demo/ldim.c

   1 #include <adg/adg.h>
   2 #include <gcontainer/gcontainer.h>
   3 #include <gtk/gtk.h>
   4
   5
   6 static void     draw_shape              (AdgPath        *path);
   7 static void     drawing_expose          (GtkWidget      *widget,
   8                                          GdkEventExpose *event,
   9                                          AdgCanvas      *canvas);
  10
  11
  12 int
  13 main(gint argc, gchar ** argv)
  14 {
  15     GtkWidget *window;
  16     GtkWidget *widget;
  17     AdgCanvas *canvas;
  18     AdgEntity *entity;
  19
  20     gtk_init(&argc, &argv);
  21
  22     /* Create the canvas */
  23     canvas = adg_canvas_new();
  24
  25     /* Add the shape to quote */
  26     entity = adg_path_new(ADG_CALLBACK(draw_shape), NULL);
  27     adg_container_add(ADG_CONTAINER(canvas), entity);
  28
  29     /* Add the north quotes */
  30     entity = adg_ldim_new_full_explicit(2., -10., 8., -10., CPML_DIR_UP,
  31                                         0.0, -10.);
  32     adg_container_add(ADG_CONTAINER(canvas), entity);
  33
  34     entity = adg_ldim_new_full_explicit(0., -5., 10., -5., CPML_DIR_UP,
  35                                         0.0, -10.);
  36     adg_dim_set_level(ADG_DIM(entity), 2);
  37     adg_container_add(ADG_CONTAINER(canvas), entity);
  38
  39     /* User interface stuff */
  40     window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  41     g_signal_connect(window, "delete-event", G_CALLBACK(gtk_main_quit), NULL);
  42
  43     widget = gtk_drawing_area_new();
  44     g_signal_connect(widget, "expose-event", G_CALLBACK(drawing_expose),
  45                      canvas);
  46     gtk_container_add(GTK_CONTAINER(window), widget);
  47
  48     gtk_widget_show_all(window);
  49     gtk_main();
  50
  51     return 0;
  52 }
  53
  54 static void
  55 draw_shape(AdgPath *path)
  56 {
  57     adg_path_move_to(path, 0., 0.);
  58     adg_path_line_to(path, 0., -5.);
  59     adg_path_line_to(path, 2., -5.);
  60     adg_path_line_to(path, 2., -10.);
  61     adg_path_line_to(path, 8., -10.);
  62     adg_path_line_to(path, 8., -5.);
  63     adg_path_line_to(path, 10., -5.);
  64     adg_path_line_to(path, 10., 0.);
  65     adg_path_close(path);
  66 }
  67
  68 static void
  69 drawing_expose(GtkWidget *widget, GdkEventExpose *event, AdgCanvas *canvas)
  70 {
  71     cairo_t *cr;
  72     gint width, height;
  73     double scale;
  74     AdgMatrix matrix;
  75
  76     cr = gdk_cairo_create(widget->window);
  77     width = widget->allocation.width;
  78     height = widget->allocation.height;
  79     scale = (double) (width - 10.) / 10.;
  80
  81     cairo_matrix_init(&matrix, scale, 0., 0., scale, 5.,
  82                       75. + 10. * scale);
  83     adg_container_set_model_transformation(ADG_CONTAINER(canvas), &matrix);
  84
  85     /* Rendering process */
  86     adg_entity_render(ADG_ENTITY(canvas), cr);
  87
  88     cairo_destroy(cr);
  89 }