Customizing Backlight/Display Settings

[muzicman82]

Here's the display and backlight settings I'm looking for. I may need a 3rd party app to accomplish this, so I'm open for recommendations.

While charging, I want the display to be on at full brightness and to never shut off or dim. I already have the preference set to "Stay awake".. gets me why they put that under Applications -> Development. That keeps the screen on, but it dims after a minute or so.

While on battery, I want the display to shut off after a minute and to be on auto-brightness.

I know there's widgets that will allow me to set or change my display settings, but I'd like it to be an automatic thing.

Any suggestions?