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<HTML><HEAD><TITLE>Xlib Programming Manual: Inter-Client Communication Functions</TITLE></HEAD><BODY><H1 ALIGN=center>Chapter 14: Inter-Client Communication Functions</H1>The <B><A HREF="/gui/x/icccm/">Inter-Client Communication Conventions Manual</A></B>,hereafter referred to as the ICCCM, details theX Consortium approved conventions that govern inter-client communications.These conventions ensure peer-to-peer client cooperation in the use of selections, cut buffers, and shared resources as well as client cooperationwith window and session managers.For further information,see the <B><A HREF="/gui/x/icccm/">Inter-Client Communication Conventions Manual</A></B>.<P>Xlib provides a number of standard properties and programming interfacesthat are <A HREF="/gui/x/icccm/">ICCCM</A> compliant.The predefined atoms for some of these properties are defined in the<B><TT>X11/Xatom.h</TT></B>header file, whereto avoid name conflicts with user symbols their<B<#define</B>name has an XA_ prefix.For further information about atoms and properties,see section "<A HREF="../window-information/properties-and-atoms.html">Properties and Atoms</A>".<P>Xlib's selection and cut buffer mechanisms provide the primary programming interfaces by which peer client applications communicate with each other (see sections "<A HREF="../window-information/selection.html">Selections</A>" and "<A HREF="../utilities/using-cut-buffers.html">Using Cut Buffers</A>").The functions discussed in this chapter provide the primary programming interfaces by which client applications communicate with their window and session managers as well as share standard colormaps.<P>The standard properties that are of special interest for communicating with window and session managers are:<!.IN "Atom" "predefined"><TABLE><TR><TD COLSPAN=4><HR><TR><TD><B>Name</B> <TD><B>Type</B> <TH>Format <TD><B>Description</B><TR><TD COLSPAN=4><HR><TR><TD><TT>WM_CLASS</TT> <TD><TT>STRING <TD ALIGN=center>8 <TD>Set by application programs to allow window and session managers to obtain the application's resources from the resource database.<TR><TD><TT>WM_CLIENT_MACHINE</TT> <TD><TT>TEXT <TD> <TD>The string name of the machine on which the client application is running.<TR><TD><TT>WM_COLORMAP_WINDOWS</TT> <TD><TT>WINDOW <TD ALIGN=center>32 <TD>The list of window IDs that may need a different colormap than that of their top-level window.<TR><TD><TT>WM_COMMAND</TT> <TD><TT>TEXT <TD> <TD>The command and arguments, null-separated, used to invoke the application.<TR><TD><TT>WM_HINTS</TT> <TD><TT>WM_HINTS <TD ALIGN=center>32 <TD>Additional hints set by the client for use by the window manager. The C type of this property is <B><B><A HREF="client-to-window-manager/wm-hints.html#XWMHints">XWMHints</A></B></B>.<TR><TD><TT>WM_ICON_NAME</TT> <TD><TT>TEXT <TD> <TD>The name to be used in an icon.<TR><TD><TT>WM_ICON_SIZE</TT> <TD><TT>WM_ICON_SIZE <TD ALIGN=center>32 <TD>The window manager may set this property on the root window to specify the icon sizes it supports. The C type of this property is <B><B><A HREF="client-to-window-manager/wm-icon-size.html#XIconSize">XIconSize</A></B></B>.<TR><TD><TT>WM_NAME</TT> <TD><TT>TEXT <TD> <TD>The name of the application.<TR><TD><TT>WM_NORMAL_HINTS</TT> <TD><TT>WM_SIZE_HINTS <TD ALIGN=center>32 <TD>Size hints for a window in its normal state. The C type of this property is <B><A HREF="client-to-window-manager/wm-normal-hints.html#XSizeHints">XSizeHints</A></B>.<TR><TD><TT>WM_PROTOCOLS</TT> <TD><TT>ATOM <TD ALIGN=center>32 <TD>List of atoms that identify the communications protocols between the client and window manager in which the client is willing to participate.<TR><TD><TT>WM_STATE</TT> <TD><TT>WM_STATE <TD ALIGN=center>32 <TD>Intended for communication between window and session managers only.<TR><TD><TT>WM_TRANSIENT_FOR</TT> <TD><TT>WINDOW <TD ALIGN=center>32 <TD>Set by application programs to indicate to the window manager that a transient top-level window, such as a dialog box.<TR><TD COLSPAN=4><HR></TABLE><P>The remainder of this chapter discusses:<UL><P><LI><A HREF="client-to-window-manager/">Client-to-window-manager communication</A><P><LI><A HREF="client-to-session-manager/">Client-to-session-manager communication</A><P><LI><A HREF="standard-colormaps/">Standard colormaps</A></UL><H5 ALIGN=right><I>Next: <A HREF="client-to-window-manager/">Client to Window Manager Communication</A></I></H5><HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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