Ned Konz wrote:

> On Sunday 25 April 2004 12:33 am, Lothar Schenk wrote:
> > How can I restrict the path of an eToy that's in the process of being
> > dragged to an allowed region, or alternatively to avoid conflict with
> > other eToys as obstacles?
>
> First, you have to avoid having the morph dragged around by the hand,
> because it's much harder to control its position if the hand is dragging
> it.

I see. :)

> Turn on "resist being picked up" from the menu.
>
> Now if you make a script that is triggered on mouse down you could check
> the world's mouseX and mouseY.
>
> You can also put a morph in a container and constrain its bounds that way
> (you can use obtrudes to test), or use overlaps to test whether it's above
> another.
>
> The attached image is one way to do something like this:
>
> the blue Rectangle is locked in place. It could be transparent to make it
> invisible if you want.
>
> the roundRectangle has two scripts (shown). It's got "resist being picked
> up" turned on.
>
> The result is that you can mouse down on the roundRectangle if its center
> is inside the Rectangle, and you can drag the roundRectangle as long as the
> mouse is within the bounds of the Rectangle.
>
> Avoiding other morphs can be done with overlaps, colorSees, or touchesA
> (and probably other ways too).

Thank you. This example already goes a long way toward what I want to achieve.

Lothar