Having Small Color Ball Along Graph Line While Mouse Move

[yccheok]

By using JFreeChart, is it possible that to have a small color ball effect, when my mouse move over the graph line :

http://www.google.com/finance?q=MSFT (See the blue small ball, when you move the mouse over the graph line)

If yes, is there any demo or hints to get start implement this feature?

Thanks!

[remiohead]

You'll have to use a MouseMotionListener on the chart panel and map the x co-ordinate to a category value. Its then just a matter of painting the marker on the chart at the appropriate position for the data point value. Don't think it would be very difficult.

[david.gilbert]

I did this for a client using the Overlay feature. I don't have any code that I can share right now.

[yccheok]

Dear david.gilbert,

I follow up your blog and I saw something exciting :

http://www.jroller.com/dgilbert/?page=2 (JFreeChart and JXLayer)

I want to say WOW. and I would like to apply the same technique (JXLayer) for CrossHair implementation.

I thought I need CrossHairUI, which its functionality will be similar to MagnifierUI.

Am I in the right direction?

Thanks!

[yccheok]

My plan to work on this feature is as follow :

[yccheok]

I was able to implement the feature "having small color ball along graph line while mouse move"

We are using binary search to located the nearest point.

Take a look if you are interested ;

http://jstock.cvs.sourceforge.net/viewv ... iew=markup
http://jstock.cvs.sourceforge.net/viewv ... iew=markup

[comir]

Can you share code here to make chart like above . . .