Tk_CoordsToWindow(3) Tk Library Procedures Tk_CoordsToWindow(3) 







Tk_CoordsToWindow - Find window containing a point








#include <tk.h>

Tk_Window
Tk_CoordsToWindow(rootX, rootY, tkwin)









  
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.
    
    

    

  










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.










containing, coordinates, root window







  

    
    Tk