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