Drag & Drop between Operating System and Flutter App

[Tom Verbeek]

Hey,

we are writing a Flutter based desktop client for our Managed File Transfer solution TeamBeam.

The version for macOS is fairly good already and will soon be published as public beta.

One thing our customers are used to is dragging files and folders onto the TeamBeam client. We would like to offer that with the new Flutter based client as well.

Is there already work in progress to support Drag & Drop on desktop platforms?

[Tom Verbeek]

OK, I just found out, there is already an issue for it: https://github.com/flutter/flutter/issues/30719

A lot of people seems to be interested. Is there any way to speed up development progress?

[Chris Sells]

There certainly is, Tom. PRs work great for this!

On Fri, Jan 3, 2020 at 6:35 AM Tom Verbeek <techn...@gmail.com> wrote:

OK, I just found out, there is already an issue for it: https://github.com/flutter/flutter/issues/30719

A lot of people seems to be interested. Is there any way to speed up development progress?

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[Stuart Morgan]

In this case I would strongly recommend starting with a design document, since there are lots of non-trivial questions here. For instance, what does the pasteboard interoperability for complex types look like exactly (see the issue linked from my original comment in the drag-and-drop issue)? How does drag source/drop target declaration for cross-boundary dragging work, and how does it interact with existing intra-Flutter drag and drop? How do the engine and the embedding coordinate on location updates for sources and targets such that the native embedding implementations can correctly advertise those boundaries to the OS? And for the latter, has it been sanity checked against multiple embeddings (Windows, macOS, web, Linux) to make sure it's not over-fitting to one OS's API design?

-Stuart

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