Calculating Rotation - Page 2

Building The Slider

Ok. Download the example at the bottom of this page and load KnifeLibrary.fla as a library (File > Open as Library)

Drag a copy of the ScrollBar movie object out onto the stage. Now create a new layer and put a copy of Knife so its center point is in the same place as the center point for the scroll bar. If you're finding it hard to position, turn on the grid by choosing View > Grid or pressing Ctrl-Alt-Shift-G.

Hide the first layer containing the scrollbar and double click on the knife object. The knife is currently a graphic object. To change its properties, we have to give it an instance name of KnifeMovie and change this instance of Knife's behaviour to a movie clip.

OK, now our ScrollBar object consist of a movie containing a graphic and a movie, which in turn contains a button. It's this button we want to add actionscript to. You can go in through the hard way by editing the ScrollBar instance, or you can edit the movie containing the button via the library. Choose Window > Library or press Ctrl-L to bring up the current .fla's library, find ScrollHandle and double click the icon next to it.

Double click the button inside of ScrollHandle and add this action script:

On (Press, Drag Over)
      Start Drag ("", L=0, T=0, R=164, B=0)
End On
On (Release, Release Outside, Drag Out)
      Stop Drag
      Set Property ("/KnifeMovie", Rotation) = (180/164) * GetProperty ( "", _x )
End On