QToggleButton animation de-synced when sate changed inside QSignalBlocker

[carlosmariorr]

Describe the bug
The QToggleSwitch class won't update the GUI if used under a QSignalBlocker.

This is happening because the animation is handled as an event connection in:

class QToggleSwitch(QtW.QAbstractButton):
    
    ....

    def __init__(  # type: ignore [misc]  # overload
        self, text: str | None = None, parent: QtW.QWidget | None = None
    ) -> None:
        
        ....

        self.toggled.connect(self._animate_handle)

To Reproduce
Steps to reproduce the behavior:

1. Create a QToggleSwitch.
2. Update the state inside a QSignalBlocker.
3. The button will glitch, properly changing the color but not the GUI handle.

Expected behavior
If the button state is updated inside a QSignalBlocker, the GUI should be updated alongside the state.

Screenshots
Button state Checked = True but GUI handle OFF (WRONG state)

Button state Checked = False but GUI handle ON (WRONG state)

Button state Checked = False GUI handle OFF (This is CORRECT)

Desktop:

• Windows 11 (26200.8328)
• PyQt6 (6.10.2)
• Python 3.13

[Czaki]

@carlosmariorr Are you sure that your screenshot's description is correct?

[carlosmariorr]

Yes @Czaki , when the button checked state is False, the color is gray and handle should be on the left. I added a correct screenshot for comparison.

When the button checked state is True, the color is blue and the handle should be on the right.

This is how it looks like if I toggle in napari-metadata with the QSignalBlocker: