package
{
import flash.display.Sprite;
import flash.text.TextField;
import flash.events.MouseEvent;
import flash.text.TextFormat;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
public class Main extends Sprite
{
private var multilineField:TextField;
private var redFormat:TextFormat;
private var blackFormat:TextFormat;
public function Main()
{
stage.align = StageAlign.TOP_LEFT;
stage.scaleMode = StageScaleMode.NO_SCALE;
redFormat = new TextFormat();
redFormat.color = 0xFF0000;
blackFormat = new TextFormat();
blackFormat.color = 0x000000;
multilineField = new TextField();
multilineField.multiline = true;
multilineField.wordWrap = true;
multilineField.height = 400;
multilineField.width = 400;
multilineField.mouseEnabled = true;
multilineField.addEventListener(MouseEvent.MOUSE_MOVE,
getMouseOverLine);
multilineField.addEventListener(MouseEvent.MOUSE_OUT,
getMouseOutLine);
multilineField.text = "Returns .";
addChild(multilineField);
}
private function getMouseOverLine(mouseEvent:MouseEvent):void
{
var characterInLine:int = multilineField.getCharIndexAtPoint(10, mouseEvent.stageY);
if(characterInLine != -1) {
var lineIndex:int = multilineField.getLineIndexOfChar(characterInLine);
var firstCharIndex:int = multilineField.getLineOffset(lineIndex);
var lastCharIndex:int = firstCharIndex + multilineField.getLineLength(lineIndex);
multilineField.setTextFormat(blackFormat);
multilineField.setTextFormat(redFormat,firstCharIndex, lastCharIndex);
}
}
private function getMouseOutLine(mouseEvent:MouseEvent):void
{
multilineField.setTextFormat(blackFormat);
}
}
}