package {
import flash.display.Sprite;
import flash.display.DisplayObject;
import flash.events.MouseEvent;
import flash.geom.Point;
import flash.filters.DropShadowFilter;
public class Main extends Sprite {
private var _red:Sprite;
private var _green:Sprite;
private var _blue:Sprite;
private var _white:Sprite;
private var startingLocation:Point;
public function Main( ) {
_red = new Sprite( );
_red.graphics.beginFill( 0xFF0000 );
_red.graphics.drawRect( 0, 10, 10, 10 );
_red.graphics.endFill( );
_green = new Sprite( )
_green.graphics.beginFill( 0x00FF00 );
_green.graphics.drawRect( 0, 30, 10, 10 );
_green.graphics.endFill( );
_blue = new Sprite( );
_blue.graphics.beginFill( 0x0000FF );
_blue.graphics.drawRect( 0, 50, 10, 10 );
_blue.graphics.endFill( );
_white = new Sprite( );
_white.graphics.beginFill( 0xFFFFFF );
_white.graphics.drawRect( 20, 10, 50, 50 );
_white.graphics.endFill( );
addChild( _red );
addChild( _green );
addChild( _blue );
addChild( _white );
_red.addEventListener( MouseEvent.MOUSE_DOWN, pickup );
_red.addEventListener( MouseEvent.MOUSE_UP, place );
_green.addEventListener( MouseEvent.MOUSE_DOWN, pickup );
_green.addEventListener( MouseEvent.MOUSE_UP, place );
_blue.addEventListener( MouseEvent.MOUSE_DOWN, pickup );
_blue.addEventListener( MouseEvent.MOUSE_UP, place );
}
public function pickup( event:MouseEvent ):void {
startingLocation = new Point( );
startingLocation.x = event.target.x;
startingLocation.y = event.target.y;
event.target.startDrag( );
event.target.filters = [ new DropShadowFilter( ) ];
setChildIndex( DisplayObject( event.target ), numChildren - 1 );
}
public function place( event:MouseEvent ):void {
event.target.stopDrag( );
event.target.filters = null;
if ( event.target.dropTarget == _white ) {
var color:uint;
switch ( event.target ) {
case _red: color = 0xFF0000; break;
case _green: color = 0x00FF00; break;
case _blue: color = 0x0000FF; break;
}
_white.graphics.clear( );
_white.graphics.beginFill( color );
_white.graphics.drawRect( 20, 10, 50, 50 );
_white.graphics.endFill( );
}
event.target.x = startingLocation.x;
event.target.y = startingLocation.y;
}
}
}