2295 lines
87 KiB
Text
2295 lines
87 KiB
Text
\input texinfo @c -*-texinfo-*-
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%
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% doc.gpm - main file for the documentation
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%
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% Copyright 1994,1995,1998 rubini@linux.it (Alessandro Rubini)
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% Copyright (C) 1998 Ian Zimmerman <itz@speakeasy.org>
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% Copyright (C) 2001-2008 Nico Schottelius <nico-gpm2008 at schottelius.org>
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%
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%%%%
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%------------------------------------------------------------------------------
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%
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% NOTE FOR THE UNAWARE USER
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% =========================
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%
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% This file is a texinfo source. It isn't the binary file of some strange
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% editor of mine. If you want ASCII, you should "make gpm.txt".
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%
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% Some strings maybe changed from the configure script.
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%
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%------------------------------------------------------------------------------
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%
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% This is not a conventional info file...
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% I use two extra features:
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% - The '%' as a comment marker ("\%" -> "%")
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% - leading blanks are allowed (and removed)
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%
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@comment %**start of header
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@setfilename gpm.info
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@settitle gpm @value{version}
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@iftex
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@afourpaper
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@end iftex
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@comment %**end of header
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@ifinfo
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@format
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@dircategory Miscellaneous
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@direntry
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* Gpm: (gpm). A server wich hands mouse events to non-X programs.
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@end direntry
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@end format
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@end ifinfo
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@setchapternewpage off
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@set version @release@
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@set update-month @release_date@
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@finalout
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@ifinfo
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%ASCII_BEGIN
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This file is a user's and programmer's manual for gpm @value{version}.
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Copyright (C) 1994,1995,1998 Alessandro Rubini
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Copyright (C) 2001-2008 Nico Schottelius
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Permission is granted to make and distribute verbatim copies of
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this manual provided the copyright notice and this permission notice
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are preserved on all copies.
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@ignore
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Permission is granted to process this file through TeX and print the
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results, provided the printed document carries copying permission
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notice identical to this one except for the removal of this paragraph
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(this paragraph not being relevant to the printed manual).
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@end ignore
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Permission is granted to copy and distribute modified versions of this
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manual under the conditions for verbatim copying, provided that the entire
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resulting derived work is distributed under the terms of a permission
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notice identical to this one.
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Permission is granted to copy and distribute translations of this manual
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into another language, under the above conditions for modified versions,
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except that this permission notice may be stated in a translation approved
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by the Free Software Foundation.
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@end ifinfo
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@setchapternewpage odd
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@titlepage
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@c use the new format for titles
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@title gpm @value{version}
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@subtitle A general purpose mouse server for the Linux console
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@subtitle @value{update-month}
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@author by Nico Schottelius <nico@@schottelius.org>
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@end titlepage
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@setchapternewpage off
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@headings single
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@ifinfo
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This file documents the @value{version} release of the "General Purpose
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Mouse" (gpm) server for the Linux text console (@value{update-month}).
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@node Top, Overview, (dir), (dir)
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@top gpm
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@menu
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* Overview::
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* Server Invocation::
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* Gpm Internals::
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* The ClientLib::
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* Demo Clients::
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* Type Index::
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* Function Index::
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* Variable Index::
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@end menu
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@end ifinfo
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%##########################################################################
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%##########################################################################
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@node Overview, Server Invocation, Top, Top
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@chapter Overview
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@cindex Overview of Gpm
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@cindex Gpm Overview
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The @dfn{gpm} package is a mouse server for the Linux console. It is
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meant to provide cooked mouse events to text-only applications, such as
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editors and simple menu-based apps. The daemon is also able to repeat
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packets in "msc" format to a graphic application. This last feature is
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meant to override the single-open problem of busmice. The roots of
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@code{gpm} come from the @file{selection-1.5} package, by Andrew Haylett.
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The first application to support the mouse has been The Midnight Commander,
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by Miguel de Icaza. @file{mc-0.11} and later releases offer
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mouse support if you have the mouse server running on your system.
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The file @file{t-mouse.el} provides support for using the
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mouse from within Emacs. @xref{Emacs Support}.
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As of release 0.96, a default-handler is released with gpm, and can be
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used to handle Control-Mouse events to draw menus on the screen.
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The @code{gpm-root} program, however, needs kernel 1.1.73 or newer.
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@xref{gpm-root}.
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Release 1.00 has been an incompatible one (is is incompatible with
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releases older than 0.97), but is compatible with the kernel-level mouse
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driver (available as @file{kmouse-?.??.tar.gz} from the mirrors of
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@uref{ftp://tsx-11.mit.edu}. With 1.0 the high level library is available,
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together with a demonstration/test program. A small utility to help in
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detecting your mouse-type is also included.
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As of release 1.20.0 the default device is removed. Now -m is a must.
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Release 1.20.1 introduces the must for -t and a specific way to use -m,-t,-o:
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Now you've got to use -m first, then -t and at last -o.
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This seems to be more complex, but makes using of multiply mice possible with
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clean code.
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@menu
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* Building the Release::
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@end menu
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%=========================================================================
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@node Building the Release, , Overview, Overview
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@section Compiling and Installing
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@cindex Building Gpm
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Just say @code{./configure && make && make install} to your
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shell. You'll need gpm installed to compile the latest release of
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The Midnight Commander with mouse support enabled.
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Binaries are not released with the package because it's safer for you to
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compile the package by yourself.
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%=========================================================================
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%@node Kernel Patches
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%@section Kernel Patches
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%@cindex Kernel Patches
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%@cindex Patches to Apply
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%
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%Old Linux kernels need to be patched to provide features I rely on. As
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%of 1.1.32, however, my patches are in the official release, so you won't
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%need any kernel recompilation. Remember, anyway, to enable selection while
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%compiling the kernel, or this package won't work. Refer to
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%@file{kernel/README} to probe further.
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%
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%Other features are needed to run the @t{gpm-root} client. They are
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%really functional only since 1.1.73. 1.1.68, however, should be sufficient.
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%
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%##########################################################################
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@node Server Invocation, Gpm Internals, Overview, Top
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@chapter Server Invocation
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@cindex The Server
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@cindex Command Line (gpm)
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%MANPAGE gpm.8
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%M .TH GPM 8 "February 2002"
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%M .UC 4
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%M .SH NAME
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%M gpm \- a cut and paste utility and mouse server for virtual consoles
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%M .SH SYNOPSIS
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%M .B gpm
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%M [
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%M .I options
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%M ]
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%M .br
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%M .SH DESCRIPTION
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%M This package tries to be a useful
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%M mouse server for applications running on the Linux console. It is
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%M based on the "selection" package, and some of its code
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%M comes from selection itself. This package is intended as a replacement
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%M for "selection" as a cut-and-paste mechanism; it also provides
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%M additional facilities. The "selection"
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%M package offered the first cut-and-paste implementation for Linux using
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%M two mouse buttons, and the cut buffer is still called "selection buffer"
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%M or just "selection" throughout this document.
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%M
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%M The information below is extracted from the texinfo file, which is the
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%M preferred source of information.
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The @code{gpm} executable is meant to act like a daemon (thus, @code{gpmd}
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would be a better name for it). This section is meant to describe the
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command-line options for @code{gpm}, while its internals are outlined in
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the next section.
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@xref{Gpm Internals}.
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Due to restrictions in the @code{ioctl(TIOCLINUX)} system call, @code{gpm} must
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be run by the superuser. The restrictions have been added in the last 1.1
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kernels to fix a security hole related to selection and screen dumping.
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The server can be configured to match the user's taste, and any
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application using the mouse will inherit the server's
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attitude. From release 1.02 up to 1.19.2 is was possible
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for any user logged on the system console to change the mouse @emph{feeling}
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using the @t{-q} option. This is no longer possible for security
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reasons.
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As of 0.97 the server program puts itself in the background. To kill
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@code{gpm} you can just reinvoke it with the @samp{-k} cmdline switch,
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although @code{killall gpm} can be a better choice.
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@menu
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* Special Commands::
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* Command Line::
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* Bugs and Problems::
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* Mouse Types::
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@end menu
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%M .SH SPECIAL COMMANDS
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%==========================================================================
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@node Special Commands, Command Line, Server Invocation, Server Invocation
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@section Special Commands
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Version 1.10 adds the capability to execute @emph{special} commands on
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certain circumstances. Special commands default to rebooting and halting
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the system, but the user can specify his/her personal choice. The
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capability to invoke commands using the mouse is a handy one for
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programmers, because it allows to issue a clean shutdown when the
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keyboard is locked and no network is available to restore the system to
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a sane state.
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Special commands are toggled by triple-clicking the left and right button --
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an unlikely event during normal mouse usage. The easiest way to triple-click
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is pressing one of the buttons and triple-click the other one. When special
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processing is toggled, a message appears on the console (and the speaker
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beeps twice, if you have a speaker); if the user releases all the buttons
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and presses one of them again within three seconds, then the special
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command corresponding to the button is executed.
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The default special commands are:
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@table @var
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@item left button
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Reboot the system by signalling the init process
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@item middle button (if any)
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Execute @code{/sbin/shutdown -h now}
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@item right button
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Execute @code{/sbin/shutdown -r now}
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@end table
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The @samp{-S} command line switch enables special command processing and
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allows to change the three special commands. To accept the default
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commands use @samp{-S ""} (i.e., specify an empty argument). To specify
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your own commands, use a colon-separated list to specify commands
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associated to the left, middle and right button. If any of the commands
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is empty, it is interpreted as `send a signal to the init process'. This
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particular operation is supported, in addition to executing external
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commands, because sometimes bad bugs put the system to the impossibility
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to fork; in these rare case the programmer should be able to shutdown
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the system anyways, and killing init from a running process is the only
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way to do it.
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As an example, @samp{-S ":telinit 1:/sbin/halt"}, associates killing
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init to the left button, going single user to the middle one, and halting
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the system to the right button.
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System administrators should obviously be careful about special
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commands, as gpm runs with superuser permissions. Special commands are
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best suited for computers whose mouse can be physically accessed only by
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trusted people.
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%M .SH COMMAND LINE OPTIONS
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%==========================================================================
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@node Command Line, Bugs and Problems, Special Commands, Server Invocation
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@section Command Line Options
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Available command line options are the following:
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@table @code
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@item -a @var{accel}
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Set the acceleration value used when a single motion event is
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longer than @var{delta} (see @samp{-d}).
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@item -A[@var{limit}]
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Start up with selection pasting disabled. This is intended as a
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security measure; a plausible attack on a system seems to be to
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stuff a nasty shell command into the selection buffer
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(@code{rm -rf /}) including the terminating line break, then all the
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victim has to do is click the middle mouse button ..
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As of version 1.17.2, this has developed
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into a more general aging mechanism; the
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gpm daemon can disable (@emph{age}) selection pasting
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automatically after a period of inactivity. To enable this mode
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just give the optional @var{limit} parameter (no space in between !)
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which is interpreted as the time in seconds for which a selection is
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considered valid and pastable.
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As of version 1.15.7, a trivial program called
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@code{disable-paste} is provided. The following makes a good
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addition to @file{/etc/profile} if you allow multiple users to
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work on your console.
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@code{case $( /usr/bin/tty ) in @* /dev/tty[0-9]*) /usr/bin/disable-paste ;; @* esac}
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@item -b @var{baud}
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Set the baud rate.
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@item -B @var{sequence}
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Set the button sequence. @samp{123} is the
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normal sequence, @samp{321} can be used by left-handed people,
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and @samp{132} can be useful with two-button mice (especially within
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Emacs). All the button permutations are allowable.
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@item -d @var{delta}
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Set the delta value. When a single motion event
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is longer than @var{delta}, @var{accel} is used as a multiplying
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factor. (Must be 2 or above)
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@item -D
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Do not automatically enter background operation when started,
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and log messages to the standard error stream, not the syslog
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mechanism. This is useful for debugging; in previous releases
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it was done with a compile-time option.
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@item -g @var{number}
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With glidepoint devices, emulate the specified button with tapping.
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@var{number} must be @samp{1}, @samp{2}, or @samp{3}, and refers to the
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button number @emph{before} the @samp{-B} button remapping is performed.
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This option applies to the mman and ps2 decoding. No button is
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emulated by default because the ps2 tapping is incompatible with
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some normal ps2 mice
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@item -h
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Print a summary of command line options.
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@item -i @var{interval}
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Set @var{interval} to be used as an upper time limit
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for multiple clicks. If the interval between button-up and
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button-down events is less than @var{limit}, the press is considered
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a double or triple click. Time is in milliseconds.
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@item -k
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Kill a running gpm. This can be used by busmouse users to kill gpm
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before running X (unless they use @samp{-R} or the single-open
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limitation is removed from the kernel).
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@item -l @var{charset}
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Choose the @code{inword()} look up table. The
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@var{charset} argument is a list of characters. @samp{-} is used to
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specify a range and @samp{\ } is used to escape the next character
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or to provide octal codes.
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Only visible character can appear in @var{charset} because control
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characters can't appear in text-mode video memory, whence selection
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is cut.
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@item -m @var{filename}
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Choose the mouse file to open. Must be before -t and -o.
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@item -M
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Enable multiple mode. The daemon will read two different mouse devices.
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Any subsequent option will refer to the second device, while any
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preceding option will be used for the first device. This option
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automatically forces the @emph{repeater} (@samp{-R}) option on.
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@item -o @var{list-of-extra-options}
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The option works similary to the ``-o'' option of mount; it is
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used to specify a list of ``extra options'' that are specific
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to each mouse type. The list is comma-separated. The options
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@samp{dtr}, @samp{rts} or @samp{both} are used by the serial
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initialization to toggle the modem lines like, compatibly with
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earlier @i{gpm} versions; note however that using @t{-o dtr}
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associated with non-plain-serial mouse types may now generate
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an error. @xref{Mouse Types}.
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And by the way, use -o after -m and after -t.
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@item -p
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Forces the pointer to be visible while selecting. This is the
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behaviour of @file{selection-1.7}, but it is sometimes confusing.
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The default is not to show the pointer, which can be confusing as well.
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@item -r @var{number}
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Set the responsiveness. A higher responsiveness is used for a faster
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cursor motion.
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@item -R[@var{name}]
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Causes @code{gpm} to act as a repeater: any mouse data received while
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in graphic mode will be produced on the fifo @file{/dev/gpmdata}
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in protocol @var{name}, given as an optional argument (no space in
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between !). In principle, you can use the same
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names as for the @samp{-t} option, although repeating into some
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protocols may not be implemented for a while. @xref{Mouse Types}.
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In addition, you can specify @samp{raw} as the @var{name}, to repeat
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the mouse data byte by byte, without any protocol translation.
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If @var{name} is omitted, it defaults to @samp{msc}.
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Using @i{gpm} in repeater mode, you can configure the X
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server to use its fifo as a mouse device. This option is useful for
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bus-mouse owners to override the single-open limitation. It is also
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an easy way to manage those stupid dual-mode mice which force you
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to keep the middle button down while changing video mode. The option
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is forced on by the @samp{-M} option.
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@item -s @var{number}
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Set the sample rate for the mouse device.
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@item -S @var{commands}
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Enable special-command processing, and optionally specify custom
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commands as a colon-separated list. See above for a detailed
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description of special commands.
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@item -t @var{name}
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Set the mouse type. Use @samp{-t help} to get a list
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of allowable types. Since version 1.18.1, the list also shows
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which protocols are available as repeaters (see @t{-R} above),
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by marking them with an asterisk (``@t{*}'').
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@xref{Mouse Types}.
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Use -t after you selected the mouse device with -m.
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@item -v
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Print version information and exit.
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@item -2
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Force two buttons. This means that the middle button, if any,
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will be taken as it was the right one.
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@item -3
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Force three buttons. By default the
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mouse is considered to be a 2-buttons one, until the middle button
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is pressed. If three buttons are there, the right one is used
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to extend the selection, and the middle one is used to paste it.
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Beware: if you use the @samp{-3} option with a 2-buttons mouse, you
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won't be able to paste the selection.
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@end table
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@ignore
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.SH OPERATION
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To select text press the left mouse button and drag the mouse.
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To paste text in the same or another console, press the middle button.
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The right button is used to extend the selection, like in `xterm'.
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Two-button mice use the right button to paste text.
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Double and triple clicks select whole word and whole lines. Use of
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the `-p' option is recommended for best visual feedback.
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If a trailing space after the contents of a line is highlighted, and if
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there is no other text on the remainder of the line, the rest of the
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line will be selected automatically. If a number of lines are selected,
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highlighted trailing spaces on each line will be removed from the
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selection buffer.
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Any output on the virtual console holding the selection will clear the
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highlighted selection from the screen, to maintain integrity of the
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display, although the contents of the paste buffer will be unaffected.
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The selection mechanism is disabled if the controlling virtual console
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is placed in graphics mode, for example when running X11, and is
|
|
re-enabled when text mode is resumed. (But see BUGS section below.)
|
|
|
|
@end ignore
|
|
|
|
%MSKIP
|
|
@menu
|
|
* Bugs and Problems::
|
|
@end menu
|
|
|
|
@node Bugs and Problems, Mouse Types, Command Line, Server Invocation
|
|
@section Bugs and Problems
|
|
|
|
%M .SH BUGS
|
|
The @code{gpm} server may have problems interacting with X: if your
|
|
mouse is a single-open device (i.e. a bus mouse), you should kill
|
|
@code{gpm} before starting X, or use the @samp{-R} option (see
|
|
above). To kill @code{gpm} just invoke @code{gpm -k}. This problem doesn't
|
|
apply to serial mice.
|
|
|
|
Two instances of gpm can't run on the same system. If you have two mice use
|
|
the @samp{-M} option (see above).
|
|
|
|
While the current console is in graphic mode, @code{gpm} sleeps until
|
|
text mode is back (unless @samp{-R} is used). Thus, it won't reply to
|
|
clients. Anyways, it is unlikely that mouse-eager clients will spur
|
|
out in hidden consoles.
|
|
|
|
The clients shipped out with gpm are not updated, thus there are potential
|
|
security risks when using them.
|
|
|
|
@ignore
|
|
|
|
.SH AUTHORS
|
|
.nf
|
|
Andrew Haylett <ajh@gec-mrc.co.uk> (the original selection code)
|
|
Ian Zimmerman <itz@speakeasy.org> (old maintainer)
|
|
Alessandro Rubini <rubini@linux.it> (old maintainer (still helps a lot))
|
|
Nico Schottelius <nico@schottelius.org> (maintainer)
|
|
|
|
Many many contributors, to both selection and gpm.
|
|
.fi
|
|
|
|
.SH MAINTAINERS
|
|
|
|
The current maintainer is Nico Schottelius. But without the help of
|
|
Alessandro Rubini and the mailing list it would be impossible for me to
|
|
maintain gpm. The development mailing list can be reached under
|
|
gpm@lists.linux.it. More information on the list is in the README file part of
|
|
the source distribution of gpm.
|
|
|
|
.SH FILES
|
|
.nf
|
|
/var/run/gpm.pid The PID of the running gpm
|
|
/dev/gpmctl A control socket for clients
|
|
/dev/gpmdata The fifo written to by a \fBrepeater\fP (`-R') daemon.
|
|
.fi
|
|
|
|
.SH SEE ALSO
|
|
.nf
|
|
\fB mev(1)\fP A sample client for the gpm daemon.
|
|
\fB gpm-root(1)\fP An handler for Control-Mouse events.
|
|
|
|
.fi
|
|
The info file about `gpm', which gives more complete information and
|
|
explains how to write a gpm client.
|
|
|
|
@end ignore
|
|
%MANPAGE END
|
|
|
|
%==========================================================================
|
|
@node Mouse Types, , Bugs and Problems, Server Invocation
|
|
@section Mouse Types
|
|
|
|
%MANPAGE gpm-types.7
|
|
%M .TH GPM-TYPES 7 "July 2000"
|
|
%M .UC 4
|
|
%M .SH NAME
|
|
%M gpm-types \- pointer types (mice, tablets, etc.) managed by gpm.
|
|
%M .br
|
|
%M The information below is extracted from the texinfo file, which is the
|
|
%M preferred source of information.
|
|
%M .SH DESCRIPTION
|
|
%MSKIP
|
|
This section of the gpm documentation manual
|
|
%M This manpage
|
|
describes the various pointer types currently available in @i{gpm}. If you
|
|
look at the source code, you'll find that pointer-specific code is
|
|
confined to @file{mice.c} (while it used to only include mouse decoders,
|
|
@i{gpm} now supports tablets and touchscreens as well).
|
|
|
|
The mouse type is specified on command line with the @samp{-t}
|
|
option. The option takes an argument, which represents the name of a
|
|
mouse type. Each type can be associated to different names. For old
|
|
mouse types, one name is the old selection-compatible name, and another
|
|
is the XFree name. After version 1.18.1 of @i{gpm}, the number of
|
|
synonyms was made arbitrary and the actual name being used is made
|
|
available to the function responsible for mouse
|
|
initialization. Therefore it is possible for a mouse decoder to behave
|
|
slightly differently according to the name being used for the device (if
|
|
this feature was already present, we wouldn't have for example @t{ms+}
|
|
and @t{ms+lr} as different mouse types).
|
|
|
|
The initialization procedure of each mouse type can also receive extra
|
|
option, by means of the @t{-o} command line option. Since
|
|
interpretation of the option string is decoder-specific, the allowed
|
|
options are described in association to each mouse type. When no
|
|
description of option strings is provided, that means the option
|
|
string is unused for that mouse type and specifying one generates an
|
|
error. When the document refer to ``standard serial options'' it means
|
|
that one of @t{-o dtr}, @t{-o rts}, @t{-o both} can be specified to
|
|
toggle the control lines of the serial port.
|
|
|
|
The following mouse type are corrently recognized:
|
|
|
|
@table @code
|
|
@item bare Microsoft
|
|
The Microsoft protocol, without any extension. It only reports
|
|
two buttons. If your device has three, you should either try
|
|
running the @t{mman} decoder or @t{msc}. In the latter case,
|
|
you need to tell the mouse to talk @t{msc} protocol by
|
|
toggling the DTR and RTS lines (with one of @t{-o drt}, @t{-o
|
|
rts} or @t{-o both}) or invoking @code{gpm -t msc} while
|
|
keeping the middle button pressed. Very annoying, indeed.
|
|
This mouse decoder accepts standard serial options, although they
|
|
should not be needed.
|
|
|
|
@item ms
|
|
This is the original Microsoft protocol, with a middle-button
|
|
extension. Some old two-button devices send some spurious
|
|
packets which can be misunderstood as middle-button events. If
|
|
this is your case, use the @samp{bare} mouse type. Some new
|
|
two-button devices are ``plug and play'', and they don't play
|
|
fair at all; in this case try @t{-t pnp}. Many (most)
|
|
three-button devices that use the microsoft protocol fail to
|
|
report some middle-button events during mouse motion. Since
|
|
the protocol does not distinguish between the middle button
|
|
going up and the middle button going down it would be liable
|
|
to get out of step, so this decoder declares the middle button
|
|
to be up whenever the mouse moves. This prevents dragging with
|
|
the middle button, so you should probably use @samp{-t ms+lr}
|
|
instead of this decoder, especially if you want to use X.
|
|
This mouse decoder accepts standard serial options, although
|
|
they should not be needed.
|
|
|
|
@item ms+
|
|
This is the same as @samp{-t ms} except that the middle button
|
|
is not reset during mouse motion. So you can drag with the
|
|
middle button. However, if your mouse exhibits the usual buggy
|
|
behaviour the decoder is likely to get out of step with
|
|
reality, thinking the middle button is up when it's down and
|
|
vice versa. You should probably use @samp{-t ms+lr} instead
|
|
of this decoder. This mouse decoder accepts standard serial
|
|
options, although they should not be needed.
|
|
|
|
@item ms+lr
|
|
This is the same as @samp{-t ms+} except that there is an
|
|
additional facility to reset the state of the middle button by
|
|
pressing the other two buttons together. Do this when the
|
|
decoder gets into a confused state where it thinks the middle
|
|
button is up when it's down and vice versa. (If you get sick
|
|
of having to do this, please don't blame gpm; blame your buggy
|
|
mouse! Note that most three-button mice that do the microsoft
|
|
protocol can be made to do the MouseSystems protocol
|
|
instead. The ``3 Button Serial Mouse mini-HOWTO'' has
|
|
information about this.) This mouse decoder accepts standard
|
|
serial options, although they should not be needed.
|
|
|
|
@item msc MouseSystems
|
|
This is the standard protocol for three-button serial devices.
|
|
Some of such devices only enter MouseSystem mode if the RTS, DTR
|
|
or both lines are pushed low. Thus, you may try @t{-t msc}
|
|
associated with @t{-o rts}, @t{-o dtr} or @t{-o both}.
|
|
|
|
@item mman Mouseman
|
|
The protocol used by the new Logitech devices with three
|
|
buttons. It is backward compatible with the Microsoft
|
|
protocol, so if your mouse has three buttons and works with
|
|
@t{-t ms} or similar decoders you may try @t{-t mman} instead
|
|
to use the middle button. This mouse decoder accepts standard
|
|
serial options, although they should not be needed.
|
|
|
|
@item sun
|
|
The protocol used on Sparc computers and a few others.
|
|
This mouse decoder accepts standard serial options, although
|
|
they should not be needed.
|
|
|
|
@item mm MMSeries
|
|
Title says it all.
|
|
This mouse decoder accepts standard serial options, although
|
|
they should not be needed.
|
|
|
|
@item logi Logitech
|
|
This is the protocol used by old serial Logitech mice.
|
|
|
|
@item bm BusMouse
|
|
Some bus devices use this protocol, including those produced
|
|
by Logitech.
|
|
|
|
@item ps2 PS/2
|
|
The protocol used by most busmice.
|
|
|
|
@item ncr
|
|
This `type' is able to decode the pointing pen found
|
|
on some laptops (the NCR 3125 pen)
|
|
|
|
@item wacom
|
|
The protocol used by the Wacom tablet. Since version 1.18.1
|
|
we have a new Wacom decoder, as the old one was not working
|
|
with new tablets. This decoder was tested with Ultrapad,
|
|
PenPartner, and Graphire tablets.
|
|
Options:
|
|
@t{-o relative} (default) for relative mode,
|
|
@t{-o absolute} for absolute mode.
|
|
|
|
@item genitizer
|
|
The \"Genitizer\" tablet, in relative mode.
|
|
This mouse decoder accepts standard serial options, although
|
|
they should not be needed.
|
|
|
|
@item logim
|
|
Used to turn Logitech mice into Mouse-Systems-Compatible.
|
|
Obviously, it only works with some of the Logitech mice.
|
|
|
|
@item pnp
|
|
This decoder works with the new mice produces by our friend Bill,
|
|
and maybe with the old ones as well. The Pnp protocol is
|
|
hardwired at 1200 baud and is upset by normal initialization, so
|
|
this is a @t{-t bare} decoder with no initialization at all.
|
|
This mouse decoder accepts standard serial options, although
|
|
they should not be needed.
|
|
|
|
@item ms3
|
|
A decoder for the new serial IntelliMouse devices, the ones
|
|
with three buttons and a protocol incompatible with older
|
|
ones. The wheel is currently unused.
|
|
|
|
@item imps2
|
|
``IntelliMouse'' on the ps/2 port. This type can also be used for
|
|
a generic 2-button ps/2 mouse too, since it will auto-detect the type.
|
|
|
|
@item netmouse
|
|
Decodes the ``Genius NetMouse'' type of devices on the ps/2
|
|
port. For serial ``Netmouse'' devices, use the ``ms3'' decoder.
|
|
|
|
|
|
@item cal
|
|
A decoder of the ``Calcomp UltraSlate device.
|
|
|
|
@item calr
|
|
Same as above, but in relative mode.
|
|
|
|
@item twid
|
|
Support for the twiddler keyboard. As of gpm-1.14 this decoder
|
|
includes a char generator for the text console, but doesn't
|
|
yet support X keycodes. If used with @samp{-R}, @code{gpm} will anyway
|
|
repeat mouse events to the X server. More information about twiddler
|
|
support can be found in @file{README.twiddler}, in the gpm
|
|
distribution.
|
|
|
|
@item syn synaptics
|
|
A decoder for the Synaptics TouchPad connected to the serial port.
|
|
This mouse decoder accepts standard serial options, although
|
|
they should not be needed.
|
|
|
|
@item synps2 synaptics_ps2
|
|
Same as above, but for the devices attached to the ps2 port.
|
|
|
|
@item brw
|
|
A decoder for the Fellowes Browser, a device with 4 buttons
|
|
and a wheel.
|
|
This mouse decoder accepts standard serial options, although
|
|
they should not be needed.
|
|
|
|
@item js Joystick
|
|
This mouse type uses the joystick device to generate mouse
|
|
events. It is only available if the header @file{linux/joystick.h}
|
|
is found at compile time. The header (and the device as well)
|
|
has been introduced only during 2.1 development, and is not
|
|
present in version 2.0 of the kernel.
|
|
|
|
@item summa
|
|
This is a decode for the Symmagraphics of Genius tablet, run in
|
|
absolute mode. A repeater is associated to this decoder, so it
|
|
can @t{-R summa} can be used to generate X events even for other
|
|
absolute-pointing devices, like touchscreens. To use the repeated
|
|
data from X, you need a modified @t{xf86Summa.o} module.
|
|
|
|
@item mtouch
|
|
A decoder for the MicroTouch touch screen. Please refer to the
|
|
file @file{README.microtouch} in the source tree of gpm for
|
|
further information. In the near future, anyways, I plan to fold
|
|
back to this documentation the content of that file.
|
|
|
|
@item gunze
|
|
A decoder for the gunze touch screen. Please refer to the
|
|
file @file{README.gunze} in the source tree of gpm for
|
|
further information. In the near future, anyways, I plan to fold
|
|
back to this documentation the content of that file. The decoder
|
|
accepts the following options: @t{smooth=}, @t{debounce=}. An
|
|
higher smoothness results in slower motion as well; a smaller
|
|
smoothness gives faster motion but, obviously, less smooth.
|
|
The default smoothness is 9. The debounce time is express in
|
|
milliseconds and is the minimum duration of an up-down event
|
|
to be taken as a tap. Smaller bounces are ignored.
|
|
|
|
@item acecad
|
|
The Acecad tablet in absolute mode.
|
|
|
|
@item wp wizardpad
|
|
Genius WizardPad tablet
|
|
|
|
@end table
|
|
|
|
@ignore
|
|
|
|
.SH FILES
|
|
.nf
|
|
src/mice.c The source file for pointer decoders
|
|
.fi
|
|
|
|
.SH SEE ALSO
|
|
.nf
|
|
\fB gpm(8) \fP The General Purpose Mouse server
|
|
|
|
.fi
|
|
The info file about `gpm', which gives more complete information and
|
|
explains how to write a gpm client.
|
|
|
|
@end ignore
|
|
|
|
%MANPAGE END
|
|
|
|
|
|
%##########################################################################
|
|
@node Gpm Internals, The ClientLib, Server Invocation, Top
|
|
@chapter Gpm Internals
|
|
@cindex Internals
|
|
|
|
The server is organized as a main loop built around a @code{select()}
|
|
system call. It responds both to mouse events and to input from the
|
|
clients, which are connected to the server through a unix domain
|
|
socket. The connection is used to tell the server what a client is
|
|
interested in, and to get mouse events.
|
|
|
|
When no clients are connected to the active console, the server runs
|
|
the selection mechanism (cut and paste of text). The selection
|
|
mechanism is a simple and well-designed application, whose behaviour
|
|
can be cloned by clients, by telling the server to inherit the default
|
|
response for certain mouse events (motion being the most
|
|
interesting).
|
|
|
|
@menu
|
|
* Events::
|
|
* Margins::
|
|
* Event Types::
|
|
* Connection Details::
|
|
* Default Handlers::
|
|
@end menu
|
|
|
|
%==========================================================================
|
|
@node Events, Margins, Gpm Internals, Gpm Internals
|
|
@section Events
|
|
@cindex Events
|
|
|
|
Whenever the mouse generates an event, the event is dispatched to the
|
|
active client for the current console, or to the default handler, if
|
|
present. Otherwise selection is run. A default handler is a client
|
|
process which gets mouse events form all the virtual
|
|
consoles.
|
|
@xref{Default Handlers}.
|
|
|
|
When a client is involved, it is handled a @code{Gpm_Event}
|
|
structure, built by the server. The fields for @code{Gpm_Event} are the
|
|
following:
|
|
@tindex Gpm_Event
|
|
|
|
@table @code
|
|
|
|
@item unsigned char buttons;
|
|
An or-mask of the values @code{GPM_B_LEFT},
|
|
@code{GPM_B_MIDDLE} and @code{GPM_B_RIGHT}. It corresponds to
|
|
the state of the mouse buttons when the event is reported. The
|
|
current implementation of gpm allows at most three buttons.
|
|
|
|
@item unsigned char modifiers;
|
|
The value of the kernel variable
|
|
@code{shift_state}, as of @file{keyboard.c}, when the event is
|
|
reported. It is a bitmask value, and corresponds to the least
|
|
significant byte of the value used by the @code{loadkeys}
|
|
program. Use of symbolic
|
|
names in source code is available after inclusion of
|
|
@file{linux/keyboard.h}, as exemplified in @file{mev.c}.
|
|
|
|
@item unsigned short vc;
|
|
The number of the active virtual console when
|
|
the event is reported. The client is not expected to use this value,
|
|
which corresponds to the controlling terminal of the client process,
|
|
unless it gets events form multiple consoles.
|
|
@xref{Default Handlers}.
|
|
|
|
@item short x, y;
|
|
The position of the mouse pointer where the event
|
|
is reported. It is 1-based by default, to be compatible with
|
|
@code{selection} and @code{libcurses}. This behavior can be
|
|
overriden, though, by setting the library variable
|
|
@code{gpm_zerobased}.
|
|
@xref{Variables}.
|
|
|
|
@item short dx, dy;
|
|
The change in position since the last reported
|
|
event.
|
|
|
|
@item enum Gpm_Etype type;
|
|
A bit-mask, representing the
|
|
type of reported event, as described later.
|
|
@xref{Event Types}.
|
|
|
|
@item int clicks;
|
|
A counter, which is valid at button-down, drag or
|
|
button-up. It can be 0, 1 or 2 to mean single, double or triple
|
|
click.
|
|
|
|
@item enum Gpm_Margin margin;
|
|
A bit-mask, telling if the pointer has
|
|
gone out of the visible screen. The indivudual bits are
|
|
named @code{GPM_TOP}, @code{GPM_BOT}, @code{GPM_LFT},
|
|
@code{GPM_RGT}. Only one
|
|
of them is active at a time, to allow using @code{switch} on the
|
|
value. Vertical outrun takes precedence on horizontal outrun.
|
|
@xref{Margins}.
|
|
@end table
|
|
|
|
%==========================================================================
|
|
@node Margins, Event Types, Events, Gpm Internals
|
|
@section How margins are managed
|
|
|
|
Motion and button-press events are constrained to remain within the
|
|
visible screen. This means that the @code{x} will be within 1 and 80 and
|
|
@code{y} will be within 1 and 25 when the console is 80x25
|
|
cells. However, a client can keep track of movements outside the
|
|
screen, by using the @code{dx} and @code{dy} fields, which aren't subject to
|
|
clipping.
|
|
|
|
The server helps applications in detecting margin conditions by filling the
|
|
@code{margin} field. Whenever the pointer tries to cross screen boundaries,
|
|
it is forced to remain on the border, but a flag is set in @code{margin}.
|
|
|
|
A different policy is in force for drag and button-release events. In this
|
|
case the pointer is allowed to go outside the physical screen by exactly
|
|
one position. This allows, for example, selecting to end of line
|
|
by dragging down-left. The peculiar situation is nonetheless signaled
|
|
through the @code{margin} flags. The client should be careful to
|
|
fit the values within the screen if needed.
|
|
@xref{Utility Functions}.
|
|
|
|
|
|
%==========================================================================
|
|
@node Event Types, Connection Details, Margins, Gpm Internals
|
|
@section Event Types
|
|
|
|
The @code{type} field in @code{Gpm_Event} is made up of bit-wide
|
|
flags. The existing bit masks belong to two groups: bare events and
|
|
cooked events. The bit-mask @code{GPM_BARE_EVENTS} is provided to
|
|
extract bare events, by and-ing (@samp{&}) it with the @code{type} field.
|
|
For any event, exactly one bit will be set in the resulting bitmask.
|
|
|
|
Bare events are the following:
|
|
|
|
@table @code
|
|
@item GPM_MOVE
|
|
A motion event, with all buttons up.
|
|
@item GPM_DRAG
|
|
A motion event, but one or more buttons are kept pressed.
|
|
@item GPM_DOWN
|
|
A button press event. The @code{buttons} field will report
|
|
which buttons are pressed after the event.
|
|
@item GPM_UP
|
|
A button release event. The @code{buttons} field will report
|
|
which buttons are being released. Note that this is different from
|
|
the previous case.
|
|
@item GPM_ENTER
|
|
This means "enter in the current Region of Interest", and such
|
|
event can only happen if the high-level library is used.
|
|
When the type is @code{GPM_ENTER}, all the other fields are undefined.
|
|
@xref{High Level Lib}.
|
|
@item GPM_LEAVE
|
|
This is only delivered by the high level library, too. Events
|
|
of type @code{GPM_LEAVE} have all other fields undefined.
|
|
@end table
|
|
|
|
Cooked events are the following:
|
|
|
|
@table @code
|
|
@item GPM_SINGLE
|
|
This bit may be set at button-press,
|
|
drag and button release events, and can be used to identify a
|
|
single press. The time interval used to choose a double click
|
|
from two single clicks is set by a parameter in the daemon
|
|
(configurable at daemon invocation).
|
|
@item GPM_DOUBLE
|
|
Used to identify a double click (press, drag, release)
|
|
@item GPM_TRIPLE
|
|
Used to identify a triple click (press, drag, release)
|
|
@item GPM_MFLAG
|
|
The ``motion flag'' is true if some dragging happened
|
|
between button-press and button-release. It can be used by
|
|
those applications which respond to events at button release.
|
|
It is available at drag and release.
|
|
@end table
|
|
|
|
%==========================================================================
|
|
@node Connection Details, Default Handlers, Event Types, Gpm Internals
|
|
@section Connection Details
|
|
|
|
Each virtual console has a stack of clients attached to it. They talk to
|
|
gpm by writing to a control socket and get mouse events by reading
|
|
it. All the clients in the stack can receive events. Gpm-1.10 and earlier
|
|
only sent events to the top client, but sometimes users play with
|
|
multiple programs using suspend-resume (thanks Ian).
|
|
|
|
In addition to the per-console stacks, another stack is there to store
|
|
default-handling clients.
|
|
@xref{Default Handlers}.
|
|
|
|
Each client registers with the server and tells which events it is
|
|
interested in. Events not managed by the client can be handled by the
|
|
selection mechanism, which is compiled in the server itself. This
|
|
approach simplifies writing clients which respond only to button
|
|
press/release events, because highlighting the mouse pointer can be
|
|
performed by the server. A default handler in turn can respond only to
|
|
mouse events associated with modifier keys, so that selection is used
|
|
for any mouse-only event.
|
|
|
|
Clients are required to fill a @code{Gpm_Connect} structure and pass
|
|
it to the server. The structure is made up by four @code{unsigned int}
|
|
fields.
|
|
@xref{Open and Close}.
|
|
@tindex Gpm_Connect
|
|
|
|
@table @code
|
|
@item eventMask
|
|
A bitmask of the events the client wants
|
|
to receive. Both bare and cooked events are
|
|
allowed to appear in the mask.
|
|
|
|
@item defaultMask
|
|
A mask to tell which events allow
|
|
a default treatment (the selection one). These are mouse events,
|
|
independent of the modifier keys.
|
|
|
|
@item minMod
|
|
The minimum amount of modifiers
|
|
required by the client. This field is used for default-handlers
|
|
which manage control-mouse events without interfering
|
|
with mouse-only ones.
|
|
@xref{Default Handlers}.
|
|
|
|
@item maxMod
|
|
The maximum amount of modifiers the client is willing to receive.
|
|
Events featuring a modifier key not included in @code{maxMod} won't
|
|
be passed to the client.
|
|
@end table
|
|
@noindent
|
|
Two more fields are there to tell about the connection itself, and you're
|
|
not asked to fill them, because @code{Gpm_Open} will do it for you.
|
|
|
|
@table @code
|
|
@item int pid
|
|
The process id of the connecting application.
|
|
@item int vc
|
|
Which virtual console to gain control of.
|
|
@end table
|
|
|
|
Keyboard modifiers are used to multiplex clients on the same virtual
|
|
console. You (as a programmer) don't need to care about the internal
|
|
workings. They are detailed in @ref{Default Handlers}, but you only
|
|
need to choose the right values for your application.
|
|
|
|
Examples:
|
|
@table @code
|
|
@item minMod=0; maxMod=0;
|
|
specifies a client which senses mouse-only events, but neither
|
|
shift-mouse nor alt-mouse nor control-mouse.
|
|
|
|
@item minMod=0; maxMod=~0;
|
|
is a client which gets any mouse event.
|
|
|
|
@item minMod=1<<KG_SHIFT; maxMod=1<<KG_SHIFT;
|
|
is a client which senses all shift-mouse events and
|
|
nothing more.
|
|
|
|
@item minMod=1<<KG_SHIFT; maxMod=~0;
|
|
is a client interested in shift-and-whatever-else mouse events,
|
|
but disregarding mouse-only events.
|
|
@end table
|
|
|
|
If the modifier keys in the event are too few or too many, the event
|
|
won't be reported to the client. If the modifiers are right but the
|
|
current event is not part of the @code{eventMask}, it is not reported as
|
|
well. If the event is not used by the client, it can nonetheless be
|
|
passed to another client (a default handler or the internal selection
|
|
mechanism), according to the @code{defaultMask}. If the event has been
|
|
already reported to the current application, it will also be passed
|
|
along the chain, if the GPM_HARD bit is set the @code{defaultMask}.
|
|
|
|
Good values for @code{defaultMask} can thus be the following:
|
|
|
|
@table @code
|
|
@item 0
|
|
To sink any event, even those I don't use.
|
|
@item ~eventMask
|
|
Pass along any event I don't use.
|
|
@item ~GPM_HARD
|
|
Just the same, independently of @code{eventMask}.
|
|
@item GPM_MOVE|GPM_HARD
|
|
Pass motion events, even if I use them.
|
|
This is the good choice for an application which wants information on
|
|
mouse motion, but leaves the task of cursor-drawing to the server.
|
|
@end table
|
|
|
|
%==========================================================================
|
|
@node Default Handlers, , Connection Details, Gpm Internals
|
|
@section Default Handlers
|
|
|
|
In addition to console-specific clients, @code{gpm} allows for
|
|
console-independent clients -- those clients which handle events ignored
|
|
by conventional clients
|
|
|
|
Keyboard modifiers are used to multiplex the different clients on the
|
|
same console, and a default handler should specify a non-zero minimum
|
|
modifier set.
|
|
|
|
To summarize, events which get to the server can be delivered to
|
|
the following @emph{clients}, in the order of decreasing priority:
|
|
|
|
@enumerate 1
|
|
@item The current client for the current console, if any.
|
|
|
|
@item The default handler, if any.
|
|
|
|
@item The builtin `selection' mechanism.
|
|
@end enumerate
|
|
|
|
A keyboard modifier which connected with a @code{minMod} equal to the
|
|
"Control" modifier and a @code{maxMod} of @samp{~0} (all bits on), will then
|
|
get any event including the control key, if the application disregards it.
|
|
|
|
This means that if the foreground application gets only the "Meta" key,
|
|
control-mouse is sufficient to invoke the default handler. If the application
|
|
gets control-mouse but disregards "Meta", conversely, meta-control-mouse will
|
|
invoke the default handler, and meta-mouse will be delivered to selection.
|
|
|
|
Both the @code{minMod} and @code{maxMod} fields are bitmasks, and their values
|
|
are bitwise or-ed and and-ed with the current modifier mask.
|
|
|
|
@code{gpm-root} is an example of default handler. It gets control-mouse events
|
|
by default, and reads user-specific configuration files in order to draw
|
|
menus on the background of your screen.
|
|
@xref{gpm-root}.
|
|
|
|
%##########################################################################
|
|
@node The ClientLib, Demo Clients, Gpm Internals, Top
|
|
@chapter The Client Library
|
|
|
|
The @file{libgpm.a} archive is meant to provide the mouse protocol at
|
|
different levels of abstraction. Applications linking to the @code{gpm}
|
|
server are expected to benefit from using the library, as compared to
|
|
managing the raw socket interface. Any source file using the library
|
|
should include @file{gpm.h} to get gpm specific macros and
|
|
prototypes.
|
|
|
|
Delivery of events within the library makes heavy use of the concept
|
|
of "Handling Function" (or "handler", for short).
|
|
|
|
@menu
|
|
* Handling Functions::
|
|
* Low Level Library::
|
|
* High Level Lib::
|
|
* Xterm::
|
|
@end menu
|
|
|
|
%==========================================================================
|
|
@node Handling Functions, Low Level Library, The ClientLib, The ClientLib
|
|
@section Handling Functions
|
|
|
|
A mouse handler is a function which registers itself within the
|
|
library, and is called whenever a mouse event is reported to the
|
|
application. It is passed two arguments and returns an integer value,
|
|
according to the following typedef:
|
|
|
|
@code{typedef int Gpm_Handler(Gpm_Event *@var{event}, void *@var{clientdata});}
|
|
@tindex Gpm_Handler
|
|
|
|
The @var{event} is used to instantiate the mouse event just received,
|
|
and the @var{clientdata} pointer is needed to implement some higher
|
|
level functionality. An handler will be typically invoked by
|
|
@code{Gpm_Getc}, or by the high-level library, and the following
|
|
discussion assumes the invoking function is @code{Gpm_Getc} (the
|
|
high-level library only runs on behalf of @code{Gpm_Getc}).
|
|
|
|
Handling functions can do whatever they want to, and return to the caller
|
|
an integer value, which can be used to generate a keyboard event. This
|
|
feature is useful in that often the mouse is a shortcut for something which
|
|
could be made by means of the keyboard.
|
|
|
|
The application main loop can detect if the keyboard event is a physical
|
|
or generated one by looking at the global variable @code{gpm_hflag}, which
|
|
is not zero only for handler-generated events.
|
|
|
|
An handling function can generate more than one key in response of a single
|
|
mouse event. If it sets the global variable @code{gpm_morekeys} to a non-zero
|
|
variable before returning, it will be invoked again without waiting for
|
|
mouse events. You can use @code{gpm_morekeys} as a counter of how
|
|
many times you want to be called again -- the client library only compares
|
|
it to zero.
|
|
|
|
The return value from an handler is used as follows:
|
|
|
|
@table @code
|
|
@item EOF
|
|
This value is used to signal a fatal error, and will cause
|
|
@code{Gpm_Getc} to return the same value to the caller, after setting
|
|
@code{gpm_hflag} to 1.
|
|
|
|
@item 0
|
|
A zero return value means that @code{Gpm_Getc} should go on as
|
|
before, without returning to the caller. The event has been eaten
|
|
by the handler and no key-press is simulated.
|
|
|
|
@item @var{anything-else}
|
|
Any other value is considered a simulated
|
|
character, and is returned to the caller after setting
|
|
@code{gpm_hflag}. This allows a quick way to implement yes/no
|
|
boxes and simple menus without interfering with the main body
|
|
of an existing application. Moreover, if return values greater
|
|
than 255 are used a single switch loop can parse both keyboard
|
|
and mouse events.
|
|
@end table
|
|
|
|
@noindent
|
|
A mouse handler is passed as second argument the content of the
|
|
@code{gpm_data} variable, i.e. the current clientdata. The clientdata is
|
|
almost unuseful unless you use the high-level library, because it holds
|
|
a static value. Delivering the clientdata however allows the
|
|
high-level management of mouse events to be a superset of the
|
|
low-level code, rather than an incompatible alternative.
|
|
|
|
%==========================================================================
|
|
@node Low Level Library, High Level Lib, Handling Functions, The ClientLib
|
|
@section Low Level Library
|
|
|
|
The library offers utility functions to establish the connection and
|
|
to get mouse events. They are designed to work painlessly if the
|
|
server is not running on the host machine. Xterm support is available
|
|
as well.
|
|
@xref{Xterm}.
|
|
|
|
@menu
|
|
* Variables ::
|
|
* Open and Close::
|
|
* Getting Events::
|
|
* Utility Functions::
|
|
* Extra Functions::
|
|
@end menu
|
|
|
|
%--------------------------------------------------------------------------
|
|
@node Variables , Open and Close, Low Level Library, Low Level Library
|
|
@subsection Global Variables
|
|
|
|
|
|
This is the list of all the global variables present in the client
|
|
library:
|
|
|
|
@table @code
|
|
@vindex gpm_flag
|
|
@item int gpm_flag
|
|
Initially zero, it is used to tell if the process
|
|
is connected with a mouse server or not. It is used as a counter to
|
|
manage multiple opens as well.
|
|
@vindex gpm_tried
|
|
@item int gpm_tried
|
|
A flag, used to avoid retrying a connection if
|
|
the server is not available on the system.
|
|
@vindex gpm_fd
|
|
@item int gpm_fd
|
|
Initially @samp{-1}, it is the file descriptor used
|
|
to talk with the server. If we run under xterm, it will be -2.
|
|
@vindex gpm_zerobased
|
|
@item int gpm_zerobased
|
|
Since selection and curses has always been one-based,
|
|
this variable, zero by default, can be used to trigger zero-based
|
|
coordinates in event reporting. It must be set before opening the mouse
|
|
connection, and never changed later.
|
|
@xref{Events}.
|
|
@vindex gpm_visiblepointer
|
|
@item int gpm_visiblepointer
|
|
If not zero, causes the mouse cursor to be always visible on the
|
|
window. It is zero by default.
|
|
@vindex gpm_mx
|
|
@vindex gpm_my
|
|
@item gpm_mx
|
|
@itemx gpm_my
|
|
These variables (max X and max Y) are used when fitting events
|
|
inside the screen. They are initialized by @code{Gpm_Open}, and
|
|
updated by a @code{SIGWINCH} handler internal to the library.
|
|
(Don't worry, the library doesn't @emph{replace} any
|
|
@code{SIGWINCH} handler your program may already have installed;
|
|
instead the library @emph{hooks} the signal, that is, it calls
|
|
any preexisting handler after taking care of its own needs.)
|
|
@vindex gpm_hflag
|
|
@item int gpm_hflag
|
|
Used to signal if a character has been generated
|
|
by a mouse handler.
|
|
@xref{Handling Functions}.
|
|
@vindex gpm_handler
|
|
@vindex gpm_data
|
|
@item Gpm_Handler *gpm_handler; void *gpm_data
|
|
Both initially @code{NULL},
|
|
they're used to setup asynchronous mouse handling, as
|
|
described below under the @code{Gpm_Getc()} item.
|
|
@vindex gpm_morekeys
|
|
@item gpm_morekeys
|
|
Used by the mouse handler to provide more than one key:
|
|
if @code{gpm_morekeys} is not zero, @code{Gpm_Getc} will
|
|
invoke the handler without waiting for events. @code{gpm_morekeys}
|
|
is never set by the mouse library.
|
|
@end table
|
|
|
|
|
|
%--------------------------------------------------------------------------
|
|
@node Open and Close, Getting Events, Variables , Low Level Library
|
|
@subsection Connecting and Disconnecting
|
|
%.........................................................................
|
|
@deftypefun int Gpm_Open (Gpm_Connect *@var{conn}, int @var{flag});
|
|
|
|
Open a connection with the server. The @var{conn} parameter points to
|
|
the connection information for the being-created connection, as already
|
|
described.
|
|
@xref{Connection Details}.
|
|
It is passed to the server after
|
|
filling the @code{pid} and @code{vc} fields.
|
|
|
|
@var{flag} should be @samp{0} for normal applications, those interested
|
|
in events related to their own console. The own console is considered to
|
|
be the one attached to @code{stdin}, and it must match the string
|
|
@samp{/dev/tty*}. A negative value for @var{flag} is used to make the
|
|
invoking application a default handler @ref{Default Handlers}, while a
|
|
positive value is used to force connection to a particular console,
|
|
either for debugging issues or whenever @code{stdin} is not a tty when
|
|
@code{Gpm_Open} is invoked.
|
|
|
|
Multiple opens are allowed, and a stack of @code{Gpm_Connect} structures
|
|
is managed by the library. You can, thus, re-open the connection in
|
|
order to temporarily change the range of events you're interested
|
|
in. When you invoke an external program, for example, you should re-open
|
|
the connection with @code{eventMask} zeroed, and @code{defaultMask},
|
|
@code{minMod} and @code{maxMod} all equal to @samp{~0}.
|
|
|
|
The return value is either @samp{-1} or the file descriptor used to
|
|
communicate with the server. When run under xterm, a gpm client gets event
|
|
through @code{stdin}, and the return value for @code{Gpm_Open()} will be @samp{-2}.
|
|
This value is always available in @code{gpm_fd}.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun int Gpm_Close (void);
|
|
|
|
Pops the connection stack. It is used to restore the previous situation
|
|
after a change in the connection masks. Closes the actual connection
|
|
when the stack gets empty. On last close it returns 0, -1 otherwise.
|
|
@end deftypefun
|
|
|
|
%--------------------------------------------------------------------------
|
|
@node Getting Events, Utility Functions, Open and Close, Low Level Library
|
|
@subsection Getting Events
|
|
%.........................................................................
|
|
@deftypefun int Gpm_GetEvent (Gpm_Event *@var{event});
|
|
|
|
Reads an event form @code{gpm_fd}. It should be called only when the
|
|
@code{gpm_fd} descriptor is reported as readable by a @code{select()}
|
|
system call, or it will block until an event arrives (unless you put the
|
|
mouse file in non-blocking mode). It returns 1 on success, -1 on
|
|
failure, and 0 after closing the connection. Failure can happen if a
|
|
signal interrupted the read system call. This function doesn't work with
|
|
xterm mouse reporting and is meant for internal use by the library.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun int Gpm_CharsQueued (void);
|
|
|
|
It returns the number of characters (contained in @code{nbprevchar} index)
|
|
queued into the array @code{prevchar} by function @code{Gpm_Getc}.
|
|
This call is useful i.e. in recognition of function or arrow keys, when we
|
|
need to know the next character read by @code{Gpm_getc} in order to
|
|
subsequently get it.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun int Gpm_CharsQueued (void);
|
|
|
|
It returns the number of characters (contained in @code{nbprevchar} index)
|
|
queued into the array @code{prevchar} by function @code{Gpm_Getc}.
|
|
This call is useful i.e. in recognition of function or arrow keys, when we
|
|
need to know the next character read by @code{Gpm_getc} in order to
|
|
subsequently get it.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun int Gpm_Getc (FILE *@var{f});
|
|
|
|
@deftypefunx int Gpm_Getchar (void);
|
|
|
|
|
|
These are intended to be replacements for @code{getc()} and
|
|
@code{getchar()} to be used by applications which are interested in the
|
|
mouse. Their external behaviour is the same as @code{getc()}, but a mouse
|
|
handler gets invoked whenever an event is available.
|
|
@xref{Handling Functions}.
|
|
A mouse handler can force @code{Gpm_Getc} to return a
|
|
specific value to the caller, and the ``simulated'' character is
|
|
signaled by setting @code{gpm_hflag} to 1.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun int Gpm_Wgetch (WINDOW *@var{win});
|
|
|
|
@deftypefunx int Gpm_Getch (void);
|
|
|
|
|
|
These are intended to be replacements for @code{wgetch()} and
|
|
@code{getch()} to be used by applications which are interested in the
|
|
mouse. They are the curses equivalent of @code{Gpm_Getchar}.
|
|
@end deftypefun
|
|
|
|
%--------------------------------------------------------------------------
|
|
@node Utility Functions, Extra Functions, Getting Events, Low Level Library
|
|
@subsection Utility Functions
|
|
%.........................................................................
|
|
@deftypefun int Gpm_Repeat (int @var{millisecs});
|
|
|
|
|
|
It returns 1 if no mouse events arrive in the next @var{millicecs}
|
|
milliseconds, 0 otherwise. It is meant to be used by those handlers
|
|
which need to repeat an action as long as the mouse button is pressed
|
|
(@code{while(Gpm_Repeat(200))@dots{}}).
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun int Gpm_DrawPointer (int @var{x}, int @var{y}, int @var{fd});
|
|
|
|
@deftypefunx int GPM_DRAWPOINTER (Gpm_Event *@var{ePtr};)
|
|
|
|
|
|
These are actually macros. They should be used to draw the mouse pointer after
|
|
mangling the screen (while dragging on a menu, say), because letting it to
|
|
the server won't work nicely, due to lack of synchronism between client and
|
|
server. The file descriptor should refer to the console. The return value is
|
|
0 on success and -1 on failure. @code{Gpm_DrawPointer} is obsolete, and is
|
|
retained only for compatibility.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun int Gpm_FitValuesM (int *@var{x}, int *@var{y}, int @var{margin});
|
|
|
|
@deftypefunx int Gpm_FitValues (@var{x},@var{y});
|
|
|
|
@deftypefunx void Gpm_FitEvent (@var{ePtr});
|
|
|
|
|
|
The first is a function, while the other are macros.
|
|
Note that @code{Gpm_FitEvent} does not return values.
|
|
These three procedures should be used to fit the pointer inside the visible
|
|
screen. They are needed for drag and release event. A connection
|
|
bit will be available in the future to force the pointer in the visible
|
|
region.
|
|
|
|
Note that fitting uses @code{gpm_mx} and @code{gpm_my}.
|
|
@xref{Variables}.
|
|
@end deftypefun
|
|
|
|
%--------------------------------------------------------------------------
|
|
@node Extra Functions, , Utility Functions, Low Level Library
|
|
@subsection Extra Functions
|
|
%.........................................................................
|
|
@deftypefun char* Gpm_GetLibVersion (int *@var{where});
|
|
|
|
|
|
This function returns a pointer to a static storage representing the
|
|
version number of the library. It is only available from 0.98.2 onward,
|
|
and returns a string like @samp{"0.98.2"}. The third number is optional,
|
|
and the second number will always be reported as two digits; thus 1.10 is
|
|
newer than 1.01. The @var{where} pointer, if not null, is used to store
|
|
a decimal number representing the version -- 0.98.2 is 9802 and 1.1.8 is
|
|
10108.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun char* Gpm_GetServerVersion (int *@var{where});
|
|
|
|
|
|
This function returns a pointer to a static storage representing the
|
|
version number of the server. The version is retrieved through
|
|
@code{popen()}, so it could fail (and return @code{NULL})if no @code{gpm} program
|
|
is in the current path. Alternatively, it could fail (and return a wrong
|
|
value) if the @code{gpm} in the path is not the currently running one.
|
|
The function is only available in the clientlibrary version 0.98.2 or
|
|
newer, but it works with any daemon, from 0.01 onward. The string returned
|
|
can be parsed in the same way as for @code{Gpm_GetLibVersion()}. A preparsed
|
|
version is stored in *@var{where} if @var{where} is not null. Both these
|
|
functions do their calculations only the first time they are invoked.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun int Gpm_GetSnapshot (Gpm_Event *@var{ePtr});
|
|
|
|
|
|
This function gives a non-blocking snapshot of the current situation:
|
|
it returns the number of mouse buttons, as known to the server, or -1
|
|
if that information is not available (under Xterm, or before connecting).
|
|
If @var{ePtr} is not null, it is filled with information about the current
|
|
state of the mouse. The fields have the following meaning: @code{x,y}: current
|
|
position of the cursor; @code{dx,dy} size of the window; @code{vc,modifiers} the
|
|
current console and the current shift state; @code{buttons} which buttons
|
|
are currently help down; @code{clicks} the number of clicks (0,1,2).
|
|
This function is only available from 0.98.2 onward, and will return -1
|
|
if run with an older server.
|
|
|
|
Since this information travels on the same file descriptor as the
|
|
events, and applications usually don't want to lose events, the function
|
|
returns 0 if the input queue is not empty.
|
|
|
|
@end deftypefun
|
|
|
|
|
|
%--------------------------------------------------------------------------
|
|
@node High Level Lib, Xterm, Low Level Library, The ClientLib
|
|
@section High Level Library
|
|
|
|
The high level library is part of the main @file{libgpm.a}, but it acts at
|
|
a different level of abstraction. The high level library depends in the
|
|
low-level one, so if you link your application with any object of the
|
|
high-level library, you're forced to link in the low-level one too.
|
|
|
|
If your application @emph{only} runs under xterm, please see
|
|
@file{gpm-xterm} in the @file{sample} subdirectory of the distribution,
|
|
which offers all the needed functionality.
|
|
|
|
The main role of the high-level library is to define a way to manage
|
|
windows (or "Regions of Interest" on your text screen). The regions
|
|
are arranged in a stack, and event are delivered to the different
|
|
windows according to their position both on the stack and on the screen.
|
|
@xref{hltest}.
|
|
|
|
@menu
|
|
* Concepts::
|
|
* hl-Variables::
|
|
* hl-Functions::
|
|
@end menu
|
|
|
|
%--------------------------------------------------------------------------
|
|
@node Concepts, hl-Variables, High Level Lib, High Level Lib
|
|
@subsection Concepts
|
|
|
|
The high-level library is completely independent of the low-level one,
|
|
so it uses @code{gpm_handler} and @code{gpm_data} as connection point with
|
|
@code{Gpm_Getc()}.
|
|
|
|
All the functionality is based on the concept of RoI's. each RoI is
|
|
described by a @code{Gpm_Roi} structure, which is made up by the following
|
|
fields:
|
|
@tindex Gpm_roi
|
|
|
|
@table @code
|
|
|
|
@item short xMin, xMax
|
|
These numbers identify the upper-left corner of the region.
|
|
When events are reported to the region, the event coordinate
|
|
will be relative to this position (zero-based).
|
|
|
|
@item short yMin, yMax
|
|
These numbers identify the lower-right corner of the region.
|
|
|
|
@item unsigned short minMod, maxMod
|
|
These modifier masks have the same role within the application as
|
|
the same fields have in inter-application multiplexing.
|
|
|
|
@item unsigned short eventMask
|
|
It is the mask of events which are to be reported to the current
|
|
region.
|
|
|
|
@item unsigned short owned
|
|
This is a bit, used to know if the region is owned by the
|
|
library or the application, in order to issue @code{free(0} when
|
|
needed.
|
|
|
|
@item Gpm_Handler *handler
|
|
The function to be called when events are to be reported to the
|
|
current region.
|
|
|
|
@item void *clientdata
|
|
The clientdata to be passed to the handler
|
|
|
|
@item Gpm_Roi *next, *prev
|
|
Links to the RoI chain.
|
|
|
|
@end table
|
|
|
|
%--------------------------------------------------------------------------
|
|
@node hl-Variables, hl-Functions, Concepts, High Level Lib
|
|
@subsection Variables
|
|
|
|
@table @code
|
|
@item Gpm_Roi* gpm_roi
|
|
The linked list of regions (pointer to the top one).
|
|
@vindex gpm_roi
|
|
|
|
@item Gpm_Roi* gpm_current_roi
|
|
The region which got the last event (used to generate enter and
|
|
leave events).
|
|
@vindex gpm_current_roi
|
|
|
|
@item Gpm_Handler* gpm_roi_handler
|
|
This variable is meant to be set by the user. It is the catch-all
|
|
region of interest, which will be called for any mouse event not
|
|
falling within any registered region. If NULL, the event will be
|
|
discarded.
|
|
@vindex gpm_roi_handler
|
|
|
|
@item void* gpm_roi_data
|
|
the client data to be passed to @code{gpm_roi_handler}.
|
|
@vindex gpm_roi_data
|
|
@end table
|
|
|
|
%--------------------------------------------------------------------------
|
|
@node hl-Functions, , hl-Variables, High Level Lib
|
|
@subsection Functions
|
|
|
|
|
|
|
|
%.........................................................................
|
|
@deftypefun Gpm_Roi* Gpm_PushRoi (int @var{xmin}, int @var{ymin}, int @var{xmax}, int @var{ymax},
|
|
int @var{mask}, Gpm_Handler *@var{fun}, void *@var{xtradata});
|
|
|
|
|
|
This function pushes a Region of Interest on top of the stack, after
|
|
allocating it and filling with the provided values. @var{fun} is the
|
|
function which will be called in order to handle events, and the
|
|
roi itself will be passed to the function as clientdata. The Roi is
|
|
represented by a @code{struct Gpm_Roi} structure, described in @file{gpm.h}.
|
|
The @code{xtradata} field will be used to fill the @code{xtradata} field in
|
|
@code{Gpm_Roi}.
|
|
the return value is the Roi just pushed (i.e. the top of stack).
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun char* Gpm_UseRoi (Gpm_Roi *@var{roi});
|
|
|
|
|
|
While @code{Gpm_PushRoi} has to allocate the Region before pushing it, this
|
|
function passes a pre-allocated function to the stack manager.
|
|
The return value is the Roi just used.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun Gpm_Roi* Gpm_PopRoi (Gpm_Roi *@var{roi});
|
|
|
|
Used to extract a Region of Interest from the stack, this function will
|
|
also clear the Region if it is needed.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun Gpm_Roi* Gpm_RaiseRoi (Gpm_Roi *@var{which}, Gpm_Roi *@var{before});
|
|
|
|
|
|
Raise the specified roi, either before the second Roi or at top-of-
|
|
stack (if @var{before} is @code{NULL}). The return value is the new top-of-stack.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun Gpm_Roi* Gpm_LowerRoi (Gpm_Roi *@var{which}, Gpm_Roi *@var{after});
|
|
|
|
|
|
Lower the specified roi, either after the second Roi or at bottom-of-
|
|
stack (if @var{before} is NULL). The return value is the new top-of-stack.
|
|
@end deftypefun
|
|
|
|
%.........................................................................
|
|
@deftypefun Gpm_Roi* Gpm_HandleRoi (Gpm_Event *@var{ePtr}, void * @var{clientdata});
|
|
|
|
|
|
This function, which should not be invoked by the user, is the dispatching
|
|
manager within the application for mouse events. This function will
|
|
browse the stack of regions of interest in order to notify windows about
|
|
Enter and Leave events (if they are interested in them), and then
|
|
delivers the current event to the relevant Roi.
|
|
|
|
If no Roi is interested in he event the @code{*gpm_roi_handler} function
|
|
is invoked (if not null), with null clientdata.
|
|
|
|
Reported events are all those in @code{Gpm_Event}, and also @code{GPM_ENTER}
|
|
and @code{GPM_LEAVE}. These can be used to toggle highlighting on a
|
|
button or to drop a menu if the menubutton is entered during a drag.
|
|
Remember that when Enter or Leave is notified, no other information in
|
|
the event item should be used.
|
|
|
|
|
|
@end deftypefun
|
|
|
|
|
|
%==========================================================================
|
|
@node Xterm, , High Level Lib, The ClientLib
|
|
@section Running under @code{xterm}
|
|
|
|
As of release 0.18, gpm-based applications can run under xterm
|
|
without any need for recompilation. The library is designed to convert
|
|
xterm mouse events to gpm-style structures, so that the client will get
|
|
the same events it got under the Linux console. Moreover, a source file
|
|
@file{sample/gpm-xterm.c} is available to mimic libgpm under a
|
|
different OS than Linux. Porting to other text-based consoles is an open
|
|
issue, but I myself have Linux alone.
|
|
|
|
The goal is to provide a uniform mouse interface with both xterm and the
|
|
Linux console. Some features of libgpm would not be available, but if
|
|
you run under xterm you know what you get, so you couldn't use them on
|
|
the console anyway.
|
|
|
|
The @file{sample} directory in the distribution tree is meant to show how
|
|
a simple mouse-sensitive application can be easily autoconfigured and
|
|
compiled. The @code{rmev} program has proved to compile and run smoothly
|
|
under Linux (both with and without @file{libgpm.a}), SunOS-4, Solaris-5,
|
|
hpux-8.x and Ultrix-3.0.
|
|
|
|
|
|
%##########################################################################
|
|
@node Demo Clients, Type Index, The ClientLib, Top
|
|
@chapter Demonstration Clients
|
|
|
|
@menu
|
|
* mev::
|
|
* sample/rmev::
|
|
* Emacs Support::
|
|
* gpm-root::
|
|
* hltest::
|
|
* mouse-test::
|
|
@end menu
|
|
|
|
%==========================================================================
|
|
@node mev, sample/rmev, Demo Clients, Demo Clients
|
|
@section @code{mev}
|
|
|
|
|
|
%MANPAGE mev.1
|
|
%M .TH MEV 1 "February 1995"
|
|
%M .UC 4
|
|
%M .SH NAME
|
|
%M mev \- a program to report mouse events
|
|
%M .SH SYNOPSIS
|
|
%M .B mev
|
|
%M [
|
|
%M .I options
|
|
%M ]
|
|
%M .br
|
|
%M .SH DESCRIPTION
|
|
%M The `mev' program is part of the gpm package.
|
|
%M
|
|
%M The information below is extracted from the texinfo file, which is the
|
|
%M preferred source of information.
|
|
|
|
The @code{mev} program is modeled after @code{xev}. It prints to @code{stdout} the
|
|
mouse console events it gets.
|
|
|
|
@code{mev}'s default behaviour is to get anything, but command line switches
|
|
can be used to set the various fields in the @code{Gpm_Connect} structure, in
|
|
order to customize the program's behaviour. I'm using @code{mev} to
|
|
handle mouse events to Emacs.
|
|
@xref{Emacs Support}.
|
|
|
|
Command line switches for @code{mev} are the following:
|
|
|
|
@table @code
|
|
@item -C @var{number}
|
|
Select a virtual console to get events from.
|
|
This is intended to be used for debugging.
|
|
|
|
@item -d @var{number}
|
|
Choose a default mask. By default the server gets
|
|
any events not belonging to the event mask. The mask can be
|
|
provided either as a
|
|
decimal number, or as a symbolic string.
|
|
|
|
@item -e @var{number}
|
|
Choose the event mask. By default any event
|
|
is received. The mask can be provided either as a
|
|
decimal number, or as a symbolic string.
|
|
|
|
@item -E
|
|
Enter emacs mode. In emacs mode events are reported as
|
|
lisp forms rather than numbers. This is the format used by the
|
|
t-mouse package within emacs.
|
|
|
|
@item -f
|
|
Fit events inside the screen before reporting them. This options
|
|
re-fits drag events, which are allowed to exit the screen border,
|
|
@xref{Margins}.
|
|
@item -i
|
|
Interactive. Accepts input from @code{stdin} to change connection
|
|
parameters.
|
|
|
|
@item -m @var{number}
|
|
Choose the minimum modifier mask. Any event with
|
|
fewer modifiers will not be reported to @code{mev}. It defaults to @samp{0}.
|
|
The mask must be provided either as a
|
|
decimal number, or as a symbolic string.
|
|
|
|
@item -M @var{number}
|
|
Choose the maximum modifier mask. Any event with
|
|
more modifier than specified will not be reported to @code{mev}.
|
|
It defaults to @samp{\~0}, i.e. all events are received.
|
|
The mask must be provided either as a
|
|
decimal number, or as a symbolic string.
|
|
|
|
@item -p
|
|
Requests to draw the pointer during drags. This option is used
|
|
by emacs to avoid invoking @code{ioctl()} from lisp code.
|
|
@end table
|
|
|
|
When the arguments are not decimal integers, they are considered lists
|
|
of alphanumeric characters, separated by a single non-alphanumeric
|
|
character. I use the comma (@samp{,}), but any will do.
|
|
|
|
Allowed names for events are @samp{move}, @samp{drag}, @samp{down} or
|
|
@samp{press}, @samp{up} or @samp{release}, @samp{motion} (which is both
|
|
@samp{move} and @samp{drag}), and @samp{hard}.
|
|
|
|
Allowed names for modifiers are @samp{shift}, @samp{leftAlt},
|
|
@samp{rightAlt}, @samp{anyAlt} (one or the other), @samp{control}.
|
|
|
|
When the @samp{-i} switch is specified, @code{mev} looks at its standard input as
|
|
command lines rather than events. The input lines are parsed, and the
|
|
commands @samp{push} and @samp{pop} are recognized.
|
|
|
|
The @samp{push} command, then, accepts the options @samp{-d}, @samp{-e}, @samp{-m}
|
|
and @samp{-M}, with the same meaning described above. Unspecified options
|
|
retain the previous value and the resulting masks are used to reopen
|
|
the connection with the server. @samp{pop} is used to pop the connection
|
|
stack. If an empty stack is popped the program exits.
|
|
|
|
Other commands recognized are @samp{info}, used to return the stack
|
|
depth; @samp{quit} to prematurely terminate the program; and
|
|
@samp{snapshot} to get some configuration information from the server.
|
|
|
|
@ignore
|
|
.SH BUGS
|
|
Beginning with release 1.16, \fBmev\fP no longer works under xterm.
|
|
Please use the \fBrmev\fP program (provided in the \fBsample\fP
|
|
directory) to watch gpm events under xterm or rxvt. \fBrmev\fP also
|
|
displays keyboard events besides mouse events.
|
|
|
|
.SH AUTHOR
|
|
Alessandro Rubini <rubini@linux.it>
|
|
.br
|
|
Ian Zimmerman <itz@speakeasy.org>
|
|
|
|
.SH FILES
|
|
.nf
|
|
/dev/gpmctl The socket used to connect to gpm.
|
|
.fi
|
|
|
|
.SH SEE ALSO
|
|
.nf
|
|
\fB gpm(8) \fP The mouse server
|
|
\fB gpm-root(1) \fP An handler for Control-Mouse events.
|
|
|
|
.fi
|
|
The info file about `gpm', which gives more complete information and
|
|
explains how to write a gpm client.
|
|
|
|
@end ignore
|
|
%MANPAGE END
|
|
|
|
%==========================================================================
|
|
@node sample/rmev, Emacs Support, mev, Demo Clients
|
|
@section @code{sample/rmev}
|
|
|
|
@code{rmev} is a reduced version of @code{mev}, but it is designed to be as
|
|
portable as possible. It uses a subset of the capabilities of @file{libgpm.a},
|
|
but works smoothly on both xterm and the Linux console. It is distributed
|
|
with @code{gpm} to show how a curses based application can support the mouse
|
|
with a small effort. Most of the xterm decoding is by Janne Kukonlehto.
|
|
@xref{Xterm}.
|
|
|
|
%==========================================================================
|
|
@node Emacs Support, gpm-root, sample/rmev, Demo Clients
|
|
@section Emacs Support
|
|
|
|
Emacs support is quite complete as of 0.14. The enclosed file
|
|
@file{t-mouse.el}, also available in byte-compiled form, is used to pass
|
|
mouse events to emacs. @file{t-mouse.elc} is installed in the correct
|
|
@t{site-lisp} directory for you emacs installation (as detected by the
|
|
configure phase).
|
|
|
|
Events with modifiers other than Meta, Control, and Shift are not
|
|
managed by the library. Managed events are passed to the lisp program,
|
|
which converts them to be similar to X mouse events inside
|
|
emacs. Actions are then invoked through a local keymap.
|
|
|
|
In my own environment I can use mouse-only and meta mouse within emacs,
|
|
shift-mouse to run selection and control-mouse to run @code{gpm-root}.
|
|
@xref{gpm-root}.
|
|
|
|
I suggest to put the following form in your own @file{.emacs} file, to
|
|
avoid loading @code{t-mouse} when you aren't working on the Linux console:
|
|
|
|
@lisp
|
|
(if (and (string-match ".*-linux" system-configuration)
|
|
(or (string-match "linux" (getenv "TERM"))
|
|
(string-match "con.*" (getenv "TERM"))))
|
|
(load-library "t-mouse"))
|
|
@end lisp
|
|
|
|
Mouse events are appended to the list variable
|
|
@code{unread-command-events} where the Emacs main event loop will find
|
|
them. They can be made to trigger any command (or interactive function,
|
|
in Emacs Lisp terminology) at all. Actually Emacs already comes with
|
|
reasonable bindings for most mouse events, so usually you won't have to
|
|
do anything beyond installing @code{t-mouse}. If you want to modify
|
|
what Emacs does in response to mouse events, please see
|
|
@ref{Keymaps,,,elisp}.
|
|
|
|
The scrollbar sits on the last column of the screen, though it is not
|
|
visible. When you click on the last column, a scroll-bar action is taken.
|
|
If this annoys you, again it can be turned off by changing the
|
|
appropriate Emacs keymap.
|
|
|
|
If you kill the @code{gpm} server, Emacs won't respond to mouse events
|
|
any more. If the server is then restarted, you can invoke `@kbd{M-x
|
|
t-mouse-run}' to restart mouse responsiveness in the editor.
|
|
|
|
%==========================================================================
|
|
@node gpm-root, hltest, Emacs Support, Demo Clients
|
|
@section The ``gpm-root'' program
|
|
|
|
%MANPAGE gpm-root.1
|
|
%M .TH GPM-ROOT 1 "February 1995"
|
|
%M .UC 4
|
|
%M .SH NAME
|
|
%M gpm-root \- a default handler for gpm, used to draw menus on
|
|
%M the root window
|
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%M
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%M .SH SYNOPSIS
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%M .B gpm-root
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%M [
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%M .I options
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%M ]
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%M .br
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%M .SH DESCRIPTION
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The program @code{gpm-root} is designed to handle Control-Mouse events to
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draw menus on the background of the current tty. The actual menus
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are described by a configuration file in the user's home directory.
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Please note that @code{gpm-root} needs to run with Linux 1.1.73 or
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newer, because previous kernels lack some screen handling capabilities
|
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required by the program.
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The program uses the files @file{/dev/vcs*} to draw to the console screen.
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These are available only from kernel 1.1.81 onward. If you miss those
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device nodes, you should create them using @code{create_vcs} in the
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distribution directory. The tool won't run with kernels older than 1.1.81,
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because they lacked a full screen dump/restore capability.
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Available command line options are the following:
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@table @code
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@item -m @var{number}
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Choose the modifier to use (by default: @samp{control}). The modifier
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can be provided either as a number or as a symbolic string.
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Allowed strings are @samp{shift}, @samp{anyAlt}, @samp{leftAlt},
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@samp{rightAlt}, @samp{control}.
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@item -u
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Deny using user-specific configuration files. With this
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option on, only @file{/etc/gpm-root.conf} will be used as a source
|
|
of configuration information. This option
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|
is intended for those system administrators who fear security could
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|
be broken by this daemon. Things should be sufficiently secure, but
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if you find a hole please tell me about it.
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@item -D
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|
Do not automatically enter background operation when started,
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and log messages to the standard error stream, not the syslog
|
|
mechanism. This is useful for debugging; in previous releases
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it was done with a compile-time option.
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|
@item -V @var{verbosity increment}
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|
Raise the maximum level of messages that will be logged. Thus a
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|
positive argument has the effect of making the program more
|
|
verbose. One can also give a negative argument to hush the
|
|
program; however, note that due to @b{getopt(3)} rules a negative
|
|
argument must follow the option with no space betwixt (that is,
|
|
@samp{-V-1} but not @samp{-V -1}). @xref{Program Arguments,,,libc}.
|
|
The argument is optional and its default value is 1.
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@end table
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Each time a menu is drawn, the configuration file is reparsed if it has
|
|
changed. This allows modification of personal setup without reinvoking
|
|
the daemon.
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%M The actual configuration file is better introduced by looking at your
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|
%M @file{/etc/gpm-root.conf}.
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%M
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%MSKIP
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The actual configuration file is better introduced by an example:
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|
@lisp
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# sample configuration file for gpm-root
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# edit it to suit your taste
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button 2 @{
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name "system status"
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foreground red
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background black
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border yellow
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head bright yellow
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"" f.nop
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|
"load: " f.load
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|
"free:" f.free
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|
"---------" f.nop
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|
"disk usage" f.bgcmd "du | sort -rn > /tmp/du"
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|
@}
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button 3 @{
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name "jump"
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|
foreground black
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background red
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border bright yellow
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head bright yellow
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|
"tty1" f.jptty "1"
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"tty2" f.jptty "2"
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"tty3" f.jptty "3"
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"tty4" f.jptty "4"
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"tty5" f.jptty "5"
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"tty6" f.jptty "6"
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|
"" f.nop
|
|
"more of them..." @{
|
|
"tty 17" f.jptty "17"
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@}
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@}
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|
@end lisp
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|
%M .fi
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|
|
The syntax for the file won't be described here, being it quite apparent
|
|
from the example above. Blanks and newlines are unused in parsing the
|
|
file, and the layout of the file is free. Comments are allowed in the
|
|
file: any hash mark (@samp{#}) found at the beginning of the line or
|
|
after white space makes the parser discard anything up to the next
|
|
line. To insert quotes (@samp{"}) in strings precede them with a backslash.
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|
|
|
Note that recursive menus are allowed, to any level of recursion.
|
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|
|
Keywords belong to three groups: the button keyword, the cfg
|
|
keywords and the action keywords. They are all described in the table
|
|
below:
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|
|
@table @code
|
|
@item button @var{number} @var{menu}
|
|
The @code{button} keyword is used to introduce a menu. It is
|
|
followed by the number of the relevant button (1=left,
|
|
2=middle, 3=right), an open brace, a menu and a closed brace.
|
|
A menu is made up of cfg statements, followed by
|
|
action statements. Cfg statements can come in any order,
|
|
while the order of action statements tells the actual order
|
|
in which actions will appear on the screen, top to bottom.
|
|
@end table
|
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|
|
The following statements belong to the cfg set.
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|
|
@table @code
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|
@item name @var{string}
|
|
If the @code{name} keyword is present, the specified
|
|
@var{string} will be used as the name for the current menu.
|
|
|
|
@item background @var{color}
|
|
This statements is used to specify the
|
|
background color to be used in the current menu. The @var{color}
|
|
can be specified with one of the eight canonical strings @samp{black},
|
|
@samp{red}, @samp{cyan} etc. The background defaults to black.
|
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|
|
@item foreground @var{color}
|
|
This statements is used to specify the
|
|
foreground color for menu items. Its value defaults to @samp{white}.
|
|
An optional @samp{bright} keyword can appear before the actual color.
|
|
|
|
@item border @var{color}
|
|
@code{border} is used to specify the
|
|
border color for the menu. Its value defaults to @samp{white}.
|
|
An optional @samp{bright} keyword can appear before the actual color.
|
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|
|
@item head @var{color}
|
|
@code{head} is used to specify the
|
|
foreground color for the title of the menu. Its value defaults
|
|
to @samp{white}.
|
|
An optional @samp{bright} keyword can appear before the actual color.
|
|
@end table
|
|
|
|
The following statements belong to the action set.
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|
|
|
@table @code
|
|
@item @var{string} f.fgcmd @var{cmdstring}
|
|
When the mouse button is
|
|
released above the corresponding menu item, the @var{cmdstring} is
|
|
pasted in the keyboard queue of the current console. This is
|
|
not yet implemented.
|
|
|
|
@item @var{string} f.bgcmd @var{cmdstring}
|
|
When the mouse button is released above the
|
|
corresponding menu item, a shell (@file{/bin/sh}) is forked to
|
|
execute the specified command, with @code{stdin}
|
|
connected to @file{/dev/null}, and @code{stdout}, @code{stderr} connected
|
|
to the active console.
|
|
|
|
@item @var{string} f.jptty @var{ttynumber}
|
|
When the mouse button is
|
|
released above the corresponding menu item, the console is
|
|
switched to the one specified. The @var{ttynumber} must be specified
|
|
as a string. Any tty can be reached this way, even those which are
|
|
not accessible via the keyboard.
|
|
|
|
@item @var{string} f.mktty @var{ttynumber}
|
|
When the mouse button is
|
|
released above the corresponding menu item, an unused console is
|
|
selected, and @file{/sbin/mingetty} is executed in it. The current console
|
|
is switched to the newly opened console. I use this command to save
|
|
kernel memory by opening a single console through @file{/etc/inittab}
|
|
and requesting the others only when i need to login.
|
|
|
|
@item @var{string} @var{Whole-menu}
|
|
A menu can directly follow the label string.
|
|
When the mouse pointer leaves the menu frame at the level of @var{string},
|
|
a second menu is posted on screen.
|
|
|
|
@item @var{string} f.lock
|
|
When the mouse button is
|
|
released above the corresponding menu item, the keyboard and the
|
|
screen are locked, and only the locking user or the superuser
|
|
can unlock them. This is not yet implemented.
|
|
|
|
@item @var{string} f.load
|
|
The current loadavg when the menu is posted is concatenated to @var{string}
|
|
to build the actual message displayed on screen. Nothing happens at
|
|
button release.
|
|
|
|
@item @var{string} f.free
|
|
The free memory and swap when the menu is posted is concatenated
|
|
to @var{string}
|
|
to build the actual message displayed on screen. Nothing happens at
|
|
button release.
|
|
|
|
@item @var{string} f.time
|
|
The current time is formatted with @b{strftime(3)}, according to
|
|
@var{string}. The resulting string is
|
|
the actual message displayed on screen. Nothing happens at
|
|
button release.
|
|
|
|
@item @var{string} f.pipe @var{cmdline}
|
|
When the mouse pointer leaves the menu frame at the level of @var{string},
|
|
a message box is posted on screen showing the last ten lines
|
|
of the output of @var{cmdline}. @var{cmdline} is executed
|
|
by @file{/bin/sh}. This is not yet implemented.
|
|
|
|
|
|
@item @var{string} f.nop
|
|
This does nothing, it only displays @var{string} on the menu.
|
|
@end table
|
|
|
|
The @code{HOME}, @code{LOGNAME} and @code{USER} environment variables are setup
|
|
to the values for the invoking user before spawning an external
|
|
process (@code{f.bgcmd}, @code{f.pipe}). The current directory is always @file{/}.
|
|
|
|
%M .SH BUGS
|
|
|
|
Known bugs have been fixed. In particular, if you invoke @code{gpm-root}
|
|
right after @code{gpm}, it will delay a few seconds before trying to connect
|
|
to the daemon.
|
|
|
|
@ignore
|
|
.SH AUTHOR
|
|
Alessandro Rubini <rubini@linux.it>
|
|
|
|
.SH FILES
|
|
.nf
|
|
/dev/gpmctl The socket used to connect to gpm.
|
|
/etc/gpm-root.conf The default configuration file.
|
|
$(HOME)/.gpm-root The user configuration file.
|
|
/dev/vcs* Virtual Console Screens
|
|
.fi
|
|
|
|
.SH SEE ALSO
|
|
.nf
|
|
\fB gpm(8) \fP
|
|
|
|
.fi
|
|
The info file about `gpm', which gives more complete information and
|
|
explains how to write a gpm client.
|
|
|
|
@end ignore
|
|
%MANPAGE END
|
|
|
|
%==========================================================================
|
|
@node hltest, mouse-test, gpm-root, Demo Clients
|
|
@section @code{hltest}
|
|
|
|
High-level test is a simple sample application using the high-level
|
|
library. It implements something like a window manager for text windows,
|
|
though it is small and unuseful.
|
|
|
|
The application is meant to be read by programmers trying to use the
|
|
high-level library. It is equipped with event reporting to help
|
|
in understanding the internal workings.
|
|
|
|
%==========================================================================
|
|
@node mouse-test, , hltest, Demo Clients
|
|
@section @code{mouse-test}
|
|
|
|
%MANPAGE mouse-test.1
|
|
%M .TH mouse-test 1 "March 26, 1998" ""
|
|
%M .SH NAME
|
|
%M mouse-test \- a tool for determining mouse type and device it's attached to.
|
|
%M .SH SYNTAX
|
|
%M \fBmouse-test\fR [ \fIdevice\fR ... ]
|
|
%M .SH DESCRIPTION
|
|
|
|
This experimental and incomplete application tries to help in detecting
|
|
which protocol does your mouse speak. It is able to detect MouseMan
|
|
devices, and to choose between @samp{-t ms} (three-buttons aware) and
|
|
@samp{-t bare} old two-buttons-only serial mice.
|
|
|
|
%M .SH BUGS
|
|
|
|
I know the application is buggy, but I only own one mouse device.
|
|
If you are interested in this application, just call me and awake me
|
|
from my laziness.
|
|
|
|
|
|
@ignore
|
|
.SS OPTIONS
|
|
.IP \fIdevice\fP
|
|
[ \fIdevice\fP ... ]
|
|
.PP
|
|
Check this \fIdevice\fP for a mouse. If no devices are listed, mouse-test will try all possible devices.
|
|
|
|
.SH AUTHOR
|
|
Alessandro Rubini <rubini@linux.it>
|
|
|
|
.SH FILES
|
|
.nf
|
|
/dev/* The devices used to search for a mouse
|
|
.fi
|
|
|
|
.SH SEE ALSO
|
|
.nf
|
|
gpm(8)
|
|
|
|
.fi
|
|
|
|
@end ignore
|
|
%MANPAGE END
|
|
|
|
%##########################################################################
|
|
@node Type Index, Function Index, Demo Clients, Top
|
|
@unnumbered Type Index
|
|
|
|
@printindex tp
|
|
|
|
@node Function Index, Variable Index, Type Index, Top
|
|
@unnumbered API Index
|
|
|
|
@printindex fn
|
|
|
|
@node Variable Index, , Function Index, Top
|
|
@unnumbered Variable Index
|
|
|
|
@printindex vr
|
|
|
|
%@iftex
|
|
%@unnumbered Table of Contents
|
|
%@contents
|
|
%@end iftex
|
|
|
|
|
|
@bye
|
|
|
|
/*
|
|
* This is because Linus uses 4-wide tabstops,
|
|
* forcing me to use the same default to manage kernel sources
|
|
*/
|
|
|
|
/* Local Variables: */
|
|
/* tab-width:8 */
|
|
/* End: */
|