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Designing Custom ComboBox Control

I'm working on a "picklist" control for data-entry in a windows desktop application.  Overall, it's pretty standard stuff: the control has a list of values, autocompletion, sorting, add-to-list support, and validation.  The bulk of it would work nicely using combobox and SHAutoComplete.

What I'm debating is also having a multi-select mode and possibly, a *categorized* multi-select mode.  The filter UI in Excel 2007 does something very similar here:

http://www.isamrad.com/dgainer/af3_11-01-2005.png

I like the idea of quickly being able to select multiple values, and categorization seems handy as well.  Still, I wonder what would happen with the textbox portion of the control.  All I can think of is a read-only delimited list of values at the moment.  It seems you'd want to disable text input entirely and only accept selection using the mouse and/or arrow-keys.

I don't want to invent a "platypus" control, however; so I would appreciate feedback.  Has anyone seen a clean dropo down listbox somewhere?  I realize its a bit strange, but my main goals were to preserve real estate and speed data-entry for the user.  The control is intended for scenarios where there is good amount of data entry happening.  Thanks.
melon_helmet
Tuesday, July 25, 2006
 
 
Check out the VB Accelerator ComboBox control: http://www.vbaccelerator.com/home/VB/Code/Controls/Combo_and_List_Boxes/ComboBoxEx/article.asp

If it doesn't do what you want, it'll at least give you a great jump start in developing your own.
Former COBOL Programmer
Wednesday, July 26, 2006
 
 

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