1Tk_CoordsToWindow(3)         Tk Library Procedures        Tk_CoordsToWindow(3)
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NAME

8       Tk_CoordsToWindow - Find window containing a point
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SYNOPSIS

11       #include <tk.h>
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13       Tk_Window
14       Tk_CoordsToWindow(rootX, rootY, tkwin)
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ARGUMENTS

17       int rootX (in)                X-coordinate   (in  root  window  coordi‐
18                                     nates).
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20       int rootY (in)                Y-coordinate  (in  root  window   coordi‐
21                                     nates).
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23       Tk_Window tkwin (in)          Token for window that identifies applica‐
24                                     tion.
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DESCRIPTION

28       Tk_CoordsToWindow locates the window that contains a given point.   The
29       point  is specified in root coordinates with rootX and rootY (if a vir‐
30       tual-root window manager is in use then rootX and rootY are in the  co‐
31       ordinate system of the virtual root window).  The return value from the
32       procedure is a token for the window that contains the given point.   If
33       the  point  is not in any window, or if the containing window is not in
34       the same application as tkwin, then NULL is returned.
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36       The containing window is decided using the same  rules  that  determine
37       which  window  contains the mouse cursor:  if a parent and a child both
38       contain the point then the child gets preference, and if  two  siblings
39       both contain the point then the highest one in the stacking order (i.e.
40       the one that's visible on the screen) gets preference.
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KEYWORDS

43       containing, coordinates, root window
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47Tk                                                        Tk_CoordsToWindow(3)