Pileus Git - ~andy/gtk/blob - demos/gtk-demo/theming_custom_css.c

   1 /* CSS Theming/Custom CSS :: fancy.css
   2  *
   3  * GTK+ uses CSS for theming. If required, applications can
   4  * install their own custom CSS style provider to achieve
   5  * special effects.
   6  *
   7  * Doing this has the downside that your application will no
   8  * longer react to the users theme preferences, so this should
   9  * be used sparingly.
  10  */
  11
  12 #include <gtk/gtk.h>
  13 #include "demo-common.h"
  14
  15 static GtkWidget *window = NULL;
  16
  17 GtkWidget *
  18 do_theming_custom_css (GtkWidget *do_widget)
  19 {
  20   GtkWidget *box;
  21   GtkWidget *button;
  22   GtkCssProvider *provider;
  23   GBytes *bytes;
  24
  25   if (!window)
  26     {
  27       window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  28       gtk_window_set_screen (GTK_WINDOW (window),
  29                              gtk_widget_get_screen (do_widget));
  30       gtk_window_set_title (GTK_WINDOW (window), "Custom CSS");
  31       gtk_container_set_border_width (GTK_CONTAINER (window), 18);
  32       g_signal_connect (window, "destroy",
  33                         G_CALLBACK (gtk_widget_destroyed), &window);
  34       box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
  35       gtk_container_add (GTK_CONTAINER (window), box);
  36       button = gtk_button_new_with_label ("Plain");
  37       gtk_box_pack_start (GTK_BOX (box), button, TRUE, TRUE, 0);
  38       button = gtk_button_new_with_label ("Fancy");
  39       gtk_box_pack_start (GTK_BOX (box), button, TRUE, TRUE, 0);
  40       gtk_widget_set_name (button, "fancy");
  41
  42       provider = gtk_css_provider_new ();
  43       bytes = g_resources_lookup_data ("/theming_custom_css/gtk.css", 0, NULL);
  44       gtk_css_provider_load_from_data (provider, g_bytes_get_data (bytes, NULL),
  45                                        g_bytes_get_size (bytes), NULL);
  46       gtk_style_context_add_provider_for_screen (gtk_widget_get_screen (do_widget),
  47                                                  GTK_STYLE_PROVIDER (provider),
  48                                                  GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
  49       g_object_unref (provider);
  50       g_bytes_unref (bytes);
  51
  52       gtk_widget_show_all (box);
  53     }
  54
  55   if (!gtk_widget_get_visible (window))
  56     {
  57       gtk_widget_show (window);
  58     }
  59   else
  60     {
  61       gtk_widget_destroy (window);
  62       window = NULL;
  63     }
  64
  65   return window;
  66 }