pyqt signal slot

Now let’s look at the general syntax for connections. We assume that the PyQt

modules have been imported using the from …import * syntax, and that s and

w are QObjects, normally widgets, with s usually being self.

s.connect(w, SIGNAL("signalSignature"), functionName)

s.connect(w, SIGNAL("signalSignature"), instance.methodName)

s.connect(w, SIGNAL("signalSignature"),

instance, SLOT("slotSignature"))

The signalSignature is the name of the signal and a (possibly empty) commaseparated

list of parameter type names in parentheses. If the signal is a Qt signal,

the type names must be the C++ type names, such as int and QString. C++

type names can be rather complex, with each type name possibly including one

or more of const, *, and &. When we write them as signal (or slot) signatures we

can drop any consts and &s, but must keep any *s. For example, almost every

Qt signal that passes a QString uses a parameter type of const QString&, but in

PyQt, just using QString alone is sufficient. On the other hand, the QListWidget

has a signal with the signature itemActivated(QListWidgetItem*), and we must

use this exactly as written.

from rapid pyqt tut