RFR: 8320965: Scrolling on a touch enabled display fails on Wayland [v2]

[Jose Pereda]

On Mon, 18 Dec 2023 10:09:29 GMT, Thiago Milczarek Sayao <tsayao at openjdk.org> wrote:

>> I take `GdkSeat` is available since GTK 3.0? https://docs.gtk.org/gdk3/class.Seat.html
>> 
>> But don't we have a minimum set on 3.8.0?
>> 
>> Would this work?
>> 
>> #if GTK_CHECK_VERSION(3, 0, 0)
>> static GdkSeat * (*_gdk_display_get_default_seat) (GdkDisplay *display);
>> GdkSeat * wrapped_gdk_display_get_default_seat (GdkDisplay *display)
>> {...}
>> #endif
>> 
>> ...
>> 
>> #if GTK_CHECK_VERSION(3, 0, 0)
>>     GdkSeat* seat = wrapped_gdk_display_get_default_seat(gdk_window_get_display(window));
>>     if (seat != NULL && _gdk_seat_grab != NULL) {
>>         *status = ...
>>         return TRUE;
>>     }
>> #endif
>
> I think the docs are wrong, I probably exists since 3.20, so maybe check for `GTK_CHECK_VERSION(3, 20, 0);`.
> 
> 
> This is the compilation error on Ubuntu 16.04:
> `/home/tsayao/jose/jfx/modules/javafx.graphics/src/main/native-glass/gtk/wrapped.c:200:34: error: unknown type name ‘GdkSeat’
> `

Okay, that is unfortunate (GTK docs inaccurate), but makes sense.

I'll add the compile-time checks to `wrapped.c`.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1305#discussion_r1429864963