More detailed progressbars

When you want to preview files that you are downloading, you need to know which parts of files have been downloaded.
For example, for an avi file you need the first parts of file so you can preview it.
In transmission, it is not possible to see which parts of files have been downloaded (in some of other clients like ktorrent it is possible).

I posted this as an idea in Ubuntu brainstorm: http://brainstorm.ubuntu.com/idea/25432/
But now, I think it is better to report it here.

Possible solutions are:

Solution #1: Provide a more detailed progressbar for transmission in the main window:
The new progressbar should be filled by considering the downloaded parts, like ktorrent.
There can be a plus(+) sign in the left side of each torrent to expand it and see more detailed progress of each file in that torrent.
So for the child files, the progressbar should be filled in the parts which has been downloaded.
I don't mean a normal, solid progressbar. I mean a progressbar like ktorrent's.

Solution #2: Provide a more detailed progressbar for transmission in the properties window:
The main progressbar should not be changed.
The progressbar in front of each file in the properties window for files should display the details.
So the progressbar for each file in the properties window should be filled in the way that it shows the parts that have been downloaded, like ktorrent's progressbars. Not a solid progressbar.

Solution #3: Show visual list of packets:
Show :
* Green : Packet downloaded !
* Orange : Packet is downloading…
* White : no imformation about this packet.
* Red : Nobody have this packet.