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

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

45       containing, coordinates, root window
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49Tk                                                        Tk_CoordsToWindow(3)