RE: FLASH: snap back

[Eric Smollin]

>i'm trying to set up a drag-n-drop where the user

>takes a specific object and drags it to a specific target object.


>if the user drags it to that target (and releases the mouse) then

>the object sticks. if not, it should snap back.


>can i do this in flash? if so...how?


Yes, that can definitely be done. In a nutshell, here's what you do:


1.) Create the target area as a MC, insert it on the main stage, and give it

an Instance Name (something like "target" will work, no quotes).


2.) Create a MC for your dragged object. This MC will include two keyframes,

the first one will have the following actions:

Stop

Set Variable: "ClipX" = GetProperty ("", _x )

Set Variable: "ClipY" = GetProperty ("", _y)


The second keyframe will contain a stop action.


3.) Create a button (this button is the object that you want to be dragged)

and put this button in the MC mentioned above. Give it the following

actions:

On (Press)

      Start Drag (GetProperty(_x, _y))

End On

On (Release)

      Stop Drag

      If (_droptarget eq "/Target")

            Go to Next Frame

      Else

            Set Property ("", Y Position) = ClipY

            Set Property ("", X Position) = ClipX

      End If

End On


Remember that "target" is the instance name you gave to the drop area on the

main timeline, and the "/" tells Flash to look up one level to the main

timeline.


What you are saying is this; If the object is dropped on the target, go to

then next frame of the MC (which by the way contains an instance of your

button with the behavior set to graphic, and a Stop action). Else, shoot

back to the original position (_x and _y). 


I hope that helps. If all it did was confuse you I can send you an example

FLA, just contact me off-list.


Good Luck

-Eric-





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