Gtksv_utils.source_style_scheme_box
This box can be used to make the user set the source style scheme. Use the read_style_scheme_selection
and store_style_scheme_selection
functions to restore or save the selection. The function in parameter is used to apply the scheme when a change occurs. For example, you can given the apply_source_style_scheme_to_registered_buffers
function to update your registered source buffers when the user chooses a scheme.