Dropdown menu

[Kintaro]

Is there a need for a dropdown menu? I came across a few instances where it might come in handy and would love to give a shot at it.

[jtdaugherty]

Please feel free!

As you tackle this, here are some things to be aware of. It seems to me that since a drop-down menu would want to pop up a floating layer with the list contents on top of the underlying UI, and since the only way to do that is to affect with the top-level [Widget] produced by the application's drawing function, an approach to this might need to touch both the application state (where you might embed the drop-down open/closed state) and the draw function (where you'd return an extra layer when the list is open). A trick to determine the location of the drop-down for positioning the layer would be to use a cursor position, but that might be awkward.

[jtdaugherty]

Since this isn't something I intend to do myself, I'm going to close this so we don't have any lingering tickets with unclear outcomes - but if you tackle this, I'll be happy to discuss it on the pull request when the time comes! Thank you!