@c -*-texinfo-*-
@c This is part of the GNU Emacs Lisp Reference Manual.
-@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1998, 1999
+@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1998, 1999, 2000
@c Free Software Foundation, Inc.
@c See the file elisp.texi for copying conditions.
@setfilename ../info/keymaps
@end example
If you specify @var{prompt}, that becomes the overall prompt string for
-the keymap. The prompt string is useful for menu keymaps
+the keymap. The prompt string should be provided for menu keymaps
(@pxref{Defining Menus}).
@end defun
as a variable instead.
If @var{prompt} is non-@code{nil}, that becomes the overall prompt
-string for the keymap. The prompt string is useful for menu keymaps
+string for the keymap. The prompt string should be given for menu keymaps
(@pxref{Defining Menus}).
@end defun
string}, which is a string that appears as an element of the keymap.
(@xref{Format of Keymaps}.) The string should describe the purpose of
the menu's commands. Emacs displays the overall prompt string as the
-menu title in some cases, depending on which toolkit is used for
-displaying menus. Keyboard menus also display the overall prompt
-string.
+menu title in some cases, depending on the toolkit (if any) used for
+displaying menus.@footnote{It is required for menus which do not use a
+toolkit, e.g.@: under MS-DOS.} Keyboard menus also display the overall
+prompt string.
The easiest way to construct a keymap with a prompt string is to specify
-the string as an argument when you call @code{make-keymap} or
-@code{make-sparse-keymap} (@pxref{Creating Keymaps}).
+the string as an argument when you call @code{make-keymap},
+@code{make-sparse-keymap} or @code{define-prefix-command}
+(@pxref{Creating Keymaps}).
The order of items in the menu is the same as the order of bindings in
the keymap. Since @code{define-key} puts new bindings at the front, you
You can also supply a second string, called the help string, as follows:
@example
-(@var{item-string} @var{help-string} . @var{real-binding})
+(@var{item-string} @var{help} . @var{real-binding})
@end example
-Currently Emacs does not actually use @var{help-string}; it knows only
-how to ignore @var{help-string} in order to extract @var{real-binding}.
-In the future we may use @var{help-string} as extended documentation for
-the menu item, available on request.
+@var{help} specifies a ``help-echo'' string to display while the mouse
+is on that item in the same way as @code{help-echo} text properties
+(@pxref{Help display}).
As far as @code{define-key} is concerned, @var{item-string} and
@var{help-string} are part of the event's binding. However,
not defined at all.
@item :help @var{help}
-The value of this property, @var{help}, is the extra help string (not
-currently used by Emacs).
+The value of this property, @var{help}, specifies a ``help-echo'' string
+to display while the mouse is on that item. This is displayed in the
+same way as @code{help-echo} text properties (@pxref{Help display}).
+Note that this must be a constant string, unlike the @code{help-echo}
+property for text and overlays.
@item :button (@var{type} . @var{selected})
This property provides a way to define radio buttons and toggle buttons.
in the item must be a command, not a keymap; in other words, it does not
work to define a tool bar icon as a prefix key.
- The @code{:help} property is meaningful, and specifies a ``help-echo''
-string to display while the mouse is on that item.
+ The @code{:help} property specifies a ``help-echo'' string to display
+while the mouse is on that item. This is displayed in the same way as
+@code{help-echo} text properties (@pxref{Help display}).
In addition, you should use the @code{:image} property;
this is how you specify the image to display in the tool bar:
button in disabled state by applying an edge-detection algorithm to the
image.
+The default tool bar is defined so that items specific to editing do not
+appear for major modes whose command symbol has a @code{mode-class}
+property of @code{special} (@pxref{Major Mode Conventions}). Major
+modes may add items to the global bar by binding @code{[tool-bar
+@var{foo}]} in their local map. It makes sense for some major modes to
+replace the default tool bar items completely, since not many can be
+accommodated conveniently, and the default bindings make this easy by
+using an indirection through @code{tool-bar-map}.
+
+@defvar tool-bar-map
+@tindex tool-bar-map
+By default, the global map binds @code{[tool-bar]} as follows:
+@example
+(global-set-key [tool-bar]
+ '(menu-item "tool bar" ignore
+ :filter (lambda (ignore) tool-bar-map)))
+@end example
+@noindent
+Thus the tool bar map is derived dynamically from the value of variable
+@code{tool-bar-map} and you should normally adjust the default (global)
+tool bar by changing that map. Major modes may replace the global bar
+completely by making @code{tool-bar-map} buffer-local and set to a
+keymap containing only the desired items. Info mode provides an
+example.
+@end defvar
+
+There are two convenience functions for defining tool bar items, as
+follows.
+
+@defun tool-bar-add-item icon def key &rest props
+@tindex tool-bar-add-item
+This function adds an item to the tool bar by modifying
+@code{tool-bar-map}. The image to use is defined by @var{icon}, which
+is the base name of an XPM, XBM or PBM image file to located by
+@code{find-image}. Given a value @samp{"exit"}, say, @file{exit.xpm},
+@file{exit.pbm} and @file{exit.xbm} would be searched for in that order
+on a color display. On a monochrome display, the search order is
+@samp{.pbm}, @samp{.xbm} and @samp{.xpm}. The binding to use is the
+command @var{def}, and @var{key} is the fake function key symbol in the
+prefix keymap. The remaining arguments @var{props} are additional
+property list elements to add to the menu item specification.
+
+To define items in some local map, bind @code{`tool-bar-map} with
+@code{let} around calls of this function:
+@example
+(defvar foo-tool-bar-map
+ (let ((tool-bar-map (make-sparse-keymap)))
+ (tool-bar-add-item @dots{})
+ @dots{}
+ tool-bar-map))
+@end example
+@end defun
+
+@defun tool-bar-add-item-from-menu command icon &optional map &rest props
+@tindex tool-bar-add-item-from-menu
+This command is a convenience for defining tool bar items which are
+consistent with existing menu bar bindings. The binding of
+@var{command} is looked up in the menu bar in @var{map} (default
+@code{global-map}) and modified to add an image specification for
+@var{icon}, which is looked for in the same way as by
+@code{tool-bar-add-item}. The resulting binding is then placed in
+@code{tool-bar-map}. @var{map} must contain an appropriate keymap bound
+to @code{[menu-bar]}. The remaining arguments @var{props} are
+additional property list elements to add to the menu item specification.
+@end defun
+
@tindex auto-resize-tool-bar
@defvar auto-resize-tool-bar
If this variable is non-@code{nil}, the tool bar automatically resizes to
HCoop / bpt / emacs.git / blobdiff