Incorrect tooltip position #4252

[ep9io]

The pull request sets the GDK_BACKEND environment variable is explicitly set to x11 when wayland is detected. This forces GTK-based HOP to use X11 rendering, making it compatible in Wayland sessions. The rest of the Linux-specific logic related to classpath and architecture is preserved as-is.

Below is a screenshot showing the issue resolved when GDK_BACKEND=x11 is applied and the mouse is hovered over the hop line near the success instead of the top-left corner.

NOTE: This pull request also addresses related issues spotted when hovering over pipeline arrows, the welcome dialog and other dialogs appearing in the top-left of the screen.

Additional Information:

The issue was reproduced on Fedora 39 running Wayland and goes away with the attached pull request.

The issue appears to be related to SWT/GDK when on Wayland (see eclipse tickets below).

• Wayland support in experimental state despite being introduced in stable releases eclipse-platform/eclipse.platform.swt#639
• Shell.setLocation doesn't work properly (or at all) on Wayland eclipse-platform/eclipse.platform.swt#790

Can't confirm if related or if it resolves issue #4441.

In addition, an observation with the dialogs in that adding ON_TOP to the style mitigates, but does not eliminate the issue. This was obtained from eclipse-platform/eclipse.platform.swt#790.

shell = new Shell(parent, SWT.ON_TOP | SWT.DIALOG_TRIM | SWT.CLOSE | SWT.RESIZE | SWT.MAX);

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[ep9io]

Only after noticing that the PR also included 26e38a5 and 00a3249, which should not cause an issue. I branched off a development branch that I keep locally.

[hansva]

awesome @ep9io !

[ep9io]

It's really only a workaround. The issue with not running properly under Wayland is still there, however.

[hansva]

Yes, but reading the tickets it seems like an SWT issue so we can't really do much about it on our side.