fix: QObjectPrivate::threadData type change when qt >=5.15

iveswang

2024-06-12 7610c3a509b8a04d25e72a6282d9c8ea8ecbd27f

 src/widgets/widgetwindowagent.h

@@ -43,8 +43,8 @@
        void setHitTestVisible(const QWidget *w, bool visible = true);

    Q_SIGNALS:
        void titleBarChanged(const QWidget *w);
        void systemButtonChanged(SystemButton button, const QWidget *w);
        void titleBarChanged(QWidget *w);
        void systemButtonChanged(SystemButton button, QWidget *w);

    protected:
        WidgetWindowAgent(WidgetWindowAgentPrivate &d, QObject *parent = nullptr);