Multiple ticks on axis?

[pkubanek]

Hi,

I need to have multiple ticks on single axis - e.g. bigger marking every 10th tick, middle size for every 5th and even smaller for unit tick. I think JFreeChart currently does not support it.

The ideal design should be ValueAxis holding list of AxisTick classes, which can be added, make to create label etc. Then draw method will draw them in order (and method used to compute size should include them in axis size computation). That can be pretty easily make by moving MarksAndLabes method from ValueAxis to AxisTick.

I can design that, I'm just interested to see if that:
- isn't duplication of know work (e.g. nobody else is working on that)
- if proposed design looks good, or you have some other ideas
- if my patch will be considered for commitment to the source

Regards

Petr Kubanek
ISDC, Versoix

[david.gilbert]

I need to have multiple ticks on single axis - e.g. bigger marking every 10th tick, middle size for every 5th and even smaller for unit tick. I think JFreeChart currently does not support it.

Correct. This would be a nice feature to support.

- isn't duplication of know work (e.g. nobody else is working on that)

No one is yet, as far as I know. It might pay to review the patches list at SourceForge, though, someone might have submitted something that I've missed.

- if proposed design looks good, or you have some other ideas

I'd like something that fits into the existing tick unit selection mechanism, so that the axis scale adjusts automatically as the range changes.

- if my patch will be considered for commitment to the source

Yes, this is something that needs to be added to the standard API.

Are you subscribed to the jfreechart-developers mailing list? That would be the best place to discuss implementing this...here in the forum, everything gets swamped by support requests.

[pkubanek]

- isn't duplication of know work (e.g. nobody else is working on that)

No one is yet, as far as I know. It might pay to review the patches list at SourceForge, though, someone might have submitted something that I've missed.

I already checked patches, no one seems to focus on that, so I'll try to write one..let's see what then happens:)

- if proposed design looks good, or you have some other ideas

I'd like something that fits into the existing tick unit selection mechanism, so that the axis scale adjusts automatically as the range changes.

I fully understand that and will try my best to fit within standart scaling mechanism.

Petr

[david.gilbert]

I'd like something that fits into the existing tick unit selection mechanism, so that the axis scale adjusts automatically as the range changes.

I fully understand that and will try my best to fit within standart scaling mechanism.

Great. Note that I have on my to-do list to fix the problem with the current scaling mechanism where it fails for very small or very large data items, so if that aspect of the axis scaling bothers you, we can talk about my ideas for fixing that.