GWT DnD widget?

[dhoffer]

Is it possible to DnD from the desktop into a GWT application similar
to how users can attach attachments in GMail? Or do I have to use a
manual file upload approach?

[Thomas Broyer]

If the browser can do it, then you can use it with GWT; possibly throwing a bit of JSNI (in this case, you'd need it)

See:

• http://www.w3.org/TR/html5/dnd.html for the DnD part
  
• http://www.w3.org/TR/FileAPI/ to access the file
  
• http://www.w3.org/TR/XMLHttpRequest2/#the-send-method to send the file to the server
  
• http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/event/dom/client/DropEvent.html et al. for some of these in GWT (and use JSNI for the missing parts).