change size of colorbar in viz module

[skoudoro]

From @samuelstjean on February 15, 2016 11:0

Is there an option to do that? I looked at the docstring of some actors from this example http://nipy.org/dipy/examples_built/viz_bundles.html#example-viz-bundles and there does not seem to be a way to change the size of the bar/numbers. Looks a bit too big in comparison with the bundle, and fiddling with the window size change the number size but not the bar size itself.

Copied from original issue: dipy/dipy#923

[skoudoro]

From @arokem on February 15, 2016 16:9

This seems like a question better discussed on the mailing list.

[skoudoro]

From @samuelstjean on February 15, 2016 16:12

This also seems like a missing feature/needs better documentation. Maybe it
is even impossible, could not find out.

2016-02-15 17:09 GMT+01:00 Ariel Rokem notifications@github.com:

This seems like a question better discussed on the mailing list.

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Reply to this email directly or view it on GitHub
dipy/dipy#923 (comment).

[skoudoro]

From @arokem on February 15, 2016 16:14

The point is that if an answer is provided here, and we close this issue, it will be hard for a casual user to ever find this answer again.

[skoudoro]

From @samuelstjean on February 15, 2016 16:20

I rather saw this as

1. here is how to do it
   1.a. We should edit the doc example so it's easier to find for random people.

or

1. Oh right, that could be useful to have.

[skoudoro]

From @samuelstjean on February 23, 2016 13:9

It can be done by accessing directly the vtk properties of the bar actor, albeit not super user friendly.

Example

bar = actor.scalar_bar(lut_cmap)
# bar.SetHeight(0.5)
# bar.SetWidth(0.15)

Some position properties also can do that according to the vtk doc.

[dmreagan]

actor.scalar_bar could use a PR to add more customization parameters. We'll want to be careful not to complicate it too much, but we can add a few options like:

• title
• horizontal or vertical
• font size
• bar size

This blog post describes some recent improvements to the ParaView color legends. I hope some of those are in VTK so that we can take advantage of them.

[Nibba2018]

Should I add a PR for horizontal/vertical, font-size and bar-size for actor.scalar_bar?

[skoudoro]

Hi @Nibba2018,

Yes, you can go ahead, just be careful on the design.

[hnumair]

Are you still working on this @Nibba2018 ?

[skoudoro]

I think you can go ahead @hnumair and fix this issue

@Nibba2018 , If you want to work on something else, you can update RangeSlider like you did for DoubleLineSlider

[Nibba2018]

@hnumair No you can go ahead with it.

@skoudoro Ok 👍