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FvwmBacker(1) FVWM Modules FvwmBacker(1)
NAME
FvwmBacker - the FVWM background changer module
SYNOPSIS
Module FvwmBacker
FvwmBacker can only be invoked by fvwm. Command line invocation of the
FvwmBacker module will not work.
DESCRIPTION
The FvwmBacker module provides functionality to change the background
when changing desktops. Any command can be executed to change the
backgrounds. Actually, any arbitrary command can be sent to fvwm to
execute, so you could also do things such as changing window border
colors, etc.
COPYRIGHTS
The FvwmBacker module is the original work of Mike Finger.
Copyright 1994, Mike Finger. The author makes no guarantees or war-
ranties of any kind about the use of this module. Use this modules at
your own risk. You may freely use this module or any portion of it for
any purpose as long as the copyright is kept intact.
INITIALIZATION
During initialization, FvwmBacker gets config info from fvwm's module
configuration database (see fvwm(1), section MODULE COMMANDS). Avail-
able options are discussed in a later section.
INVOCATION
FvwmBacker can be invoked by fvwm during initialization by inserting
the line
AddToFunc StartFunction I Module FvwmBacker
in the .fvwm2rc file.
FvwmBacker can be started using a 'Module FvwmBacker' command or
stopped using a 'KillModule FvwmBacker' command at any time when fvwm
is running.
FvwmBacker must reside in a directory that is listed in the ModulePath
option of FVWM for it to be executed by FVWM.
CONFIGURATION OPTIONS
The following options can be placed in the .fvwm2rc file
*FvwmBacker: Command (Desk d, Page x y) command
Specifies the command to execute when the viewport matches the
arguments for the desk d, page x coordinate and y coordinate.
Any or all of these three numeric arguments can be replaced with
an asterisk (*) to indicate that any value matches, in this case
Desk or Page parts can be skipped.
If either the Desk or the Page parts are omitted, the command is
not executed if only the desk or the page is switched. If
neither is given, the command is executed only once when the
module is started. This is not the same as using asterisks for
the numeric arguments: if asterisks are used, the command is
always executed when only the desk or page changes, if the cor-
responding part is omitted, the command is never executed when
only the desk or page changes.
If the command is -solid FvwmBacker uses the next argument as a
color in the X database and sets the background to that color
without generating a system call to xsetroot (only single word
color names may be used).
If the command is colorset FvwmBacker uses the background speci-
fied in colorset n for the given desk. Please refer to the man
page of the FvwmTheme module for details about colorsets.
Otherwise the command is sent to fvwm to execute.
*FvwmBacker: RetainPixmap
Causes FvwmBacker to retain and publish the Pixmap with which
the background has been set. This works only for the -solid or
colorset commands. This is useful for applications which want to
use the root Pixmap on the background to simulate transparency
(for example, Eterm and Aterm use this method). This option
should also be used for the RootTransparent colorset option (see
the FvwmTheme man page). Note: with a colorset background this
command may add a lot of memory to the X server. For example,
this adds the pixmap width times height bytes with a TiledPixmap
image, screen_width times screen_height bytes with a Pixmap
image or a C,B,D,R,S or Y Gradient and screen_width bytes with a
VGradient or screen height bytes with an HGradient.
*FvwmBacker: DoNotRetainPixmap
Cancels the effect of the previous option. This is the default.
OLD-STYLE OPTIONS
There is continued support for the now deprecated option:
*FvwmBacker: Desk d command
It is functionally equivalent to omitting the page coordinates
with *FvwmBacker: Command:
*FvwmBacker: Command (Desk Id) command
SAMPLE CONFIGURATION
The following are excepts from an .fvwm2rc file which describe Fvwm-
Backer initialization commands:
####
# Set Up Backgrounds for different desktop pages (2 desks, 3x2 pages).
####
*FvwmBacker: Command (Page 2 *) -solid steelblue
*FvwmBacker: Command (Desk 0, Page 0 0) Exec fvwm-root $[HOME]/bg2.xpm
*FvwmBacker: Command (Desk 0, Page 0 1) -solid midnightblue
*FvwmBacker: Command (Desk 0, Page 1 *) -solid yellow
*FvwmBacker: Command (Desk 1, Page * 0) -solid navy
*FvwmBacker: Command (Desk 1, Page * 1) Colorset 5
AUTHOR
Mike Finger (mfinger@mermaid.micro.umn.edu)
(Mike_Finger@atk.com)
(doodman on IRC, check the #linux channel)
Modified by
Andrew Davison (davison@cs.monash.edu.au)
Michael Han (mikehan@best.com)
Mikhael Goikhman (migo@homemail.com)
3rd Berkeley Distribution 20 January 2006 (2.5.16) FvwmBacker(1)
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Sat Sep 8 16:35:07 GMT 2007
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