Giles, If you comment out "e.currentTarget.parent.setChildIndex (e.currentTarget,e.currentTarget.parent.numChildren);" in yoru startPanelDrag function you will not get that message.
I'm still looking into why it's only popping up on the first drag. Precia --- In [email protected], "Giles Roadnight" <[EMAIL PROTECTED]> wrote: > > Hi All > > > > This is my first post so I thought I'd quickly introduce myself. > > > > I've been using Flash for about 4 or 5 years and have been very frustrated > trying to get it to work as a development environment rather than a > designers tool. Because if this I am very excited about Flex and can't wait > to get started. > > > > So far I've been doing a few tutorials and trying some of my own code and > I've run into a problem which I hope someone can help me with. > > > > I have the following code: > > > > <?xml version="1.0" encoding="utf-8"?> > > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; layout="absolute" > xmlns:ns1="myComponents.*"> > > <mx:Script> > > <![CDATA[ > > public function > startPanelDrag(e:Event):void > > { > > e.currentTarget.startDrag(); > > > e.currentTarget.parent.setChildIndex (e.currentTarget,e.currentTarget.parent. > numChildren); > > } > > public function > stopPanelDrag(e:Event):void > > { > > e.currentTarget.stopDrag(); > > } > > ]]> > > </mx:Script> > > <mx:Panel x="20" y="20" width="479" height="431" > layout="absolute" title="Main Application Window"> > > <mx:Button x="10" y="10" label="Login"/> > > > > </mx:Panel> > > <mx:Panel title="test drag" x="507" y="178" width="275" > height="273" mouseDown="startPanelDrag(event)" > mouseUp="stopPanelDrag(event)" toolTip="test"> > > > > </mx:Panel> > > </mx:Application> > > > > Which is just a couple of panels, one if which is draggable. The dragging > works great but when I release the mouse I get the following error: > > > > TypeError: Error #1009: Cannot access a property or method of a null object > reference. > > at > mx.containers.utilityClasses::CanvasLayout/::measureContentArea() > > at mx.containers.utilityClasses::CanvasLayout/measure() > > at mx.core::Application/mx.core:Application::measure() > > at mx.core::UIComponent/::measureSizes() > > at mx.core::UIComponent/validateSize() > > at mx.core::Container/validateSize() > > at mx.managers::LayoutManager/::validateSize() > > at mx.managers::LayoutManager/::doPhasedInstantiation() > > at Function/http://adobe.com/AS3/2006/builtin::apply() > > at mx.core::UIComponent/::callLaterDispatcher2() > > at mx.core::UIComponent/::callLaterDispatcher() > > > > which makes no sense to me at all. This only happens the first time I drag > and release, if I do it again I don't get any error. > > > > Can someone help me out with this? > > > > Thanks > > > > Giles >
