RFR: 8236651: Simplify and update glass gtk backend

Kevin Rushforth kcr at openjdk.java.net
Mon Jan 6 14:25:35 UTC 2020

On Mon, 6 Jan 2020 14:10:52 GMT, Thiago Milczarek Sayao <tsayao at openjdk.org> wrote:

>> This proposed change does the following:
>> - Ports DND target to use GTK reducing code size and adding extra text / image formats (such as .gif);
>> - Use gtk signals instead of gdk events (also to reduce code size);
>> - Simplifies geometry (sizing/positioning) with a more straightforward code (less special cases) ;
>> - Replaces (pointer and focus) grabbing with a gtk approach;
>> - Reworked frame extents (the wm extension to get decoration sizes) to reduce size and complexity;
>> - Simplified cursor changing;
>> - Reduced the use of gtk/gdk deprecated functions;
>> In general it reduces code size and complexity and hands more work to gtk.
>> Important notice: As I could not test the code for handling web start and web applets because browsers do not support it anymore and java has removed "javaws", I took the liberty to remove the code. Will restore if necessary.
>> Please, mark it as **WIP**. 
>> ![image](https://user-images.githubusercontent.com/30704286/71791073-58779d00-3012-11ea-89e5-07588f7a41cc.png)
> There are still some sizing issues that I am aware of.

> Please, mark it as WIP.

You can do this by editing the title and adding `WIP: ` as a prefix.


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

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