how to create draggable objects

[Klaus Major]

Hi Nicolas

> Any pointers as to where to begin looking in the Transcript Dictionary 
> to
> learn about how to allow objects to be dragged and dropped would be 
> very
> welcome. (The purpose: students click on a button to hear an English 
> word
> and then drag the corresponding image to that same button.)

I have done this before and just used a combination of:
grab, mouseup, within() or intersect()

Give the image a "mousedown" AND a "mouseup"handler:


local oldloc
## to let the image "snap back" to its old positon after releasing the 
mouse...
## VERY PRO :-D

on mouseUp
   if intersect(me, btn 1) then
      ##do whatever to do in this case
   end if

   set the loc of me to oldloc
   ## snap back :-)
end mouseUp

on mousedown
   put the loc of me into oldloc
   grab me
end mousedown


Tested and works fine...

Hope that helps.

> Cheers,
>
> Nicolas Cueto

Regards

Klaus Major
klaus at major-k.de
http://www.major-k.de