vaadin / vaadin/framework

When receiving a drop, I want to add server side drop criteria, because I have complex calculations on server side for accepting the drop

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enhancement
Dominant language
Java
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Description

Will require UX testing on what to show to the user while client side is waiting for the server side acceptance criteria.

The server side call might need to be delayed until the user has "stopped" at some drop target.
One option would be to show a "maybe" drop hint for the user before the server side criteria has been resolved.

The API itself should be really simple: just provide the data from the drag/dragenter event and return whether the drop is acceptable.

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First steps

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  3. Fork the repository and make your change on a branch.
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Research direction

No files, tests, or entry points are named. Start by reviewing the existing drag, dragenter, and drop handling and how drop-target feedback is presented. Define the UX for waiting or showing a “maybe” hint, then verify that the server-side API can receive drag-event data and return an acceptance decision.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
backend, frontend
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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