[eclipse-sig] [Bug 1500412] New: Eclipse + Wayland + HiDPI = huge icons

https://bugzilla.redhat.com/show_bug.cgi?id=1500412

            Bug ID: 1500412
           Summary: Eclipse + Wayland + HiDPI = huge icons
           Product: Fedora
           Version: 27
         Component: eclipse
          Assignee: akurtako(a)redhat.com
          Reporter: rderooy(a)lenovo.com
        QA Contact: extras-qa(a)fedoraproject.org
                CC: akurtako(a)redhat.com, andjrobins(a)gmail.com,
                    dbhole(a)redhat.com, ebaron(a)fedoraproject.org,
                    eclipse-sig(a)lists.fedoraproject.org,
                    jerboaa(a)gmail.com, jjohnstn(a)redhat.com,
                    krzysztof.daniel(a)gmail.com, lef(a)fedoraproject.org,
                    mat.booth(a)redhat.com, rgrunber(a)redhat.com



Created attachment 1336784
  --> https://bugzilla.redhat.com/attachment.cgi?id=1336784&action=edit
Eclipse screenshot with large icons

Description of problem:
When running Eclipse on Wayland on a HiDPI display, icons in title bars and
menus get super sized which causes very little space to be available for other
things.

This also happens in any drop down lists with icons in them, causing them not
to fit on the display.

What seems to happen is that instead of the icons getting double scaled, they
are getting scaled up twice to a 4x scaling.

This does not happen when running the same version of Eclipse on X11, it also
does not happen with any other applications on Wayland

Version-Release number of selected component (if applicable):
eclipse-platform-4.7.1-6.fc27.x86_64
gtk3-3.22.24-1.fc27.x86_64
xorg-x11-server-Xwayland-1.19.3-8.fc27.x86_64

How reproducible:
every time

Steps to Reproduce:
1. HiDPI / UHD / 4K display
2. Wayland
3. start eclipse

Actual results:
Huge icons

Expected results:
icons scaled to 2x

Additional info:
If before starting Eclipse, I change the gnome display settings to 100x instead
of the 200x scaling and then start Eclipse the icons are sized properly
compared to the rest of the elements. Only issue is that everything is then
very small and hard to read. If I change the setting while Eclipse is running I
get strange results.

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