On 4 Jul 2011, at 14:11, Ken Ray wrote:
> The only current way is through polling during
> mouseMove, which, although ugly, is usually fast enough even if you have
> hundreds of objects:
>
>
> on mouseMove
> if the mouse is down then
> repeat with x = 1 to the number of controls
> if the mouseLoc is within the rect of control x then
> -- do what you want to do with it
> else
> -- take some other action
> end if
> end repeat
> end if
> end mouseMove
Scott Raney used to lecture us on avoiding polling with the mouse and mouseLoc
in situations like this. It's more efficient to use the x, y parameters passed
in to mouseMove. Something like this:
local sDown
on mouseUp
put false into sDown
end mouseUp
on mouseRelease
put false into sDown
end mouseRelease
on mouseDown
put true into sDown
end mouseDown
on mouseMove x, y
if sDown then
repeat with k = 1 to the number of controls -- or whatver control list
you need to test
if (x,y) is within the rect of control k then
-- do your thing here
end if
end repeat
end if
end mouseMove
Cheers
Dave
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