KItemListWidget: stop overriding style‑provided background brushHEADmaster

The previous implementation forced a custom background colour
before delegating to the style's PE_PanelItemViewItem primitive.
This interferes with theme‑specific drawing and results in a hard‑coded, 
non‑themed highlight that breaks styling across themes.

Remove the explicit brush assignment, allowing the style to
paint the background itself. The focus rectangle handling remains
unchanged and is still drawn only for the active item.
And pass  the State_MouseOver to focus rect style option when hovered.

1 files changed, 17 insertions, 16 deletions

diff --git a/src/kitemviews/kitemlistwidget.cpp b/src/kitemviews/kitemlistwidget.cpp
index b94cf6064..32118c569 100644
--- a/src/kitemviews/kitemlistwidget.cpp
+++ b/src/kitemviews/kitemlistwidget.cpp
@@ -623,21 +623,6 @@ void KItemListWidget::setPressed(bool enabled)
 void KItemListWidget::drawItemStyleOption(QPainter *painter, QWidget *widget, QStyle::State styleState)
 {
     painter->save();
-    // Shared between both Breeze and other styles
-    QColor backgroundColor{widget->palette().color(QPalette::Highlight)};
-    backgroundColor.setAlphaF(0.0);
-    if (m_clickHighlighted) {
-        backgroundColor.setAlphaF(1.0);
-    } else {
-        if (m_selected && m_hovered) {
-            backgroundColor.setAlphaF(0.40);
-        } else if (m_selected) {
-            backgroundColor.setAlphaF(0.32);
-        } else if (m_hovered) {
-            backgroundColor = widget->palette().color(QPalette::Text);
-            backgroundColor.setAlphaF(0.06);
-        }
-    }
     QStyleOptionViewItem viewItemOption;
     initStyleOption(&viewItemOption);
     viewItemOption.state = styleState;
@@ -649,6 +634,20 @@ void KItemListWidget::drawItemStyleOption(QPainter *painter, QWidget *widget, QS
     // TODO: Remove this check after Plasma 6.8 release
     // See: https://invent.kde.org/plasma/breeze/-/merge_requests/595
     if (style()->name() == QStringLiteral("breeze")) {
+        QColor backgroundColor{widget->palette().color(QPalette::Highlight)};
+        backgroundColor.setAlphaF(0.0);
+        if (m_clickHighlighted) {
+            backgroundColor.setAlphaF(1.0);
+        } else {
+            if (m_selected && m_hovered) {
+                backgroundColor.setAlphaF(0.40);
+            } else if (m_selected) {
+                backgroundColor.setAlphaF(0.32);
+            } else if (m_hovered) {
+                backgroundColor = widget->palette().color(QPalette::Text);
+                backgroundColor.setAlphaF(0.06);
+            }
+        }
         painter->setRenderHint(QPainter::Antialiasing);
         constexpr int roundness = 5; // From Breeze style.
         constexpr qreal penWidth = 1.25;
@@ -668,7 +667,6 @@ void KItemListWidget::drawItemStyleOption(QPainter *painter, QWidget *widget, QS
             painter->strokePath(path, pen);
         }
     } else {
-        viewItemOption.backgroundBrush = backgroundColor;
         style()->drawPrimitive(QStyle::PE_PanelItemViewItem, &viewItemOption, painter, widget);
 
         // Focus decoration
@@ -679,6 +677,9 @@ void KItemListWidget::drawItemStyleOption(QPainter *painter, QWidget *widget, QS
             if (m_selected && widget->hasFocus()) {
                 focusRectOption.state = QStyle::State_HasFocus | QStyle::State_Selected;
             }
+            if (m_hovered) {
+                 focusRectOption.state |= QStyle::State_MouseOver;
+            }
             focusRectOption.rect = viewItemOption.rect;
             style()->drawPrimitive(QStyle::PE_FrameFocusRect, &focusRectOption, painter, widget);
         }