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Moderators: martimiz, Sean, biapar, Willr, Ingo, simon_w

Reporting Emprise JavaScript Charts v1.0 Release


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8 Posts   2142 Views

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Sigurd

Forum Moderator, 628 Posts

20 June 2007 at 11:14am

A cool reporting engine that Tim noticed a few months ago has been released. It might be useful on with Quin's Reporting project?
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Emprise Corporation is pleased to announce the immediate availability of
Emprise JavaScript Charts v1.0.

Emprise JavaScript Charts (EJSChart) is a pure JavaScript charting library
which utilizes the <canvas> element and VML to provide cross-browser
compatible, interactive Web 2.0 charts.

EJSChart takes web charting to a new level by incorporating such features as
automatic axis scaling, zooming, scrolling, smart ticks and Ajax-driven data
loading. With its fully documented API, support for multiple chart types and
data retrieval methods, EJSChart is extremely quick and easy to implement in
any web site or web application that requires graphical display of data.

Major features included:

* Interactivity: Zooming, Scrolling, Hints, Mouse Tracking, Mouse
Events, Key Tracking Crosshairs.
* EJSChart will calculate and scale automatically to fit whatever
data it is presented with.
* Auto Zooming, Scrolling: Too much data and not enough screen real
estate? Show it all. Let your end users zoom in on the pieces
they're most interested in. Axis locking for single axis zoom,
scrolling and automatic axis scaling are all included.
* Multiple Chart Types: Line, Area, Scatter, Pie, Bar, Function and
Trend series are just the beginning. New custom series types are
just a few lines of JavaScript code away.
* Ajax-Driven Data: EJSChart supports XML-formatted data and loads
data on the fly. New series can be added and data updated in
real time without page reloads.
* Compatible: Built with compatibility in mind and tested on all
major browsers, you can be assured your charts will function
consistently for the broadest range of end users.
* Plugin Free: 100% Pure JavaScript Charting Solution. No more
worries of incompatible plugin versions or confusing security
warnings. EJSChart is pure JavaScript and requires no client
installation.
* Fully documented API and many source code and chart examples
available.

For additional information or to download a trial version, please visit
http://www.ejschart.com/

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Sam

Administrator, 685 Posts

20 June 2007 at 11:28am

It's not open source, so this can't really be the default graphing library.

Perhaps it could be utilised as an option enhancement for people who install it, if the benefits justify the development effort.

Quin - there is a free personal license, if you think that this is worthwhile, we'd be keen to see what you come up with, but we need an alternative open-source library to bundle with SilverStripe by default.

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qhoxie

Google Summer of Code Hacker, 39 Posts

20 June 2007 at 2:52pm

it would be very useful to my work, and i was very impressed with it back when i first saw the charts

my concerns would be the following:
free version is somewhat limiting: no trends or scatters, 1 chart per page, 2 items per chart
their watermark is on it
licensing and redistribution?

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Willr

Forum Moderator, 5513 Posts

20 June 2007 at 4:22pm

Sorry to sort of jump in but Im working on a webapp at the moment and we are planning on using Plotr - http://www.solutoire.com/plotr .Its a lightweight charting framework (12kb) and It’s released under the BSD license (its pretty young at the moment). Its built on prototype js - which is very handy.! Dont know if you guys have come across it or anything but it looks damn handy.

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qhoxie

Google Summer of Code Hacker, 39 Posts

20 June 2007 at 7:57pm

plotr is nice, its what i used for my browser poll

not nearly as robust as the EJS charts, but it will suffice

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Sam

Administrator, 685 Posts

21 June 2007 at 10:32pm

Yeah, I'm sorry but even if it's free I don't think we can have Emprise charts polluting the licensing of the core software.

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Tim

Core Development Team, 201 Posts

22 June 2007 at 10:28am

What would be nice is if we had a a bit of an abstraction layer for charting within SilverStripe, so that other solutions can be used if required be the developers.

I know a number of our commercial clients would be happy to pay for something such as Emprise JavaScript Charts, (and the ability to "plugin" commercial modules like this was a conscious decision we made when choosing the BSD license over the GPL)

However, as Sam has said, because the reporting engine is going to be part of the core, we really can only accept code which is licensed under the LGPL / BSD or MIT licenses. Alternative solutions such as Emprise JavaScript Charts could be included as a separate module.

Note: I've got no idea in about the feasibility of a charting abstraction layer, so this may not be at all feasible :P

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Sam

Administrator, 685 Posts

23 June 2007 at 1:46pm

I agree that we should simplify the process of replacing on chart library with another where appropriate. But I caution against going too far down the 'abstraction layer' path - you can easily wind up having a hugely more complex system.

In particular, I would think that any given report would quite likely need to be designed/modified to make the best use of the chart library that it was designed for.

We should aim for something simple - wrapper classes for each library that operated in a similar way, where appropriate.