Whenever you want help diagnosing a thrown exception, use a debug build and post the entire stack trace with the linenumbers.
From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Adrian Williams Sent: Wednesday, November 19, 2008 1:04 PM To: [email protected] Subject: [flexcoders] Alex et al, Could this be a bug in the AdvancedDataGridBaseEx? WAS-> Strange ADG error on deleting entire nodes at once... Ok, I have spent the morning pouring through the debugging trying to figure out what this error is and am completely stymied. I have been able to determine it has nothing to do with my delete functions...the code never makes it to them anyway...I suspect it may be a bug in the core AdvancedDataGridBaseEx code. The actions that are being done are: 1.) A user drags a grouped node off the 6-column ADG to the trash can image on the app control bar... <mx:Image source="{trashImage}" right="80" buttonMode="true" toolTip="drag a subgroup here to delete them from the project" dragDrop="deleteSubgroupDrop(event)" dragEnter="deleteSubgroupEnter(event)" id="image2"/> 2.) my drag manager is listening and accepts the dragEnter: private function deleteSubgroupEnter(evt:DragEvent):void { var obj:IUIComponent = IUIComponent(evt.currentTarget); DragManager.acceptDragDrop(obj); } 2.) and then accepts the dragDrop. On the drop, I am throwing an alert box up to confirm that the user wants to do this: private function deleteSubgroupDrop(event:DragEvent):void { partsToDelete = new Array; partsToDelete = currentSubgroups.selectedItems; subgroupToRemove = currentSubgroups.selectedItem.GroupLabel; alert.confirm("Are you sure you want to delete this subgroup: '" + subgroupToRemove + "' from the project?? This cannot be reversed!!", deleteSubgroupAction); } 3.) When it hits the alert box, the code then jumps into the core to render the alert box. The code eventually ends up in the LayoutManager.as code on line 592, function validateDisplayList():void. 4.) The logic steps thru all of the objects that are on the stage and for each of them calls the obj.validateDisplayList(); function. All goes well until it gets to my ADG. Via the validate leg, it goes to the ADGBaseEx.as code to the function commitEditedItemPosition(coord:Object):void. During the course of this function, the columnIndex is manhandled all over the place. Eventually, it gets to line 4406 where it is checking: if(colIndex > lockedColumnCount) and passes this check, stepping to the next line of if (colIndex < horizontalScrollPosition + lockedColumnCount) which fails, then executing a loop against the colIndex. Once the loop is completed, the final line actualColIndex = absoluteToVisibleColumnIndex(displayToAbsoluteColumnIndex(colIndex)); is called, which is on line 7164 of the AdvancedDataGridBaseEx.as code. Within this function is a single method: return displayableColumns[columnIndex].colNum; As I stepped thru the code, I watched the values. columnIndex == 6 and on the execution of this line, the error is thrown. When I hover the mouse over the components of the line, I get tooltips on "displayableColumns (Array displayableColumns - mx.controls.AdvancedDataGridBaseEx) and over [columnIndex] (columnIndex = 6). However, when I hover over the .colNum...I get nothing. In this case, the error is: TypeError: Error #1010: A term is undefined and has no properties. I am really hoping that someone, especially Alex or the like, can provide some insight to what the heck is happening here because I really, really need to get past this error. Best, Adrian oneworld95 wrote: What does your delete method look like? Try adding some IF statements to check for null or undefined values before you run the delete. If it's null or undefined, do a return. --- In [email protected]<mailto:flexcoders%40yahoogroups.com>, Adrian Williams <[EMAIL PROTECTED]> wrote: > > All, > > I could really use some help in identifying where even to begin > looking to figure out what's causing this problem. > > I have a ADG that is displaying a GroupingCollection. > > I have an application control bar that has a "trash" image. A user > can drag a node from the ADG and drop it in the trash to delete the node > and all it's children. > > When you initially get into the application and drag the first node > of the tree to the trash, the delete fires correctly and without error. > > When you try to drag the (now) first node of the tree into the > trash, I get the following error: > > TypeError: Error #1010: A term is undefined and has no properties. > at > mx.controls::AdvancedDataGridBaseEx/displayToAbsoluteColumnIndex()[C:\Work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\AdvancedDataGridBaseEx.as:7166] > at > mx.controls::AdvancedDataGridBaseEx/commitEditedItemPosition()[C:\Work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\AdvancedDataGridBaseEx.as:4426] > at > mx.controls::AdvancedDataGridBaseEx/updateDisplayList()[C:\Work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\AdvancedDataGridBaseEx.as:1807] > at > mx.controls::AdvancedDataGrid/updateDisplayList()[C:\Work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\AdvancedDataGrid.as:5924] > at > mx.controls.listClasses::AdvancedListBase/validateDisplayList()[C:\Work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\listClasses\AdvancedListBase.as:3071] > at > mx.managers::LayoutManager/validateDisplayList()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\managers\LayoutManager.as:602] > at > mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\managers\LayoutManager.as:675] > at Function/http://adobe.com/AS3/2006/builtin::apply() > at > mx.core::UIComponent/callLaterDispatcher2()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\core\UIComponent.as:8460] > at > mx.core::UIComponent/callLaterDispatcher()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\core\UIComponent.as:8403] > > This only errors when manipulating the second time you try to delete > the first node. You can delete any of the other nodes, repeatedly, > without error. I suspect there is some kind of out of index problem > happening but the dump gives me no ideas on where to look. > > Anyone?! > > Thanks, > Adrian >
