demo/ldim.c

   1 #include <adg/adg.h>
   2 #include <gcontainer/gcontainer.h>
   3 #include <gtk/gtk.h>
   4
   5 static void draw_shape          (AdgPath        *path);
   6 static void drawing_expose      (GtkWidget      *widget,
   7                                  GdkEventExpose *event,
   8                                  AdgCanvas      *canvas);
   9
  10 int
  11 main (gint argc, gchar **argv)
  12 {
  13   GtkWidget *window;
  14   GtkWidget *widget;
  15   AdgCanvas *canvas;
  16   AdgEntity *entity;
  17
  18   gtk_init (&argc, &argv);
  19
  20   /* Create the canvas */
  21   canvas = adg_canvas_new ();
  22
  23   /* Add the shape to quote */
  24   entity = adg_path_new (ADG_CALLBACK (draw_shape), NULL);
  25   g_containerable_add (G_CONTAINERABLE (canvas), G_CHILDABLE (entity));
  26
  27   /* Add the north quotes */
  28   entity = adg_ldim_new_full_explicit (2., -10., 8., -10., CPML_DIR_UP, 0.0, -10.);
  29   g_containerable_add (G_CONTAINERABLE (canvas), G_CHILDABLE (entity));
  30
  31   entity = adg_ldim_new_full_explicit (0., -5., 10., -5., CPML_DIR_UP, 0.0, -10.);
  32   adg_dim_set_level (ADG_DIM (entity), 2);
  33   g_containerable_add (G_CONTAINERABLE (canvas), G_CHILDABLE (entity));
  34
  35   /* User interface stuff */
  36   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  37   g_signal_connect (window, "delete-event", G_CALLBACK (gtk_main_quit), NULL);
  38
  39   widget = gtk_drawing_area_new ();
  40   g_signal_connect (widget, "expose-event", G_CALLBACK (drawing_expose), canvas);
  41   gtk_container_add (GTK_CONTAINER (window), widget);
  42
  43   gtk_widget_show_all (window);
  44   gtk_main ();
  45
  46   return 0;
  47 }
  48
  49 static void
  50 draw_shape (AdgPath *path)
  51 {
  52   adg_path_move_to (path, 0., 0.);
  53   adg_path_line_to (path, 0., -5.);
  54   adg_path_line_to (path, 2., -5.);
  55   adg_path_line_to (path, 2., -10.);
  56   adg_path_line_to (path, 8., -10.);
  57   adg_path_line_to (path, 8., -5.);
  58   adg_path_line_to (path, 10., -5.);
  59   adg_path_line_to (path, 10., 0.);
  60   adg_path_close (path);
  61 }
  62
  63 static void
  64 drawing_expose (GtkWidget      *widget,
  65                 GdkEventExpose *event,
  66                 AdgCanvas      *canvas)
  67 {
  68   cairo_t      *cr;
  69   gint          width, height;
  70   double        scale;
  71   AdgMatrix     matrix;
  72
  73   cr = gdk_cairo_create (widget->window);
  74   width  = widget->allocation.width;
  75   height = widget->allocation.height;
  76   scale = (double) (width - 10.) / 10.;
  77
  78   cairo_matrix_init (&matrix, scale, 0., 0., scale, 5., 75. + 10.*scale);
  79   adg_container_set_model_transformation (ADG_CONTAINER (canvas), &matrix);
  80
  81   /* Rendering process */
  82   adg_entity_render (ADG_ENTITY (canvas), cr);
  83
  84   cairo_destroy (cr);
  85 }