On Tue, 3 Jan 2023 23:07:19 GMT, Andy Goryachev <ango...@openjdk.org> wrote:

>> A simple fix for the graphics of a `CheckBoxTreeCell` not showing after 
>> expand/collapse events. The graphics node needs to be released from the 
>> previous checkbox so that it doesn't serve as the graphics of more than one 
>> checkbox at once. If it does, only one checkbox (its skin) can actually use 
>> it as a scenegraph child, and it's not always the correct one.
>> 
>> Added also a manual test app as I'm unsure about how to do an automatic test 
>> for this. The test app will be useful for later fixes, so I suggest adding 
>> it anyway. To test the fix, simply expand and collapse the root note 
>> repeatedly while it has a child. Before the fix the graphic will disappear 
>> after a few tries, after the fix it won't. You can test other hierarchies as 
>> well by adding children to the tree.
>
> tests/performance/checkboxTreeView/.classpath line 1:
> 
>> 1: <?xml version="1.0" encoding="UTF-8"?>
> 
> minor: should this project be moved to manual tests hierarchy?
> 
> BTW, I am planning to create a monkey tester application which will include 
> many tests, to simplify the testing/verification of fixes JDK-8299335
> This code be added to the tester, either as a separate page, or as a data 
> source option for one of the TreeTableView page.

I wasn't sure exactly where to put it, but it's going to be used in a fix for 
performance issue I found when a node has many children.

If it will fit into a grater app I don't mind.

-------------

PR: https://git.openjdk.org/jfx/pull/970

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