RFR: 8236651: Simplify and update glass gtk backend

[Thiago Milczarek Sayao]

On Fri, 3 Apr 2020 15:21:29 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> I will keep testing it, but I think it's looking good.
>
> I see a lot of work going into this.
> 
> In order for this to progress beyond the prototype or concept phase, we will need to have a discussion on the openjfx-dev mailing list in a separate email thread that is not directly tied to the PR -- meaning not a reply to the RFR thread and not a comment in the PR.
> 
> @tsayao When you are ready, please send a short email (not a reply to any existing message) to openjfx-dev at openjdk.java.net with the following:
> 
> 1. A short summary of the proposed enhancement
> 2. The goals of the proposed enhancement
> 3. A description of the proposed changes (basically, the bullet items from the description of this PR)
> 4. A pointer to this PR for reference
> 
> I want to focus the openjfx-dev discussion on getting general agreement on the overall approach rather than on the details of the code changes. This is a big change, so getting feedback on the overall goals and approach is important; review comments in the PR aren't the best way to have that discussion.
> 
> We aren't following the formal JEP process for JavaFX features, but the JEP template in [JEP 2](https://openjdk.java.net/jeps/2) is a good format to follow for large or high-impact features to make sure that the motivation, goals, and tradeoffs are documented.
> 
> Finally, I note that this will eventually need a CSR, but that can be done once there is agreement on the approach, and when this is farther along in the review process.

@kevinrushforth Ok, will do as the instructions. Thanks.

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PR: https://git.openjdk.java.net/jfx/pull/77