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X11R7.4 - man page for xmapwindow (x11r4 section 3)

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XMapWindow(3)				  XLIB FUNCTIONS			    XMapWindow(3)

NAME
       XMapWindow, XMapRaised, XMapSubwindows - map windows

SYNTAX
       int XMapWindow(Display *display, Window w);

       int XMapRaised(Display *display, Window w);

       int XMapSubwindows(Display *display, Window w);

ARGUMENTS
       display	 Specifies the connection to the X server.

       w	 Specifies the window.

DESCRIPTION
       The XMapWindow function maps the window and all of its subwindows that have had map
       requests.  Mapping a window that has an unmapped ancestor does not display the window but
       marks it as eligible for display when the ancestor becomes mapped.  Such a window is
       called unviewable.  When all its ancestors are mapped, the window becomes viewable and
       will be visible on the screen if it is not obscured by another window.  This function has
       no effect if the window is already mapped.

       If the override-redirect of the window is False and if some other client has selected Sub-
       structureRedirectMask on the parent window, then the X server generates a MapRequest
       event, and the XMapWindow function does not map the window.  Otherwise, the window is
       mapped, and the X server generates a MapNotify event.

       If the window becomes viewable and no earlier contents for it are remembered, the X server
       tiles the window with its background.  If the window's background is undefined, the exist-
       ing screen contents are not altered, and the X server generates zero or more Expose
       events.	If backing-store was maintained while the window was unmapped, no Expose events
       are generated.  If backing-store will now be maintained, a full-window exposure is always
       generated.  Otherwise, only visible regions may be reported.  Similar tiling and exposure
       take place for any newly viewable inferiors.

       If the window is an InputOutput window, XMapWindow generates Expose events on each
       InputOutput window that it causes to be displayed.  If the client maps and paints the win-
       dow and if the client begins processing events, the window is painted twice.  To avoid
       this, first ask for Expose events and then map the window, so the client processes input
       events as usual.  The event list will include Expose for each window that has appeared on
       the screen.  The client's normal response to an Expose event should be to repaint the win-
       dow.  This method usually leads to simpler programs and to proper interaction with window
       managers.

       XMapWindow can generate a BadWindow error.

       The XMapRaised function essentially is similar to XMapWindow in that it maps the window
       and all of its subwindows that have had map requests.  However, it also raises the speci-
       fied window to the top of the stack.

       XMapRaised can generate a BadWindow error.

       The XMapSubwindows function maps all subwindows for a specified window in top-to-bottom
       stacking order.	The X server generates Expose events on each newly displayed window.
       This may be much more efficient than mapping many windows one at a time because the server
       needs to perform much of the work only once, for all of the windows, rather than for each
       window.

       XMapSubwindows can generate a BadWindow error.

DIAGNOSTICS
       BadWindow A value for a Window argument does not name a defined Window.

SEE ALSO
       XChangeWindowAttributes(3X11), XConfigureWindow(3X11), XCreateWindow(3X11), XDestroyWin-
       dow(3X11), XRaiseWindow(3X11), XUnmapWindow(3X11)
       Xlib - C Language X Interface

X Version 11				   libX11 1.2.1 			    XMapWindow(3)
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