Make Combobox and Spinbox generic

[rdbende]

Specifying the type, a combobox or a spinbox should accept and return

combo = ComboBox[int](parent, values=[2, 4, 8])
assert isinstance(combo.value, int)

combo = ComboBox[str](parent, values=[2, 4, 8])
# TypeError: expected "str", got "int"

[Moosems]

What exactly are the args and kwargs for Tcl.call?

[rdbende]

There are no kwargs (though I plan to add them), the args are arbitrary. https://tukaan.github.io/docs/advanced/behind-the-scenes

[rdbende]

I'm no longer sure about this idea:

For callback handlers we should be able to add type hints, and Tukaan should convert the Tcl strings to Python type (at least for easier ones)

def spam(foo: int, bar: list[float]) -> None:
    assert isinstance(foo, int)
    assert isinstance(bar, list)
    assert all(isinstance(x, float) for x in bar)

Tcl.call(None, spam, "1234", "3.14 4.15")

[Moosems]

Wasn't type to string conversion a main point of Tukaan?

[rdbende]

It still is, but adding such feature would introduce significant runtime overhead, and if an internal function needs converted values, it can do it itself.