taskmanager: fix null visualParent error in GroupDialog
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Developer
I am curious that why Binding.when was not working here. Shouldn't the expression not be evaluated when the condition is false?
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Author Developer
You'd hope, but I guess not 100% of the time.
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Developer
The order of evaluation is not specified. Qml engine has no idea that evaluation
when
should have higher priority than re-evaluatingvalue
. It's pure random, and so any potential null access should be guarded with checks.
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