1 /* CSS Theming/Animated backgrounds
3 * This demo is done in honour of the Pixbufs demo further down. It is done exclusively
4 * with CSS as the background of the window.
9 static GtkWidget *window = NULL;
12 show_parsing_error (GtkCssProvider *provider,
13 GtkCssSection *section,
15 GtkTextBuffer *buffer)
17 GtkTextIter start, end;
20 gtk_text_buffer_get_iter_at_line_index (buffer,
22 gtk_css_section_get_start_line (section),
23 gtk_css_section_get_start_position (section));
24 gtk_text_buffer_get_iter_at_line_index (buffer,
26 gtk_css_section_get_end_line (section),
27 gtk_css_section_get_end_position (section));
29 if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED))
34 gtk_text_buffer_apply_tag_by_name (buffer, tag_name, &start, &end);
38 css_text_changed (GtkTextBuffer *buffer,
39 GtkCssProvider *provider)
41 GtkTextIter start, end;
44 gtk_text_buffer_get_start_iter (buffer, &start);
45 gtk_text_buffer_get_end_iter (buffer, &end);
46 gtk_text_buffer_remove_all_tags (buffer, &start, &end);
48 text = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
49 gtk_css_provider_load_from_data (provider, text, -1, NULL);
52 gtk_style_context_reset_widgets (gdk_screen_get_default ());
56 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
58 gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
59 if (GTK_IS_CONTAINER (widget))
60 gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
64 do_css_pixbufs (GtkWidget *do_widget)
68 GtkWidget *paned, *container, *child;
69 GtkStyleProvider *provider;
73 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
74 gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
75 gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
76 g_signal_connect (window, "destroy",
77 G_CALLBACK (gtk_widget_destroyed), &window);
79 paned = gtk_paned_new (GTK_ORIENTATION_VERTICAL);
80 gtk_container_add (GTK_CONTAINER (window), paned);
82 /* Need a filler so we get a handle */
83 child = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
84 gtk_container_add (GTK_CONTAINER (paned), child);
86 text = gtk_text_buffer_new (NULL);
87 gtk_text_buffer_create_tag (text,
89 "underline", PANGO_UNDERLINE_SINGLE,
91 gtk_text_buffer_create_tag (text,
93 "underline", PANGO_UNDERLINE_ERROR,
96 provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
98 container = gtk_scrolled_window_new (NULL, NULL);
99 gtk_container_add (GTK_CONTAINER (paned), container);
100 child = gtk_text_view_new_with_buffer (text);
101 gtk_container_add (GTK_CONTAINER (container), child);
102 g_signal_connect (text,
104 G_CALLBACK (css_text_changed),
107 bytes = g_resources_lookup_data ("/css_pixbufs/gtk.css", 0, NULL);
108 gtk_text_buffer_set_text (text, g_bytes_get_data (bytes, NULL), g_bytes_get_size (bytes));
109 g_bytes_unref (bytes);
111 g_signal_connect (provider,
113 G_CALLBACK (show_parsing_error),
114 gtk_text_view_get_buffer (GTK_TEXT_VIEW (child)));
116 apply_css (window, provider);
119 if (!gtk_widget_get_visible (window))
120 gtk_widget_show_all (window);
123 gtk_widget_destroy (window);