Add a routine to be used to put up alert boxes for invalid display

filter expressions; use that in a number of places, so we use the same
alert box.  (More work is needed to figure out the right way to handle
some other "dfilter_compile()" failures.)

Use the error message from the display filter as the primary error, as
that's the message that tells you what the underlying problem is.  (The
GNOME HIG says "In most situations the user should only need the primary
text to make a quick decision", so the primary text should tell you
what's wrong with the filter, not just that it's invalid.  If there are
messages from the display filter code that don't give enough
information, or are a bit cryptic, such as "Unexpected end of filter
string," those should be fixed in the display filter code.)

Improve the error used if an empty filter is used for "find frame".

svn path=/trunk/; revision=10025

1 files changed, 44 insertions, 0 deletions

diff --git a/alert_box.h b/alert_box.h
new file mode 100644
index 0000000000..5c35d1896a
--- /dev/null
+++ b/alert_box.h
@@ -0,0 +1,44 @@
+/* alert_box.h
+ * Routines to put up various "standard" alert boxes used in multiple
+ * places
+ *
+ * $Id: alert_box.h,v 1.1 2004/02/11 00:55:27 guy Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef __ALERT_BOX_H__
+#define __ALERT_BOX_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/*
+ * Alert box for an invalid display filter expression.
+ * Assumes "dfilter_error_msg" has been set by "dfilter_compile()" to the
+ * error message for the filter.
+ */
+extern void bad_dfilter_alert_box(const char *dftext);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __ALERT_BOX_H__ */