Colin Childs created FLEX-34391:
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Summary: ScrollableStageText with large y value crashes app
Key: FLEX-34391
URL: https://issues.apache.org/jira/browse/FLEX-34391
Project: Apache Flex
Issue Type: Bug
Components: Mobile: ScrollableStageText
Affects Versions: Apache Flex 4.12.1
Environment: All
Reporter: Colin Childs
Priority: Critical
Attachments: ScrollableStageTextTest.fxp
When calculating the global viewport during the initial layout of a
ScrollableStageText component, the y value can exceed the maximum allowed y
value of StageText, causing the app to crash. The exact y value required to
crash it varies based on scale, but globally, 8192 is the breaking point. This
became an issue for me when placing user generated content with text inputs
within a scroller.
To replicate:
1) Create a new application
2) Place a TextInput control inside the view with a large y value (~10,000)
3) Run the app and see it crash
I have included a sample mobile application that demonstrates this issue and a
workaround I used to fix it. As a workaround, I extend ScrollableStageText and
override getGlobalViewPort, setting the y value to the min of the globalRect.y
and stage.stageHeight, and the same for the x value as well.
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