Fix #122: Add FAN expansion mode

[kiewietn]

First time contributor checklist

• [x] I have read how to contribute to this project
• [x] I have read the code of conduct to this project

Contributor checklist

• [x] I am using the provided codeStyleConfig.xml
• [x] I have tested my contribution on these devices:

• Huawei Y3 CAG-L02, Android 8.1.0
• Samsung Galaxy S5 SM-G900H, Android 6.0.1
• Virtual device Nexus 5, Android 8.1.0

• [x] My contribution is fully baked and ready to be merged as is
• [x] I ensure that all the open issues my contribution fixes are mentioned in the commit message of my first commit using the Fixes #1234 syntax

---

Description

Add an expansion mode, where the items are arranged radially around the main FAB. Items with label text set, will have the labels display below the mini fab item. The radius length of the expansion mode can be changed from the xml layout file using the layout_constraintCircleRadius.

[kiewietn]

Not really sure how to handle the overlapping text. My thought was that clients will use shorter length labels, less action items or increase the expansion radius when text overlaps.

[kiewietn]

@leinardi, thanks for the comment.

To mitigate risk of overlapping labels, the maximum number of characters displayed on the label could be limited when using the FAN expansion mode.

The label length restrictions applied to the other expansion modes remain unchanged.

Please let me know if this is satisfactory.

[leinardi]

Hi @kiewietn, sorry for the late reply, busy week at work.

This is definitely an improvement but I'm still afraid that people will not understand this limitation and will keep opening issues complaining for the cut labels.

I would be fine to release this feature as experimental but I'm not sure how to do it with Java. With Kotlin it would be possible to use the Experimental API marker.

I also notice a bug with the action items alignment:

It seems that, on your fork, they are not aligned to the main FAB anymore:

Upstream master doesn't have the issue:

[kiewietn]

Thanks for coming back to me @leinardi . I have fixed the alignment issue and added the limit to the label lengths.

[stale[bot]]

This issue has been automatically marked as stale because it has not had activity in the last 60 days.

[stale[bot]]

This issue has been automatically marked as stale because it has not had activity in the last 60 days.