[gtk+] widget-factory: Demonstrate custom context menu items

[Matthias Clasen <matthiasc src gnome org>]

commit e1942a8bb9578b7c99ecea3231c23e1a3a9d94de
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jun 7 01:12:18 2015 -0400

    widget-factory: Demonstrate custom context menu items
    
    Add bold/italics/underline styling to the context menu of
    the 'Lorem ipsum...' text view in page 1. The point is not
    to show good UI for this kind of styling, but to demonstrate
    custom actions in the context menu / touch selection.

 demos/widget-factory/widget-factory.c  |   91 ++++++++++++++++++++++++++++++++
 demos/widget-factory/widget-factory.ui |   22 ++++++++
 2 files changed, 113 insertions(+), 0 deletions(-)
---
diff --git a/demos/widget-factory/widget-factory.c b/demos/widget-factory/widget-factory.c
index 979b7f7..10815ea 100644
--- a/demos/widget-factory/widget-factory.c
+++ b/demos/widget-factory/widget-factory.c
@@ -1125,6 +1125,93 @@ page_combo_separator_func (GtkTreeModel *model,
 }
 
 static void
+activate_item (GtkWidget *item, GtkTextView *tv)
+{
+  const gchar *tag;
+  GtkTextIter start, end;
+  gboolean active;
+
+  g_object_get (item, "active", &active, NULL);
+  tag = (const gchar *)g_object_get_data (G_OBJECT (item), "tag");
+  gtk_text_buffer_get_selection_bounds (gtk_text_view_get_buffer (tv), &start, &end);
+  if (active)
+    gtk_text_buffer_apply_tag_by_name (gtk_text_view_get_buffer (tv), tag, &start, &end);
+  else
+    gtk_text_buffer_remove_tag_by_name (gtk_text_view_get_buffer (tv), tag, &start, &end);
+}
+
+static void
+add_item (GtkTextView *tv,
+          GtkWidget   *popup,
+          const gchar *label,
+          const gchar *tag,
+          gboolean     set)
+{
+  GtkWidget *item;
+
+  if (GTK_IS_MENU (popup))
+    {
+      item = gtk_check_menu_item_new_with_label (label);
+      gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (item), set);
+      g_signal_connect (item, "toggled", G_CALLBACK (activate_item), tv);
+    }
+  else
+    {
+      item = gtk_check_button_new_with_label (label);
+      gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (item), set);
+      g_signal_connect (item, "clicked", G_CALLBACK (activate_item), tv);
+    }
+
+  g_object_set_data (G_OBJECT (item), "tag", (gpointer)tag);
+  gtk_widget_show (item);
+  gtk_container_add (GTK_CONTAINER (popup), item);
+}
+
+static void
+populate_popup (GtkTextView *tv,
+                GtkWidget   *popup)
+{
+  gboolean has_selection;
+  GtkWidget *item;
+  GtkTextIter start, end, iter;
+  GtkTextTagTable *tags;
+  GtkTextTag *bold, *italic, *underline;
+  gboolean all_bold, all_italic, all_underline;
+
+  has_selection = gtk_text_buffer_get_selection_bounds (gtk_text_view_get_buffer (tv), &start, &end);
+
+  if (!has_selection)
+    return;
+
+  tags = gtk_text_buffer_get_tag_table (gtk_text_view_get_buffer (tv));
+  bold = gtk_text_tag_table_lookup (tags, "bold");
+  italic = gtk_text_tag_table_lookup (tags, "italic");
+  underline = gtk_text_tag_table_lookup (tags, "underline");
+  all_bold = TRUE;
+  all_italic = TRUE;
+  all_underline = TRUE;
+  gtk_text_iter_assign (&iter, &start);
+  while (!gtk_text_iter_equal (&iter, &end))
+    {
+      all_bold &= gtk_text_iter_has_tag (&iter, bold);
+      all_italic &= gtk_text_iter_has_tag (&iter, italic);
+      all_underline &= gtk_text_iter_has_tag (&iter, underline);
+      gtk_text_iter_forward_char (&iter);
+    }
+
+  if (GTK_IS_MENU (popup))
+    {
+      item = gtk_separator_menu_item_new ();
+      gtk_widget_show (item);
+      gtk_container_add (GTK_CONTAINER (popup), item);
+    }
+
+  add_item (tv, popup, "Bold", "bold", all_bold);
+  add_item (tv, popup, "Italics", "italic", all_italic);
+  add_item (tv, popup, "Underline", "underline", all_underline);
+}
+
+static void
 activate (GApplication *app)
 {
   GtkBuilder *builder;
@@ -1327,6 +1414,10 @@ activate (GApplication *app)
   widget2 = (GtkWidget *)gtk_builder_get_object (builder, "totem_like_osd");
   g_object_set_data (G_OBJECT (widget), "osd", widget2);
 
+  widget = (GtkWidget *)gtk_builder_get_object (builder, "textview1");
+  g_signal_connect (widget, "populate-popup",
+                    G_CALLBACK (populate_popup), NULL);
+
   gtk_widget_show_all (GTK_WIDGET (window));
 
   g_object_unref (builder);
diff --git a/demos/widget-factory/widget-factory.ui b/demos/widget-factory/widget-factory.ui
index c7a7148..8c0e3fd 100644
--- a/demos/widget-factory/widget-factory.ui
+++ b/demos/widget-factory/widget-factory.ui
@@ -162,7 +162,28 @@
       </row>
     </data>
   </object>
+  <object class="GtkTextTagTable" id="tags">
+    <child type="tag">
+      <object class="GtkTextTag">
+        <property name="name">bold</property>
+        <property name="weight">800</property>
+      </object>
+    </child>
+    <child type="tag">
+      <object class="GtkTextTag">
+        <property name="name">italic</property>
+        <property name="style">italic</property>
+      </object>
+    </child>
+    <child type="tag">
+      <object class="GtkTextTag">
+        <property name="name">underline</property>
+        <property name="underline">single</property>
+      </object>
+    </child>
+  </object>
   <object class="GtkTextBuffer" id="textbuffer1">
+    <property name="tag-table">tags</property>
     <property name="text">Lorem ipsum dolor sit amet, consectetur adipiscing elit.
 Nullam fringilla, est ut feugiat ultrices, elit lacus ultricies nibh, id commodo tortor nisi id elit.
 Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.
@@ -1408,6 +1429,7 @@ Suspendisse feugiat quam quis dolor accumsan cursus.</property>
                                 <property name="wrap_mode">2</property>
                                 <property name="left_margin">10</property>
                                 <property name="right_margin">10</property>
+                                <property name="populate_all">True</property>
                               </object>
                             </child>
                           </object>