Linux Certif

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Tk_GetRootCoords.3tk

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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.

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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