The ::input signal can be used to influence the conversion of the users input into a double value. The signal handler is expected to use gtk_entry_get_text() to retrieve the text of the entry and set @new_value to the new value.
The default conversion uses g_strtod().
%TRUE for a successful conversion, %FALSE if the input was not handled, and %GTK_INPUT_ERROR if the conversion failed.
See Implementation
The ::input signal can be used to influence the conversion of the users input into a double value. The signal handler is expected to use gtk_entry_get_text() to retrieve the text of the entry and set @new_value to the new value.
The default conversion uses g_strtod().