FYI, for anyone who may be interested.
---------- Forwarded message ----------
From: Mihai Chira (JIRA) <j...@apache.org>
Date: 12 January 2017 at 13:36
Subject: [jira] [Commented] (FLEX-27509) AdvancedListBase
itemMaskFreeList is null
To: iss...@flex.apache.org
[
https://issues.apache.org/jira/browse/FLEX-27509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15820903#comment-15820903
]
Mihai Chira commented on FLEX-27509:
------------------------------------
As I mentioned in the fix commit message, "Ideally there should be a
flag that specifies whether {{AdvancedListBase.addClipMask()}} has
applied the masking mechanism." I could apply and use this flag, but I
don't feel I sufficiently understand this masking mechanism to be able
to test that there are no regressions. If anyone wants to do this,
feel free to reopen this ticket.
> AdvancedListBase itemMaskFreeList is null
> -----------------------------------------
>
> Key: FLEX-27509
> URL: https://issues.apache.org/jira/browse/FLEX-27509
> Project: Apache Flex
> Issue Type: Bug
> Components: Advanced Data Grid, mx: DataGrid
> Affects Versions: Adobe Flex SDK 3.5 (Release), Apache Flex 4.15.0
> Environment: Affected OS(s): Windows
> Affected OS(s): Windows XP
> Browser: Internet Explorer 8.x
> Language Found: English
> Reporter: Adobe JIRA
> Assignee: Mihai Chira
> Fix For: Apache Flex 4.17.0
>
> Attachments: Reproduce FLEX-27509.avi
>
>
> Steps to reproduce:
> 1.This bug is in a complex proprietary system, so I am unable to post the
> whole code or easily come up with a simpler system to reproduce. (Is remote
> debugging a possibility?) However, I do have a call stack of the crash.
> Actual Results:
> Main Thread (Suspended: TypeError: Error #1009: Cannot access a
> property or method of a null object reference.)
>
> mx.controls.listClasses::AdvancedListBase/http://www.adobe.com/2006/flex/mx/internal::removeClipMask
> mx.controls.listClasses::AdvancedListBase/updateList
> mx.controls.listClasses::AdvancedListBase/setSelectionDataLoop
> mx.controls.listClasses::AdvancedListBase/commitSelectedItems
> mx.controls.listClasses::AdvancedListBase/commitSelectedItem
> mx.controls.listClasses::AdvancedListBase/set selectedItem
> com.connect3.proofing.views::CommentList/selectComment
> com.connect3.proofing.views::CommentList/updateCompleteDG
>
> com.connect3.proofing.views::CommentList/__dgComment_updateComplete
> flash.events::EventDispatcher/dispatchEventFunction [no source]
> flash.events::EventDispatcher/dispatchEvent [no source]
> mx.core::UIComponent/dispatchEvent
> mx.managers::LayoutManager/doPhasedInstantiation
> Function/http://adobe.com/AS3/2006/builtin::apply [no source]
> mx.core::UIComponent/callLaterDispatcher2
> mx.core::UIComponent/callLaterDispatcher
> flash.utils::Timer/_timerDispatch [no source]
> flash.utils::Timer/tick [no source]
> The error is in AdvancedListBase.removeClipMask line 5174.
> itemMaskFreeList is null.
> This is the code for CommentList.selectComment, where
> dpHierarchy is
> [Bindable] private var dpHierarchy:HierarchicalData;
> <mx:AdvancedDataGrid
> updateComplete="updateCompleteDG(event)" defaultLeafIcon="{null}" x="0"
> y="22" width="100%" height="100%" id="dgComment"
> variableRowHeight="true"
> verticalGridLines="false" sortExpertMode="true" useRollOver="false"
> folderOpenIcon="{null}"
> folderClosedIcon="{null}"
> sortItemRenderer="com.connect3.proofing.renderers.SortItemRenderer"
> horizontalScrollPolicy="auto"> ...
> </mx:AdvancedDataGrid>
> dgComment.dataProvider = dpHierarchy;
> public function selectComment(userCommentID:int):void {
> var commentList:ArrayCollection =
> ArrayCollection(dpHierarchy.source);
>
> for(var i:int=0; i<commentList.length;
> i++){
> var comment:Object =
> commentList.getItemAt(i);
>
> if (comment.userCommentID ==
> userCommentID) {
> dgComment.selectedItem =
> comment;
> //go to "selectedIndex" rather
> than simply i, because
> //when children grids are
> expanded, the indexes don't match up
>
> dgComment.scrollToIndex(dgComment.selectedIndex);
> dgComment.expandItem(comment,
> true, true);
> break;
> }
> }
> }
>
> Expected Results:
>
> itemMaskFreeList should not be null.
>
> Workaround (if any):
> None
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