置顶:
Qt::WindowFlags flags = this->windowFlags();
this->setWindowFlags(flags | Qt::CustomizeWindowHint | Qt::WindowStaysOnTopHint);
禁止其他窗口响应事件
this->setWindowModality(Qt::ApplicationModal);
Qt窗口置顶以及禁止其他窗口响应事件
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Origin blog.csdn.net/swif_N_F/article/details/78684459
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