The 'value-changed' signal is emitted when the current value that represent the object changes.
value is the numerical representation of this new value.
text is the human readable text alternative of
, and can be NULL if it is not available. Note that if there is a textual description associated with the new numeric value, that
description should be included regardless of whether or not it has also changed.
Example: a password meter whose value changes as the user types their new password. Appropiate value text would be "weak", "acceptable" and "strong".
the new value in a numerical form.
human readable text alternative (also called description) of this object. NULL if not available.