Tk_CoordsToWindow(3) Tk Library Procedures 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

Tk Tk_CoordsToWindow(3)