Adapt to QWidget::enterEvent changes in Qt6

kcms/touchpad/kcm/xlib/testarea.cpp

@@ -25,7 +25,11 @@ TestArea::TestArea(QWidget *parent)
     m_ui.scrollAreaWidgetContents->setStyleSheet(stylesheet.arg(wallpaper));
 }
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 void TestArea::enterEvent(QEvent *e)
+#else
+void TestArea::enterEvent(QEnterEvent *e)
+#endif
 {
     Q_EMIT enter();
     QWidget::enterEvent(e);

kcms/touchpad/kcm/xlib/testarea.h

@@ -20,7 +20,11 @@ Q_SIGNALS:
     void leave();
 
 protected:
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     void enterEvent(QEvent *) override;
+#else
+    void enterEvent(QEnterEvent *) override;
+#endif
     void leaveEvent(QEvent *) override;
 
 private: