Re: Moving objects and incremental redisplay

• To: Scott McKay <SWM@stony-brook.scrc.symbolics.com>
• Subject: Re: Moving objects and incremental redisplay
• From: Nichael Cramer <ncramer@BBN.COM>
• Date: Tue, 28 Sep 93 14:32:26 EDT
• Cc: bha@ata.ca.boeing.com, clim@BBN.COM

Scott McKay <SWM@stony-brook.scrc.symbolics.com> writes:

    Date: Tue, 28 Sep 1993 12:42 EDT
    From: Brian Anderson 234-0878 <bha@ata.ca.boeing.com>

    CLIM 2.0beta2
    ACL 4.2beta2
    Sparc
    [... Query about moving output records ...]

>For example, in order to move an object you simply:
>
> 1) compute the region of the object
> 2) move the object to its new position
> 3) replay the output records overlapping the objects old region
> 4) replay the output records overlapping the new region

A heads-up:

There seems to a problem in the CLIM if you move presentations around (this
certainly true in ACL-CLIM, don't know about the others).  Specifically the
standard, default output-history gets confused (this is particularly a
problem when presentations overlap and/or are at the same vertical
position).

It seems to help replace the output history in your window with something
like the following:

   :OUTPUT-RECORD (MAKE-INSTANCE 'CLIM::R-TREE-OUTPUT-HISTORY)

Cheers
Nichael

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