I'm using Swing on OS X, and most controls have some visual padding that I want to be ignored during layout. For instance, JButtons have 3,3,3,3 extra insets for the focus ring. I'd like to specify the visual padding for components, but I cannot find a way to do so. I see that SwingComponentWrapper.getVisualPadding() always returns null except for when the component is Windows JTabbedPanes. There doesn't seem to be a way to create a custom ComponentWrapper class, nor a way to set the visual padding on a per-Component nor per-Class basis.

What's the best way to get MiGLayout to ignore the 3-pixel visual padding on OS X JButtons?

Hello,

Yeah, that needs to be done in the source. So either I have to do it our you build your own version. If you change the code for the better on OS X, please send it to me and I'll integrate it into the next release.

Note that I'm not entirely sure how the padding is applied. It should be applied already in the preffered size stage but unfortunately I think it's in the final padding stage which will make the components have the right gap, but be too large. I don't remember and I don't have the code at hand right now. The code is in the class PlatformDefaults I think though.

Cheers,
Mikael

I've added support to specify the visual padding in three different ways:
1) As a UIDefault property. This allows developers to specify the default visual padding for all components of a specific type. For example, PlatformDefaults now has the following line:

2) As a client property on a JComponent. The value may be an int[] or an Insets instance. For example,
3) As a component constraint, using the same format as "pad" - e.g. "visualpadding 3 3 3 3" or "vp 3 3 3 3"

That was the easy part. Now I'm trying to figure out how to adjust the layout. Do you have any suggestions on where to take the visual padding into account?
I'm thinking about putting it into Grid.CompWrap.getSize, but that method and class have no current way of knowing if the layout constraints included "novisualpadding" to toggle the behavior.
Do you have any suggestions?

Thanks,
-Tex

I now have it working.
It subtracts the visual padding in Grid.CompWrap.getSize.
But it adds the visual padding in Grid.CompWrap.transferBounds.

I haven't added all of the padding values for all of the component types into PlatformDefaults yet.

How would like for me to send you the changes?

-Tex

Good job!

Either as annotated snippets in a text file or a patch. Whatever is most practical depending on the number of changes.

Send it to miglayout at miginfocom dot com.

Thanks,
Mikael