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 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 remem-
bered, the X server tiles the window with its background. If the win-
dow's background is undefined, the existing screen contents are not al-
tered, and the X server generates zero or more Expose events. If back-
ing-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 process-
ing 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 Ex-
pose 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
window.
XMapSubwindows can generate a BadWindow error.
DIAGNOSTICS
BadWindow A value for a Window argument does not name a defined Window.
SEE ALSO
XChangeWindowAttributes(3), XConfigureWindow(3), XCreateWindow(3), XDe-
stroyWindow(3), XRaiseWindow(3), XUnmapWindow(3)
Xlib - C Language X Interface
X Version 11 libX11 1.8.12 XMapWindow(3)
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