Ethereal-dev: Re: [Ethereal-dev] Deactivate "Apply" button if the display filter is not valid?

Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.

Date Index Thread Index Other Months All Mailing Lists
Date Prev Date Next Thread Prev Thread Next
From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Tue, 10 Feb 2004 14:08:42 -0800

On Feb 10, 2004, at 1:05 PM, Olivier Biot wrote:


I am afraid that adding this to Ethereal today will require serious
work and probably we'll need *ugh* global variables to implement this,
since I only see filter_te_syntax_check_cb() in gtk/filter_prefs.c as
entry point. Actually, that seems to be the place where the display
filter is checked for validity and the color of the widget updated.
This is implemented in a "stateless" manner today, and I don't know if
the call-back allows for state since there's only the GtkWidget
pointer as parameter...
"OBJECT_GET_DATA()", "OBJECT_SET_DATA()", and the underlying functions they call let you attach an arbitrary amount of state to a widget; we could attach to the text entry widget a pointer to the "Apply" button widget, if there is one (if there isn't, "OBJECT_GET_DATA()" would return a null pointer, in which case there's no button whose state should be changed).