[GRASS5] Improvements to gis.m map canvas

[Michael Barton]

Because it is likely that drawing a box by hand with a mouse will not
exactly come up with the exact same x:y ratio of the current canvas. And in
fact this may be desired. Someone may want to switch from a display that is
wider than high to one that is higher than wide. Changing the canvas
geometry and region geometry are separate processes, of course. Then we have
to fit the displayed region to the canvas in such as way as to maximize
displayed information.

Michael
__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Center for Social Dynamics and Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton


> From: Glynn Clements <glynn at gclements.plus.com>
> Date: Wed, 3 May 2006 22:00:51 +0100
> To: Michael Barton <michael.barton at asu.edu>
> Cc: Cedric Shock <cedricgrass at shockfamily.net>, <grass5 at grass.itc.it>
> Subject: Re: [GRASS5] Improvements to gis.m map canvas
> 
> 
> Michael Barton wrote:
> 
>>> Also, it should only be necessary to restart the driver if the image
>>> dimensions are changed; changing the region shouldn't require a
>>> restart.
>> 
>> True. 
>> 
>> But for people changing the region interactively with the zoom tools, they
>> will also be changing the display geometry.
> 
> Why?
> 
> -- 
> Glynn Clements <glynn at gclements.plus.com>