Example of Dynamic Appearance of Locator in LocatorPane?

*To*: mathgroup at smc.vnet.net*Subject*: [mg82443] Example of Dynamic Appearance of Locator in LocatorPane?*From*: "W. Craig Carter" <ccarter at mit.edu>*Date*: Sat, 20 Oct 2007 05:55:22 -0400 (EDT)

Does anyone have a short example of using Dynamic with LocatorPane Option for Appearance? For example, I am trying to get this: Manipulate[ DynamicModule[{pos = {1, 1/2}}, LocatorPane[Plot[Sin[x], {x, 0, 2 Pi}], Appearance -> (*immediate*) Dynamic[Graphics[Circle[pos, radius]]]]], {{radius, .2}, 0, 1}] or this: Manipulate[ DynamicModule[{pos = {1, 1/2}}, LocatorPane[Plot[Sin[x], {x, 0, 2 Pi}], Appearance :> (*delayed*) Dynamic[Graphics[Circle[pos, radius]]]]], {{radius, .2}, 0, 1}] to work. I can get the locator to move, but I'd like to get it to shrink and use its radius to calcuate other things. Thanks. W. Craig Carter

**Follow-Ups**:**Re: Example of Dynamic Appearance of Locator in LocatorPane?***From:*"Ricardo Samad" <resamad@gmail.com>