NAME

Tk_GetRootCoords − Compute root-window coordinates of window

SYNOPSIS

#include <tk.h>
Tk_GetRootCoords(tkwin, xPtr, yPtr)

ARGUMENTS

Tk_Windowtkwin(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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