mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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131 lines
4.5 KiB
C
131 lines
4.5 KiB
C
/* Text View/Markup
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*
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* GtkTextBuffer lets you define your own tags that can influence
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* text formatting in a variety of ways. In this example, we show
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* that GtkTextBuffer can load Pango markup and automatically generate
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* suitable tags.
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*/
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#include <gtk/gtk.h>
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static GtkWidget *stack;
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static GtkWidget *view;
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static GtkWidget *view2;
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static void
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source_toggled (GtkToggleButton *button)
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{
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if (gtk_toggle_button_get_active (button))
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gtk_stack_set_visible_child_name (GTK_STACK (stack), "source");
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else
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{
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GtkTextBuffer *buffer;
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GtkTextIter start, end;
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gchar *markup;
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buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view2));
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gtk_text_buffer_get_bounds (buffer, &start, &end);
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markup = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
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buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
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gtk_text_buffer_get_bounds (buffer, &start, &end);
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gtk_text_buffer_begin_irreversible_action (buffer);
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gtk_text_buffer_delete (buffer, &start, &end);
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gtk_text_buffer_insert_markup (buffer, &start, markup, -1);
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gtk_text_buffer_end_irreversible_action (buffer);
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g_free (markup);
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gtk_stack_set_visible_child_name (GTK_STACK (stack), "formatted");
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}
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}
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GtkWidget *
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do_markup (GtkWidget *do_widget)
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{
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static GtkWidget *window = NULL;
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if (!window)
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{
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GtkWidget *sw;
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GtkTextBuffer *buffer;
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GtkTextIter iter;
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GBytes *bytes;
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const gchar *markup;
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GtkWidget *header;
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GtkWidget *show_source;
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window = gtk_window_new ();
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gtk_window_set_display (GTK_WINDOW (window),
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gtk_widget_get_display (do_widget));
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gtk_window_set_default_size (GTK_WINDOW (window), 450, 450);
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g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
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stack = gtk_stack_new ();
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gtk_widget_show (stack);
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gtk_window_set_child (GTK_WINDOW (window), stack);
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show_source = gtk_check_button_new_with_label ("Source");
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gtk_widget_set_valign (show_source, GTK_ALIGN_CENTER);
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g_signal_connect (show_source, "toggled", G_CALLBACK (source_toggled), stack);
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header = gtk_header_bar_new ();
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gtk_header_bar_pack_start (GTK_HEADER_BAR (header), show_source);
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gtk_window_set_titlebar (GTK_WINDOW (window), header);
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gtk_window_set_title (GTK_WINDOW (window), "Markup");
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view = gtk_text_view_new ();
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gtk_text_view_set_editable (GTK_TEXT_VIEW (view), FALSE);
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gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (view), GTK_WRAP_WORD_CHAR);
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gtk_text_view_set_left_margin (GTK_TEXT_VIEW (view), 10);
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gtk_text_view_set_right_margin (GTK_TEXT_VIEW (view), 10);
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sw = gtk_scrolled_window_new ();
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gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
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GTK_POLICY_AUTOMATIC,
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GTK_POLICY_AUTOMATIC);
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view);
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gtk_stack_add_named (GTK_STACK (stack), sw, "formatted");
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view2 = gtk_text_view_new ();
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gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (view2), GTK_WRAP_WORD);
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gtk_text_view_set_left_margin (GTK_TEXT_VIEW (view2), 10);
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gtk_text_view_set_right_margin (GTK_TEXT_VIEW (view2), 10);
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sw = gtk_scrolled_window_new ();
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gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
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GTK_POLICY_AUTOMATIC,
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GTK_POLICY_AUTOMATIC);
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view2);
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gtk_stack_add_named (GTK_STACK (stack), sw, "source");
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bytes = g_resources_lookup_data ("/markup/markup.txt", 0, NULL);
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markup = (const gchar *)g_bytes_get_data (bytes, NULL);
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buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
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gtk_text_buffer_get_start_iter (buffer, &iter);
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gtk_text_buffer_begin_irreversible_action (buffer);
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gtk_text_buffer_insert_markup (buffer, &iter, markup, -1);
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gtk_text_buffer_end_irreversible_action (buffer);
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buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view2));
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gtk_text_buffer_get_start_iter (buffer, &iter);
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gtk_text_buffer_begin_irreversible_action (buffer);
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gtk_text_buffer_insert (buffer, &iter, markup, -1);
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gtk_text_buffer_end_irreversible_action (buffer);
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g_bytes_unref (bytes);
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gtk_widget_show (stack);
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}
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if (!gtk_widget_get_visible (window))
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gtk_widget_show (window);
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else
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gtk_window_destroy (GTK_WINDOW (window));
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return window;
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}
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