Tk_GetRootCoords (3)
Compute root-window coordinates of window
SYNOPSIS
#include <tk.h>
Tk_GetRootCoords(tkwin, xPtr, yPtr)
ARGUMENTS
Tk_Window tkwin
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
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