KItemListWidget: bump selection alpha and use Active palette group

Selection background was 0.32 alpha of QPalette::Highlight resolved
against the widget's current palette group. On dark color schemes the
Inactive group sources Highlight from Colors:Window (per KColorScheme's
ChangeSelectionColor effect), so a near-black Window at 0.32 alpha
leaves the selection nearly invisible. Force the Active group so the
scheme's Selection color is used, and raise the alphas (selected
0.32 → 0.70, selected+hovered 0.40 → 0.85, hover-only 0.06 → 0.12) for
adequate contrast on all-dark themes.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

1 files changed, 5 insertions, 5 deletions

diff --git a/src/kitemviews/kitemlistwidget.cpp b/src/kitemviews/kitemlistwidget.cpp
index e792844b0..1650ea190 100644
--- a/src/kitemviews/kitemlistwidget.cpp
+++ b/src/kitemviews/kitemlistwidget.cpp
@@ -640,18 +640,18 @@ 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)};
+        QColor backgroundColor{widget->palette().color(QPalette::Active, QPalette::Highlight)};
         backgroundColor.setAlphaF(0.0);
         if (m_clickHighlighted) {
             backgroundColor.setAlphaF(1.0);
         } else {
             if (m_selected && m_hovered) {
-                backgroundColor.setAlphaF(0.40);
+                backgroundColor.setAlphaF(0.85);
             } else if (m_selected) {
-                backgroundColor.setAlphaF(0.32);
+                backgroundColor.setAlphaF(0.70);
             } else if (m_hovered) {
                 backgroundColor = widget->palette().color(QPalette::Text);
-                backgroundColor.setAlphaF(0.06);
+                backgroundColor.setAlphaF(0.12);
             }
         }
         painter->setRenderHint(QPainter::Antialiasing);
@@ -664,7 +664,7 @@ void KItemListWidget::drawItemStyleOption(QPainter *painter, QWidget *widget, QS
 
         // Focus decoration
         if (current) {
-            QColor focusColor{widget->palette().color(QPalette::Highlight)};
+            QColor focusColor{widget->palette().color(QPalette::Active, QPalette::Highlight)};
             // Set the pen color lighter or darker depending on background color
             focusColor = m_styleOption.palette.color(QPalette::Base).lightnessF() > 0.5 ? focusColor.darker(110) : focusColor.lighter(110);
             focusColor.setAlphaF(m_selected || m_hovered ? 1.0 : 0.8);