---
title: "What even are Breeze, QtQuick, QtWidget, Union..?"
url: https://daily.dev/posts/what-even-are-breeze-qtquick-qtwidget-union--x78ztlyp2
source_url: https://akselmo.dev/posts/what-are-breeze-widgets-quick-union/
type: article
source: "Lobsters"
published: 2026-03-01T22:27:45.392Z
updated: 2026-03-15T04:11:31.546Z
tags: ["linux", "qml", "qt"]
reading_time: 5
upvotes: 2
comments: 0
language: en
---

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# What even are Breeze, QtQuick, QtWidget, Union..?

**[Lobsters](https://daily.dev/sources/lobsters)** · 5 min read · 2 upvotes · 0 comments

## Summary

A plain-language explanation of the KDE UI stack components: QtWidgets (older C++ UI framework), QtQuick/QML (modern declarative UI), Breeze (the current KDE style/theme), qqc2-desktop-style (Breeze for QtQuick), Kirigami (shared QtQuick components), and Union (a new style engine that uses CSS as a single source of truth to keep QtWidgets and QtQuick visually consistent). The post highlights the current pain point of manually syncing styles across two different toolkits and explains how Union aims to solve this by unifying style output, with potential future support for GTK and other toolkits.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://akselmo.dev/posts/what-are-breeze-widgets-quick-union/>

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Tags: [#linux](https://daily.dev/tags/linux), [#qml](https://daily.dev/tags/qml), [#qt](https://daily.dev/tags/qt)

[View this post on daily.dev](https://daily.dev/posts/what-even-are-breeze-qtquick-qtwidget-union--x78ztlyp2)