XQueryTree(3) XLIB FUNCTIONS XQueryTree(3)
NAME
XQueryTree - query window tree information
SYNTAX
Status XQueryTree(Display *
display, Window
w, Window *
root_return,
Window *
parent_return, Window **
children_return, unsigned int
*
nchildren_return);
ARGUMENTS
children_return Returns the list of children.
display Specifies the connection to the X server.
nchildren_return Returns the number of children.
parent_return Returns the parent window.
root_return Returns the root window.
w Specifies the window whose list of children, root, parent,
and number of children you want to obtain.
DESCRIPTION
The
XQueryTree function returns the root ID, the parent window ID, a
pointer to the list of children windows (NULL when there are no
children), and the number of children in the list for the specified
window. The children are listed in current stacking order, from
bottom-most (first) to top-most (last).
XQueryTree returns zero if
it fails and nonzero if it succeeds. To free a non-NULL children
list when it is no longer needed, use
XFree.
XQueryTree can generate a
BadWindow error.
BUGS
This really should return a screen *, not a root window ID.
DIAGNOSTICS
BadWindow A value for a Window argument does not name a defined
Window.
SEE ALSO
XFree(3),
XGetWindowAttributes(3),
XQueryPointer(3) Xlib - C Language X InterfaceX Version 11 libX11 1.8.10 XQueryTree(3)
