actually this one is going to be tricky since the adminUI is the one that needs to do the uploading, not the frontend.
I can't see it working where hydra.js streams the file across the iframe bridge... but who knows.
So realisticly maybe there might have to be some trick to add a invisible drop zone over top of the iframe in the right place? or don't support DND at all? I think even click to select a file to upload is something that can't be initiated from the browser and has to start with a user action so can't be done by the adminUI if the click happened in the frontend....
actually this one is going to be tricky since the adminUI is the one that needs to do the uploading, not the frontend. I can't see it working where hydra.js streams the file across the iframe bridge... but who knows.
So realisticly maybe there might have to be some trick to add a invisible drop zone over top of the iframe in the right place? or don't support DND at all? I think even click to select a file to upload is something that can't be initiated from the browser and has to start with a user action so can't be done by the adminUI if the click happened in the frontend....