1/* Text View/Markup
2 * #Keywords: GtkTextView
3 *
4 * GtkTextBuffer lets you define your own tags that can influence
5 * text formatting in a variety of ways. In this example, we show
6 * that GtkTextBuffer can load Pango markup and automatically generate
7 * suitable tags.
8 */
9
10#include <gtk/gtk.h>
11
12static GtkWidget *stack;
13static GtkWidget *view;
14static GtkWidget *view2;
15
16static void
17source_toggled (GtkCheckButton *button)
18{
19 if (gtk_check_button_get_active (self: button))
20 gtk_stack_set_visible_child_name (GTK_STACK (stack), name: "source");
21 else
22 {
23 GtkTextBuffer *buffer;
24 GtkTextIter start, end;
25 char *markup;
26
27 buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view2));
28 gtk_text_buffer_get_bounds (buffer, start: &start, end: &end);
29 markup = gtk_text_buffer_get_text (buffer, start: &start, end: &end, FALSE);
30
31 buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
32 gtk_text_buffer_get_bounds (buffer, start: &start, end: &end);
33 gtk_text_buffer_begin_irreversible_action (buffer);
34 gtk_text_buffer_delete (buffer, start: &start, end: &end);
35 gtk_text_buffer_insert_markup (buffer, iter: &start, markup, len: -1);
36 gtk_text_buffer_end_irreversible_action (buffer);
37 g_free (mem: markup);
38
39 gtk_stack_set_visible_child_name (GTK_STACK (stack), name: "formatted");
40 }
41}
42
43GtkWidget *
44do_markup (GtkWidget *do_widget)
45{
46 static GtkWidget *window = NULL;
47
48 if (!window)
49 {
50 GtkWidget *sw;
51 GtkTextBuffer *buffer;
52 GtkTextIter iter;
53 GBytes *bytes;
54 const char *markup;
55 GtkWidget *header;
56 GtkWidget *show_source;
57
58 window = gtk_window_new ();
59 gtk_window_set_display (GTK_WINDOW (window),
60 display: gtk_widget_get_display (widget: do_widget));
61 gtk_window_set_default_size (GTK_WINDOW (window), width: 600, height: 680);
62 g_object_add_weak_pointer (G_OBJECT (window), weak_pointer_location: (gpointer *)&window);
63
64 stack = gtk_stack_new ();
65 gtk_widget_show (widget: stack);
66 gtk_window_set_child (GTK_WINDOW (window), child: stack);
67
68 show_source = gtk_check_button_new_with_label (label: "Source");
69 gtk_widget_set_valign (widget: show_source, align: GTK_ALIGN_CENTER);
70 g_signal_connect (show_source, "toggled", G_CALLBACK (source_toggled), stack);
71
72 header = gtk_header_bar_new ();
73 gtk_header_bar_pack_start (GTK_HEADER_BAR (header), child: show_source);
74 gtk_window_set_titlebar (GTK_WINDOW (window), titlebar: header);
75
76 gtk_window_set_title (GTK_WINDOW (window), title: "Markup");
77
78 view = gtk_text_view_new ();
79 gtk_text_view_set_editable (GTK_TEXT_VIEW (view), FALSE);
80 gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (view), wrap_mode: GTK_WRAP_WORD_CHAR);
81 gtk_text_view_set_left_margin (GTK_TEXT_VIEW (view), left_margin: 10);
82 gtk_text_view_set_right_margin (GTK_TEXT_VIEW (view), right_margin: 10);
83
84 sw = gtk_scrolled_window_new ();
85 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
86 hscrollbar_policy: GTK_POLICY_AUTOMATIC,
87 vscrollbar_policy: GTK_POLICY_AUTOMATIC);
88 gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), child: view);
89
90 gtk_stack_add_named (GTK_STACK (stack), child: sw, name: "formatted");
91
92 view2 = gtk_text_view_new ();
93 gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (view2), wrap_mode: GTK_WRAP_WORD);
94 gtk_text_view_set_left_margin (GTK_TEXT_VIEW (view2), left_margin: 10);
95 gtk_text_view_set_right_margin (GTK_TEXT_VIEW (view2), right_margin: 10);
96
97 sw = gtk_scrolled_window_new ();
98 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
99 hscrollbar_policy: GTK_POLICY_AUTOMATIC,
100 vscrollbar_policy: GTK_POLICY_AUTOMATIC);
101 gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), child: view2);
102
103 gtk_stack_add_named (GTK_STACK (stack), child: sw, name: "source");
104
105 bytes = g_resources_lookup_data (path: "/markup/markup.txt", lookup_flags: 0, NULL);
106 markup = (const char *)g_bytes_get_data (bytes, NULL);
107
108 buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
109 gtk_text_buffer_get_start_iter (buffer, iter: &iter);
110 gtk_text_buffer_begin_irreversible_action (buffer);
111 gtk_text_buffer_insert_markup (buffer, iter: &iter, markup, len: -1);
112 gtk_text_buffer_end_irreversible_action (buffer);
113
114 buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view2));
115 gtk_text_buffer_get_start_iter (buffer, iter: &iter);
116 gtk_text_buffer_begin_irreversible_action (buffer);
117 gtk_text_buffer_insert (buffer, iter: &iter, text: markup, len: -1);
118 gtk_text_buffer_end_irreversible_action (buffer);
119
120 g_bytes_unref (bytes);
121
122 gtk_widget_show (widget: stack);
123 }
124
125 if (!gtk_widget_get_visible (widget: window))
126 gtk_widget_show (widget: window);
127 else
128 gtk_window_destroy (GTK_WINDOW (window));
129
130 return window;
131}
132

source code of gtk/demos/gtk-demo/markup.c