More input event types

[fscherf]

This idea or feature request is originally from @mwx23 (#169)

Currently Lona has the input event types CLICK and CHANGE.
There are some ideas for new types

• FOCUS and BLUR
  • These two are very simple to implement
• HOVER
  • Hovering would have to be implemented with a timeout like the oninput events. The event would fire after the cursor remained on the node for a specific amount of time to avoid flooding the server with events, when the cursor gets moved over the page
• Keyboard events
  • An API for keyboard events could look like this: Div(events=[SHIFT+ENTER])
• Drag and Drop
  • I have no idea yet how to implement that and if it is a good idea. Maybe it makes more sense to create a Lona widget around a good drag and drop Javascript library

@maratori, @korantu, @laundmo, @TheMutt

[grigolet]

I really like the idea of all these events added to lona! Regarding drag and drop I don't have any direct experience with drag and drop libraries but looking around I found interactjs that has also for resizing events and multi touch gestures

[fscherf]

Interactjs looks very promising. Maybe the solution ist to just start lona-interactjs to add drag and drop etc

[grigolet]

I agree with you that given the high flexibility of Lona it could be easier to integrate interactsjs or any equivalent frontend library it as a separate package

[laundmo]

Keyboard events would be splendid, though i worry most usecases would have too many issues with latency.

[fscherf]

By keyboard events i meant something like shortcuts on an element like STRG + a or ARROW_UP to focus another element. Nothing for typing or fast movement really, but for short operations.

[fscherf]

FOCUS and BLUR are implemented now, available in the master branch, and will come with Lona 1.9.

@mwx23