29);
  53         cr.rel_line_to (width - 20, 0);
  54         cr.stroke();
  55         return false;
  56     }
  57
  58     private bool orig_size = true;
  59
  60     public void toggle_size() {
  61         stdout.printf("orig_size: %d\n", (int)orig_size);
  62         if (orig_size) {
  63             width  = 291;
  64             height = 49;
  65             orig_size = false;
  66         } else {
  67             width  = 383;
  68             height = 72;
  69             orig_size = true;
  70         }
  71
  72         set_size_request (width, height);
  73     }
  74
  75     static int main (string[] args) {
  76         Gtk.init (ref args);
  77
  78         var window               = new Gtk.Window (Gtk.WindowType.TOPLEVEL);
  79         var vbox                 = new VBox(false, 2);
  80         var resize_button        = new Button.with_label("Resize");
  81         var alignment            = new Gtk.Alignment (0.5f, 0.5f, 0.5f, 0.5f);
  82         TestDisplay display      = new TestDisplay ();
  83
  84         alignment.bottom_padding = 10;
  85         alignment.top_padding    = 10;
  86         alignment.left_padding   = 10;
  87         alignment.right_padding  = 10;
  88         alignment.add (display);
  89         alignment.set_size_request(display.width + 20, display.height + 20);
  90
  91         resize_button.pressed += display.toggle_size;
  92         resize_button.set_size_request(100, 25);
  93
  94         vbox.add (alignment);
  95         vbox.add (resize_button);
  96
  97         window.add (vbox);
  98         window.destroy += Gtk.main_quit;
  99         window.show_all ();
 100         Gtk.main ();
 101         return 0;
 102     }
 103 }
 104
 105 } // namespace prolooks