There is no way that the Cowboys draft 7th now that Romo is out for the season. They will draft in the top 4, and as much as they wish a great QB prospect was there, its a dry QB year. They will take a CB or DE. MAYBE trade down to get Ezekial Elliot and pick up a an extra 2nd rnd pick.
Summary: Barton is an extremely gifted scorer when attacking the basket, and his length serves him well defensively and on the glass. However, at 170 pounds, handling the physicality of the pro game is his biggest obstacle in transitioning to the NBA. Because of that concern, he will likely be a late first/early second-round selection.
Player Comparison: Corey Brewer. Like Brewer, Barton is a long, athletic, slashing wing who entered the league needing to add muscle to thin skinny frames. Neither guy shoots the ball efficiently from the outside, but both excel in the open floor.