[GRASS5] Improvements to gis.m map canvas

[Jachym Cepicky]

Hallo,

does this mean, gis.m will be able to "hear" at least some of the d.*
commands? That would be great!

Jachym


On Tue, May 02, 2006 at 09:11:48PM -0700, Cedric Shock wrote:
> Hi,
> 
> I made a couple fairly big improvements to gis.m. The redrawing of mapcanvases 
> is now regulated by a little server that waits for requests and redraws 
> whenever there's a request. This keeps the redraws down to one at a time. 
> This makes resizing the canvas and zooming work more smoothly.
> 
> A procedure that wants the canvas redrawn should now do
> MapCanvas::request_redraw $mon 1
> if the procedure changed the canvas or the view and
> MapCanvas::request_redraw $mon 0
> if the view and canvas are unchanged.
> 
> I removed a few unnecessary "source"s and "after"s. gis.m starts 4-5 seconds 
> faster on my computer now. That's about half the time spent between when 
> gm.tcl starts running and when it reaches the end. The biggest chunks of 
> startup time now are wish starting, disk access to source the files, and 
> running the procedures and parts of sourced files that actually do something 
> on startup. Sourcing all the code that does nothing seems to have virtually 
> zero cost beyond disk access. This shouldn't be surprising since the procs 
> aren't compiled until their first use.
> 
> There is still one "after" in MapCanvas::mapsettings after running "d.mon 
> stop=gism" to "wait to make sure that the driver is shut down". This is 
> probably extraneous, but I'm not sure since the R_ commands seem to just push 
> messages off to another process. If it's not needed we can shave a nice 
> big .5 seconds off many redraws.
> 
> --Cedric
> 
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-- 
Jachym Cepicky
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