*NOTE: you do have to manually roll this one up.
You will see in the photos that I attached my shades to the door by nailing through a square dowel. That was before I saw how my sister-in-law did it: using velcro, with the sticky kind on the door**. I will give you the directions with the velcro option, since this is how I'd do it if I did it all over again.
**Another note-Don't make the same mistake I did. If you want to use velcro, ONLY use the adhesive kind on the door. DON"T TRY TO SEW THROUGH ADHESIVE VELCRO. I think it might be a common pastime in hell. I had to chuck my needles and the velcro and start over with the plain kind. Yes, it will mean you are wasting one side of the adhesive velcro, because only one half will be needed for the door, but trust me when I say this is the best way. :)
1) measure the window. (I'm putting the measurements I used, so change my dimensions to your own in the diagrams below).
You can have it be double-sided, but I just went for one layer of fabric since I had a budget and I don't care what the cats outside think. Since I went with one layer, I realized it would hang funny and not straight at all. I fixed this by rolling the hem at the bottom and running a thin wooden dowel through the loop. You can get them really cheap at Lowes in the Molding section.
Make a hemmed panel for a valance that is the same width (or even a little bigger if you want) and 16 inches tall. It's going to hang from the middle, with 8" on each side. If your fabric is directional, like the flowers in the diagram, then cut your panel in half, turn one side, and sew it back together. You want the top edge of each sewn together. That way when you hang it from the middle both sides of the valance are facing up.
5) Sewing the pieces of the valance together:
a) First get a strip of the rough side of the velcro (non-adhesive). You want it a little shorter than your valance. Sew it to one outer side, along the center line.
b) Next sew the straps to the inside of the valance, 1 1/2" from each end. You'll sew along the center line. Put the long side of the strap (6" tail) on the panel with the velcro on the back. Keep in mind the orientation of the straps if you have a directional pattern. When you roll up the finished product, you'll point the end of the long strip upwards. I wanted the fabric to be oriented correctly in this position. Thus, in the diagram above, the flowers on the straps are facing downward.
c) Third, add velcro squares to the short strips. (This is how the curtain will stay rolled up). Remember, NON-ADHESIVE! On both sides, have the rough squares be 1 1/2" from the center line down the strip. The allowance in strip length comes in here. There's still a long tail past the velcro in the diagram. It actually only needs to be a half inch past the velcro, but I liked the way a longer tail looked.
d) On the long side, it doesn't matter how close the velcro is to the end, but I aesthetically centered a soft velcro square about a half inch from each edge at the end. Put another soft velcro square exactly on the other side of the long end (see the turned flap in the drawing?).
6) Now we are going to sew the window panel to the valance. Sew the edge of the panel fairly close to the center line, but not on top of it. That get's bulky. Don't sew over the straps. Just skip the space.
You're only going to use the soft side of the ADHESIVE velcro. Throw the rough side away or save it for...who knows what...
Make the soft strip the same length as what you have sewn onto the valance and center it above your window.
When the shade is down, you can fasten the straps up and away so you don't see them hanging down. When you roll it up, roll it so the fabric side is outside. It's cuter that way. If you made your panel double-sided, this doesn't really matter!
Now, go eat your favorite dessert while you tell yourself how awesome you are for making this!