| Value | Meaning |
|---|---|
| None0 | None. |
| Interactive1 | Interactive activation. By default, it occurs on each insertion in the #GtkTextBuffer. This can be blocked temporarily with gtksource.completion.Completion.blockInteractive. |
| UserRequested2 | User requested activation. By default, it occurs when the user presses <keycombo><keycap>Control</keycap><keycap>space</keycap></keycombo>. |