signal callback delegate or function to connect
int callback(out double newValue, gtk.spin_button.SpinButton spinButton)
newValue return location for the new value (optional)
spinButton the instance the signal is connected to (optional)
Returns true for a successful conversion, false if the input was not handled, and gtk.types.INPUT_ERROR if the conversion failed.
Yes.After to execute callback after default handler, No.After to execute before (default)
Signal ID
Connect to Input signal.
Emitted to convert the users input into a double value.
The signal handler is expected to use gtk.editable.Editable.getText to retrieve the text of the spinbutton and set new_value to the new value.
The default conversion uses glib.global.strtod.