Left-click on the trail MovieClip and write the following code in the Actions Pane:
onClipEvent(load)
{
if (this==_root.trail)
{
stop();
}
}
onClipEvent(enterFrame)
{
if (this==_root.trail)
{
_root.trail._x=_root._xmouse;
_root.trail._y=_root._ymouse+10;
}
}
Explanation
The code under the onClipEvent(enterFrame) handler makes the trail MovieClip follow the cursor.
The condition checks whether the MovieClip is the original one or a duplicate. If it is a duplicate, its X and Y positions are already set to that of the original MovieClip (since all the duplicated MovieClips inherit the latest X and Y values of the original MovieClip trail which is always moving along with the cursor) and so no code for adjusting its position is necessary.
The code under the onClipEvent(load) event ensures that the original MovieClip is stopped at frame 1 of its animation. If there was no such check, the original MovieClip would continue to play its animation in an infinite loop (removeMovieClip() has no effect on the original MovieClip which is at a negative depth).
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Custom Trailing Cursor in Flash MX
