Emit an event (ui_draw) immediately before drawing the screen

This allows better control over styling, as well as potential for
entirely new UI elements implemented entirely using the Lua API.

1 files changed, 4 insertions, 0 deletions

diff --git a/vis.c b/vis.c
index e287405..0c05558 100644
--- a/vis.c
+++ b/vis.c
@@ -105,6 +105,10 @@ bool vis_event_emit(Vis *vis, enum VisEvents id, ...) {
 		if (vis->event->term_csi)
 			vis->event->term_csi(vis, va_arg(ap, const long *));
 		break;
+	case VIS_EVENT_UI_DRAW:
+		if (vis->event->ui_draw)
+			vis->event->ui_draw(vis);
+		break;
 	}
 
 	va_end(ap);