Tk_CoordsToWindow(3Tk)					Tk_CoordsToWindow(3Tk)

NAME    [Toc]    [Back]

     Tk_CoordsToWindow - Find window containing	a point

SYNOPSIS    [Toc]    [Back]

     #include <tk.h>

     Tk_Window
     Tk_CoordsToWindow(rootX, rootY, tkwin)

ARGUMENTS    [Toc]    [Back]

     int	 rootX	 (in)	   X-coordinate	(in root window	coordinates).

     int	 rootY	 (in)	   Y-coordinate	(in root window	coordinates).

     Tk_Window	 tkwin	 (in)	   Token for window that identifies
				   application.

DESCRIPTION    [Toc]    [Back]

     Tk_CoordsToWindow locates the window that contains	a given	point.	The
     point is specified	in root	coordinates with rootX and rootY (if a
     virtual-root window manager is in use then	rootX and rootY	are in the
     coordinate	system of the virtual root window).  The return	value from the
     procedure is a token for the window that contains the given point.	 If
     the point is not in any window, or	if the containing window is not	in the
     same application as tkwin,	then NULL is returned.

     The containing window is decided using the	same rules that	determine
     which window contains the mouse cursor:  if a parent and a	child both
     contain the point then the	child gets preference, and if two siblings
     both contain the point then the highest one in the	stacking order (i.e.
     the one that's visible on the screen) gets	preference.

KEYWORDS    [Toc]    [Back]

     containing, coordinates, root window


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