Use independent toolTipDelegate for each item.

BUG: 434657

applets/taskmanager/package/contents/ui/Task.qml

@@ -314,6 +314,11 @@ MouseArea {
             Component.onCompleted: timer.start()
         }
     }
+    
+    ToolTipDelegate {
+        id: toolTipDelegate
+        visible: false
+    }
 
     PlasmaCore.FrameSvgItem {
         id: frame

applets/taskmanager/package/contents/ui/main.qml

@@ -221,7 +221,6 @@ MouseArea {
         id: backend
 
         taskManagerItem: tasks
-        toolTipItem: toolTipDelegate
         groupDialog: groupDialog
         highlightWindows: plasmoid.configuration.highlightWindows
 
@@ -410,12 +409,6 @@ MouseArea {
         }
     }
 
-    ToolTipDelegate {
-        id: toolTipDelegate
-
-        visible: false
-    }
-
     TaskList {
         id: taskList
 

applets/taskmanager/plugin/backend.cpp

@@ -109,22 +109,6 @@ void Backend::setTaskManagerItem(QQuickItem *item)
     }
 }
 
-QQuickItem *Backend::toolTipItem() const
-{
-    return m_toolTipItem;
-}
-
-void Backend::setToolTipItem(QQuickItem *item)
-{
-    if (item != m_toolTipItem) {
-        m_toolTipItem = item;
-
-        connect(item, &QQuickItem::windowChanged, this, &Backend::toolTipWindowChanged);
-
-        emit toolTipItemChanged();
-    }
-}
-
 QQuickWindow *Backend::groupDialog() const
 {
     return m_groupDialog;
@@ -432,13 +416,6 @@ QVariantList Backend::recentDocumentActions(const QUrl &launcherUrl, QObject *pa
     return actions;
 }
 
-void Backend::toolTipWindowChanged(QQuickWindow *window)
-{
-    Q_UNUSED(window)
-
-    updateWindowHighlight();
-}
-
 void Backend::handleRecentDocumentAction() const
 {
     const QAction *action = qobject_cast<QAction *>(sender());
@@ -605,4 +582,28 @@ void Backend::updateWindowHighlight()
     auto message = QDBusMessage::createMethodCall(highlightWindowName, highlightWindowPath, highlightWindowInterface, QStringLiteral("highlightWindows"));
     message << (m_highlightWindows ? m_windowsToHighlight : QStringList());
     QDBusConnection::sessionBus().asyncCall(message);
+    
+    if (!m_highlightWindows) {
+        if (m_panelWinId) {
+            KWindowEffects::highlightWindows(m_panelWinId, QList<WId>());
+
+            m_panelWinId = 0;
+        }
+
+        return;
+    }
+
+    if (m_taskManagerItem && m_taskManagerItem->window()) {
+        m_panelWinId = m_taskManagerItem->window()->winId();
+    } else {
+        return;
+    }
+
+    QList<WId> windows = m_windowsToHighlight;
+
+    if (!windows.isEmpty() && m_groupDialog) {
+        windows.append(m_groupDialog->winId());
+    }
+
+    KWindowEffects::highlightWindows(m_panelWinId, windows);
 }

applets/taskmanager/plugin/backend.h

@@ -42,7 +42,6 @@ class Backend : public QObject
     Q_OBJECT
 
     Q_PROPERTY(QQuickItem *taskManagerItem READ taskManagerItem WRITE setTaskManagerItem NOTIFY taskManagerItemChanged)
-    Q_PROPERTY(QQuickItem *toolTipItem READ toolTipItem WRITE setToolTipItem NOTIFY toolTipItemChanged)
     Q_PROPERTY(QQuickWindow *groupDialog READ groupDialog WRITE setGroupDialog NOTIFY groupDialogChanged)
     Q_PROPERTY(bool highlightWindows READ highlightWindows WRITE setHighlightWindows NOTIFY highlightWindowsChanged)
     Q_PROPERTY(bool canPresentWindows READ canPresentWindows NOTIFY canPresentWindowsChanged)
@@ -65,9 +64,6 @@ public:
     QQuickItem *taskManagerItem() const;
     void setTaskManagerItem(QQuickItem *item);
 
-    QQuickItem *toolTipItem() const;
-    void setToolTipItem(QQuickItem *item);
-
     QQuickWindow *groupDialog() const;
     void setGroupDialog(QQuickWindow *dialog);
 
@@ -101,7 +97,6 @@ public Q_SLOTS:
 
 Q_SIGNALS:
     void taskManagerItemChanged() const;
-    void toolTipItemChanged() const;
     void groupDialogChanged() const;
     void highlightWindowsChanged() const;
     void addLauncher(const QUrl &url) const;
@@ -110,7 +105,6 @@ Q_SIGNALS:
     void showAllPlaces();
 
 private Q_SLOTS:
-    void toolTipWindowChanged(QQuickWindow *window);
     void handleRecentDocumentAction() const;
 
 private:
@@ -119,7 +113,6 @@ private:
     QVariantList systemSettingsActions(QObject *parent) const;
 
     QQuickItem *m_taskManagerItem = nullptr;
-    QQuickItem *m_toolTipItem = nullptr;
     QQuickWindow *m_groupDialog = nullptr;
     bool m_highlightWindows;
     QStringList m_windowsToHighlight;