diff --git a/desktoppackage/contents/views/Panel.qml b/desktoppackage/contents/views/Panel.qml
--- a/desktoppackage/contents/views/Panel.qml
+++ b/desktoppackage/contents/views/Panel.qml
@@ -20,6 +20,7 @@
 import QtQuick.Layouts 1.1
 
 import org.kde.plasma.core 2.0 as PlasmaCore
+import org.kde.taskmanager 0.1 as TaskManager
 
 PlasmaCore.FrameSvgItem {
     id: root
@@ -34,6 +35,64 @@
 
     readonly property bool verticalPanel: containment && containment.formFactor === PlasmaCore.Types.Vertical
 
+    property bool preferOpaque: false
+
+    TaskManager.VirtualDesktopInfo {
+        id: virtualDesktopInfo
+    }
+
+    TaskManager.ActivityInfo {
+        id: activityInfo
+    }
+
+    TaskManager.TasksModel {
+        filterByVirtualDesktop: true
+        filterByActivity: true
+
+        virtualDesktop: virtualDesktopInfo.currentDesktop
+        activity: activityInfo.currentActivity
+
+        screenGeometry: panel.screenGeometry
+        id: tasksModel
+        groupMode: TaskManager.TasksModel.GroupDisabled
+        onActiveTaskChanged: {
+            visibleWindowsModel.sourceModel = tasksModel
+        }
+        onDataChanged: checkMaximized()
+    }
+
+    PlasmaCore.SortFilterModel {
+        id: visibleWindowsModel
+        filterRole: 'IsMinimized'
+        filterRegExp: 'false'
+        sourceModel: tasksModel
+    }
+
+    function checkMaximized() {
+        for (var i = 0; i < visibleWindowsModel.count; i++) {
+            var window = visibleWindowsModel.get(i)
+            if (window.IsMaximized) {
+                preferOpaque = true
+                return
+            }
+            preferOpaque = false
+        }
+    }
+
+    PlasmaCore.FrameSvgItem {
+        id: opaqueOverlay
+        opacity: preferOpaque
+            Behavior on opacity {
+                PropertyAnimation {
+                    duration: units.veryLongDuration
+                    easing.type: Easing.InOutQuad
+                }
+        }
+        imagePath: "opaque/widgets/panel-background" 
+        enabledBorders: panel.enabledBorders
+        anchors.fill: parent
+    }
+
     function adjustPrefix() {
         if (!containment) {
             return "";