Interactive activation. By
default, it occurs on each insertion in the #GtkTextBuffer. This can be
blocked temporarily with gtk_source_completion_block_interactive().
NONE
NONE:number
None.
USER_REQUESTED
USER_REQUESTED:number
User requested activation.
By default, it occurs when the user presses
Controlspace.
Interactive activation. By default, it occurs on each insertion in the #GtkTextBuffer. This can be blocked temporarily with gtk_source_completion_block_interactive().