mplh5canvas 0.7

Features

• Pure Python

• Uses mod_pywebsocket to provide multi-browser support through multiple websocket standards

• Requires up-to-date web browser with Canvas and WebSocket support (since the start of 2013 the latest versions of all major browsers should work out of the box - see Wiki page for more details)

• Designed with animation and interactivity in mind (resizable, zoomable, clickable regions, etc)

• Simple plots (e.g. a 2048-point line plot) can be animated at around 60 frames per second

• Allows proper remote access to plots

• Allows multiple concurrent access to plots

• Thumbnail window allows quick cycling between plots on a single page

Screenshot

Requirements

We have tried to keep this module as free of dependencies as possible in order to open up the widest possible installation base. We do however depend on the excellent pywebsocket code for handling our browser communications. This allows us to better track the WebSocket standard as it continues to evolve.

The current base system requirements prior to installation are:

• Python 2.5, 2.6 or 2.7 (2.4 should also be OK, but has not been tested)

• matplotlib 0.99.1.1 or newer (will be automatically installed if you are going the easy_install mplh5canvas route)

• pywebsocket 0.6 or newer (will be automatically installed if you are going the easy_install mplh5canvas route)

If you want to make use of easy_install as suggested in the instructions below, you should install setuptools. Alternatively you can use pip instead of easy_install by installing the pip Python package.

The web browser you use to display the plots must support Canvas and WebSocket (see http://caniuse.com/#feat=websockets for a summary of current WebSocket support). The status quo for the major browsers in July 2013 is:

• Chrome 9 and later works out of the box and is the target browser (both desktop and mobile versions)

• Safari 5 and later works out of the box (both Mac OS X and iOS versions)

• Firefox 4 works after unblocking WebSocket support:

  • Browse to the about:config preferences page and promise to be careful

  • Type websocket in the filter to find the right option

  • Double-click on network.websocket.override-security-block to set it to true

• Firefox 5 to 10 is not supported due to a custom MozWebSocket class

• Firefox 11 and later works out of the box

• Opera 11 to 12.02 works after unblocking WebSocket support:

  • Browse to the Preference Editor at the opera:config page

  • Type websocket in the “Quick find” search field to zoom in on the right option (“Enable WebSockets” under User Prefs)

  • Check the tickbox and click on the Save button

• Opera 12.10 and later works out of the box

• Internet Explorer 10 and later should work out of the box but is untested

• Opera Mini and Android Browser have no WebSocket support yet and are therefore not supported

easy_install netifaces

easy_install mod_pywebsocket

Installation

Since this package is available on PyPI the simplest way to install it is to do:

easy_install mplh5canvas

Alternatively, install mod_pywebsocket yourself, download the latest mplh5canvas tarball (or check out the source code) from the Google Code page and do:

python setup.py install

It is assumed that you have the proper permissions to install Python packages on your system (if not, you can make use of virtualenv instead).

Testing

We provide a number of example scripts for initial testing. Surprisingly these are found in the examples directory of the source code.

The script names are self-explanatory. The URL of the management server should be printed out by the script, and if a web browser is installed and available a new tab should be opened in your browser. If not, then just copy and paste the management URL into a browser window.

cd tests
python test.py -d <matplotlib source tree>/lib/mpl_examples/pylab_examples

python rec.py