[BLUEJ-1304] Dialog boxes have zero size under KDE Plasma

Using BlueJ 4.2.2 under Debian buster or sid (with the package provided on bluej.org), any dialog boxes opened by BlueJ have a zero size.

This first shows by the programm seemingly hanging on first start, when it asks for acknowledgement for telemetry — but it does not hang, the popup simply is a zero-sized window in the top left corner of the screen. It interacts normally on key presses (i.e. to select "No"). The same behaviour occurs for dialogs opened from within BlueJ (e.g. "About" or "Copyright" from the "Help" menu).

The issue only occurs under the KDE Plasma workspace, or better put, it is most imminent there. Under GNOME 3.34, most popups work as expected, but sometimes they also get a smaller size than they need. I can observe, e.g. the "About" popup, being opened in the top left corner, then being moved to the center of the main window and being resized as needed. In approx. 1 out of 10 tries, it gets resized, but not to the correct size.

Any activity on this issue by me is sponsored by the Debian Edu / Skolelinux project and Teckids e.V.

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Issue metadata

• Issue type: Bug
• Priority: Medium