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Presn Questions


<Env:  CLIM version 27 on SMBX x400, Genera 8.1>

I am creating about 1600 rectangular presentation items 
(all uniform) on the screen to represent certain objects.  
The user may request changing the size of the objects (all 
objects simulataneously), in which case I have to erase the 
previous presentations (window-clear) redraw the new 
presentations.  WHICH TAKES A WHILE. Furthermore, this is annoying 
especially so because there is other non-presentation graphics in 
the window (which is easy to draw but no-good aesthetically).

Q1: Is there an easy way to change the shape of a 
presentation? CLIM manual says not to mess with size/shape of 

These presentations are also "flipped" (like in a bitmap
editor) and when refreshing the window, it replays all 
the previous output.  I tried not recording, (using
with-output-recording-options with :record-p nil) and 
that had its problems when scrolling the window and such (I don't
remeber exactly since I had tried this a while ago but I 
can reproduce and explain it if its necessary).

Q2: Is there a way to not replay output. 

I guess the solution I am looking for is to draw these
presentations in the background (in a process maybe) and 
write to an output record. Then replay the output record on my
window. This way, I have the output record I want.  But 
it still takes a long time to draw these presentations.  
Ideally, I should just change the size of each and be done with 
it.  (That way, I also retain those that are selected.)

Finally, the same program goes into a phase where the
presentations are not mouse sensitive.  Currently they 
are drawn inside a with output as presentation and used via 
a presentation to command traslator. 

Q3: Is there a way to remove (and add) a translator at 
run time (is this recommended by CLIM?).  

I am writing portable code and dont want to mess with 
low level stuff.  If something is inthe"standard" (or not
recommended) than I want to stay away from it for fear 
it wont be supported on all CLIMs.  Should I be so (overly) 

Thanx in advance.  Please respond directly to my email
address. I'll summarize results, especially the 
innovative one. 

-- Rahul Bhatt


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