There are a few comboboxes in System Settings KCMs that don't show all items in the pop-up when clicked on. Hoerver if you mouse wheel over the button, it will still cycle through all items. This bug affects the Fonts KCM's "Sub-Pixel Rendering" and "Hinting" comboboxes, and the "Window Border Size" combobox in the ported Window Decorations KCM from https://phabricator.kde.org/D18458.
Git commit 152bb7363a803a8099367cc7f423b9b8180f0ba4 by David Edmundson. Committed on 30/01/2019 at 01:55. Pushed by davidedmundson into branch 'master'. Fix combobox initial sizing Summary: We have a listview in a popup. The popup is resized to the listview content height. Because the popup starts out at size 0 the listview thinks it's too small to show anything. So it doesn't load any delegates. As it has no delegates it can't guess the contentHeight. contentHeight is a guess based on count * (currentHeight / currentlyLoadedDelegates) That means the popup doesn't resize properly. Ultimately it does end up showing a two entries, but it doesn't re-evaluate the contentHeight properly to resize the popup correctly. Forcing it to load one delegate is enough to break that cycle. Test Plan: Opened popup in cursortheme and fonts Worked correctly Reviewers: #plasma, mart, ngraham Reviewed By: #plasma, mart, ngraham Subscribers: plasma-devel Tags: #plasma Differential Revision: https://phabricator.kde.org/D18597 M +5 -0 org.kde.desktop/ComboBox.qml https://commits.kde.org/qqc2-desktop-style/152bb7363a803a8099367cc7f423b9b8180f0ba4