Re: how to do a hit-test

[Damon Chaplin <damonachaplin gmail com>]

On Sun, 2013-09-29 at 11:46 -0400, dmg wrote:
> Hi everybody,
>
> I have another question,
>
> lets assume I have a closed polygon. Is there a way to do a hit-test (test if
> a point is inside the polygon). I know this is supported in cairo:
>
> cairo_bool_t        cairo_in_fill                       (cairo_t *cr,
>                                                          double x,
>                                                          double y);
>
> is there something equivalent in goocanvas?

Yes, you can set the "pointer-events" property to indicate which events
you want for an item. It defaults to only the painted parts of the item,
when visible, but you can change it to GOO_CANVAS_EVENTS_FILL so the
interior of the item always gets events.

(Have a look at the "Events" page in the demo.)

Damon