getrootcrd(3Tk)

NAME
     Tk_GetRootCoords - Compute root-window coordinates of window

SYNOPSIS
     #include <tk.h>

     Tk_GetRootCoords(tkwin, xPtr, yPtr)

ARGUMENTS
     Tk_Window   tkwin   (in)      Token for window.

     int         *xPtr   (out)     Pointer to location in which to store
                                   root-window x-coordinate corresponding to
                                   left edge of tkwin's border.

     int         *yPtr   (out)     Pointer to location in which to store
                                   root-window y-coordinate corresponding to
                                   top edge of tkwin's border.


DESCRIPTION
     This procedure scans through the structural information maintained by Tk
     to compute the root-window coordinates corresponding to the upper-left
     corner of tkwin's border.  If tkwin has no border, then Tk_GetRootCoords
     returns the root-window coordinates corresponding to location (0,0) in
     tkwin.  Tk_GetRootCoords is relatively efficient, since it doesn't have
     to communicate with the X server.


KEYWORDS
     coordinates, root window