ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Mouse input
private function generateBoard(startX:Number, startY:Number, totalRows:Number,
totalCols:Number, buttonSize:Number):void
{
buttons = new Array();
var colCounter:uint;
var rowCounter:uint;
for (rowCounter = 0; rowCounter < totalRows; rowCounter++)
{
for (colCounter = 0; colCounter < totalCols; colCounter++)
{
var b:Button = new Button();
b.x = startX + (colCounter*buttonSize);
b.y = startY + (rowCounter*buttonSize);
b.addEventListener(MouseEvent.CLICK, letterClicked);
b.label = getRandomLetter().toUpperCase();
b.setSize(buttonSize,buttonSize);
b.name = "buttonRow"+rowCounter+"Col"+colCounter;
addChild(b);
}
}
}
buttons.push(b);
Although a listener is added for a MouseEvent.CLICK event on only one line, because it is in a for loop, it is assigned
to each Button instance. Also, each button is assigned a name derived from its row and column position, which
provides an easy way to reference the row and column of each button later in the code.
Building words from user input
Flash Player 9 and later, Adobe AIR 1.0 and later
Words can be spelled by selecting letters that are vertically or horizontally adjacent, but never using the same letter
twice. Each click generates a mouse event, at which point the word the user is spelling must be checked to ensure it
properly continues from letters that have previously been clicked. If it is not, the previous word is removed and a new
one is started. This check occurs in the isLegalContinuation() method.
private function isLegalContinuation(prevButton:Button, currButton:Button):Boolean
{
var currButtonRow:Number = Number(currButton.name.charAt(currButton.name. indexOf("Row") +
3));
var currButtonCol:Number = Number(currButton.name.charAt(currButton.name.indexOf("Col") +
3));
var prevButtonRow:Number = Number(prevButton.name.charAt(prevButton.name.indexOf("Row") +
3));
var prevButtonCol:Number = Number(prevButton.name.charAt(prevButton.name.indexOf("Col") +
3));
}
return ((prevButtonCol == currButtonCol && Math.abs(prevButtonRow - currButtonRow)