In my system settings, I have configured KDE to use double clicks to "open files and folders " (as the explanation says) Now I have to also use double clicks e.g. to "enter" the different top level items on the main screen. ("People", "Places", ...) Even if I want to select an entry in "Settings/Birthdays", I need a double click. These turn to single clicks, if I change this KDE setting. But because I want this "single click to just select", this is no good option. The behaviour had been single clicks, irrespective of the settings in previous versions. (So I assume this is an effect of KDE4 <=> 5 and not a conscious change in KPA itself) I'm using openSUSE Leap 42.2 as OS (QT 5.6.1; KDE Plasma 5.8.3, KDE Framework 5.26.0)
Sorry for not responding way sooner. Somehow I overlooked and/or forgot it… I can confirm the issue, and it is not an intended change. Thanks for reporting!
For future reference, the new behavior is caused by Plasma now enforcing a unified look and feel via use of QStyle. I guess one *could* argue that browsing categories should work the same as browsing files. The Birthdays Page in the Settings dialog, however, is definitely behaving incorrectly. See also: https://api.kde.org/frameworks/frameworkintegration/html/classKStyle.html
Git commit dca2a7cab56d1632df33ae2dfeb5e078a2d1e853 by Johannes Zarl-Zierl. Committed on 05/01/2019 at 21:59. Pushed by johanneszarl into branch 'master'. Fix item activation when workspace is set up for double-clicks. When the workspace behavior is set to use double-clicks (as configured using "kcmshell5 kcm_workspace"), then kphotoalbum would require double-clicks for the following items: 1. Selecting an item in the BrowserPage (i.e. when browsing categories) 2. Selecting a person in the birthday settings page 3. Selecting a tag/category in the tag groups settings page This has now been fixed to use single clicks for the items mentioned above. M +2 -2 Browser/BrowserWidget.cpp M +1 -1 Settings/BirthdayPage.cpp M +1 -1 Settings/TagGroupsPage.cpp https://commits.kde.org/kphotoalbum/dca2a7cab56d1632df33ae2dfeb5e078a2d1e853