emacs/man/xresources.texi

@c This is part of the Emacs manual.
@c Copyright (C) 1987,93,94,95,1997,2001,03 Free Software Foundation, Inc.
@c See file emacs.texi for copying conditions.
@node X Resources, Antinews, Command Arguments, Top
@appendix X Options and Resources

  You can customize some X-related aspects of Emacs behavior using X
resources, as is usual for programs that use X.  On MS-Windows, you
can customize some of the same aspects using the system registry.
@xref{MS-Windows Registry}.  X resources are the only way to customize
tooltip windows and LessTif menus, since the libraries that implement
them don't provide for customization through Emacs.  This appendix
describes the X resources that Emacs recognizes and how to use them.

@menu
* Resources::           Using X resources with Emacs (in general).
* Table of Resources::  Table of specific X resources that affect Emacs.
* Face Resources::      X resources for customizing faces.
* Lucid Resources::     X resources for Lucid menus.
* LessTif Resources::   X resources for LessTif and Motif menus.
* GTK resources::       Resources for GTK widgets.
@end menu

@node Resources
@appendixsec X Resources
@cindex resources
@cindex X resources
@cindex @file{~/.Xdefaults} file
@cindex @file{~/.Xresources} file

  Programs running under the X Window System organize their user
options under a hierarchy of classes and resources.  You can specify
default values for these options in your X resources file, usually
named @file{~/.Xdefaults} or @file{~/.Xresources}.
If changes in @file{~/.Xdefaults} do not
take effect, it is because your X server stores its own list of
resources; to update them, use the shell command @command{xrdb}---for
instance, @samp{xrdb ~/.Xdefaults}.

  Each line in the file specifies a value for one option or for a
collection of related options, for one program or for several programs
(optionally even for all programs).

@cindex Registry (MS-Windows)
  MS-Windows systems don't support @file{~/.Xdefaults} files, but
Emacs compiled for Windows looks for X resources in the Windows
Registry, under the key @samp{HKEY_CURRENT_USER\SOFTWARE\GNU\Emacs}
and then under the key @samp{HKEY_LOCAL_MACHINE\SOFTWARE\GNU\Emacs}.

  Programs define named resources with particular meanings.  They also
define how to group resources into named classes.  For instance, in
Emacs, the @samp{internalBorder} resource controls the width of the
internal border, and the @samp{borderWidth} resource controls the width
of the external border.  Both of these resources are part of the
@samp{BorderWidth} class.  Case distinctions are significant in these
names.

  In @file{~/.Xdefaults}, you can specify a value for a single resource
on one line, like this:

@example
emacs.borderWidth: 2
@end example

@noindent
Or you can use a class name to specify the same value for all resources
in that class.  Here's an example:

@example
emacs.BorderWidth: 2
@end example

  If you specify a value for a class, it becomes the default for all
resources in that class.  You can specify values for individual
resources as well; these override the class value, for those particular
resources.  Thus, this example specifies 2 as the default width for all
borders, but overrides this value with 4 for the external border:

@example
emacs.BorderWidth: 2
emacs.borderWidth: 4
@end example

  The order in which the lines appear in the file does not matter.
Also, command-line options always override the X resources file.

  The string @samp{emacs} in the examples above is also a resource
name.  It actually represents the name of the executable file that you
invoke to run Emacs.  If Emacs is installed under a different name, it
looks for resources under that name instead of @samp{emacs}.

@table @samp
@item -name @var{name}
@opindex --name
@itemx --name=@var{name}
@cindex resource name, command-line argument
Use @var{name} as the resource name (and the title) for the initial
Emacs frame.  This option does not affect subsequent frames, but Lisp
programs can specify frame names when they create frames.

If you don't specify this option, the default is to use the Emacs
executable's name as the resource name.

@item -xrm @var{resource-values}
@opindex --xrm
@itemx --xrm=@var{resource-values}
@cindex resource values, command-line argument
Specify X resource values for this Emacs job (see below).
@end table

  For consistency, @samp{-name} also specifies the name to use for
other resource values that do not belong to any particular frame.

  The resources that name Emacs invocations also belong to a class; its
name is @samp{Emacs}.  If you write @samp{Emacs} instead of
@samp{emacs}, the resource applies to all frames in all Emacs jobs,
regardless of frame titles and regardless of the name of the executable
file.  Here is an example:

@example
Emacs.BorderWidth: 2
Emacs.borderWidth: 4
@end example

  You can specify a string of additional resource values for Emacs to
use with the command line option @samp{-xrm @var{resources}}.  The text
@var{resources} should have the same format that you would use inside a file
of X resources.  To include multiple resource specifications in
@var{resources}, put a newline between them, just as you would in a file.
You can also use @samp{#include "@var{filename}"} to include a file full
of resource specifications.  Resource values specified with @samp{-xrm}
take precedence over all other resource specifications.

  One way to experiment with the effect of different resource settings
is to use the @code{editres} program.  Select @samp{Get Tree} from the
@samp{Commands} menu, then click on an Emacs frame.  This will display
a tree showing the structure of X toolkit widgets used in an Emacs
frame.  Select one of them, such as @samp{menubar}, then select
@samp{Show Resource Box} from the @samp{Commands} menu.  This displays
a list of all the meaningful X resources and allows you to edit them.
Changes take effect immediately if you click on the @samp{Apply} button.

@node Table of Resources
@appendixsec Table of X Resources for Emacs

  This table lists the resource names that designate options for
Emacs, not counting those for the appearance of the menu bar, each
with the class that it belongs to:

@table @asis
@item @code{background} (class @code{Background})
Background color name.

@item @code{bitmapIcon} (class @code{BitmapIcon})
Use a bitmap icon (a picture of a gnu) if @samp{on}, let the window
manager choose an icon if @samp{off}.

@item @code{borderColor} (class @code{BorderColor})
Color name for the external border.

@item @code{borderWidth} (class @code{BorderWidth})
Width in pixels of the external border.

@item @code{cursorColor} (class @code{Foreground})
Color name for text cursor (point).

@item @code{font} (class @code{Font})
Font name for text (or fontset name, @pxref{Fontsets}).

@item @code{foreground} (class @code{Foreground})
Color name for text.

@item @code{geometry} (class @code{Geometry})
Window size and position.  Be careful not to specify this resource as
@samp{emacs*geometry}, because that may affect individual menus as well
as the Emacs frame itself.

If this resource specifies a position, that position applies only to the
initial Emacs frame (or, in the case of a resource for a specific frame
name, only that frame).  However, the size, if specified here, applies to
all frames.

@item @code{fullscreen} (class @code{Fullscreen})
The desired fullscreen size.  The value can be one of @code{fullboth},
@code{fullwidth} or @code{fullheight}, which correspond to
the command-line options @samp{-fs}, @samp{-fw}, and @samp{-fh}
(@pxref{Window Size X}).

Note that this applies to all frames created, not just the initial
one.

@item @code{iconName} (class @code{Title})
Name to display in the icon.

@item @code{internalBorder} (class @code{BorderWidth})
Width in pixels of the internal border.

@item @code{lineSpacing} (class @code{LineSpacing})
@cindex line spacing
@cindex leading
Additional space (@dfn{leading}) between lines, in pixels.

@item @code{menuBar} (class @code{MenuBar})
Give frames menu bars if @samp{on}; don't have menu bars if
@samp{off}.  @xref{Lucid Resources}, and @ref{LessTif Resources}, for
how to control the appearance of the menu bar if you have one.

@item @code{minibuffer} (class @code{Minibuffer})
If @samp{none}, don't make a minibuffer in this frame.
It will use a separate minibuffer frame instead.

@item @code{paneFont} (class @code{Font})
@cindex font for menus
Font name for menu pane titles, in non-toolkit versions of Emacs.

@item @code{pointerColor} (class @code{Foreground})
Color of the mouse cursor.

@item @code{privateColormap} (class @code{PrivateColormap})
If @samp{on}, use a private color map, in the case where the ``default
visual'' of class PseudoColor and Emacs is using it.

@item @code{reverseVideo} (class @code{ReverseVideo})
Switch foreground and background default colors if @samp{on}, use colors as
specified if @samp{off}.

@item @code{screenGamma} (class @code{ScreenGamma})
@cindex gamma correction
Gamma correction for colors, equivalent to the frame parameter
@code{screen-gamma}.

@item @code{selectionFont} (class @code{SelectionFont})
Font name for pop-up menu items, in non-toolkit versions of Emacs.  (For
toolkit versions, see @ref{Lucid Resources}, also see @ref{LessTif
Resources}.)

@item @code{selectionTimeout} (class @code{SelectionTimeout})
Number of milliseconds to wait for a selection reply.
If the selection owner doesn't reply in this time, we give up.
A value of 0 means wait as long as necessary.

@item @code{synchronous} (class @code{Synchronous})
@cindex debugging X problems
@cindex synchronous X mode
Run Emacs in synchronous mode if @samp{on}.  Synchronous mode is
useful for debugging X problems.

@item @code{title} (class @code{Title})
Name to display in the title bar of the initial Emacs frame.

@item @code{toolBar} (class @code{ToolBar})
Number of lines to reserve for the tool bar.  A zero value suppresses
the tool bar.  If the value is non-zero and
@code{auto-resize-tool-bars} is non-@code{nil}, the tool bar's size
will be changed automatically so that all tool bar items are visible.

@item @code{verticalScrollBars} (class @code{ScrollBars})
Give frames scroll bars if @samp{on}; don't have scroll bars if
@samp{off}.
@end table

@node Face Resources
@appendixsec X Resources for Faces

  You can also use resources to customize the appearance of particular
faces (@pxref{Faces}):

@table @code
@item @var{face}.attributeFont
Font for face @var{face}.
@item @var{face}.attributeForeground
Foreground color for face @var{face}.
@item @var{face}.attributeBackground
Background color for face @var{face}.
@item @var{face}.attributeUnderline
Underline flag for face @var{face}.  Use @samp{on} or @samp{true} for
yes.
@item @var{face}.attributeFamily
Font family for face @var{face}.
@item @var{face}.attributeWidth
Relative proportional width of the font to use for face @var{face}.
It should be one of @code{ultra-condensed}, @code{extra-condensed},
@code{condensed}, @code{semi-condensed}, @code{normal},
@code{semi-expanded}, @code{expanded}, @code{extra-expanded}, or
@code{ultra-expanded}.
@item @var{face}.attributeHeight
Height of the font to use for face @var{face}: either an integer
specifying the height in units of 1/10@dmn{pt}, or a floating point
number that specifies a scale factor to scale the underlying face's
default font, or a function to be called with the default height which
will return a new height.
@item @var{face}.attributeWeight
A weight to use for the face @var{face}.  It must be one of
@code{ultra-bold}, @code{extra-bold}, @code{bold},
@code{semi-bold}, @code{normal}, @code{semi-light}, @code{light},
@code{extra-light}, @code{ultra-light}.
@item @var{face}.attributeSlant
The slant to use for the font of face @var{face}.  It must be one of
@code{italic}, @code{oblique}, @code{normal},
@code{reverse-italic}, or @code{reverse-oblique}.
@item @var{face}.attributeStrikeThrough
Whether the face @var{face} should be drawn with a line striking
through the characters.
@item @var{face}.attributeOverline
Whether the characters in the face @var{face} should be overlined.
@item @var{face}.attributeBox
Whether to draw a box around the characters in face @var{face}.
@item @var{face}.attributeInverse
Whether to display the characters in face @var{face} in inverse
video.
@item @var{face}.attributeStipple
The name of a pixmap data file to use for the stipple pattern, or
@code{false} to not use stipple for the face @var{face}.
@item @var{face}.attributeBackgroundPixmap
The background pixmap for the face @var{face}.  Should be a name of a
pixmap file or @code{false}.
@item @var{face}.attributeBold
Whether to draw the characters in the face @var{face} as bold.
@item @var{face}.attributeItalic
Whether to draw the characters in the face @var{face} as italic.
@end table

@node Lucid Resources
@appendixsec Lucid Menu X Resources
@cindex Menu X Resources (Lucid widgets)
@cindex Lucid Widget X Resources

  If the Emacs installed at your site was built to use the X toolkit
with the Lucid menu widgets, then the menu bar is a separate widget and
has its own resources.  The resource names contain @samp{pane.menubar}
(following, as always, the name of the Emacs invocation, or @samp{Emacs},
which stands for all Emacs invocations).  Specify them like this:

@example
Emacs.pane.menubar.@var{resource}:  @var{value}
@end example

@noindent
For example, to specify the font @samp{8x16} for the menu-bar items,
write this:

@example
Emacs.pane.menubar.font:  8x16
@end example

@noindent
Resources for @emph{non-menubar} toolkit pop-up menus have
@samp{menu*}, in like fashion.  For example, to specify the font
@samp{8x16} for the pop-up menu items, write this:

@example
Emacs.menu*.font:	8x16
@end example

@noindent
For dialog boxes, use @samp{dialog} instead of @samp{menu}:

@example
Emacs.dialog*.font:	8x16
@end example

@noindent
Experience shows that on some systems you may need to add
@samp{shell.}@: before the @samp{pane.menubar} or @samp{menu*}.  On
some other systems, you must not add @samp{shell.}.

  Here is a list of the specific resources for menu bars and pop-up menus:

@table @code
@item font
Font for menu item text.
@item foreground
Color of the foreground.
@item background
Color of the background.
@item buttonForeground
In the menu bar, the color of the foreground for a selected item.
@item horizontalSpacing
Horizontal spacing in pixels between items.  Default is 3.
@item verticalSpacing
Vertical spacing in pixels between items.  Default is 1.
@item arrowSpacing
Horizontal spacing between the arrow (which indicates a submenu) and
the associated text.  Default is 10.
@item shadowThickness
Thickness of shadow line around the widget.
@item margin
The margin of the menu bar, in characters.  The default of 4 makes the
menu bar appear like the LessTif/Motif one.
@end table

@node LessTif Resources
@appendixsec LessTif Menu X Resources
@cindex Menu X Resources (LessTif widgets)
@cindex LessTif Widget X Resources

  If the Emacs installed at your site was built to use the X toolkit
with the LessTif or Motif widgets, then the menu bar, the dialog
boxes, the pop-up menus, and the file-selection box are separate
widgets and have their own resources.

  The resource names for the menu bar contain @samp{pane.menubar}
(following, as always, the name of the Emacs invocation, or
@samp{Emacs}, which stands for all Emacs invocations).  Specify them
like this:

@smallexample
Emacs.pane.menubar.@var{subwidget}.@var{resource}:  @var{value}
@end smallexample

  Each individual string in the menu bar is a subwidget; the subwidget's
name is the same as the menu item string.  For example, the word
@samp{File} in the menu bar is part of a subwidget named
@samp{emacs.pane.menubar.File}.  Most likely, you want to specify the
same resources for the whole menu bar.  To do this, use @samp{*} instead
of a specific subwidget name.  For example, to specify the font
@samp{8x16} for the menu-bar items, write this:

@smallexample
Emacs.pane.menubar.*.fontList:  8x16
@end smallexample

@noindent
This also specifies the resource value for submenus.

  Each item in a submenu in the menu bar also has its own name for X
resources; for example, the @samp{File} submenu has an item named
@samp{Save (current buffer)}.  A resource specification for a submenu
item looks like this:

@smallexample
Emacs.pane.menubar.popup_*.@var{menu}.@var{item}.@var{resource}: @var{value}
@end smallexample

@noindent
For example, here's how to specify the font for the @samp{Save (current
buffer)} item:

@smallexample
Emacs.pane.menubar.popup_*.File.Save (current buffer).fontList: 8x16
@end smallexample

@noindent
For an item in a second-level submenu, such as @samp{Complete Word}
under @samp{Spell Checking} under @samp{Tools}, the resource fits this
template:

@smallexample
Emacs.pane.menubar.popup_*.popup_*.@var{menu}.@var{resource}: @var{value}
@end smallexample

@noindent
For example,

@smallexample
Emacs.pane.menubar.popup_*.popup_*.Spell Checking.Complete Word: @var{value}
@end smallexample

@noindent
(This should be one long line.)

  It's impossible to specify a resource for all the menu-bar items
without also specifying it for the submenus as well.  So if you want the
submenu items to look different from the menu bar itself, you must ask
for that in two steps.  First, specify the resource for all of them;
then, override the value for submenus alone.  Here is an example:

@smallexample
Emacs.pane.menubar.*.fontList:  8x16
Emacs.pane.menubar.popup_*.fontList: 8x16
@end smallexample

@noindent
For LessTif pop-up menus, use @samp{menu*} instead of
@samp{pane.menubar}.  For example, to specify the font @samp{8x16} for
the pop-up menu items, write this:

@smallexample
Emacs.menu*.fontList:  8x16
@end smallexample

@noindent
For LessTif dialog boxes, use @samp{dialog} instead of @samp{menu}:

@example
Emacs.dialog*.fontList: 8x16
Emacs.dialog*.foreground: hotpink
@end example

To specify resources for the LessTif file-selection box, use
@samp{fsb*}, like this:

@example
Emacs.fsb*.fontList: 8x16
@end example

@iftex
@medbreak
@end iftex
  Here is a list of the specific resources for LessTif menu bars and
pop-up menus:

@table @code
@item armColor
The color to show in an armed button.
@item fontList
The font to use.
@item marginBottom
@itemx marginHeight
@itemx marginLeft
@itemx marginRight
@itemx marginTop
@itemx marginWidth
Amount of space to leave around the item, within the border.
@item borderWidth
The width of the border around the menu item, on all sides.
@item shadowThickness
The width of the border shadow.
@item bottomShadowColor
The color for the border shadow, on the bottom and the right.
@item topShadowColor
The color for the border shadow, on the top and the left.
@end table


@node GTK resources
@appendixsec GTK resources
@cindex GTK resources and customization
@cindex resource files for GTK
@cindex @file{~/.gtkrc-2.0} file
@cindex @file{~/.emacs.d/gtkrc} file

  If the Emacs installed at your site was built to use the GTK widget set,
then the menu bar, scroll bar and the dialogs can be customized with
the standard GTK @file{~/.gtkrc-2.0} file or with the Emacs specific
@file{~/.emacs.d/gtkrc} file; note that these files are only for
customizing specific GTK widget features.  To customize Emacs font,
background, faces etc., use the normal X resources, see @ref{Resources}.

In these files you first defines a style and then how to apply that style
to widgets (@pxref{GTK widget names}).  Here is an example of how to
change the font for Emacs menus:

@smallexample
# This is a comment.
style "menufont"
@{
  font_name = "helvetica bold 14"  # This is a Pango font name
@}

widget "*emacs-menuitem*" style "menufont"

@end smallexample

  There are some things you can set without using any style or widget name,
which affect GTK as a whole.  Most of these are poorly documented, but can
be found in the `Properties' section of the documentation page for
@code{GtkSetting}, in the GTK document references below.

One property of interest is @code{gtk-font-name} which sets the default
font for GTK; you must use Pango font names (@pxref{GTK styles}).  A
@file{~/.gtkrc-2.0} file that just sets a default font looks like this:

@smallexample
gtk-font-name = "courier 12"
@end smallexample


  If GTK at your site is installed under @var{prefix},
the resource file syntax is fully described in the GTK API
document
@file{@var{prefix}/share/gtk-doc/html/gtk/gtk-resource-files.html}.
@var{prefix} is usually @file{/usr} or @file{/usr/local}.
You can find the same document online at
@uref{http://developer.gnome.org/doc/API/2.0/gtk/gtk-Resource-Files.html}.


@menu
* GTK widget names::      How widgets in GTK are named in general.
* GTK names in Emacs::    GTK widget names in Emacs.
* GTK styles::            What can be customized in a GTK widget.
@end menu


@node GTK widget names
@appendixsubsec GTK widget names
@cindex GTK widget names

  Widgets are specified by widget class or by widget name.
The widget class is the type of the widget, for example @code{GtkMenuBar}.
The widget name is the name given to a specific widget within a program.
A widget always have a class but it is not mandatory to give a name to
a widget.  Absolute names are sequences of widget names or
widget classes, corresponding to hierarchies of widgets embedded within
other widgets.  For example, if a @code{GtkWindow} contains a @code{GtkVBox}
which in turn contains a @code{GtkMenuBar}, the absolute class name
is @code{GtkWindow.GtkVBox.GtkMenuBar}.

@noindent
If the widgets are named ``top'', ``box'' and ``menubar'', the absolute
widget name is @code{top.box.menubar},

  When assigning a style to a widget, you can use the absolute class
name or the absolute widget name.
There are two commands:  @code{widget_class} will assign a style to
widgets, matching only against the absolute class name.
The command @code{widget} will match the absolute widget name,
but if there is no name for a widget in the hierarchy, the class is matched.
These commands require the absolute name and the style name to be
within  double quotes.  These commands are written at the top level in a
@file{~/.gtkrc-2.0} file, like this:

@smallexample
style "menufont"
@{
  font_name = "helvetica bold 14"
@}

widget "top.box.menubar" style "menufont"
widget_class "GtkWindow.GtkVBox.GtkMenuBar" style "menufont"
@end smallexample


  Matching of absolute names is done with shell ``glob'' syntax, that is
@samp{*} matches zero or more characters and @samp{?} matches one character.
So the following would assign @code{base_style} to all widgets:

@smallexample
widget "*" style "base_style"
@end smallexample

  Given the absolute class name @code{GtkWindow.GtkVBox.GtkMenuBar}
and the corresponding absolute widget name @code{top.box.menubar},
the following all assign @code{my_style} to the menu bar:

@smallexample
widget_class "GtkWindow.GtkVBox.GtkMenuBar" style "my_style"
widget_class "GtkWindow.*.GtkMenuBar" style "my_style"
widget_class "*GtkMenuBar" style "my_style"
widget "top.box.menubar" style "my_style"
widget "*box*menubar" style "my_style"
widget "*menubar" style "my_style"
widget "*menu*" style "my_style"
@end smallexample

@node GTK names in Emacs
@appendixsubsec GTK names in Emacs
@cindex GTK widget names
@cindex GTK widget classes

  In Emacs the top level widget for a frame is a @code{GtkWindow} that
contains a @code{GtkVBox}.  The @code{GtkVBox} contains the
@code{GtkMenuBar} and a @code{GtkFixed} widget.
The vertical scroll bars, @code{GtkVScrollbar},
are contained in the @code{GtkFixed} widget.
The text you write in Emacs is drawn in the @code{GtkFixed} widget.

  Dialogs in Emacs are @code{GtkDialog} widgets.  The file dialog is a
@code{GtkFileSelection} widget.

@noindent
To set a style for the menu bar using the absolute class name, use:

@smallexample
widget_class "GtkWindow.GtkVBox.GtkMenuBar" style "my_style"
@end smallexample

@noindent
For the scroll bar, the absolute class name is:

@smallexample
widget_class
  "GtkWindow.GtkVBox.GtkFixed.GtkVScrollbar"
     style "my_style"
@end smallexample

@noindent
The names for the emacs widgets, and their classes, are:

@multitable {@code{verticalScrollbar plus}} {@code{GtkFileSelection} and some}
@item @code{emacs-filedialog}
@tab @code{GtkFileSelection}
@item @code{emacs-dialog}
@tab @code{GtkDialog}
@item @code{Emacs}
@tab @code{GtkWindow}
@item @code{pane}
@tab @code{GtkVHbox}
@item @code{emacs}
@tab @code{GtkFixed}
@item @code{verticalScrollbar}
@tab @code{GtkVScrollbar}
@item @code{emacs-toolbar}
@tab @code{GtkToolbar}
@item @code{menubar}
@tab @code{GtkMenuBar}
@item @code{emacs-menuitem}
@tab anything in menus
@end multitable

@noindent
Thus, for Emacs you can write the two examples above as:

@smallexample
widget "Emacs.pane.menubar" style "my_style"
widget "Emacs.pane.emacs.verticalScrollbar" style "my_style"
@end smallexample

  GTK absolute names are quite strange when it comes to menus
and dialogs.  The names do not start with @samp{Emacs}, as they are
free-standing windows and not contained (in the GTK sense) by the
Emacs GtkWindow.  To customize the dialogs and menus, use wildcards like this:

@smallexample
widget "*emacs-dialog*" style "my_dialog_style"
widget "*emacs-filedialog* style "my_file_style"
widget "*emacs-menuitem* style "my_menu_style"
@end smallexample

  An alternative is to put customization into @file{~/.emacs.d/gtkrc}.
This file is only read by Emacs, so anything in @file{~/.emacs.d/gtkrc}
affects Emacs but leaves other applications unaffected.
For example, the drop down menu in the file dialog can not
be customized by any absolute widget name, only by an absolute
class name.  This is so because the widgets in the drop down menu does not
have names and the menu is not contained in the Emacs GtkWindow.
To have all menus in Emacs look the same, use this in @file{~/.emacs.d/gtkrc}:

@smallexample
widget_class "*Menu*" style "my_menu_style"
@end smallexample

@node GTK styles
@appendixsubsec GTK styles
@cindex GTK styles

  In a GTK style you specify the appearance widgets shall have.  You
can specify foreground and background color, background pixmap and font.
The edit widget (where you edit the text) in Emacs is a GTK widget,
but trying to specify a style for the edit widget will have no effect.
This is so that Emacs compiled for GTK is compatible with Emacs compiled
for other X toolkits.  The settings for foreground, background and font
for the edit widget is taken from the X resources; @pxref{Resources}.
Here is an example of two style declarations, ``default'' and ``ruler'':

@smallexample

pixmap_path "/usr/share/pixmaps:/usr/include/X11/pixmaps"

style "default"
@{
  font_name = "helvetica 12"

  bg[NORMAL] = @{ 0.83, 0.80, 0.73 @}
  bg[SELECTED] = @{ 0.0, 0.55, 0.55 @}
  bg[INSENSITIVE] = @{ 0.77, 0.77, 0.66 @}
  bg[ACTIVE] = @{ 0.0, 0.55, 0.55 @}
  bg[PRELIGHT] = @{ 0.0, 0.55, 0.55 @}

  fg[NORMAL] = "black"
  fg[SELECTED] = @{ 0.9, 0.9, 0.9 @}
  fg[ACTIVE] = "black"
  fg[PRELIGHT] = @{ 0.9, 0.9, 0.9 @}

  base[INSENSITIVE] = "#777766"
  text[INSENSITIVE] = @{ 0.60, 0.65, 0.57 @}

  bg_pixmap[NORMAL] = "background.xpm"
  bg_pixmap[INSENSITIVE] = "background.xpm"
  bg_pixmap[ACTIVE] = "background.xpm"
  bg_pixmap[PRELIGHT] = "<none>"

@}

style "ruler" = "default"
@{
  font_name = "helvetica 8"
@}

@end smallexample

  The style ``ruler'' inherits from ``default''.  This way you can build
on existing styles.  The syntax for fonts and colors is described below.

  As this example shows, it is possible to specify several values
for foreground and background depending on which state the widget has.
The possible states are
@table @code
@item NORMAL
This is the default state for widgets.
@item ACTIVE
This is the state for a widget that is ready to do something.  It is
also for the trough of a scroll bar, i.e.  @code{bg[ACTIVE] = "red"}
sets the scroll bar trough to red.  Buttons that have been pressed but
not released yet (``armed'') are in this state.
@item PRELIGHT
This is the state when widgets that can be manipulated have the mouse
pointer over them.  For example when the mouse is over the thumb in the
scroll bar or over a menu item.  When the mouse is over a button that
is not pressed, the button is in this state.
@item SELECTED
This is the state when some data has been selected by the user.  It can
be selected text or items selected in a list.
There is no place in Emacs where this setting has any effect.
@item INSENSITIVE
This is the state for widgets that are visible, but they can not be
manipulated like they normally can.  For example, buttons that can't be
pressed and menu items that can't be selected.
Text for menu items that are not available can be set to yellow with
@code{fg[INSENSITIVE] = "yellow"}.
@end table

Here are the things that can go in a style declaration:

@table @code
@item bg[@var{state}] = @var{color}
This is the background color widgets use.  This background is not used for
editable text, use @code{base} for that.

@item base[@var{state}] = @var{color}
This is the background color for editable text.
In Emacs, this color is used for the background of the text fields in the
file dialog.

@item bg_pixmap[@var{state}] = "@var{pixmap}"
You can specify a pixmap to be used instead of the background color.
@var{pixmap} is a file name.  GTK can use a number of file formats,
including XPM, XBM, GIF, JPEG and PNG.  If you want a widget to use the same
pixmap as its parent, use @samp{<parent>}.  If you don't want any
pixmap use @samp{<none>}.  Using @samp{<none>} can be useful
if your style inherits a style that does specify a pixmap.

  GTK looks for the pixmap in directories specified in @code{pixmap_path}.
It is not possible to refer to a file by its absolute path name.
@code{pixmap_path} is a colon-separated list of directories within double
quotes, specified at the top level in a @file{gtkrc} file (i.e. not inside
a style definition; see example above):

@smallexample
pixmap_path "/usr/share/pixmaps:/usr/include/X11/pixmaps"
@end smallexample

@item fg[@var{state}] = @var{color}
This is the foreground color widgets use.  This is the color
of text in menus and buttons.  It is also the color for the arrows in the
scroll bar.  For editable text, use @code{text}.

@item text[@var{state}] = @var{color}
This is the color for editable text.  In Emacs, this color is used for the
text fields in the file dialog.

@item font_name = "@var{font}"
This is the font a widget shall use.  @var{font} is a Pango font name,
for example ``Sans Italic 10'', ``Helvetica Bold 12'', ``Courier 14'',
``Times 18''.  See below for exact syntax.  The names are case insensitive.
@end table

  Colors are specified in three ways, a name, a hexadecimal form or
an RGB triplet.

@noindent
A color name is written within double quotes, for example @code{"red"}.

@noindent
A hexadecimal form is written within double quotes.  There are four forms,
@code{#rrrrggggbbbb}, @code{#rrrgggbbb},
@code{#rrggbb}, or @code{#rgb}.  In each of these r, g and b are hex digits.

@noindent
An RGB triplet looks like @code{@{ r, g, b @}}, where r, g and b are either
integers in the range 0-65535 or floats in the range 0.0-1.0.

  Pango font names have the form ``@var{family-list} @var{style-options}
@var{size}''.
@cindex Pango font name
@noindent
@var{family-list} is a comma separated list of font families optionally
terminated by a comma.  This way you can specify several families and the
first one found will be used.  @var{family} corresponds to the second part in
an X font name, for example in

@smallexample
-adobe-times-medium-r-normal--12-120-75-75-p-64-iso10646-1
@end smallexample

@noindent
the family name is ``times''.

@noindent
@var{style-options} is a whitespace separated list of words where each word
is a style, variant, weight, or stretch.  The default value for all of
these is @code{normal}.

@noindent
A `style' corresponds to the fourth part of an X font name.  In X font
names it is the character ``r'', ``i'' or ``o''; in Pango font names the
corresponding values are @code{normal}, @code{italic}, or @code{oblique}.

@noindent
A `variant' is either @code{normal} or @code{small-caps}.
Small caps is a font with the lower case characters replaced by
smaller variants of the capital characters.

@noindent
Weight describes the ``boldness'' of a font.  It corresponds to the third
part of an X font name.  It is one of @code{ultra-light}, @code{light},
@code{normal}, @code{bold}, @code{ultra-bold}, or @code{heavy}.

@noindent
Stretch gives the width of the font relative to other designs within a
family.  It corresponds to the fifth part of an X font name.  It is one of
@code{ultra-condensed}, @code{extra-condensed}, @code{condensed},
@code{semi-condensed}, @code{normal}, @code{semi-expanded},
@code{expanded}, @code{extra-expanded}, or @code{ultra-expanded}.

@noindent
@var{size} is a decimal number that describes the font size in points.