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- .so man.macros
- .HS Tk_CoordsToWindow tkc
- .BS
- .SH NAME
- Tk_CoordsToWindow \- Find window containing a point
- .SH SYNOPSIS
- .nf
- \fB#include <tk.h>\fR
- .sp
- Tk_Window
- \fBTk_CoordsToWindow\fR(\fIrootX, rootY, tkwin\fR)
- .SH ARGUMENTS
- .AS Tk_Window tkwin
- .AP int rootX in
- X-coordinate (in root window coordinates).
- .AP int rootY in
- Y-coordinate (in root window coordinates).
- .AP Tk_Window tkwin in
- Token for window that identifies application.
- .BE
-
- .SH DESCRIPTION
- .PP
- \fBTk_CoordsToWindow\fR locates the window that contains a given point.
- The point is specified in root coordinates with \fIrootX\fR and
- .VS
- \fIrootY\fR (if a virtual-root window manager is in use then
- \fIrootX\fR and \fIrootY\fR are in the coordinate system of the
- virtual root window).
- .VE
- 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 \fItkwin\fR, then NULL is
- returned.
- .PP
- 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.
-
- .SH KEYWORDS
- containing, coordinates, root window
-