Double click instead single-click

[4iki40k]

Operating System

Other, Linux

Description of bug

Operating system is arch linux + plasma + wayland.
Single clicks are being registered as double clicks across the MultiMC interface. This happens regardless of plasma system settings (which are set to "Double-click to open"). This issue does not occur in any other applications.

Steps to reproduce

Open MultiMC.
Perform a single left-click on any Minecraft instance.
The instance launches immediately (incorrect behavior) instead of just being selected (correct behavior).
Go to the "Loader mods" section of any instance.
Perform a single click on a mod name to select it.
Observe that the checkbox toggles automatically, even though only a selection was intended.

Suspected cause

No response

This issue is unique

• I have searched the issue tracker and did not find an issue describing my bug.

[phit]

Multimc hasnt updated its QT5 version in years, if this is broken now, that's probably something with your DE or your QT5 settings

[Meduris]

Just a heads up for anyone else running into this... from what I found KDE or QT changed the default for that option between Plasma 5 and 6.

KDE with Plasma/QT6 (at least on my system) did not bother writing the option to its config file if set to double click for opening files as that is already the default, QT5 interprets this as "single click to open files" being active though.

The fix is to explicitly set the option in the config file either by running
kwriteconfig5 --file kdeglobals --group KDE --key SingleClick false

or by manually editing ~/.config/kdeglobals and adding SingleClick=false to the KDE section.

After restarting multimc this fixed the behavior at least on my cachyos install.