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https://issues.apache.org/jira/browse/FLEX-34084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13901461#comment-13901461
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Mike Crank commented on FLEX-34084:
-----------------------------------
Justin,
You have the headerenderer in the reported bug. Here is the DataGrid I have no
try catch in my code. Is there an easy fix?
Thanks,
Mike
<mx:DataGrid id="myDG" dataProvider="{myAC}" width="100%" height="100%"
rowHeight="24" doubleClickEnabled="true"
itemDoubleClick="DGdoubleClickHandler(event)" editable="false"
sortableColumns="true" allowMultipleSelection="true" headerStyleName="DGHead">
<mx:columns>
<mx:DataGridColumn id="numberDGC" headerText="Number" dataField="PK" width="75"
textAlign="right" sortable="false"/>
<mx:DataGridColumn id="descDGC" headerText="Description"
dataField="Description" width="300" textAlign="left" sortable="false"/>
<mx:DataGridColumn id="urlDGC" headerText="URL" dataField="URL" width="300"
textAlign="left" sortable="false" itemRenderer="itemRenderers.urlrenderer"/>
<mx:DataGridColumn id="publishedDGC" headerText="Published" dataField="Publish"
width="150" textAlign="center" sortable="true"
headerRenderer="headerRenderers.publishedheader"
sortCompareFunction="sortPublishedFunc" labelFunction="labelPublished"/>
</mx:columns>
</mx:DataGrid>
> Error with PopupButton/Menu in headerrenderer in DataGrid
> ---------------------------------------------------------
>
> Key: FLEX-34084
> URL: https://issues.apache.org/jira/browse/FLEX-34084
> Project: Apache Flex
> Issue Type: Bug
> Components: mx: DataGrid, mx: Menu, mx: PopUpButton
> Affects Versions: Apache Flex 4.11.0
> Environment: Web Browser
> Reporter: Mike Crank
> Assignee: Justin Mclean
> Fix For: Apache Flex 4.11.0
>
>
> TypeError: Error #1009: Cannot access a property or method of a null object
> reference.
> at
> mx.controls::Menu/updateDisplayList()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/mx/src/mx/controls/Menu.as:1401]
> at
> mx.controls.listClasses::ListBase/validateDisplayList()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/mx/src/mx/controls/listClasses/ListBase.as:3968]
> at
> mx.managers::LayoutManager/validateClient()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/framework/src/mx/managers/LayoutManager.as:1041]
> at
> mx.core::UIComponent/validateNow()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/framework/src/mx/core/UIComponent.as:8340]
> at
> mx.controls::PopUpMenuButton/commitProperties()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/mx/src/mx/controls/PopUpMenuButton.as:682]
> at
> mx.core::UIComponent/validateProperties()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/framework/src/mx/core/UIComponent.as:8482]
> at
> mx.managers::LayoutManager/validateClient()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/framework/src/mx/managers/LayoutManager.as:965]
> at
> mx.controls::DataGrid/http://www.adobe.com/2006/flex/mx/internal::calculateHeaderHeight()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/mx/src/mx/controls/DataGrid.as:2225]
> at
> mx.controls.dataGridClasses::DataGridHeader/measure()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/mx/src/mx/controls/dataGridClasses/DataGridHeader.as:209]
> at
> mx.core::UIComponent/http://www.adobe.com/2006/flex/mx/internal::measureSizes()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/framework/src/mx/core/UIComponent.as:8769]
> Here is the code of the headerrenderer. Works fine in Flex 4.6 SDK
> <?xml version="1.0" encoding="utf-8"?>
> <mx:HBox xmlns:fx="http://ns.adobe.com/mxml/2009";
> xmlns:s="library://ns.adobe.com/flex/spark"
> xmlns:mx="library://ns.adobe.com/flex/mx"
> xmlns:flash.filters="flash.filters.*"
> horizontalAlign="left" verticalAlign="middle"
> width="100%" height="100%" paddingLeft="4"
> horizontalScrollPolicy="off">
>
> <fx:Declarations>
> <mx:ArrayCollection id="ynAC">
> <fx:Object label="All" enabled="true" type="check"
> toggled="true" data="2"/>
> <fx:Object label="No" enabled="true" type="check"
> toggled="true" data="0"/>
> <fx:Object label="Yes" enabled="true" type="check"
> toggled="true" data="1"/>
> </mx:ArrayCollection>
>
> <fx:Array id="filterAR">
> <flash.filters:DropShadowFilter id="dropShadowFilter"
> alpha="0.9" angle="45" blurX="5" blurY="5" distance="4" color="0xababab"/>
> </fx:Array>
> </fx:Declarations>
>
> <fx:Script>
> <![CDATA[
> import mx.controls.Menu;
> import mx.events.MenuEvent;
> [Embed(source='assets/images/filter.png')]
> private var filterIcon:Class;
>
> private function setMenuBTN():void {
> for (var i:int = 0; i < ynAC.length; i++) {
>
> filterBTN.dataDescriptor.setToggled(ynAC.getItemAt(i), i == 0);
> }
> }
>
> private function initSortMenu():void {
> Menu(filterBTN.popUp).filters = filterAR;
> }
>
> private function userItemSelected(event:MenuEvent):void
> {
> for (var i:int = 0; i < ynAC.length; i++) {
>
> event.menu.dataDescriptor.setToggled(ynAC.getItemAt(i), i == event.index);
> }
>
>
> parentDocument.setPublishedObject(ynAC.getItemAt(event.index).data);
> }
> ]]>
> </fx:Script>
>
> <mx:PopUpMenuButton id="filterBTN" dataProvider="{ynAC}"
> icon="{filterIcon}" creationComplete="setMenuBTN(); initSortMenu()"
> itemClick="userItemSelected(event)" openAlways="true" labelField="label"
> width="40" height="26"/>
> <s:Label text="Published"/>
>
> </mx:HBox>
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