Learning ActionScript 2.0 in Adobe Flash 
Learning ActionScript 2.0 in Adobe Flash |
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| Working with Movie Clips > Managing movie clip depths > Determining the next highest available depth | |||
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To determine the next highest available depth within a movie clip, use MovieClip.getNextHighestDepth(). The integer value returned by this method indicates the next available depth that will render in front of all other objects in the movie clip.
The following code attaches a new movie clip, with a depth value of 10, on the root timeline named file_mc. It then determines the next highest available depth in that same movie clip and creates a new movie clip called edit_mc at that depth.
this.attachMovie("menuClip","file_mc", 10, {_x:0, _y:0});
trace(file_mc.getDepth()); // 10
var nextDepth:Number = this.getNextHighestDepth();
this.attachMovie("menuClip", "edit_mc", nextDepth, {_x:200, _y:0});
trace(edit_mc.getDepth()); // 11
In this case, the variable named nextDepth contains the value 11 because that's the next highest available depth for the edit_mc movie clip.
Do not use MovieClip.getNextHighestDepth() with components; instead, use the depth manager. For more information, see "DepthManager class" in Action Script 2.0 Components Language Reference. For more information on MovieClip.getNextHighestDepth(), see getNextHighestDepth (MovieClip.getNextHighestDepth method).
To obtain the current highest occupied depth, subtract 1 from the value that getNextHighestDepth() returns, as shown in the next section.
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