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# tree

Description

Renders a tree widget with AJAX support.

The "id "attribute is normally specified(recommended), such that it could be looked up using javascript if necessary. The "id" attribute is required if the "selectedNotifyTopic" or the "href" attributes are going to be used.

Parameters

#### Dynamic Attributes Allowed: false
#### Name | #### Required | #### Default | #### Evaluated | #### Type | #### Description
--- | --- | --- | --- | --- | ---
accesskey | false |  | false | String | Set the html accesskey attribute on rendered html element
blankIconSrc | false |  | false | String | Blank icon image source.
childCollectionProperty | false |  | false | String | The childCollectionProperty property.
collapsedNotifyTopics | false |  | false | String | Comma separated lis of topics to be published when a node is collapsed. An object with a 'node' property will be passed as parameter to the topics.
cssClass | false |  | false | String | The css class to use for element
cssErrorClass | false |  | false | String | The css error class to use for element
cssErrorStyle | false |  | false | String | The css error style definitions for element to use
cssStyle | false |  | false | String | The css style to use for element
disabled | false |  | false | String | Set the html disabled attribute on rendered html element
errorNotifyTopics | false |  | false | String | Comma delimmited list of topics that will published after the request(if the request fails).Only valid if 'href' is set
errorPosition | false |  | false | String | Define error position of form element (top|bottom)
expandIconSrcMinus | false |  | false | String | Expand icon (-) image source.
expandIconSrcPlus | false |  | false | String | Expand Icon (+) image source.
expandedNotifyTopics | false |  | false | String | Comma separated lis of topics to be published when a node is expanded. An object with a 'node' property will be passed as parameter to the topics.
gridIconSrcC | false |  | false | String | Image source for under child item child icons.
gridIconSrcL | false |  | false | String | Image source for last child grid.
gridIconSrcP | false |  | false | String | Image source for under parent item child icons.
gridIconSrcV | false |  | false | String | Image source for vertical line.
gridIconSrcX | false |  | false | String | Image source for grid for sole root item.
gridIconSrcY | false |  | false | String | Image source for grid for last root item.
href | false |  | false | String | Url used to load the list of children nodes for an specific node, whose id will be passed as a parameter named 'nodeId' (empty for root)
iconHeight | false | 18px | false | String | Icon height
iconWidth | false | 19px | false | String | Icon width
id | false |  | false | String | The id to use for the element
javascriptTooltip | false | false | false | Boolean | Use JavaScript to generate tooltips
key | false |  | false | String | Set the key (name, value, label) for this particular component
label | false |  | false | String | Label expression used for rendering an element specific label
labelSeparator | false | : | false | String | String that will be appended to the label
labelposition | false |  | false | String | Define label position of form element (top/left)
name | false |  | false | String | The name to set for element
nodeIdProperty | false |  | false | String | The nodeIdProperty property.
nodeTitleProperty | false |  | false | String | The nodeTitleProperty property.
onblur | false |  | false | String | Set the html onblur attribute on rendered html element
onchange | false |  | false | String | Set the html onchange attribute on rendered html element
onclick | false |  | false | String | Set the html onclick attribute on rendered html element
ondblclick | false |  | false | String | Set the html ondblclick attribute on rendered html element
onfocus | false |  | false | String | Set the html onfocus attribute on rendered html element
onkeydown | false |  | false | String | Set the html onkeydown attribute on rendered html element
onkeypress | false |  | false | String | Set the html onkeypress attribute on rendered html element
onkeyup | false |  | false | String | Set the html onkeyup attribute on rendered html element
onmousedown | false |  | false | String | Set the html onmousedown attribute on rendered html element
onmousemove | false |  | false | String | Set the html onmousemove attribute on rendered html element
onmouseout | false |  | false | String | Set the html onmouseout attribute on rendered html element
onmouseover | false |  | false | String | Set the html onmouseover attribute on rendered html element
onmouseup | false |  | false | String | Set the html onmouseup attribute on rendered html element
onselect | false |  | false | String | Set the html onselect attribute on rendered html element
openTemplate | false |  | false | String | Set template to use for opening the rendered html.
requiredLabel | false | false | false | Boolean | If set to true, the rendered element will indicate that input is required
requiredPosition | false |  | false | String | Define required position of required form element (left|right)
rootNode | false |  | false | String | The rootNode property.
selectedNotifyTopics | false |  | false | String | Comma separated lis of topics to be published when a node is selected. An object with a 'node' property will be passed as parameter to the topics.
showGrid | false | true | false | Boolean | Show grid
showRootGrid | false |  | false | String | The showRootGrid property (default true).
style | false |  | false | String | The css style definitions for element to use - it's an alias of cssStyle attribute.
tabindex | false |  | false | String | Set the html tabindex attribute on rendered html element
template | false |  | false | String | The template (other than default) to use for rendering the element
templateCssPath | false | {contextPath}/struts/tree.css. | false | String | Template css path
templateDir | false |  | false | String | The template directory.
title | false |  | false | String | Set the html title attribute on rendered html element
toggle | false | fade | false | String | The toggle property (either 'explode' or 'fade')
toggleDuration | false | 150 | false | String | Toggle duration in milliseconds
tooltip | false |  | false | String | Set the tooltip of this particular component
tooltipConfig | false |  | false | String | Deprecated. Use individual tooltip configuration attributes instead.
tooltipCssClass | false | StrutsTTClassic | false | String | CSS class applied to JavaScrip tooltips
tooltipDelay | false | Classic | false | String | Delay in milliseconds, before showing JavaScript tooltips
tooltipIconPath | false |  | false | String | Icon path used for image that will have the tooltip
treeCollapsedTopics | false |  | false | String | Deprecated. Use 'collapsedNotifyTopics' instead.
treeExpandedTopics | false |  | false | String | Deprecated. Use 'expandedNotifyTopics' instead.
treeSelectedTopic | false |  | false | String | Deprecated. Use 'selectedNotifyTopics' instead.
value | false |  | false | String | Preset the value of input element.

Examples

Static tree:

     <s:tree id="..." label="...">
        <s:treenode id="..." label="..." />
        <s:treenode id="..." label="...">
            <s:treenode id="..." label="..." />
            <s:treenode id="..." label="..." />
        </s:treenode>
        <s:treenode id="..." label="..." />
     </s:tree>

Dynamic tree (rendered on the server):

     <s:tree
              id="..."
              rootNode="..."
              nodeIdProperty="..."
              nodeTitleProperty="..."
              childCollectionProperty="..." />

Dynamic tree loaded with AJAX (one request is made for each node):

     <s:url id="nodesUrl" namespace="/nodecorate" action="getNodes" />
     <div style="float:left; margin-right: 50px;">
         <sx:tree id="tree" href="%{#nodesUrl}" />
     </div>

     On this example the url specified on the "href" attibute will be called to load
     the elements on the root. The response is expected to be a JSON array of objects like:
     [
          {
               label: "Node 1",
               hasChildren: false,
               id: "Node1"
          },
          {
               label: "Node 2",
               hasChildren: true,
               id: "Node2"
          },
     ]

     "label" is the text that will be displayed for the node. "hasChildren" marks the node has
     having children or not (if true, a plus icon will be assigned to the node so it can be
     expanded). The "id" attribute will be used to load the children of the node, when the node
     is expanded. When a node is expanded a request will be made to the url in the "href" attribute
     and the node's "id" will be passed in the parameter "nodeId".

     The children collection for a node will be loaded only once, to reload the children of a
     node, use the "reload()" function of the treenode widget. To reload the children nodes of "Node1"
     from the example above use the following javascript:

     dojo.widget.byId("Node1").reload();