Merge branch 'startend' of https://github.com/jasongrout/three.js into dev

examples/js/controls/TrackballControls.js

@@ -65,6 +65,8 @@ THREE.TrackballControls = function ( object, domElement ) {
 	// events
 
 	var changeEvent = { type: 'change' };
+	var startEvent = { type: 'start'};
+	var endEvent = { type: 'end'};
 
 
 	// methods
@@ -389,6 +391,8 @@ THREE.TrackballControls = function ( object, domElement ) {
 
 		document.addEventListener( 'mousemove', mousemove, false );
 		document.addEventListener( 'mouseup', mouseup, false );
+		_this.dispatchEvent( startEvent );
+
 
 	}
 
@@ -426,6 +430,7 @@ THREE.TrackballControls = function ( object, domElement ) {
 
 		document.removeEventListener( 'mousemove', mousemove );
 		document.removeEventListener( 'mouseup', mouseup );
+		_this.dispatchEvent( endEvent );
 
 	}
 
@@ -449,6 +454,8 @@ THREE.TrackballControls = function ( object, domElement ) {
 		}
 
 		_zoomStart.y += delta * 0.01;
+		_this.dispatchEvent( startEvent );
+		_this.dispatchEvent( endEvent );
 
 	}
 
@@ -479,6 +486,8 @@ THREE.TrackballControls = function ( object, domElement ) {
 				_state = STATE.NONE;
 
 		}
+		_this.dispatchEvent( startEvent );
+
 
 	}
 
@@ -533,6 +542,7 @@ THREE.TrackballControls = function ( object, domElement ) {
 		}
 
 		_state = STATE.NONE;
+		_this.dispatchEvent( endEvent );
 
 	}