Prefer invokeMethod on a function pointer

Rather than a char* that needs lookup at runtime.

src/activities.cpp

@@ -147,7 +147,11 @@ bool Activities::stop(const QString &id)
     }
 
     // ugly hack to avoid dbus deadlocks
-    QMetaObject::invokeMethod(this, "reallyStop", Qt::QueuedConnection, Q_ARG(QString, id));
+    QMetaObject::invokeMethod(
+        this, [this, id] {
+            reallyStop(id);
+        },
+        Qt::QueuedConnection);
     // then lie and assume it worked.
     return true;
 }

src/backends/libinput/connection.cpp

@@ -114,7 +114,7 @@ Connection::~Connection() = default;
 
 void Connection::setup()
 {
-    QMetaObject::invokeMethod(this, "doSetup", Qt::QueuedConnection);
+    QMetaObject::invokeMethod(this, &Connection::doSetup, Qt::QueuedConnection);
 }
 
 void Connection::doSetup()

src/backends/libinput/connection.h

@@ -66,7 +66,6 @@ Q_SIGNALS:
     void eventsRead();
 
 private Q_SLOTS:
-    void doSetup();
     void slotKGlobalSettingsNotifyChange(int type, int arg);
 
 private:
@@ -74,6 +73,7 @@ private:
     void handleEvent();
     void applyDeviceConfig(Device *device);
     void applyScreenToDevice(Device *device);
+    void doSetup();
     std::unique_ptr<QSocketNotifier> m_notifier;
     QRecursiveMutex m_mutex;
     std::deque<std::unique_ptr<Event>> m_eventQueue;

src/decorations/decoratedclient.cpp

@@ -211,7 +211,12 @@ void DecoratedClientImpl::showApplicationMenu(int actionId)
 
 void DecoratedClientImpl::requestToggleMaximization(Qt::MouseButtons buttons)
 {
-    QMetaObject::invokeMethod(this, "delayedRequestToggleMaximization", Qt::QueuedConnection, Q_ARG(Options::WindowOperation, options->operationMaxButtonClick(buttons)));
+    auto operation = options->operationMaxButtonClick(buttons);
+    QMetaObject::invokeMethod(
+        this, [this, operation] {
+            delayedRequestToggleMaximization(operation);
+        },
+        Qt::QueuedConnection);
 }
 
 void DecoratedClientImpl::delayedRequestToggleMaximization(Options::WindowOperation operation)

src/globalshortcuts.cpp

@@ -86,7 +86,7 @@ QAction *GlobalShortcut::action() const
 
 void GlobalShortcut::invoke() const
 {
-    QMetaObject::invokeMethod(m_action, "trigger", Qt::QueuedConnection);
+    QMetaObject::invokeMethod(m_action, &QAction::trigger, Qt::QueuedConnection);
 }
 
 const Shortcut &GlobalShortcut::shortcut() const

src/internalwindow.cpp

@@ -120,11 +120,7 @@ bool InternalWindow::eventFilter(QObject *watched, QEvent *event)
             // Some dialog e.g. Plasma::Dialog may update shadow in the middle of rendering.
             // The opengl context changed by updateShadow may break the QML Window rendering
             // and cause crash.
-            QMetaObject::invokeMethod(
-                this, [this]() {
-                    updateShadow();
-                },
-                Qt::QueuedConnection);
+            QMetaObject::invokeMethod(this, &InternalWindow::updateShadow, Qt::QueuedConnection);
         }
         if (pe->propertyName() == "kwin_windowType") {
             m_windowType = m_handle->property("kwin_windowType").value<NET::WindowType>();

src/kcmkwin/kwinscreenedges/kwinscreenedge.cpp

@@ -18,7 +18,7 @@ namespace KWin
 KWinScreenEdge::KWinScreenEdge(QWidget *parent)
     : QWidget(parent)
 {
-    QMetaObject::invokeMethod(this, "createConnection", Qt::QueuedConnection);
+    QMetaObject::invokeMethod(this, &KWinScreenEdge::createConnection, Qt::QueuedConnection);
 }
 
 KWinScreenEdge::~KWinScreenEdge()

src/workspace.cpp

@@ -270,7 +270,7 @@ void Workspace::init()
     }
 
     // broadcast that Workspace is ready, but first process all events.
-    QMetaObject::invokeMethod(this, "workspaceInitialized", Qt::QueuedConnection);
+    QMetaObject::invokeMethod(this, &Workspace::workspaceInitialized, Qt::QueuedConnection);
 
     // TODO: ungrabXServer()