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       XMapWindow, XMapRaised, XMapSubwindows - map windows


       int XMapWindow(Display *display, Window w);

       int XMapRaised(Display *display, Window w);

       int XMapSubwindows(Display *display, Window w);


       display   Specifies the connection to the X server.

       w         Specifies the window.


       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
       SubstructureRedirectMask  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
       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 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
       window.   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
       specified 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

       XMapSubwindows can generate a BadWindow error.


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


       XChangeWindowAttributes(3),  XConfigureWindow(3),   XCreateWindow(3),   XDestroyWindow(3),
       XRaiseWindow(3), XUnmapWindow(3)
       Xlib - C Language X Interface