Once you have downloaded Processing it first needs to be unpacked.
tar zxvf processing-2.1-linux64.tgz
processing file then needs to be copied to
sudo mv processing /usr/bin/
The rest of the files then need to be copied to the
sudo mkdir /opt/processing
sudo cp -r processing-2.1/* /opt/processing/
The tldp website provides a great explanation of why to install to
This directory is reserved for all the software and add-on packages
that are not part of the default installation. For example,
StarOffice, Kylix, Netscape Communicator and WordPerfect packages are
normally found here. To comply with the FSSTND, all third party
applications should be installed in this directory. Any package to be
installed here must locate its static files (ie. extra fonts, clipart,
database files) must locate its static files in a separate
/opt/'package' or /opt/'provider' directory tree (similar to the way
in which Windows will install new software to its own directory tree
C:\Windows\Progam Files\"Program Name"), where 'package' is a name
that describes the software package and 'provider' is the provider's
LANANA registered name.
Although most distributions neglect to create the directories
/opt/bin, /opt/doc, /opt/include, /opt/info, /opt/lib, and /opt/man
they are reserved for local system administrator use. Packages may
provide "front-end" files intended to be placed in (by linking or
copying) these reserved directories by the system administrator, but
must function normally in the absence of these reserved directories.
Programs to be invoked by users are located in the directory
/opt/'package'/bin. If the package includes UNIX manual pages, they
are located in /opt/'package'/man and the same substructure as
/usr/share/man must be used. Package files that are variable must be
installed in /var/opt. Host-specific configuration files are installed
Interpret this as you wish, but to my understanding you do this if you want to run a self-contained package i.e. one that contains all that is needed within the download itself.
Next it needs to be linked to java
ln -s /usr/lib/jvm/java-6-sun java
And finally to create a link
sudo sed -i 's/APPDIR=`readlink -f "$0"`//'g /usr/bin/processing
sudo sed -i 's/`dirname "$APPDIR"`/\/opt\/processing/'g /usr/bin/processing
Create Unity launcher
With Processing now "installed" the launcher can now be made. The Ubuntu website provides a good tutorial of this, which is summarised below. First, create the launcher
sudo touch /usr/share/applications/processing.desktop
And then open it for editing
sudo gedit /usr/share/applications/processing.desktop
With the file now open fill it with the following information and save.
Comment=graphics and animation language
With that now saved you should be able to find Processing in the Unity Dash
Upgrading will require you to just copy over the files in /opt/processing with the new ones, though do check that the directory and file structure is the same as before.
Associate .pde files with Processing
Finally, to associate .pde files with Processing - so double-clicking a .pde launches Processing - you need create a new MIME type and associate Processing with that type.
The GNOME dev center provides an explanation of how to create a new MIME type. First, create the new MIME type
sudo touch /usr/share/mime/packages/processing.xml
Then open it for editing
sudo gedit /usr/share/mime/packages/processing.xml
Put the following data in that file and then save it
<?xml version="1.0" encoding="UTF-8"?>
<comment>Proecssing source code</comment>
Update the MIME database
sudo update-mime-database /usr/share/mime
Finally, associate the new MIME type with Processing. The default applications list is stored in a file called
sudo gedit /usr/share/applications/defaults.list
text/x-processing=processing.desktop somewhere in that file.
Now, when you double-click a .pde file it'll open the file Processing.