Supporting Drag and drop in offscreen rendering

[lologadgeto]

I have started to integrate CEF into my 3d engine using the offscreen rendering functionality and I would like to integrate drag and drop as shown in http://html5demos.com/drag
As of now I don't manage to make it work and I have noticed that CEFclient offscreen rendering sample does not support it also.

Is there any way to support it or is it a new functionality?

Thanks for your help!

[magreenblatt]

HTML5 drag and drop is not currently supported in off-screen rendering mode because CEF does not have a window to act as a drag source or drop target. It would be possible to expose the renderer callbacks but you would need to implement drag sources and drop targets yourself as appropriate for your application.

[ataranto]

What kind of window are we talking about? It looks like if i disable the check, drags are intiiated correctly but drop targets don't exist. Can you elaborate a bit on what it would take to add this?

Created an issue to track:
http://code.google.com/p/chromiumembedd ... ail?id=554

[magreenblatt]

Operating systems provide interfaces for drag&drop integration. For example, IDropSource on Windows and NSDraggingSource on Mac. These calls need to be handled by a window or view that forwards to the WebView drag methods.

[ataranto]

I will spend some time investigating if it is feasible to use the hwnd passed to CefWindowInfo::SetAsOffscreen() as the window for drag events.

[ataranto]

I tried instantiating WebDragSource() with the hwnd passsed to CefWindowInfo::SetAsOffscreen() but drags still don't initiate successfully. Not sure why, I may spend more time investing tomorrow.

[rndbit]

does cef1 support drag&drop in off-screen rendering mode?

im in exactly same situation as thread author, want to be sure if its worth downgrading.

[magreenblatt]

does cef1 support drag&drop in off-screen rendering mode?

No

[atai]

One more question about drad&drop:

Does CEF3 support drag&drop in off-screen rendering mode?

[magreenblatt]

One more question about drad&drop:

Does CEF3 support drag&drop in off-screen rendering mode?

No.