RFR: 8316423: [linux] Secondary Stage does not respect Scene's dimensions when shown

[Kevin Rushforth]

On Thu, 28 Sep 2023 00:31:59 GMT, Thiago Milczarek Sayao <tsayao at openjdk.org> wrote:

> It looks like a condition between calls from `set_visible` to `request_focus`. When `request_focus` is called, the window is not yet mapped (map is requested on `set_visible`). 
> 
> 200x200 is the default gtk window size if none is specified. Since the window is presented at the requested size and then changes to 200x200 I would guess the size request on `gtk_window_present` (which is called on `request_focus`) is being queued and released later. But I'm not really sure.
> 
> With this change immediate `request_focus` after the window is created will be ignored. But the default is to request focus on map, so it will work. `request_focus` will only be useful when called after the window is mapped (presented on the screen).
> 
> This also fixes [JDK-8316425](https://bugs.openjdk.org/browse/JDK-8316425)

@lukostyra Can you also review?

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PR Comment: https://git.openjdk.org/jfx/pull/1249#issuecomment-1738981345