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https://issues.apache.org/jira/browse/FLEX-34364?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tamás Nepusz updated FLEX-34364:
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Attachment: ButtonDownBugTest.fxp
Flash Builder project that reproduces the issue.
> FlexEvent.BUTTON_DOWN events are sometimes lost
> -----------------------------------------------
>
> Key: FLEX-34364
> URL: https://issues.apache.org/jira/browse/FLEX-34364
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: Button
> Affects Versions: Apache Flex 4.12.0
> Environment: Mac OS X 10.9, Apache Flex 4.12.1 + AIR 13
> Reporter: Tamás Nepusz
> Priority: Minor
> Attachments: ButtonDownBugTest.fxp
>
>
> {{FlexEvent.BUTTON_DOWN}} events are sometimes not fired for Spark Buttons.
> More precisely, they are _usually_ not fired (in ~80% of the cases) when I
> click on the button by tapping the touchpad of my MacBook Pro _and_ the
> window that contains the button is not the first window of the application.
> The events are _always_ fired properly when I click on the button using the
> mouse or the button at the bottom of my touchpad, _or_ when the button is
> contained in the first window of the application.
> I strongly suspect that this happens because {{FlexEvent.BUTTON_DOWN}} events
> are dispatched in {{ButtonBase.commitProperties()}}, but the
> {{MouseEvent.MOUSE_DOWN}} and {{MouseEvent.MOUSE_UP}} events happen so
> quickly when I tap the touchpad that {{ButtonBase.commitProperties()}} only
> gets a chance to run when the button is already up again (although this does
> not explain why it is not a problem for the first window of the application).
> This is not a big issue on its own, but note that {{DropDownController}}
> relies on the {{BUTTON_DOWN}} event to decide when to open the dropdown in a
> {{DropDownList}}, so Spark dropdowns do not work reliably in the presence of
> this bug.
> Steps to reproduce:
> # You might have to get a Mac to reproduce this issue.
> # Open the attached project.
> # Tap on the button of the first window that opens using the touchpad. Note
> that you get both a {{BUTTON_DOWN}} event and a {{CLICK}} event, and these
> are logged properly in the list shown below the button.
> # Open a new window by clicking on the button in the lower right corner.
> # Tap on the button of the new window a few times. Note that {{CLICK}} events
> are always dispatched, but in ~80% of the cases they are not preceded by a
> {{BUTTON_DOWN}} event.
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