[
https://issues.apache.org/jira/browse/FLEX-26948?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Justin Mclean resolved FLEX-26948.
----------------------------------
Resolution: Fixed
Fix Version/s: Apache Flex 4.10.0
Checked into develop.
> Null reference in Slider class: updateDisplayList
> -------------------------------------------------
>
> Key: FLEX-26948
> URL: https://issues.apache.org/jira/browse/FLEX-26948
> Project: Apache Flex
> Issue Type: Bug
> Components: mx: Slider
> Affects Versions: Adobe Flex SDK 4.1 (Release)
> Environment: Affected OS(s): All OS Platforms
> Browser: Internet Explorer 7.x
> Language Found: English
> Reporter: Adobe JIRA
> Labels: easyfix
> Fix For: Apache Flex 4.10.0
>
>
> We ran into a null reference in the mx Slider class, though the steps to
> reproduce are unknown. It happened in the updateDisplayList function, in the
> following code snippet:
> var isHorizontal:Boolean = (_direction == SliderDirection.HORIZONTAL);
> var numLabels:int = labelObjects ? labelObjects.numChildren : 0;
> var numThumbs:int = thumbs ? thumbs.numChildren : 0;
> var trackMargin:Number = getStyle("trackMargin");
> var widestThumb:Number = 6;
> var firstThumb:SliderThumb = SliderThumb(thumbs.getChildAt(0));
> if (thumbs && firstThumb)
> widestThumb = firstThumb.getExplicitOrMeasuredWidth();
> Note that the statement assigning numThumbs checks for null, but the
> statement assigning firstThumb does not. We had a null thumbs, which caused
> the firstThumb assignment to fail.
> The fix should be a simple matter of checking for null thumbs when assigning
> firstThumb.
>
> Actual Results:
> An ActionScript error has occurred:
> TypeError: Error #1009: Cannot access a property or method of a null object
> reference.
>
> Expected Results:
> No runtime error
>
> Workaround (if any):
> unknown
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
