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This document contains a summary of available user default values that one can set to control the operation of the GNUstep libraries.
Below is a list of defaults used to control the gnustep-gui library.
A string containing the name of the backend bundle to use for display specific GUI handling. The default is "libgnustep-xgps". Currently the only other choice is "libgnustep-xdps".
A boolean value, NO by default. When the feature is on,
NSBrowserCell draws non-leaf cells in bold system font.
For example, when the feature is on, in a SavePanel (or OpenPanel),
directory entries are drawn in bold, while simple files are drawn in
non bold.
A string, DefaultKeyBindings by default. This
string (with .dict appended) is the name of the
files the library reads to load the default keybindings.
The library first tries to read the file with that name from
the
$GNUSTEP_SYSTEM_ROOT/Libraries/Resources/KeyBindings/
directory, loading all the keybindings it finds in the file,
then it loads the similar file from
$GNUSTEP_LOCAL_ROOT and then the similar one
from $GNUSTEP_NETWORK_ROOT and at last the one
from $GNUSTEP_USER_ROOT. If you change the
GSDefaultKeyBindings user default, the library
will not load the default keybindings contained in the
system DefaultKeyBindings.dict file, but
instead load the specified files in its place. You normally
don't want this (so this option is rarely used), because you
normally just want to add your own keybindings to the
default ones, and to do this, you can just add a
DefaultKeyBindings.dict file in your
~/GNUstep/Libraries/Resources/KeyBindings/
directory, and keybindings from this file are automatically
loaded in addition to the default ones. Setting
GSDefaultKeyBindings will instead cause the
default keybindings not to be read at all.
An array of strings. If set, the strings are interpreted as
filenames and the keybindings from those files are loaded after
the default ones, in the order they are specified in the array.
Might be useful if you want to have different applications use
different keybindings (you can then run each application with
a different GSCustomKeyBindings default).
A boolean value, NO by default. When the
feature is on, the save panel and its subclasses (such as
the open panel) displays "Reading Directory ***.."
(progressively adding dots) in the window titlebar while
reading very big directories (more than 100 entries). This
is meant to make things friendlier for slow computers.
A boolean value that defaults to NO. This is a
obscure and probably not useful default. NSWorkspace tries
to receive distributed notifications, but if a distributed
objects server cannot be found or some other error occurs,
it raises an exception which normally terminates the
program. Setting this default causes NSWorkspace to just log
the problem without raising an exception.
A string value that defaults to "GSWorkspace".
This defines the application NSWorkspace will try to
connect to process some operations that require an external
application. This is a new feature and has not been tested.
A string describing the interface style. Setting this may change various aspects of how the library draws elements and responds to user interaction. See the NSInterfaceStyle documentation for more information.
An interface style specific to menu operation. If not set the NSInterfaceStyleDefault value is used.
A dictionary of command key equivalents for menu items. The key contains the title of the menu item and the value is the command key equivalent. For instance, one might set the command key for the menu item "Copy" to "C".
Used by NSPasteboard to find the host on which the pasteboard server is running.
A string describing the measurement unit for rulers (see the NSRulerView class documentation). The default is Centimeters. Other possible values are Inches, Points, and Picas.
System colors may be set using the defaults system. System colors are standard colors for drawing various GUI elements, such as buttons, text, scroller, etc. The value is a dictionary describing the color. The keys that can be used for setting the system colors are described in the documentation for NSColor.
System Fonts may be set using the defaults system. System fonts are standard fonts for drawing text in GUI elements. They include NSBoldFont, for instance. The value is the name of the font to use. There is also a cooresponding size key (e.g. NSBoldFontSize) for specifying the point size of the font. The keys that can be used for setting the system fonts are described in the documentation for NSFont.
Below is a list of defaults used to control the gnustep-xgps backend. These defaults generally control system specific display and user interaction options which may not be available on all systems.
An integer that specifies the X-Windows visual class to use in the application. For instance one could display the application using the PsuedoColor visual class by setting the value to the id of this class. The default is the X-Windows default visual class.
An integer which limits the maximum number of colors to display, per channel. For a psuedo-color display, this would limit the total number of colors that the application could use (normally 256). For a true-color display, this would limit the range of red, green, and blue values that could be used.
A boolean value which defaults to NO. Some Window
Managers and/or X servers put a border around windows that are
supposed to be borderless. Set this to YES if you
have odd problems of menus/windows moving when you click on them.
A boolean value which defaults to NO. If set to
YES and the X-Windows system has the XFT
extension, then the application will use anti-aliased fonts
as provided by the X-Windows system.
A string value which defaults to "*". It defines
the pattern used to get the installed fonts from the
X-Server. A value of "*-iso8859-1" would only
include fonts available with ISO Western encoding. This
feature might be helpfull if the font_cacher program is having
problem with the X-Server.
A boolean value which defaults to YES. If set to
YES, then the application uses various tricks
to get alpha colors to work when compositing images. This
may slow down drawing of images, but it is generally
recommended anyway, particularly on fast systems.
The OPENstep specification requires 3 main different
keyboard modifiers: CONTROL,
COMMAND and ALTERNATE. Some systems
may not have these set up correctly. You can changed the defaults
with the default keys.
Default values are respectively:
This is described more completely in the GUI documentation.
A boolean value which defaults to YES. If set to
YES then icon windows are controlled by the
window manager, otherwise they are controlled by the GNUstep
application.
A boolean value which defaults to YES (as long as shared
memory is available). If set to NO, shared memory is not
used for various display specific operations.