Sets the contents of the selection from a UTF-8 encoded string. The string is converted to the form determined by selection_data->target.
a GtkSelectionData
a UTF-8 string
the length of str, or -1 if str is nul-terminated.
TRUE if the selection was successfully set, otherwise FALSE.
See Implementation
Sets the contents of the selection from a UTF-8 encoded string. The string is converted to the form determined by selection_data->target.