Tk_GetRootCoords(3)

Tk_GetRootCoords(3)   Tk Library Procedures   Tk_GetRootCoords(3)

_________________________________________________________________

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
     does not have to communicate with the X server.

KEYWORDS

     coordinates, root window

Tk                        Last change:                          1