Ok, I managed a few things.   I published to the inbox:

ToolBuilder-Kernel
ToolBuilder-Morphic

I got the checkbox implemented.  Far from perfect, it has a funny 
background.   It works, though.

I also got the infrastructure done for a DropDownListMorph. 
#installDropDownList on the class is the method which builds the widgetry. 
Currently, it has a label and a button.  I couldn't figure out how to "drop 
down" the list.

I decided to use just a list instead of a drop down for my trace viewer.  It 
works good.

Rob

--------------------------------------------------
From: "Andreas Raab" <andreas.raab at gmx.de>
Sent: Friday, September 10, 2010 12:17 PM
To: "The general-purpose Squeak developers list" 
<squeak-dev at lists.squeakfoundation.org>
Subject: [squeak-dev] Re: CheckBoxes and Drop-down Lists 
withMorphicToolBuilder

> On 9/10/2010 3:47 AM, Rob Withers wrote:
>> I am trying to build a log viewer that will filter the results based on
>> check boxes selected and a selection in a drop-down box. I am using the
>> MorphicToolBuilder to do so, but I am having trouble figuring this out.
>>
>> CheckBoxes: I see ToolBuilder>>#buildPluggableCheckBox:, but it defers
>> to #buildPluggableButton:. I didn't see a PluggableCheckBoxMorph or
>> anything. Is there a way to configure a PluggableButtonMorphPlus to be a
>> CheckBox?
>
> Currently not. It's a place holder. Up for extending this properly?
>
>> DropDownMenuBox: I didn't see anything about this. Is there a way to do
>> thid?
>
> No, but it should extend the pluggable list. Then you'd need a properly 
> fronting widget for it, just like with the checkbox.
>
> Cheers,
>   - Andreas
>
>