easyui tree 一些常见操作

1 遍历tree nodes  
  2   
  3 function Travel(treeID){//参数为树的ID，注意不要添加#  
  4    var roots=$('#'+treeID).tree('getRoots'),children,i,j;  
  5    for(i=0;i<roots.length;i++){  
  6      alert(roots[i].text);  
  7      children=$('#'+treeID).tree('getChildren',roots[i].target);  
  8      for(j=0;j<children.length;j++)alert(children[j].text);  
  9    }  
 10 }       
 11   
 12    
 13   
 14        $(function(){  
 15                 $('#tt2').tree({  
 16                     checkbox: true,  
 17                     url: 'tree_data.json',  
 18                     onClick: function(node){  
 19                         $(this).tree('toggle', node.target);  
 20                         //alert('you dbclick '+node.text);  
 21                     },  
 22                     onContextMenu: function(e, node){  
 23                         e.preventDefault();  
 24                         $('#tt2').tree('select', node.target);  
 25                         $('#mm').menu('show', {  
 26                             left: e.pageX,  
 27                             top: e.pageY  
 28                         });  
 29                     }  
 30                 });  
 31             });  
 32   
 33   
 34             function reload(){  
 35                 var node = $('#tt2').tree('getSelected');  
 36                 if (node) {  
 37                     $('#tt2').tree('reload', node.target);  
 38                 }  
 39                 else {  
 40                     $('#tt2').tree('reload');  
 41                 }  
 42             }  
 43              
 44             function getChildren(){  
 45                 var node = $('#tt2').tree('getSelected');  
 46                 if (node) {  
 47                     var children = $('#tt2').tree('getChildren', node.target);  
 48                 }  
 49                 else {  
 50                     var children = $('#tt2').tree('getChildren');  
 51                 }  
 52                 var s = '';  
 53                 for (var i = 0; i < children.length; i++) {  
 54                     s += children[i].text + ',';  
 55                 }  
 56                 alert(s);  
 57             }  
 58              
 59             function getChecked(){  
 60                 var nodes = $('#tt2').tree('getChecked');  
 61                 var s = '';  
 62                 for (var i = 0; i < nodes.length; i++) {  
 63                     if (s != '')  
 64                         s += ',';  
 65                     s += nodes[i].text;  
 66                 }  
 67                 alert(s);  
 68             }  
 69              
 70             function getSelected(){  
 71                 var node = $('#tt2').tree('getSelected');  
 72                 alert(node.text);  
 73             }  
 74              
 75             function collapse(){  
 76                 var node = $('#tt2').tree('getSelected');  
 77                 $('#tt2').tree('collapse', node.target);  
 78             }  
 79              
 80             function expand(){  
 81                 var node = $('#tt2').tree('getSelected');  
 82                 $('#tt2').tree('expand', node.target);  
 83             }  
 84              
 85             function collapseAll(){  
 86                 var node = $('#tt2').tree('getSelected');  
 87                 if (node) {  
 88                     $('#tt2').tree('collapseAll', node.target);  
 89                 }  
 90                 else {  
 91                     $('#tt2').tree('collapseAll');  
 92                 }  
 93             }  
 94              
 95             function expandAll(){  
 96                 var node = $('#tt2').tree('getSelected');  
 97                 if (node) {  
 98                     $('#tt2').tree('expandAll', node.target);  
 99                 }  
100                 else {  
101                     $('#tt2').tree('expandAll');  
102                 }  
103             }  
104              
105             function append(){  
106                 var node = $('#tt2').tree('getSelected');  
107                 $('#tt2').tree('append', {  
108                     parent: (node ? node.target : null),  
109                     data: [{  
110                         text: 'new1',  
111                         checked: true  
112                     }, {  
113                         text: 'new2',  
114                         state: 'closed',  
115                         children: [{  
116                             text: 'subnew1'  
117                         }, {  
118                             text: 'subnew2'  
119                         }]  
120                     }]  
121                 });  
122             }  
123              
124             function remove(){  
125                 var node = $('#tt2').tree('getSelected');  
126                 $('#tt2').tree('remove', node.target);  
127             }  
128              
129             function update(){  
130                 var node = $('#tt2').tree('getSelected');  
131                 if (node) {  
132                     node.text = '<span style="font-weight:bold">new text<\/span>';  
133                     node.iconCls = 'icon-save';  
134                     $('#tt2').tree('update', node);  
135                 }  
136             }  
137              
138             function isLeaf(){  
139                 var node = $('#tt2').tree('getSelected');  
140                 var b = $('#tt2').tree('isLeaf', node.target);  
141                 alert(b)  
142             }  
143              
144             function GetNode(type){  
145                 var node = $('#tt2').tree('getChecked');  
146                 var chilenodes = '';  
147                 var parantsnodes = '';  
148                 var prevNode = '';  
149                 for (var i = 0; i < node.length; i++) {  
150                  
151                     if ($('#tt2').tree('isLeaf', node[i].target)) {  
152                         chilenodes += node[i].text + ',';  
153                          
154                         var pnode = $('#tt2').tree('getParent', node[i].target);  
155                         if (prevNode != pnode.text) {  
156                             parantsnodes += pnode.text + ',';  
157                             prevNode = pnode.text;  
158                         }  
159                     }  
160                 }  
161                 chilenodes = chilenodes.substring(0, chilenodes.length - 1);  
162                 parantsnodes = parantsnodes.substring(0, parantsnodes.length - 1);  
163                  
164                 if (type == 'child') {  
165                     return chilenodes;  
166                 }  
167                 else {  
168                     return parantsnodes  
169                 };  
170                 };  
171             function getNodes(){  
172                 alert(GetNode('fnode') + "," + GetNode('child'));  
173             }  
174              
175             function doNode(){  
176                 var c="";  
177                 var p="";  
178                 $(".tree-checkbox1").parent().children('.tree-title').each(function(){  
179                    c+=$(this).parent().attr('node-id')+",";  
180                 });  
181                 $(".tree-checkbox2").parent().children('.tree-title').each(function(){  
182                    p+=$(this).parent().attr('node-id')+",";  
183                 });  
184                 var str=(c+p);  
185                 str=str.substring(0,str.length-1);  
186                 alert(str);  
187             }