mouse within oval filled area

Glen Bojsza gbojsza at gmail.com
Sat Nov 12 15:34:32 EST 2011


This would be very difficult to implement if the graphic had a gradient.



On Sat, Nov 12, 2011 at 1:09 PM, John Dixon <dixonja at hotmail.co.uk> wrote:

>
> OK then...
>
> on mouseWithin
>   put the backgroundcolor of me into colorCheck
>   if the mouseColor = colorCheck then
>      put  "I am inside the coloured bit of control ID no" && the short id
> of me
>   end if
> end mouseWithin
>
>
>
> > From: admin at FlexibleLearning.com
> > To: use-livecode at lists.runrev.com
> > Subject: RE: mouse within oval filled area
> > Date: Sat, 12 Nov 2011 19:25:16 +0000
> >
> > Indeed, John, but not a unique object identifier if more than one grc
> uses
> > the same color. I think I am back to polar coordinates (unfortunately).
> >
> > The current engine behaviour is painfully inconsistent with other
> controls
> > whose transparency is immune from mouse events.
> >
> > Hugh Senior
> > FLCo
> >
> >
> > John Dixon wrote:
> >
> > > Use the mouseColor ?
> >
> >
> > Original message:
> >
> > > Has anyone worked out how to test if the mouseLoc is within the filled
> > area
> > > of an oval graphic (defined by startAngle and arcAngle)? I was thinking
> > > polar coordinates, but this assumes a circle and a fixed radius which
> is
> > not
> > > necessarily the case. A btter math brain than mine is needed!
> > >
> > > Hugh Senior
> > > FLCo
> >
> >
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