Qobject_cast & Sender ()

Source: Internet
Author: User
Tags emit

When an object emit a signal, it is a sender, the system will record who is currently emit out of this signal, so you can in the corresponding slot through sender () to get the current who invoke your slot, The corresponding is Qobject->d->sender.

It is possible that multiple object signal will be connected to the same signal (for example, multiple buttons may connect to the onclick () of a slot function), so it is necessary to determine which object emit this signal, Different processing according to Sender's difference

Qobject_cast & Sender ()

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