[GUI] How to create objects and how to get/set their attributes

[Glynn Clements]

David Sankel wrote:

> The second is a motif style (please correct me if I
> have this wrong):
> 
> button <- create "Button" parentWindow [ title =:
> "Hello", position =: (0,0), size =: (300,50) ]
> set button [ onPress =: (buttonPressed button) ]

Xt (Athena/Motif) style is more like:

	formW :: FormWidget
	acceptB, cancelB :: ButtonWidget

	formW <- create "yesNoForm" shellW []

	acceptB <- create "accept" formW []
	addCallback acceptB onAction acceptFunc
	addCallback acceptB onAction closeFunc

	cancelB <- create "cancel" formW []
	addCallback cancelB onAction cancelFunc
	addCallback cancelB onAction closeFunc

I suppose that you could make the callback list a property, e.g.:

	acceptB <- create "accept" formW [onAction =: [acceptFunc, closeFunc]]
	cancelB <- create "cancel" formW [onAction =: [cancelFunc, closeFunc]]

but it's more usual to add/remove callbacks independently than to set
the entire callback list in one go.

Everything else can (and probably should) go into the resource files.

-- 
Glynn Clements <glynn.clements@virgin.net>