To put it more simply, how do I force an itemRenderer bound to an image to refresh itself?
--- In [email protected], "flexcoder2008" <djohnso...@...> wrote: > > I am having trouble getting a datagrid that is bound to an > XMLListCollection to update properly. The datagrid uses item > renderers for a couple of the columns which display a simple colored > image. > > > <mx:itemRenderer > > <mx:Component> > <mx:Canvas > > <mx:Image source="{data.MyImage}" /> > </mx:Canvas> > </mx:Component> > </mx:itemRenderer> > > > This datagrid's dataProvider is set to bind to an XMLListCollection > variable which contains XML with one of the nodes being <MyImage> > > > This datagrid is a part of a module that gets loaded into a > TabNavigator control. When the module initializes I loop through each > row in the datagrid and check the values of the XML, and depending on > certain values, I update the content of the <MyImage> node, which in > turn will change the image source property. > > When the module first loads, everything works fine and the grid > displays correctly. > > The problem happens when I load a different module into the > tabNavigator. In a seperate module I do an update to this same > XMLListCollection. (I am using the Cairngorm framework and all my > shared data is stored in the model. ) When I reload the first module, > and the initialization logic fires, as I am looping through to do the > calculations to update the <MyImage> node I can see that everything is > updating in the XMLListCollection correctly. > > However, when the dataGrid displays, the row that corresponds to the > updated XML in the XMLListCollection is displaying a blank row, even > though the underlying values are correct. > > I believe this is a problem with the ItemRenderer not updating itself. > How do I force it to invalidate? I have tried doing a > dataGrid.dataProvider.refresh() and calling invalidateDisplayList() > etc. but cannot figure this one out. > > One workaround I discovered is that when I reload the first module > after updating the underlying XMLListCollection, if I append a new > empty node to the XML like so: myXML.* += <empty /> Then the > updated row displays correctly! > > Has anybody else out there ran into this problem? >
