Tk_GetRootCoords - Compute root-window coordinates of window
Tk_GetRootCoords(tkwin, xPtr, yPtr)
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.
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.
coordinates, root window