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Is it possible to have a ListBox contain something other than a String? I'm hoping for something similar to what Adobe Flex allows where you "plug in" a generic component (Widget in TWL's case). Basically you provide a custom item renderer to draw each item in the list, etc. Examples don't appear to do anything like this so I'm guessing it's not a current feature? (Would it be hard to implement if not?)

I suggest to switch to Table which is more flexible with custom cell renderer etc - but it's also possible with ListBox by subclassing it can overriding createDisplay().

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TWL - The Themable Widget Library

Oh okay, I'll take a look at Table.

Table seems somewhat complicated to use (TableDemoDialog1.java), is there a better example or developers guide somewhere that I've neglected to review? Not having much luck figuring out what's needed for such functionality, what the difference between a WidgetCreator/Renderer is, the purpose of a model, etc.

The TableModel contains the data displayed in the Table widget, similar to the ListModel. Use AbstractTableModel as base if you want to create your own.

The CellWidgetRenderer uses a stamping approach for rendering custom data - see DecoratedTextRenderer from the TWL Theme Editor as example.

A CellWidgetCreator adds the ability to the CellWidgetRenderer to create a widget per table cell (like a combo box, edit field etc). This is also used by the Theme Editor in the GradientStopEditorFactory class (as a inner class).

The CellWidget* instances are registered by the data type of the cell. See the 2nd link for details.

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TWL - The Themable Widget Library