Sidebar.Animation = function ( editor ) {

	var signals = editor.signals;

	var options = {};
	var possibleAnimations = {};

	var container = new UI.Panel();
	container.setDisplay( 'none' );

	container.add( new UI.Text( 'Animation' ) );
	container.add( new UI.Break(), new UI.Break() );

	var AnimationsRow = new UI.Panel();
	var Animations = new UI.Select().setOptions( options ).setWidth( '130px' ).setColor( '#444' ).setFontSize( '12px' );
	AnimationsRow.add( new UI.Text( 'animations' ).setWidth( '90px' ) );
	AnimationsRow.add( Animations );
	container.add( AnimationsRow );
	container.add( new UI.Break() );

	var PlayRow = new UI.Panel();
	var playButton = new UI.Button().setLabel("Play").onClick(play);
	PlayRow.add( playButton );
	container.add( PlayRow );
	container.add( new UI.Break() );

	function play() {

		var value = Animations.getValue();

		if ( possibleAnimations[ value ] ) {

			var anims = possibleAnimations[value]

			for ( var i = 0; i < anims.length; i ++ ) {

				anims[ i ].play();

			}

			signals.playAnimations.dispatch( anims );

		};

	}

	signals.objectAdded.add( function ( object ) {

		if ( object instanceof THREE.Mesh ) {

			if ( object.geometry && object.geometry.animation ) {

				var name = object.geometry.animation.name;
				options[name] = name

				Animations.setOptions( options );

				THREE.AnimationHandler.add( object.geometry.animation );

				var animation = new THREE.Animation( object, name, THREE.AnimationHandler.CATMULLROM );

				if ( possibleAnimations[ name ] ){

					possibleAnimations[ name ].push( animation );

				} else {

					possibleAnimations[ name ] = [ animation ];

				}

			}

		}

	} );

	signals.objectSelected.add( function ( object ) {

		if ( object && object.geometry && object.geometry.animation ) {

			container.setDisplay( 'block' );

		} else {

			container.setDisplay( 'none' );

		}

	} );

	return container;

}