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Problems with Dynamic inside Panel in V7

• To: mathgroup at smc.vnet.net
• Subject: [mg94875] Problems with Dynamic inside Panel in V7
• From: Cca <cca at gregosetroianos.mat.br>
• Date: Mon, 29 Dec 2008 06:40:09 -0500 (EST)
• Reply-to: Cca <cca at gregosetroianos.mat.br>

In V7, Dynamic objects inside a Panel can cause some strange "flashing" background effect. Here is an simple example:

DynamicModule[{col = Green},
 Panel@EventHandler[
   Dynamic@
    Graphics[{col, Disk[]}, 
     ImageSize -> 
      80], {"MouseClicked" :> (col = 
       col /. {Red -> Green, Green -> Red})}]]

Click on the disk and a gray retangle appears. This does not happen in V6. Any workaround? Something related to the new Panel options?

I have also seen this with Manipulate and it was necessary to set Paneled->False to cure the problem.

Carlos César de Araújo
Gregos & Troianos Educacional
www.gregosetroianos.mat.br
MSN: cca_gregosetroianos at hotmail.com
Belo Horizonte, MG, Brasil
(31) 3283-1122

• Follow-Ups:
  • Re: Problems with Dynamic inside Panel in V7
    • From: Murray Eisenberg <murray@math.umass.edu>