The style chain is broken or damaged. I would debug into it. If you can make a simple test case I'll take a look
________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Daniel Freiman Sent: Saturday, October 20, 2007 9:34 AM To: [email protected] Subject: Re: [flexcoders] DataGrid not initializing default styles addPopUp is called the line before centerPopUp. Also, the second error is thrown after user interaction with the PopUp (not user interaction with the DataGrid though) so it's definitely been created already before the second error. - Dan Freiman On 10/19/07, Alex Harui <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote: Could you be centering a popup that hasn't been addPopUp'd? ________________________________ From: [EMAIL PROTECTED] ups.com [mailto:[EMAIL PROTECTED] ups.com <http://ups.com> ] On Behalf Of Daniel Freiman Sent: Friday, October 19, 2007 4:52 PM To: [email protected] Subject: Re: [flexcoders] DataGrid not initializing default styles Nope, it's just a plain DataGrid. All I touched was percentWidth/Height, minColumnWidth, draggable/resizableColumns and dataProvider. It's in the same popup as my earlier layout bug (Nested containers inside a PopUp.) Although I haven't been able to recreate in a contained example yet. - Dan Freiman On 10/19/07, Alex Harui <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote: Did you subclass DG? Alter its styles? ________________________________ From: [EMAIL PROTECTED] ups.com [mailto:[EMAIL PROTECTED] ups.com <http://ups.com> ] On Behalf Of Daniel Freiman Sent: Friday, October 19, 2007 2:37 PM To: flexcoders Subject: [flexcoders] DataGrid not initializing default styles I'm getting a situation where a Datagrid is not initializing it's default styles and is causing runtime errors when datagrid functions try to retrieve and operate on styles that are null. I'm getting two errors which I'm hoping will look familiar to someone: The first one occurs when the PopUpManager is validating a new popup container of which the datagrid is a descendant: TypeError: Error #1009: Cannot access a property or method of a null object reference. at mx.controls::DataGrid/mx.controls:DataGrid::drawHeaderBackground()[C:\de v\flex_201_gmc\sdk\frameworks\mx\controls\DataGrid.as:2573] at mx.controls::DataGrid/mx.controls:DataGrid::updateDisplayList()[C:\dev\f lex_201_gmc\sdk\frameworks\mx\controls\DataGrid.as:1257] at mx.core::UIComponent/validateDisplayList()[C:\dev\flex_201_gmc\sdk\frame works\mx\core\UIComponent.as:5760] at mx.managers::LayoutManager/validateClient()[C:\dev\flex_201_gmc\sdk\fram eworks\mx\managers\LayoutManager.as:858] at mx.core::UIComponent/validateNow()[C:\dev\flex_201_gmc\sdk\frameworks\mx \core\UIComponent.as:5218] at mx.managers::PopUpManagerImpl/centerPopUp()[C:\dev\flex_201_gmc\sdk\fram eworks\mx\managers\PopUpManagerImpl.as:336] at mx.managers::PopUpManager$/centerPopUp()[C:\dev\flex_201_gmc\sdk\framewo rks\mx\managers\PopUpManager.as:163] at com.colorquick.improv.managers::PaneManager$/openPane()[C:\Documents and Settings\Daniel\My Documents\Flex Builder 2\Improv2\com\colorquick\improv\managers\PaneManager.as:98] at com.colorquick.improv.toolbars.controls::DAMBrowseLists/com.colorquick.i mprov.toolbars.controls:DAMBrowseLists::clickHandler()[C:\Documents and Settings\Daniel\My Documents\Flex Builder 2\Improv2\com\colorquick\improv\toolbars\controls\DAMBrowseLists.as:24] If I workaround this error, the second one gets thrown after the dataprovider and columns properties are updated: TypeError: Error #1007: Instantiation attempted on a non-constructor. at mx.controls::DataGrid/mx.controls:DataGrid::drawSeparators ()[C:\dev\flex_201_gmc\sdk\frameworks\mx\controls\DataGrid.as:2896] at mx.controls::DataGrid/mx.controls:DataGrid::updateDisplayList()[C:\dev\f lex_201_gmc\sdk\frameworks\mx\controls\DataGrid.as:1269] at mx.core::ScrollControlBase/mx.core:ScrollControlBase::setScrollBarProper ties ()[C:\dev\flex_201_gmc\sdk\frameworks\mx\core\ScrollControlBase.as:1084] at mx.controls::DataGrid/mx.controls:DataGrid::configureScrollBars()[C:\dev \flex_201_gmc\sdk\frameworks\mx\controls\DataGrid.as:1791] at mx.controls.listClasses::ListBase/mx.controls.listClasses:ListBase::upda teDisplayList()[C:\dev\flex_201_gmc\sdk\frameworks\mx\controls\listClass es\ListBase.as:2972] at mx.controls::DataGrid/mx.controls:DataGrid::updateDisplayList ()[C:\dev\flex_201_gmc\sdk\frameworks\mx\controls\DataGrid.as:1208] at mx.core::UIComponent/validateDisplayList()[C:\dev\flex_201_gmc\sdk\frame works\mx\core\UIComponent.as:5760] at mx.managers::LayoutManager/mx.managers:LayoutManager::validateDisplayLis t ()[C:\dev\flex_201_gmc\sdk\frameworks\mx\managers\LayoutManager.as:600] at mx.managers::LayoutManager/mx.managers:LayoutManager::doPhasedInstantiat ion()[C:\dev\flex_201_gmc\sdk\frameworks\mx\managers\LayoutManager.as:67 3] at Function/http://adobe.com/AS3/2006/builtin::apply() at mx.core::UIComponent/mx.core:UIComponent::callLaterDispatcher2()[C:\dev\ flex_201_gmc\sdk\frameworks\mx\core\UICompon ent.as:7909 <http://ent.as:7909> ] at mx.core::UIComponent/mx.core:UIComponent::callLaterDispatcher ()[C:\dev\flex_201_gmc\sdk\frameworks\mx\core\UIComponent.as:7852] - Dan Freiman
