ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Basics of user interaction
Managing focus
Flash Player 9 and later, Adobe AIR 1.0 and later
An interactive object can receive focus, either programmatically or through a user action. Additionally, if the
tabEnabled property is set to true, the user can pass focus from one object to another by pressing the Tab key. Note
that the tabEnabled value is false by default, except in the following cases:
For a SimpleButton object, the value is true.
For a input text field, the value is true.
For a Sprite or MovieClip object with buttonMode set to true, the value is true.
In each of these situations, you can add a listener for FocusEvent.FOCUS_IN or FocusEvent.FOCUS_OUT to provide
additional behavior when focus changes. This is particularly useful for text fields and forms, but can also be used on
sprites, movie clips, or any object that inherits from the InteractiveObject class. The following example shows how to
enable focus cycling with the Tab key and how to respond to the subsequent focus event. In this case, each square
changes color as it receives focus.
Note: Flash Professional uses keyboard shortcuts to manage focus; therefore, to properly simulate focus management,
SWF files should be tested in a browser or AIR rather than within Flash.
var rows:uint = 10;
var cols:uint = 10;
var rowSpacing:uint = 25;
var colSpacing:uint = 25;
var i:uint;
var j:uint;
for (i = 0; i < rows; i++)
{
for (j = 0; j < cols; j++)
{
createSquare(j * colSpacing, i * rowSpacing, (i * cols) + j);
}
}
function createSquare(startX:Number, startY:Number, tabNumber:uint):void
{
var square:Sprite = new Sprite();
square.graphics.beginFill(0x000000);
square.graphics.drawRect(0, 0, colSpacing, rowSpacing);
square.graphics.endFill();
square.x = startX;
Last updated 6/6/2012
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