1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Supporting Multi-Touch In Non-Multi-Touch Linux Apps

Ubuntu

Published on 19 August 2010 10:02 AM EDT
Written by Mohamed Ikbel Boulabiar in Ubuntu
Comment On This Article

After the release of the Ubuntu Multi-Touch stack called UTouch and the X.Org Gesture Extension, the rising question would be the support of everyday applications, as only a few applications in Ubuntu 10.10 will properly support UTouch. Standard applications which are non-multi-touch-aware only recognize events which come from the keyboard and the mouse like key-presses and mouse clicks.

Last year when I was in the LII-ENAC Lab in Toulouse, we were discussing on how to deal with advanced input devices handling and how to develop this inside operating systems like Linux. One of the ideas is to consider the input as bricks which can be chained, modifying and enriching the information in each phase. And in the end of the chain, the input should take place in receivers, and one of the methods is to inject them in a way the application can recognize easily.

And here comes Ginn, which is a daemon filling the gap in-between by listening to gestures from the UTouch stack and injecting common key-press events inside applications according to the predefined rules.

As a beginning, two video demos have been prepared to validate the concept and show what it is possible to do with the multi-touch stack.


The first video (above) shows the control of the GNOME PDF reader called Evince, and the second one (below) shows the famous vector drawing tool Inkscape.


Ginn doesn't use DBus facilities but this support can be added later to get direct control on applications.

This background daemon fills the gap of multi-touch support and is a nice complement to the direct use of UTouch API. It can be also useful for closed-source applications running on Linux as they will be forced to accept multi-touch events even completely without detecting them.

Mohamed Ikbel Boulabiar is one of the developers behind the Ginn daemon and prepared this article for Phoronix.

Latest Linux Hardware Reviews
  1. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
  2. Sumo's Omni Gets Reloaded
  3. AMD A10-7800 & A6-7400K APUs Run Great On Linux
  4. Radeon Gallium3D Is Running Increasingly Well Against AMD's Catalyst Driver
Latest Linux Articles
  1. Intel Sandy Bridge Gets A Surprise Boost From Linux 3.17
  2. Open-Source Radeon Graphics Have Some Improvements On Linux 3.17
  3. CPUFreq Scaling Tests With AMD's Kaveri On Linux 3.16
  4. Enabling HyperZ Is Still An Easy Way For Faster RadeonSI Performance
Latest Linux News
  1. NVIDIA Releases CUDA 6.5 As A Huge Update
  2. GNOME 3.14 Beta Makes GLSL Optional, Supports Wayland Gesture/Touch Events
  3. KDE Software Compilation 4.14 Released
  4. The Many Things You Can Build With A Raspberry Pi
  5. AMD's Catalyst Linux Driver Preparing For A World Without An X Server?
  6. Khronos Publishes Its Slides About OpenGL-Next
  7. Proposed: A Tainted Performance State For The Linux Kernel
  8. Systemd 216 Piles On More Features, Aims For New User-Space VT
  9. LXQt 0.8 Is Being Released Soon
  10. Linux 3.17 Lands Memfd, A KDBUS Prerequisite
Latest Forum Discussions
  1. Remote gui not accessible in Phoronix Test Suite 5.2
  2. The dangers of Linux kernel development
  3. Dead Island for Linux (?)
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. AMD Offers Mantle For OpenGL-Next, Pushes Mantle To Workstations
  6. Next-Gen OpenGL To Be Announced Next Month
  7. OpenGL 4.5 Released With New Features
  8. Updated graphics drivers for Ubuntu 12.04 Precise LTS