Font/UI sizing issue on HiDPI display

[peterzen]

When running the application on a HiDPI screen in high resolution, the font size can be too small to the point of being unreadable as the application does not honor the display scaling setting.

Is there a way to specify a scale factor via a Java/JavaFX environment variable, similarly to how Qt apps honor $QT_SCALE_FACTOR?

Platform: Dell XPS 13" display, Ubuntu 17.10, default display settings, resolution 3200x1800, scale: 200%

[sqrrm]

Bisq doesn't scale the UI on HiDPI monitors with linux since JavaFX doesn't handle the scaling in Java 8. Once upgraded to Java 9 it will work but there are some issues with switching to Java 9, see #1262

[peterzen]

Thanks @sqrrm, I suspected this was the case but couldn't find this issue - I'll keep an eye on it.

[ManfredKarrer]

We plan to use Java 9 soon. Hope that will fix it.

[2m]

Java 9 added support for HiDPI in Linux and Windows: http://openjdk.java.net/jeps/263

That is, when using Java 9 the GDK_SCALE environment variable is considered and windows are scaled accrodingly.

Eagerly waiting for the upgrade of bisq to Java 9.

[ripcurlx]

@2m @peterzen Could you please verify if this issue is solved with our latest release 0.9+ (Java 10)?

[ysangkok]

Not fixed in 0.9.1.

[ripcurlx]

@ysangkok Thanks - I'll have a look if there is an easy way to resize everything based on the OS scale factor.

[ysangkok]

But if I launch with GDK_SCALE=2 ./Bisq, it does scale. Some hacky launcher that can read the Ubuntu scale from Gconf would work, I guess... Really the Java runtime should detect this, so I guess this can still be considered a Java bug, even if you do ship Java.

[ripcurlx]

Thanks for the input! Maybe we can modify our javapackager setup to do so until it is fixed properly within Java.

[peterzen]

On Ubuntu 18.04 with OpenJDK 10.0.2 it honors both GDK_SCALE and the org.gnome.desktop.interface scaling-factor setting, all good.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed because of inactivity. Feel free to reopen it if you think it is still relevant.

[blackbookpro]

Bisq is displayed way too small on Ubuntu 20.04 on a Macbook Pro 15" Display (2880 x 1800). Is there a way to scale the view? Would appreciate any help!

[ripcurlx]

@blackbookpro Did you have already a look at this short guide: #4541 (comment)

[mateMathieu]

Hi, I did the trick that is documented in the FAQ to adjust the scaling for HiDPI screens, but at the following update the whole thing is wiped out.
Can't we find a better way that would avoid this?

It would also be nice to work with both GTK and QT.

Please! :)