Emitted to convert the user's input into a double value.
The signal handler is expected to use [method@Gtk.Editable.get_text] to retrieve the text of the spinbutton and set new_value to the new value.
The default conversion uses [func@GLib.strtod].
See [signal@Gtk.SpinButton:AdwSpinRow:input].
| new_value |
return location for the new value |
|
`TRUE` for a successful conversion, `FALSE` if the input was not handled, and [const@Gtk.INPUT_ERROR] if the conversion failed. |