Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!emory!stiatl!meo
From: meo@stiatl.UUCP (Miles O'Neal)
Newsgroups: comp.windows.x
Subject: Re: updating widget state after a wm move
Summary: use XQueryPointer ()
Keywords: cursor position, widget position
Message-ID: <8863@stiatl.UUCP>
Date: 6 Feb 90 16:22:29 GMT
Organization: Sales Technologies Inc., "The Prototype IS the Product..."
Lines: 37

In article <14274@cs.yale.edu> omtzigt-theo@CS.Yale.EDU (theo omtzigt) writes:
|
|To be able to pull down the menu at the right place, I am querying 
|the x and y position of both the form and the relative position of 
|the button. However, the state of the widget that I get back 
|through XtGetValues, is the position of the widget at realization, 
|which is not necessarily the position where the widget is, because
|the user may have moved the widget.

Use XQueryPointer - it returns the cursor position relative to both the
window it's in and the root window.

Example:

/* Code isn't optimal as I ripped out some other stuff we do */

GetXY (w, x, y)

Widget w;            /* widget cursor is currently in */
int *x, *y;          /* locs to hold new (x, y) */
{
   Display *D;       /* display the widget is on */
   Window W,         /* input window */
          rootW,     /* root window returned from XQueryPointer */
          childW;    /* child window returned from XQueryPointer */
   int rx,           /* root-relative x location of pointer */
       ry,           /* root-relative y location of pointer */
       wx,           /* widget-relative x location of pointer */
       wy;           /* widget-relative y location of pointer */
   unsigned int jive;      /* current mouse buttons */

   D = XtDisplay (w);
   W = XtWindow (w);
   XQueryPointer (D, W, &rootW, &childW, &rx, &ry, &wx, &wy, &jive);
   *x = rx;
   *y = ry;
}