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d.mon - Controls graphics display monitors from the command line.
display, graphics, monitors
d.mon d.mon --help d.mon [-lpcgsrtux] [start=string] [stop=string] [select=string] [width=value] [height=value] [resolution=value] [bgcolor=name] [output=name] [--overwrite] [--help] [--verbose] [--quiet] [--ui] Flags: -l List running monitors and exit -p Print name of currently selected monitor and exit -c Print commands for currently selected monitor and exit -g Print path to support files of currently selected monitor and exit -s Do not automatically select when starting -r Release and stop currently selected monitor and exit -t Disable true colors -u Open output file in update mode Requires --overwrite flag -x Launch light-weight wx monitor without toolbars and statusbar Requires ’start=wx0-7’ --overwrite Allow output files to overwrite existing files --help Print usage summary --verbose Verbose module output --quiet Quiet module output --ui Force launching GUI dialog Parameters: start=string Name of monitor to start Options: wx0, wx1, wx2, wx3, wx4, wx5, wx6, wx7, png, ps, html, cairo stop=string Name of monitor to stop Options: wx0, wx1, wx2, wx3, wx4, wx5, wx6, wx7, png, ps, html, cairo select=string Name of monitor to select Options: wx0, wx1, wx2, wx3, wx4, wx5, wx6, wx7, png, ps, html, cairo width=value Width for display monitor if not set by GRASS_RENDER_WIDTH Default value: 720 height=value Height for display monitor if not set by GRASS_RENDER_HEIGHT Default value: 480 resolution=value Dimensions of display monitor versus current size Example: resolution=2 enlarge display monitor twice to 1280x960 bgcolor=name Background color Either a standard color name, R:G:B triplet, or "none" Default: white output=name Name for output file (when starting new monitor) Ignored for ’wx’ monitors
d.mon allows the user to start, select, list, release, and stop available graphics monitors. Starting a monitor In order to display on-screen GRASS graphics, the user must start and select a graphics monitor. By default, the start command actually runs two commands, to both start and select whatever monitor is named by the user. The user can get a list of running monitors by setting the -l flag on the command line. Note that some monitor drivers use environment variables or the specific driver documentation. When a monitor is started, it is therefore also (automatically) selected for output, unless the -s flag is set by the user; the user can also explicitly select a monitor that has been started. The desired monitor should be started once and need not be restarted unless it is stopped for some reason. A monitor may continue to run for any length of time, even when no GRASS session is being run. Stopping a monitor A graphics monitor has two different types of status: monitor program not running, and monitor running. A monitor that has been started and/or selected will be listed as running; a monitor that has been stopped (or not started) will be listed as not running. The -l flag will list all currently running monitors. Selecting a monitor When the user starts a monitor, it is also (automatically) selected for graphics output unless the user sets the -s flag. In order to use (direct graphics output to) a monitor, the user must select that monitor for use, either by simply starting the monitor without the -s flag or by explicitly selecting the monitor for output. Only running monitors can be selected for graphics output. The user can run multiple graphics monitors by simply starting each of the graphics monitors the user wishes to direct output to. Releasing (unselecting) a monitor Currently selected a monitor can be released by -r flag.
d.mon is designed for interactive use. If non-interactive use is needed (e.g., in a script) set GRASS_RENDER_IMMEDIATE=png (or =cairo) and use the related environment variables to control output size etc.
wx0 monitor To start the interactive wxGUI map display, run d.mon start=wx0 Figure: The initialization of display monitor wx0 All subsequently displayed data will be rendered on monitor wx0. g.region raster=elevation -p d.rast map=elevation Figure: The display wx0 showing an elevation raster map CAIRO file renderer monitor A CAIRO monitor can be started (and selected) by d.mon start=cairo output=out.pdf From this moment on all displayed data will be rendered into file output.pdf. List running monitors To list the currently running monitors, use d.mon -l List of running monitors: wx0 cairo Show currently selected monitor To identify the currently selected monitor, use d.mon -p cairo Switching between monitors To switch back to interactive display mode, here to an earlier started and still running wxGUI monitor, use d.mon select=wx0 Stopping a monitor To close the wxGUI monitor, run d.mon stop=wx0
d.erase, d.redraw, d.rast, d.vect, d.frame See also list of variables for rendering, display drivers
Martin Landa, OSGeoREL, Czech Technical University in Prague, Czech Republic Last changed: $Date: 2017-12-13 09:37:43 +0100 (Wed, 13 Dec 2017) $
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