XMapWindow(3X)                                     XMapWindow(3X)



NAME
     XMapWindow, XMapRaised, XMapSubwindows - map windows

SYNOPSIS
     XMapWindow (display, w)
     Display *display;
     Window w;

     XMapRaised (display, w)
     Display *display;
     Window w;

     XMapSubwindows (display, w)
     Display *display;
     Window w;

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 be-
     comes 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 SubstructureRedirectMask on the
     parent window, the X server generates a MapRequest event,
     and the XMapWindow function does not map the window.  Other-
     wise, 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
     existing 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 window and
     if the client begins processing events, the window is paint-
     ed twice.  To avoid this, first ask for Expose events and
     then map the window, so the client processes input events as



November, 1990                                                  1

XMapWindow(3X)                                     XMapWindow(3X)



     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 window.
     This method usually leads to simpler programs and to proper
     interaction with window managers.

     The XMapRaised function maps the window and all associated
     subwindows which have had map requests and raises the speci-
     fied window to the top of the stack.

     The XMapSubwindows function maps all subwindows for a speci-
     fied window in top-to-bottom stacking order.  The X server
     generates an Expose event 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 the windows, rather than for
     each window.

   Arguments
     These functions accept the following arguments:

     display Specifies the connection to the X server.

     w       Specifies the window ID.

ERRORS
     BadWindow
             A value for a Window argument does not name a de-
             fined window.

     The XMapWindow, BadWindow, and XMapSubwindows functions can
     generate a BadWindow error.

SEE ALSO
     XChangeWindowAttributes(3X),
     XConfigureWindow(3X), XCreateWindow(3X),
     XDestroyWindow(3X), XRaiseWindow(3X),
     XUnmapWindow(3X)

     Xlib - C Language Interface
















2                                                  November, 1990