It IS, or at least was, the case that non-visual components must be at the root mxml scope. I will try to find it documented.
If the component is non-visual, then it does not matter, functionally speaking, where in the DOM it goes. Tracy ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Rick Winscot Sent: Friday, December 12, 2008 1:25 PM To: [email protected] Subject: Re: [flexcoders] Restrictions on non-visual component placement It's difficult to determine what your problem is without knowing a little more about what your DetailPopUp does/is. If you post some code it would be far easier to determine why one context works and another doesn't. Generally... I wouldn't recommend mingling non-visual and visual components in mxml. Your error basically says that your non-visual component doesn't have an appropriate interface for the context you are placing it in. e.g. It should be a IUIComponent. http://livedocs.adobe.com/flex/201/langref/mx/core/IUIComponent.html <http://livedocs.adobe.com/flex/201/langref/mx/core/IUIComponent.html> Rick Winscot On 12/12/08 12:49 PM, "Michael Prescott" <[email protected]> wrote: Short version: I have a non-visual component that I'm trying to declare in a repeater, but it seems that MXML doesn't allow this. Is this true? How do you get around this, create a visual component to wrap the non-visual component? Long version: I have an ActionScript non-visual component whose declaration looks like this: public class DetailPopup extends EventDispatcher implements IMXMLObject I've used this successfully inside an inline, MXML item renderer, like this: <mx:DataGridColumn> <mx:itemRenderer> <mx:Component> <mx:VBox> <!-- a bunch of other stuff, and then my: --> <my:DetailPopUp/> <mx:VBox> </mx:Component> </mx:itemRenderer> </mx:DataGridColumn> Now that I'm switching from a DataGrid to a Grid, the code ought to look like this: <mx:GridItem> <mx:VBox> <!-- a bunch of other stuff, and then my: --> (X) <my:DetailPopUp/> <mx:VBox> </mx:GridItem> ..except that I'm getting an error, "Component declarations are not allowed here. (Note: visual children must implement IUIComponent.)" After trying out a bunch of scenarios, it looks like non-visual components can only be declared in the outermost scope of a component or application. Is this true? This is rather awkward, as I need a DetailPopUp for each griditem. Any tips would be very helpful! Michael
