disable background effect when having transparency

app/dockview.cpp

@@ -198,6 +198,7 @@ void DockView::init()
         updateFormFactor();
         syncGeometry();
     });
+    connect(this, &DockView::dockTransparencyChanged, this, &DockView::updateEffects);
     connect(this, &DockView::drawEffectsChanged, this, &DockView::updateEffects);
     connect(this, &DockView::effectsAreaChanged, this, &DockView::updateEffects);
 
@@ -1087,6 +1088,21 @@ void DockView::setOffset(int offset)
     emit offsetChanged();
 }
 
+int DockView::dockTransparency() const
+{
+    return m_dockTransparency;
+}
+
+void DockView::setDockTransparency(int transparency)
+{
+    if (m_dockTransparency == transparency) {
+        return;
+    }
+
+    m_dockTransparency = transparency;
+    emit dockTransparencyChanged();
+}
+
 int DockView::shadow() const
 {
     return m_shadow;
@@ -1133,10 +1149,11 @@ void DockView::updateEffects()
 
             KWindowEffects::enableBlurBehind(winId(), true, fixedMask);
 
+            bool drawBackgroundEffect = m_theme.backgroundContrastEnabled() && (m_dockTransparency == 100);
             //based on Breeze Dark theme behavior the enableBackgroundContrast even though it does accept
             //a QRegion it uses only the first rect. The bug was that for Breeze Dark there was a line
             //at the dock bottom that was distinguishing it from other themes
-            KWindowEffects::enableBackgroundContrast(winId(), m_theme.backgroundContrastEnabled(),
+            KWindowEffects::enableBackgroundContrast(winId(), drawBackgroundEffect,
                     m_theme.backgroundContrast(),
                     m_theme.backgroundIntensity(),
                     m_theme.backgroundSaturation(),

app/dockview.h

@@ -60,6 +60,7 @@ class DockView : public PlasmaQuick::ContainmentView {
 
     Q_PROPERTY(int alignment READ alignment WRITE setAlignment NOTIFY alignmentChanged)
     Q_PROPERTY(int docksCount READ docksCount NOTIFY docksCountChanged)
+    Q_PROPERTY(int dockTransparency READ dockTransparency WRITE setDockTransparency NOTIFY dockTransparencyChanged)
     Q_PROPERTY(int totalDocksCount READ totalDocksCount NOTIFY totalDocksCountChanged)
     Q_PROPERTY(int x READ x NOTIFY xChanged)
     Q_PROPERTY(int y READ y NOTIFY yChanged)
@@ -120,6 +121,9 @@ public:
     float maxLength() const;
     void setMaxLength(float length);
 
+    int dockTransparency() const;
+    void setDockTransparency(int transparency);
+
     int maxThickness() const;
     void setMaxThickness(int thickness);
 
@@ -202,6 +206,7 @@ signals:
     void currentScreenChanged();
     void dockLocationChanged();
     void docksCountChanged();
+    void dockTransparencyChanged();
     void dockWinBehaviorChanged();
     void drawShadowsChanged();
     void drawEffectsChanged();
@@ -254,6 +259,7 @@ private:
     bool m_drawShadows{true};
     bool m_drawEffects{false};
     bool m_onPrimary{true};
+    int m_dockTransparency{100};
     int m_maxThickness{24};
     int m_normalThickness{24};
     int m_offset{0};

containment/package/contents/ui/VisibilityManager.qml

@@ -85,6 +85,13 @@ Item{
         value: root.behaveAsPlasmaPanel
     }
 
+    Binding{
+        target: dock
+        property: "dockTransparency"
+        when: dock
+        value: root.panelTransparency
+    }
+
     Binding{
         target: dock
         property: "drawShadows"