[GRASS5] Wishes and GUI code cleanup patch

[Michael Barton]

Laurent,

In fact the display resolution is not related to the data resolution, at
least in the new GIS Manager. The data resolution is set by g.region and the
display resolution is set by environmental variables GRASS_WIDTH and
GRASS_HEIGHT.

What slows things down at high resolution is doing exactly what you suggest.
The display modules recalculate and output their high resolution data to a
much lower resolution screen display. This recalculation takes some time.
But after it's done, the screen looks nice at lower resolution. Also, in the
new GIS Manager, if you've rendered this once and don't need to change the
way a layer is rendered, it is not re-rendered on subsequent displays--only
recomposited with other layers. This speeds things up a lot.

Michael


On 3/13/06 12:49 PM, "Laurent Courty" <lrntct at gmail.com> wrote:

> Cedric Shock wrote:
>> Hi,
>> 
>> If anyone else has any wishes for the generic GUI, now is a good time to kick
>> them around here.
> Hi,
> 
> I have a wish about display, but maybe it's not concerning the "generic
> GUI".
> It will be cool if the display resolution where "defaulted" to screen
> resolution when the "region resolution" is to big. Currently grass
> display all the cells, even if they aren't visible. With high
> resolution, display is very slow.
> Sometimes it could be fine to have a high resolution for calculation and
> be able to pan without waiting.
> I don't know how difficult it is, though.
> 
> Laurent
> 

___________________________
Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Arizona State University
Tempe, AZ  85287

WWW - http://www.public.asu.edu/~cmbarton
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