applications - App/shortcut to quickly change screen lock type?

Two scenarios:

1. I'm at a "trusted" place, and don't want to enter unlock password/pattern all the time



2. I'm at an "untrusted" place and want my phone to be password/pattern screen locked

is there any way to use some kind of a shortcut/app which would quickly switch the way the screen gets locked? for example (when my screen is unlocked) - I press an icon and the lock type changes from using just a regular unlock method to password/pattern unlock method and vice versa.

using android2.2

edit: added a new answer below on what I now use to accomplish this (using android2.3.7)

thank you

Answer

In the mean time I got 2.3.7 up and in case someone needs another solution - now I use power widgets to toggle screen lock on and off manually. When I am on my home network, I use WIFi Unlocker to keep the screen lock turned off while the connection is on. Works very nice.

edit: After upgrading to 4.2+ I simply started using built-in Android profiles. Screen lock types can be set there and can then be easily switched through the "long-press-power-button-menu".