I don't use Flex 2.0.1 (I use Flex 3). I ran your app in Flex 3 and it works fine - ie. no exception is thrown.
Could this be a bug in Flex 2.0.1? --- In flexcoders@yahoogroups.com, "Sergey Kovalyov" <[EMAIL PROTECTED]> wrote: > > Hi All! > > When I add a new item to the tree node and then open this item by user input > null pointer exceptions is thrown and after that Tree behavior becomes > strange. > > Steps to reproduce: > > 1. Run application. > 2. Select My Branch node. > 3. Click Add button. As a result My Leaf subnode is created as a child of My > Branch. > 4. Click My Leaf disclosure icon to expland this item. > 5. Exception mentioned above is thrown. > > I compile this example in Flex 2.01 and run in Flash Player 9.0.47.0. > > We have found workaround. The bug can be "fixed" by setting Tree > openDuration style to 0. But I dislike workarounds. Are there any real > solutions to fix this bug? > > Sergey. > > > <?xml version="1.0" encoding="utf-8"?> > > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; > > layout="vertical"> > > <mx:Script> > > <![CDATA[ > > *import* mx.collections.XMLListCollection; > > *private* *static* *const* itemsXML : XML = > > <root> > > <item label=*"My Branch"* isBranch=*"true"* /> > > </root>; > > *private* *static* *const* itemsXMLListCollection : XMLListCollection = > > *new* XMLListCollection(itemsXML.children()); > > *private* *function* onAddButtonClick() : *void* { > > *var* parentXML : XML = XML(tree.selectedItem); > > *var* newItemXML : XML = <item label=*"My Leaf"* isBranch=*"true"* />; > > tree.dataDescriptor.addChildAt(parentXML, newItemXML, parentXML.length()); > > } > > ]]> > > </mx:Script> > > <mx:Tree id="tree" > > labelField="@label" > > showRoot="false" > > dataProvider="{itemsXMLListCollection}" /> > > <mx:Button label="Add" click="onAddButtonClick()" /> > > </mx:Application> >
