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.
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