In a GTK+ 2 resource file (usually ~/.emacs.d/gtkrc), the simplest kind of a resource setting simply assigns a value to a variable. For example, putting the following line in the resource file changes the font on all GTK+ widgets to courier-12:

gtk-font-name = "courier 12"

@noindent Note that in this case the font name must be supplied as a GTK font pattern (also called a Pango font name), not as a Fontconfig-style font name or XLFD. Fonts. To customize widgets you first define a style, and then apply the style to the widgets. Here is an example that sets the font for menus (# characters indicate comments):

# @r{Define the style @samp{my_style}.}
style "my_style"
@{
  font_name = "helvetica bold 14"
@}

# @r{Specify that widget type @samp{*emacs-menuitem*} uses @samp{my_style}.}
widget "*emacs-menuitem*" style "my_style"

@noindent The widget name in this example contains wildcards, so the style is applied to all widgets matching *emacs-menuitem*. The widgets are named by the way they are contained, from the outer widget to the inner widget. Here is another example that applies my_style specifically to the Emacs menu bar:

widget "Emacs.pane.menubar.*" style "my_style"

Here is a more elaborate example, showing how to change the parts of the scroll bar:

style "scroll"
@{
  fg[NORMAL] = "red"@ @ @ @ @ # @r{Arrow color.}
  bg[NORMAL] = "yellow"@ @ # @r{Thumb and background around arrow.}
  bg[ACTIVE] = "blue"@ @ @ @ # @r{Trough color.}
  bg[PRELIGHT] = "white"@ # @r{Thumb color when the mouse is over it.}
@}

widget "*verticalScrollBar*" style "scroll"