docs: Update the visual index images

The snapshots need to be refreshed to represent a recent version of the
current theme.

docs/reference/gtk/Makefile.am

@@ -349,6 +349,7 @@ HTML_IMAGES = \
 	$(srcdir)/images/box-packing.png				\
 	$(srcdir)/images/box-expand.png					\
 	$(srcdir)/images/button.png					\
+	$(srcdir)/images/calendar.png					\
 	$(srcdir)/images/check-button.png				\
 	$(srcdir)/images/color-button.png				\
 	$(srcdir)/images/colorchooser.png				\

docs/reference/gtk/meson.build

@@ -245,6 +245,7 @@ images = [
   'images/box-packing.png',
   'images/box-expand.png',
   'images/button.png',
+  'images/calendar.png',
   'images/check-button.png',
   'images/color-button.png',
   'images/colorchooser.png',

docs/reference/gtk/visual_index.xml

@@ -45,6 +45,9 @@
     <link linkend="GtkGLArea">
       <inlinegraphic fileref="glarea.png" format="PNG"></inlinegraphic>
     </link>
+    <link linkend="GtkCalendar">
+      <inlinegraphic fileref="calendar.png" format="PNG"></inlinegraphic>
+    </link>
   </para>
 </section>
 

docs/tools/widgets.c

@@ -756,6 +756,16 @@ create_frame (void)
   return new_widget_info ("frame", widget, MEDIUM);
 }
 
+static WidgetInfo *
+create_caledar (void)
+{
+  GtkWidget *widget;
+
+  widget = gtk_calendar_new ();
+
+  return new_widget_info ("calendar", widget, MEDIUM);
+}
+
 static WidgetInfo *
 create_window (void)
 {
@@ -1552,6 +1562,7 @@ get_all_widgets (void)
   retval = g_list_prepend (retval, create_about_dialog ());
   retval = g_list_prepend (retval, create_accel_label ());
   retval = g_list_prepend (retval, create_button ());
+  retval = g_list_prepend (retval, create_caledar ());
   retval = g_list_prepend (retval, create_check_button ());
   retval = g_list_prepend (retval, create_color_button ());
   retval = g_list_prepend (retval, create_combo_box ());