michael favia

Quick Response codes are really just slightly more robust versions of the UPC bar codes you see on your everyday purchases. Traditional bar codes require that everything is assigned an official ID and then they encode that long number in the bar code. When you buy something that number is scanned and the price and information about your product is looked up in a database.

QR codes let you encode more than the products ID in the graphic so the third party information isn't necessary.

Content Overlay

I traditionally find content overlays extremely useful for simple content operations and modal dialogs. For instance I patched and advocated an issue that would promote the delete operation on a node to a Menu Local Task like Edit and View currently are. This is in line with my views on implementing actions as decorators on the objects they perform their work on.

The proper use of a content overlay in this situation would be as a confirmation dialog for the delete operation.

I worked with some kind folks in the UX team to promote the delete button on the node edit form to a local menu task (aka tab) like edit, view, track and revisions are. The general consensus is that this is a good thing but Dries would like to unify the interaction model across core if we push it through. I couldnt agree more.