Draggable: Manage ui-draggable-handle correctly in nested instances

Author: tjvantoll

tests/unit/draggable/draggable_core.js

@@ -291,4 +291,17 @@ test( "ui-draggable-handle assigned to appropriate element", function() {
 	ok( !element.find( "p" ).hasClass( "ui-draggable-handle" ), "removed in destroy()" );
 });
 
+test( "ui-draggable-handle managed correctly in nested draggables", function() {
+	expect( 4 );
+	var parent = $( "<div><div></div></div>" ).draggable().appendTo( "#qunit-fixture" ),
+		child = parent.find( "div" ).draggable();
+
+	ok( parent.hasClass( "ui-draggable-handle" ), "parent has class name on init" );
+	ok( child.hasClass( "ui-draggable-handle" ), "child has class name on init" );
+
+	parent.draggable( "destroy" );
+	ok( !parent.hasClass( "ui-draggable-handle" ), "parent loses class name on destroy" );
+	ok( child.hasClass( "ui-draggable-handle" ), "child retains class name on destroy" );
+});
+
 })( jQuery );

ui/draggable.js

@@ -78,6 +78,7 @@ $.widget("ui.draggable", $.ui.mouse, {
 	_setOption: function( key, value ) {
 		this._super( key, value );
 		if ( key === "handle" ) {
+			this._removeHandleClassName();
 			this._setHandleClassName();
 		}
 	},
@@ -314,16 +315,13 @@ $.widget("ui.draggable", $.ui.mouse, {
 	},
 
 	_setHandleClassName: function() {
-		var handle =  this.options.handle ?
+		this.handleElement = this.options.handle ?
 			this.element.find( this.options.handle ) : this.element;
-		this._removeHandleClassName();
-		handle.addClass( "ui-draggable-handle" );
+		this.handleElement.addClass( "ui-draggable-handle" );
 	},
 
 	_removeHandleClassName: function() {
-		this.element.find( ".ui-draggable-handle" )
-			.addBack()
-			.removeClass( "ui-draggable-handle" );
+		this.handleElement.removeClass( "ui-draggable-handle" );
 	},
 
 	_createHelper: function(event) {