onSetFocus = function([oldfocus], [newfocus]) {}

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 the Selection.addListener() method 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.

Parameters

oldfocus: [optional] - The object losing focus.

newfocus: [optional] - The object receiving focus.

Example

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 += "&nbsp;\toldFocus:\t"+oldFocus;
    status_txt.htmlText += "&nbsp;\tnewFocus:\t"+newFocus;
    status_txt.htmlText += "&nbsp;\tgetFocus:\t"+Selection.getFocus();
    status_txt.htmlText += "</textformat>";
};
Selection.addListener(someListener);

See also

addListener (Selection.addListener method), setFocus (Selection.setFocus method)