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XQueryTree

Section: XLIB FUNCTIONS (3)
Updated: libX11 1.6.3
Index Return to Main Contents
 

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 Interface


 

Index

NAME
SYNTAX
ARGUMENTS
DESCRIPTION
BUGS
DIAGNOSTICS
SEE ALSO


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