fix bug#198，当点击展开收起事件时会选中所属节点

src/module/expand.js

@@ -142,6 +142,7 @@ define(function(require, exports, module) {
 
             initEvent: function(node) {
                 this.on('mousedown', function(e) {
+                    minder.select([node], true);
                     if (node.isExpanded()) {
                         node.collapse();
                     } else {
@@ -289,4 +290,4 @@ define(function(require, exports, module) {
             }]
         };
     });
-});
\ No newline at end of file
+});