How Can I Pass Extra Arguments to PyQt Slot Connections?

Extra Arguments in Slot Connections

Question:

Is it possible to pass additional variables through slots to modify the behavior of the connected function?

Answer:

Yes, there are two methods to achieve this:

Using Lambda Functions

Use a lambda function inside the connect method to pass extra arguments to the slot function.

self.buttonGroup.buttonClicked['int'].connect(lambda i: self.input(i, "text"))

@pyqtSlot(int)
def input(self, button_or_id, DiffP):
    ...

In this example, the extra argument "text" is passed to the input slot function using the lambda function.

Using functools.partial

Use the functools.partial function to bind extra arguments to the slot function before making the connection.

from functools import partial

...

self.buttonGroup.buttonClicked['int'].connect(partial(self.input, "text"))

@pyqtSlot(int)
def input(self, DiffP, button_or_id):
    ...

In this example, the extra argument "text" is bound to the input slot function using the partial function.

Both methods allow you to pass additional information to slot functions, enabling greater flexibility and customization in your Qt applications.

The above is the detailed content of How Can I Pass Extra Arguments to PyQt Slot Connections?. For more information, please follow other related articles on the PHP Chinese website!