QObject::connect:没有这样的信号mouseReleaseEvent

Question

我正在尝试：

  connect(myButton, SIGNAL(mouseReleaseEvent(QMouseEvent*)),
    this, SLOT(ShowContextMenu(QMouseEvent*)));

但收到错误消息：

QObject::connect: No such signal QToolButton::mouseReleaseEvent(QMouseEvent*)

qt 5.4-我做错了什么？

Answer 1

假设myButton属于QPushButton类，则可以使用released（）信号：

connect(myButton, SIGNAL(released()),
    this, SLOT(ShowContextMenu()));

假设可以在没有参数的情况下调用slot"ShowContextMenu"。另请参阅QT文档。