Inconsistent errors when setting NaN range on different sliders

[qaz10102030]

Describe the bug
When calling setRange(np.nan, np.nan) on different superqt slider widgets, the errors vary inconsistently depending on the slider type. While I understand that using NaN is not valid input, I can avoid setting NaN in practice, but I thought this might be a design bug, so I wanted to report it just in case.

Some sliders crash with a RecursionError/OverflowError, some raise a ValueError, and others accept the values silently but become non-functional.

To Reproduce
Run the following code snippet, and replace the slider type on line 9 to test various sliders.

import numpy as np
from qtpy.QtCore import Qt
from qtpy.QtWidgets import QApplication
from superqt.sliders import *

app = QApplication([])

# Change this line to test other sliders
slider = QLabeledDoubleRangeSlider()

slider.setOrientation(Qt.Orientation.Horizontal)
slider.setRange(np.nan, np.nan)
slider.show()
app.exec_()

Behavior summary for different sliders

Slider	Behavior/Error Traceback
QRangeSlider()
QDoubleSlider()	Accept the values silently but become non-functional.
QDoubleRangeSlider()	Accept the values silently but become non-functional.
QLabeledSlider()
QLabeledRangeSlider()
QLabeledDoubleSlider()	Accept the values silently but become non-functional.
QLabeledDoubleRangeSlider()

Expected behavior

• Maybe a clear and early error (like ValueError) when passing NaN.
• I think there shouldn't be infinite recursion or crashes deep in enum or label handling.

Desktop (please complete the following information):

• OS: Win10
• Qt Backend: Pyside6==6.8.2.1，Superqt==0.7.3
• Python version: 3.11.9 64-bits

[Czaki]

Hm.
I'm not sure if we should have the same behavior for all types of sliders. The QRangeSlider, QLabeledSlider and QLabeledRangeSlider are int sliders (accepts and returns integers). So when passing float to them, they may silently convert it to int. So raising ValueError with conversion error seams reasonable.

>>> int(float('nan'))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: cannot convert float NaN to integer

Qt behavior of int widgets with float values

For Qt6, the int widgets do not accept float values

In [1]: from qtpy.QtWidgets import QApplication, QSpinBox

In [2]: app = QApplication([])

In [3]: spin = QSpinBox()

In [4]: spin.setMaximum(10.0)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[4], line 1
----> 1 spin.setMaximum(10.0)

TypeError: setMaximum(self, max: int): argument 1 has unexpected type 'float'

The Qt does not provide Double slider, but provides QDoubleSpinBox, and if we check its behavir:

In [1]: from qtpy.QtWidgets import QApplication, QDoubleSpinBox

In [2]: app = QApplication([])

In [3]: spin = QDoubleSpinBox()

In [4]: spin.maximum()
Out[4]: 99.99

In [5]: spin.minimum()
Out[5]: 0.0

In [6]: spin.value()
Out[6]: 0.0

In [7]: spin.setValue(10)

In [8]: spin.value()
Out[8]: 10.0

In [9]: spin.setMaximum(float('nan'))

In [10]: spin.value()
Out[10]: nan

In [11]: spin.minimum()
Out[11]: nan

In [12]: spin.maximum()
Out[12]: nan

Suggest that silence accepting nan and becoming non-functional is expected behavior to be consistent with other Qt widgets.