Tk_CoordsToWindow(3) Tk Library Procedures Tk_CoordsToWindow(3)_________________________________________________________________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 iden-
tifies application.
_________________________________________________________________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 pro-
cedure is a token for the window that contains the given
point. If the point is not in any window, or if the con-
taining 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
Tk 1
