Timepedia has released
Chronoscope, an open source
charting and visualization library, built using GWT.
It features:
Canvas abstraction for drawing vector
graphs
Graph Style Sheets abstraction for configuring the look-and-feel of
charts
Scalable multiresolution rendering supporting up to tens of
thousands of points
Zoom and pan at interactive frame rates, from
centuries to milliseconds
Auto-ranging, auto-layout of chart axes and
ticks.
Auto-legend, and mini-chart Overview
Add
pushpin markers, domain and range markers, and overlays like Google
Maps
Bookmarkable chart state, works with Back
button
JS interopability. GWT API can be used by pure Javascript
programmers
Microformat support. Charts can be configured without
programming.
Server-side Font assistance. Render rotated
text.
Portable, Chronoscope is not tied to GWT, can be used to render from
servlets, applets, or other environments.
What is
particularly interesting is how the Chronoscope team was able to take their existing Java
source code, add
8 hours of Android exploration, and ended up with the same charting and
visualization library that works on Android using their graphics support.
This is one area that GWT truly shines. The fact that you write your code in the Java
programming language means that you can reuse it in other places where Java runs. Being able
to write one application and quickly have it run on Android and the iPhone is pretty
compelling.
