Integrated: 8252935: Add treeShowing listener only when needed

[John Hendrikx]

On Fri, 17 Apr 2020 08:06:23 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

> This is a PoC for performance testing.  
> 
> It contains commented out code in PopupWindow and ProgressIndicatorSkin and two tests are failing because of that.
> 
> This code avoids registering two listeners (on Scene and on Window) for each and every Node to support the aforementioned classes.  The complete change should update these two classes to add their own listeners instead.

This pull request has now been integrated.

Changeset: 47338244
Author:    John Hendrikx <jhendrikx at openjdk.org>
Committer: Kevin Rushforth <kcr at openjdk.org>
URL:       https://git.openjdk.java.net/jfx/commit/47338244
Stats:     771 lines in 8 files changed: 653 ins; 109 del; 9 mod

8252935: Add treeShowing listener only when needed

Reviewed-by: kcr, arapte

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PR: https://git.openjdk.java.net/jfx/pull/185