How to develop GWT widget?

Question

I want to develop my GWT Widget. This widget draws Gantt chart and has drag - drop property. It will be simple form of Deskera

Where can I start to develop this widget? Any advice?

Answer 1

Take a look at gChart and maybe look at the source too. Good example of a custom widget.

Answer 2

This tutorial covers how to create a GWT module:

http://developerlife.com/tutorials/?p=229

Answer 3

You can develop the chart purely in java using google web toolkit. Or if you have any exsting javascript for your chart you can use this with the HTML control from GWT.