Nice, it's good to get rid of so much boilerplate.

However when I change the system's own color scheme from Breeze to anything else and start Cuttlefish, the app itself uses that color scheme as expected, but the combobox's text is blank:

Also, the combobox's model appears to have duplicates for Breeze, Breeze Dark, and Breeze Light, which (correctly) don't show up in the colors KCM for me:

In D25273#561845, @ngraham wrote:

Nice, it's good to get rid of so much boilerplate.

However when I change the system's own color scheme from Breeze to anything else and start Cuttlefish, the app itself uses that color scheme as expected, but the combobox's text is blank:

I see what's happening. I copied that code form Kate and it reads the current color scheme name from kdeglobals but there can be a difference between the stored name and the user visible name. Especially when it includes a space or hyphen. So it works correctly for Breeze or Oxygen but not Breeze Dark or Oxygen cold.

In D25273#561847, @ngraham wrote:

Also, the combobox's model appears to have duplicates for Breeze, Breeze Dark, and Breeze Light, which (correctly) don't show up in the colors KCM for me:

Since this directly uses KColorSchemeManager, do you also see duplicated entries in Kate's color scheme menu?

In D25273#561847, @ngraham wrote:

Also, the combobox's model appears to have duplicates for Breeze, Breeze Dark, and Breeze Light, which (correctly) don't show up in the colors KCM for me:

I think I know what's happening. Do you have Breeze installed into the same prefix as cuttlefish in addition to system breeze? After doing so I also see the duplicate color. (The same happens in Kate)

In D25273#561852, @davidre wrote:

Since this directly uses KColorSchemeManager, do you also see duplicated entries in Kate's color scheme menu?

Yep.

In D25273#561875, @davidre wrote:

I think I know what's happening. Do you have Breeze installed into the same prefix as cuttlefish in addition to system breeze? After doing so I also see the duplicate color. (The same happens in Kate)

That's right.

Ping since system theme support is now in frameworks and plasma master can depend on frameworks master

In D25273#600583, @ngraham wrote:

Bad combobox width strikes again (https://bugs.kde.org/show_bug.cgi?id=403153), worsened by adding an icon:

Bah we should fix it finally if possible

Also, gross, there are duplicates

See above. Something to fix in KColorSchemeManager to not load the same theme twice if it has the same name as another one. (As the Colors KCM does)