[GRASS-user] grass70 and display monitor

[Glynn Clements]

Vincent Bain wrote:

> my question could be insane but I am wondering if there is an equivalent
> command to d.mon in grass70.
> In several man pages I saw a reference to d.frame but it seems not be
> implemented yet.
> 
> Or will grass70 give up with x monitors ? considering one still can
> launch grass in text mode, I guess there might be a way to open a
> graphical device.

GRASS 7.0 does not support monitors. The various display "drivers" are
libraries against which the display library is linked. There are no
persistent monitor processes as in 6.x, meaning that there is no
persistence of state between d.* commands, so no d.frame, d.font etc.

All rendering parameters are set via environment variables. Some of
these are listed in the "variables" manual page, while others are
listed in the manual pages for the various drivers.

You can approximate the pre-7.0 workflow using an image viewer which
automatically refreshes the display whenever the file changes. For X,
you can use the ximgview program, e.g.:

	export GRASS_PNGFILE=map.bmp
	d.erase
	ximgview &
	export GRASS_PNG_MAPPED=TRUE
	export GRASS_PNG_READ=TRUE
	# more d.* commands

-- 
Glynn Clements <glynn at gclements.plus.com>