[plasma/union/Plasma/6.7] src/output/qtquick/plugin: output/quick: Complete incompleted ancestors on QuickElement completion

Git commit f7e3ad979f011b61da76655af60f01b3fb8a38f7 by Arjen Hiemstra.
Committed on 16/07/2026 at 18:52.
Pushed by ahiemstra into branch 'Plasma/6.7'.

output/quick: Complete incompleted ancestors on QuickElement completion

Some ancestors of a QuickElement may end up never getting
`componentCompleted()` called. This would result in them being in an
incomplete state which breaks things. Fix this by manually checking if
all ancestors that are not attached to a QQuickItem are completed, and
if not, complete them.

Ultimately we probably need a different trigger than componentComplete()
to handle these cases, but right now this suffices.


(cherry picked from commit 1d4e624af84fb95e4dc0eb1cd8db3f2c31f773bc)

Co-authored-by: Arjen Hiemstra <[email protected]>

M  +14   -0    src/output/qtquick/plugin/QuickElement.cpp

https://invent.kde.org/plasma/union/-/commit/f7e3ad979f011b61da76655af60f01b3fb8a38f7

diff --git a/src/output/qtquick/plugin/QuickElement.cpp b/src/output/qtquick/plugin/QuickElement.cpp
index 3edf382e..53f647ed 100644
--- a/src/output/qtquick/plugin/QuickElement.cpp
+++ b/src/output/qtquick/plugin/QuickElement.cpp
@@ -436,6 +436,20 @@ void QuickElement::componentComplete()
     updateHints();
     updateAttributes();
     update();
+
+    // It is possible that `QQuickAttachedPropertyPropagator::initialize()`
+    // creates QuickElement instances that are not attached to a QQuickItem for
+    // which `componentComplete()` does not get called. So go through our
+    // ancestors once and ensure `componentComplete()` is called at least once
+    // for these elements, otherwise they are in a defunct state and do not work
+    // properly.
+    auto element = parentElement();
+    while (element) {
+        if (!element->m_completed && !qobject_cast<QQuickItem *>(element->parent())) {
+            element->componentComplete();
+        }
+        element = element->parentElement();
+    }
 }
 
 void QuickElement::setActiveStates(Union::Element::States newActiveStates)