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ColdFusion MX / FLASH MX - Tree Menuthe tree menu has a method called setDataProvider, which takes a data provider class (as do many of the other components). thus you don't have to manually map the recordset data to the tree menu, you just do something like: tree.setDataProvider(recordset); if you have a deeper data structure, then you will have to loop through the data and map it too the tree. mike chambers mesh@macromedia.com > > I've been doing this very thing right at the moment, and > > once you get your head into actionscripting its actually > > quite easy. > > Even once you learn ActionScripting, which can be a beast of > it's own, you > still have to learn Flash Remoting and CFCs. After you have > the basics down > with that, you'll have to understand recursive functions, > which again, can > be a beast. > > I have not had the chance to really test the following assumptions so > anyone, please let me know if I'm wrong. > > If you don't use recursive functions, you load the data in > one recordset at > a time. The first recordset is easy because you assign it to the > DataProvider of the RootNode (actually, I would recommend > DataGlue, but > setDataProvider works well too). Once you want to pull in > the next set of > data for a tree node, you have no reference back to the > original tree node > (unless you create a lookup for your tree). For example, you > make your call > to the server and when the recordset comes back, you have to > reference to > the parent tree node. You can find it's ID from the > recordset perhaps, but > there's no "findTreeNodeByID()" function. > > The only other way I could see implementing something like > this without > using a recursive function would be to have the server return > a recordset of > all the nodes, ordered by ParentID and doing this: > > (pseudo-code because I can't remember Recordset syntax off-hand): > > // input is a recordset from the server called "result" > > var rsLkp = new Object(); > var rsTree = new Object(); > > rsTree.ID = 0; > rsTree.ParentID = null; // not really necessary, but used > for clarity > rsTree.Name = "root node"; > rsTree.arrChildren = new Array(); > > rsLkp[0] = rsTree; > > // loop through recordset and stick nodes into the tree > for(var i=0; i<result.recordcount; i++) { > // find parentNode from Lookup > var parentNode = rsLkp[result[i].ParentID]; > > // find max index of child array in the parent node > var childIndex = parentNode.arrChildren.length; > > // set tree node with information > parentNode.arrChildren[childIndex] = new Object(); > parentNode.arrChildren[childIndex].ID = result[i].ID; > parentNode.arrChildren[childIndex].ParentID = > result[i].ParentID; > parentNode.arrChildren[childIndex].Name = result[i].Name; > parentNode.arrChildren[childIndex].arrChildren = new Array(); > > // add node to the lookup > rsLkp[result[i].ID] = parentNode.arrChildren[childIndex]; > } > > > > Disclaimer: I haven't tried that code, but it looks like it > should work. > (Famous last words) You could probably change that code > around to assign it > to a Tree component as well. > > > > > > Ben Johnson > > |
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