您可以使用 列出应用程序中的所有小部件QApplication::allWidgets()
。
然后,您可以列出每个小部件的所有信号(使用QObject::metaObject()
)并将它们连接到logger。
一个简单的例子:
class Spy: public QObject {
Q_OBJECT
public:
Spy();
public slots:
void log();
};
void Spy::log()
{
auto i = senderSignalIndex(); // The signal that fired this slot
auto signal = sender()->metaObject()->method(i);
qDebug() << sender() << signal.methodSignature();
}
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Widget w;
w.show();
Spy* spy = new Spy();
QMetaMethod log = spy->metaObject()->method(spy->metaObject()->indexOfSlot("log()")); // in order to use the right QObject::connect signature
for (auto widget: a.allWidgets())
{
auto metaObject = widget->metaObject();
for (int i = 0; i != metaObject->methodCount(); ++i)
{
auto method = metaObject->method(i);
if (method.methodType() != QMetaMethod::Signal) // We want to connect all the signals. We don't care about the other methods
continue;
widget->connect(widget, method, spy, log);
}
}
return a.exec();
}
如果要显示参数,则必须改进代码。
您还可以过滤对象以仅记录重要信号(例如,仅记录clicked
来自按钮的信号)