Tk_CoordsToWindow(3) Tk Tk_CoordsToWindow(3)
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NAME
Tk_CoordsToWindow - Find window containing a point
SYNOPSIS
#include <tk.h>
Tk_Window
Tk_CoordsToWindow(rootX, rootY, tkwin)
ARGUMENTS
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.
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DESCRIPTION
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
containing, coordinates, root window
Page 1 (printed 2/26/99)
