A few people replied on my email (thanks), saying that I might use an
animated layer to prevent MI from clearing the window before redrawing.
However, this will not be possible since the thing I want to redraw is a
thematic map and as far as I know this can not be done in a animated layer.
Also my problem is a bit different from what I thought it was.
Mapinfo adjusts a thematic map automatically whenever you change the
underlying data from within MI. However my data is not changed within MI but
is changed by another program. The changes made outside of MI are not
automatically detected by MI, and subsequently the thematic map is not
adjusted. The only way I know to let MI detect the changes is by redrawing
the window which results in the clearing of the window for every redraw.
So to solve my problem I should I either know another way (than redrawing
the window) to let MI detect the changes made in the table, or a way to
prevent MI from clearing the window whenever it redraws the window.
Piebe
p.s. Steve, I indeed make animated GIFs from these timeseries, however since
my program runs for quite some time, it would be nice for both testing and
demos to have the possibility to directly present the results. (The use of a
dot density thematic map is very good idea, indeed.)
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Thursday, June 03, 1999 6:22 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: RE: MI Redraw without clearing
Hi Piebe,
You could try using an animation layer for this - you would need to use
Mapbasic. This is a special layer type with a quick redraw for that layer
only. I have yet to try this out!
eg.
open table "My_layer" interactive
Add map layer My_layer animate
Hope this helps!
Pete, Ordnance Survey, UK
----------
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: MI Redraw without clearing
Date: 03 June 1999 15:12
Does anybody know if it is possible to let mapinfo redraw a window without
first clearing it?
I try to show the evolution of a certain map over time. Thus each timestep
the data in the table is changed and mapinfo redraws the window. Everything
works fine except that I am looking to a white window for 80% of the time.
It would be nice if mapinfo could just draw the map over the old one instead
of first making the window white. Anybody?
Piebe
--
Piebe de Vries
International Centre for Integrative Studies (ICIS)
Faculty of General Sciences
Maastricht University
P.O. Box 616
6200 MD Maastricht
The Netherlands
Visiting address: Kapoenstraat 23, Maastricht
[EMAIL PROTECTED]
tel: +31.43.3882691 or +31.43.3882662 (secr.)
fax: +31.43.3210541
website: http://www.icis.unimaas.nl/
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