RFR: 8278759 : PointerEvent: buttons property set to 0 when mouse down

[Kevin Rushforth]

On Thu, 24 Feb 2022 18:46:21 GMT, Hima Bindu Meda <duke at openjdk.java.net> wrote:

> Basically, buttons property is a mask which represents the button/buttons clicked on the mouse.
>     It is observed that event.buttons property is set to 0 when there is mouse press or drag event.This behaviour is observed only with javafx webView.Other browsers set the buttons property to 1, when there is mouse press or drag.
>      The issue happens because the buttons property is not updated in the framework.
>      Added implementation to update and propagate the buttons property from javafx platform to native webkit.Added a robot test case for the same.
>    Performed sanity testing with the added implementation and the buttons property is compliant with the specification mentioned in https://w3c.github.io/pointerevents/#the-buttons-property.

@arapte @jaybhaskar Can you also review?

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PR: https://git.openjdk.java.net/jfx/pull/742