chickadee » libui » new-area-handler

Creates a handler suitable for creating an area widget. The arguments to this procedure are procedures with the following signatures:

(draw-handler AREA-HANDLER AREA DRAW-PARAMS)

Run when the area widget is redrawn. DRAW-PARAMS contains the current drawing parameters.

(mouse-event-handler AREA-HANDLER AREA MOUSE-EVENT)

Run on mouse events with MOUSE-EVENT as argument.

(mouse-crossed-handler AREA-HANDLER AREA LEFT?)

Run when the mouse enters or leaves the area widget. LEFT? is #t if the mouse left it, otherwise #f.

(drag-broken-handler AREA-HANDLER AREA)

Run when dragging has been cancelled by the system.

(key-event-handler AREA-HANDLER AREA KEY-EVENT)

Run on key events with KEY-EVENT as argument.