Re: What does HANDLE-EVENT do?

• To: jmorrill@BBN.COM
• Subject: Re: What does HANDLE-EVENT do?
• From: Nichael Cramer <ncramer@BBN.COM>
• Date: Sun, 29 May 94 17:38:35 EDT
• Cc: Nichael Cramer <ncramer@BBN.COM>, clim@BBN.COM

>From: Jeff Morrill <jmorrill@BBN.COM>
>  From: Nichael Cramer <ncramer@BBN.COM>
>  Subject:  What does HANDLE-EVENT do?
>  
>  I can't seem to get the method HANDLE-EVENT to be called....
>  
>    (clim:with-output-as-gadget (STREAM)
>       (clim:make-pane 'my-gadget
>                       :client *MY-CLIENT*
>                         ....)
>
>  In point of fact, the only time the method seems to be called _anywhere_ on
>  _anything_ is for a few POINTER-ENTER/EXIT-EVENTs on some viewports. [...]
>
>There is a file, custom-gadget.lisp, that I put some time ago on
>cambridge.apple.com.  It contains a working push-button and a working
>slider.  The test code displays them on an accept-values pane and they
>seem to work.  The button is displayed using with-output-as-gadget.
>The slider is displayed by defining a "view" and invoking ACCEPT.
>
>Perhaps by comparing your code with that code, you may see the problem.
>
>jeff

Jeff

Thanks for pointing me in the right direction.  

In case anyone else is interested, basically the problem was this:

I had (naively) assumed that I could use something resembling a standard
clim-pane to handle the events.  I.e. rather than building my gadget on top
of, say, CLIM:APPLICATION-PANE, I find I have to build it on top of (using
Jeff's example) SILICA::LEAF-PANE and SILICA:SPACE-REQUIREMENT-MIXIN (with
a sprinkling of appropriate clim::GADGET-*-MIXINs).

What I presume was happening is that _something_ in the intervening layers
was snatching the pointer-click events before I could get to them.

Nichael

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