Padding of a GtkToolButton

Is it possible to set the padding o开发者_开发知识库f a GtkToolButton (in my case, containing a GtkArrow)?

I found a solution:

• Put a GtkToolItem in the toolbar (gtk_toolbar_insert).
• Request a size: in my case, 13x36 (gtk_widget_set_size_request).
• Put a GtkButton in the GtkToolItem (gtk_container_add).

• Parse some GtkRC code:

  gtk_rc_parse_string(
  "style \"arrowbutton\" {\n" + // Arrows
  " xthickness = 0\n" +
  " ythickness = 0\n" +
  "}\n" +
  "widget \"*.arrowbutton\" style \"arrowbutton\"");

• Set the name "arrowbutton" for the GtkButton (gtk_widget_set_name).
• Put the GtkArrow (in my case) in the GtkButton (gtk_button_set_image).

Tried GtkContainer.set_border_width ?

Always follow inheritance hierarchy... for example ToolButton is a ToolItem, ToolItem is a Bin, Bin is a Container, and Container has a method set_border_width