HiDPI DragImages seem to be impossible

[Hendrik Schreiber]

Hey...

On OS X it is possible to pass a dragImage to java.awt.dnd.DragSource#startDrag(...), which is then shown during the drag operation.

Unfortunately, it is not possible to pass HiDPI images.

Even when passing a VolatileImage, which (see other thread) apparently allows to render HiDPI components, a low quality version is used during the drag operation.

I assume this will all be addressed when the rest of the Retina/HiDPI support is put into place. However, I just wanted to make you aware of this, as I assume it's an obscure corner of the whole HiDPI stuff... It would be nice to see explicit HiDPI support here, too.

This could be done via MultiResolutionImages—or probably even nicer—by simply accepting Icons in the startDrag(...) method, as that's what one gets from the TransferHandler anyway. And Icons, being an interface, can be easily used to paint in different resolutions (if we know, what resolution to produce, different issue).

Cheers,

-hendrik