Programming dojox.chart (3) - Prototype

The prototype of dojox.chart is supposed to be done two weeks ago, I am far behind the schedule due to the underestimation of the design complexity. It is really a torture to take too many pieces into account into the early design. Anyway, I am going to release a very rough prototype for the community review.

First, the screenshot, dojox.chart.Column:

and dojox.chart.Bar:

Using dojox.chart.Chart, it is like a breeze to implement Column and Bar. I am lazy, I would like to reuse as much as possible. Some highlights:

• No need to calculate the range of the data, the chart would take care and figure it out the resolution to maximize the resolution
• Very flexible architecture to make it easy to implement other kinds of chart. Well, maybe the constraint is too loose, I may refactor it later for error-proof.

And we also face some challenges, for example, current layout is hard-coded, a better approach is either to use a theme which covers the color scheme as well, or some better ways to describe the position and dimension of the plotArea, legend etc. using JSON, XML or whatever.