bind: function() {
this.onMouseDown = this.onMouseDown.bind( this );
this.onMouseMove = this.onMouseMove.bind( this );
this.onMouseUp = this.onMouseUp.bind( this );
this.resizeStarted = new signals.Signal();
this.resizeEnded = new signals.Signal();
for( var direction in this.anchors ) {
this.anchors[ direction ].on( 'vmousedown', this.onMouseDown );
}
}