GTK Dilatory: GTK+ Response Decelerator & GUI Race Discovery Tool

General Information

This is a gtk-dilatory, a small debugging utility, which allows to experience slow GTK+ applications and delays in event processing.

How does it work?

gtk-dilatory installs a simple GTK+ 3 or GTK+ 2 module, which blocks all your GTK+ applications in a cycle:

  1. block for 2 sec
  2. allow them to run for 200 msec

What is the purpose?

This utility is intended for GTK+ library and program developers. It allows to simulate behavior of the application on a slow devices like netbooks, PDA or mobile phones.

How to use it?

Simply run your application or environment using:

gtk-dilatory application [ arguments ]

Then heavily test your application.

Typical test case:

Run quickly with your mouse, click somewhere without stopping to move your mouse. Repeat it several times. Well written application should behave correctly, just like without any dilatory. If the application gets bad position of the the click or release, your application or library needs fix.

How you can fix your application

If you want to react to mouse click or release, never use gdk_window_get_position() in the handler. Use event->x and event->y instead. Note that the fix would be a little bit more complicated, as each of them uses a different coordinate system. You need to fix coordinated origin as well.


This utility was written to discover and fix bugs like Bug 529908 – Detaching tabs is too sensitive (gtk+)



GIT repository


Copyright (C) 2009-2014 Stanislav Brabec, Novell, Inc.

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Report Bugs

Report any bugs to Stanislav Brabec