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     protected override bool draw_contents(Cairo.Context cr, Gdk.EventExpose event) {
  17         string str = "123| 45| 67890";
  18         text(cr, str, 20, 20, 20);
  19         Cairo.TextExtents ext = Cairo.TextExtents();
  20         cr.text_extents (str, ref ext);
  21
  22         Color line_color;
  23         Color.parse (text_color_default, out line_color);
  24         set_source_color (cr, line_color, 0.5);
  25
  26         cr.move_to (20, 20 + ext.y_bearing);
  27         cr.rel_line_to (0, ext.height);
  28         cr.stroke();
  29
  30         cr.move_to (20 + ext.x_advance + ext.x_bearing, 20 + ext.y_bearing);
  31         cr.rel_line_to (0, ext.height);
  32         cr.stroke();
  33
  34         cr.move_to (3, 29);
  35         cr.rel_line_to (width - 20, 0);
  36         cr.stroke();
  37         return false;
  38     }
  39
  40     private bool orig_size = true;
  41
  42     public void toggle_size() {
  43         stdout.printf("orig_size: %d\n", (int)orig_size);
  44         int new_width, new_height;
  45         if (orig_size) {
  46             new_width  = 291;
  47             new_height = 49;
  48             orig_size = false;
  49         } else {
  50             new_width  = 383;
  51             new_height = 72;
  52             orig_size = true;
  53         }
  54
  55         set_size_request (new_width, new_height);
  56     }
  57
  58     static int main (string[] args) {
  59         Gtk.init (ref args);
  60
  61         var window               = new Gtk.Window (Gtk.WindowType.TOPLEVEL);
  62         var vbox                 = new VBox(false, 2);
  63         var resize_button        = new Button.with_label("Resize");
  64         var alignment            = new Gtk.Alignment (0.5f, 0.5f, 0.5f, 0.5f);
  65         TestDisplay display      = new TestDisplay ();
  66
  67         alignment.bottom_padding = 10;
  68         alignment.top_padding    = 10;
  69         alignment.left_padding   = 10;
  70         alignment.right_padding  = 10;
  71         alignment.add (display);
  72         alignment.set_size_request(display.width + 20, display.height + 20);
  73
  74         resize_button.pressed += display.toggle_size;
  75         resize_button.set_size_request(100, 25);
  76
  77         vbox.add (alignment);
  78         vbox.add (resize_button);
  79
  80         window.add (vbox);
  81         window.destroy += Gtk.main_quit;
  82         window.show_all ();
  83         Gtk.main ();
  84         return 0;
  85     }
  86 }
  87
  88 } // namespace prolooks