- Dragging

From: [at]} <Gérard>
Date: Sun, 24 Sep 2006 17:24:03 +0200

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Douglas G. Danforth a écrit :
> Gérard,
>
> The example:
> o View displaying a bitmap image
> o Square box boarder written into view that will be moved by mouse
> dragging.
> o Wrapper surrounding view that catches mouse events
> o mouseHandler installed in wrapper view
> o mouseHandler is called on TrackMsg and f.Input
> o mouseHandler routine performs Views.Update (or Views.RestoreDomain)
>
> If Views.RestoreDomain is called then nothing works (neither single
> clicks nor
> mouse dragging refreshes the screen). If Views.Update is call then
> single
> clicks works correctly (box is moved to cursor location).
>
> I think the problem is in letting the system "breath" so that messages
> are passed
> correctly. I am about to implement a Services action to handle the
> f.Input calls.
>
> -Doug
You may be right. But RestoreDomain works well with f.Input for standard
views, so I'm a little sceptical. Another way is to to call the Restore
method of the view from its HandleViewMsg procedure.

Gérard

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Received on Sun Sep 24 2006 - 17:24:03 UTC