Hi All,
i've search a lot for a solution in keeping my Tree state after a data
refresh and now, finally at all i reached my scope.
This is my solution:
my data provider in an xml like this
<root>
<Agent label="one" id="">
<Agent label="one-1" id="1"/>
<Agent label="one-2" id="2"/>
</Agent >
<Item label="two" id="">
<Item label="two-1" id="3"/>
<Item label="two-2" id="4"/>
</Item >
</root>
i don't set the myTree.dataprovider equal to an HTTPService.lastResult,
but i set it by hand aftar some modification of the xml.
so, when i retrieve the new xml i chek the myTree.openItems object to
manage my NEW xml and add the attribute open="true" to the opened node.
I get the rigth node checking the node.LocalName() and some other
attributes. after this process i change my data provider and i set the
render variable to true
myTree.dataProvider = xml.
render = true;
in the myTree item i've set the "render" event, so after the tree is
designed, the event is dipatched and i can open my nodes parsing the new
xml.
this is my as code:
--MXML--
<mx:Tree id="menu" height="100%" width="100%" borderStyle="none"
columnWidth="200"
horizontalScrollPolicy="auto" verticalScrollPolicy="auto"
showRoot="false"
itemRenderer="myMenuTreeItemRenderer"
labelField="@label"
click="showPopupMenu(event)"
render="renderFunc()"/>
--Action Script--
private function srvResult():void{
xml = XML(srv.lastResult); //The HTTPService result
//set open=true for open nodes
for(var i:Object in menu.openItems){
for each(var node:XML in xml.descendants()){
if(node.localName() == menu.openItems[i].localName()){
if( ([EMAIL PROTECTED] != "" && [EMAIL PROTECTED] ==
[EMAIL PROTECTED]) || ([EMAIL PROTECTED] == "" && [EMAIL PROTECTED] ==
[EMAIL PROTECTED]) ){
[EMAIL PROTECTED]"true";
}
}
}
}
menu.dataProvider=xml;
render=true;
}
var render:Boolean = false;
public function renderFunc():void{
if(render){
//apro i nodi
for each(var node:XML in xml.descendants()){
if(menu.dataDescriptor.isBranch(node)){
if([EMAIL PROTECTED] == "true"){
menu.expandItem(node,true);
}
}
}
}
render=false;
}
bye Federico
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