ActionScript 2.0 Language Reference 
ActionScript 2.0 Language Reference |
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| ActionScript classes > Selection > onSetFocus (Selection.onSetFocus event listener) | |||
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Notified when the input focus changes. To use this listener, you must create a listener object. You can then define a function for this listener and use Selection.addListener() to register the listener with the Selection object, as in the following code:
var someListener:Object = new Object();
someListener.onSetFocus = function () {
// statements
}
Selection.addListener(someListener);
Listeners enable different pieces of code to cooperate because multiple listeners can receive notification about a single event.
Availability: ActionScript 1.0; Flash Player 6
oldfocus:Object [optional] - The object losing focus.
newfocus:Object [optional] - The object receiving focus.
The following example demonstrates how to determine when input focus changes in a SWF file between several dynamically created text fields. Enter the following ActionScript into a FLA or AS file and then test the document:
this.createTextField("one_txt", 1, 0, 0, 100, 22);
this.createTextField("two_txt", 2, 0, 25, 100, 22);
this.createTextField("three_txt", 3, 0, 50, 100, 22);
this.createTextField("four_txt", 4, 0, 75, 100, 22);
for (var i in this) {
if (this[i] instanceof TextField) {
this[i].border = true;
this[i].type = "input";
}
}
this.createTextField("status_txt", this.getNextHighestDepth(), 200, 10, 300, 100);
status_txt.html = true;
status_txt.multiline = true;
var someListener:Object = new Object();
someListener.onSetFocus = function(oldFocus, newFocus) {
status_txt.htmlText = "<b>setFocus triggered</b>";
status_txt.htmlText += "<textformat tabStops='[20,80]'>";
status_txt.htmlText += " \toldFocus:\t"+oldFocus;
status_txt.htmlText += " \tnewFocus:\t"+newFocus;
status_txt.htmlText += " \tgetFocus:\t"+Selection.getFocus();
status_txt.htmlText += "</textformat>";
};
Selection.addListener(someListener);
The MovieClip.getNextHighestDepth() method used in this example requires Flash Player 7 or later. If your SWF file includes a version 2 component, use the version 2 components' DepthManager class instead of the MovieClip.getNextHighestDepth() method.
addListener (Selection.addListener method), setFocus (Selection.setFocus method)
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