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Annotation of 43BSDTahoe/new/X/Xlib/XUpdateMouse.c, revision 1.1

1.1     ! root        1: #include <X/mit-copyright.h>
        !             2: 
        !             3: /* $Header: XUpdateMouse.c,v 10.4 86/02/01 15:41:37 tony Rel $ */
        !             4: /* Copyright    Massachusetts Institute of Technology    1985  */
        !             5: 
        !             6: #include "XlibInternal.h"
        !             7: 
        !             8: extern _QEvent *_qfree;
        !             9: 
        !            10: /* Like XQueryMouse, but also reads pending events and flushes any MouseMoved
        !            11:  * events at the head of the queue.  A good way to track the mouse is to use
        !            12:  * a MouseMoved event as a "hint", by calling this routine to get up to date
        !            13:  * coordinates.
        !            14:  */
        !            15: 
        !            16: Status XUpdateMouse (w, x, y, subw)
        !            17:        Window w;
        !            18:        Window *subw;
        !            19:        int *x, *y;
        !            20: {
        !            21:        register Display *dpy;
        !            22:        register XReq *req;
        !            23:        register _QEvent *qelt;
        !            24:        XRep rep;
        !            25: 
        !            26:        XPending(dpy = _XlibCurrentDisplay);
        !            27:            /* read all events in socket's kernel buffer */
        !            28:        GetReq(X_QueryMouse, w);
        !            29:        if (!_XReply(dpy, &rep))
        !            30:            return(0);
        !            31:        while ((qelt = dpy->head) && qelt->event.type == MouseMoved) {
        !            32:            if ((dpy->head = qelt->next) == NULL)
        !            33:                dpy->tail = NULL;
        !            34:            qelt->next = _qfree;
        !            35:            _qfree = qelt;
        !            36:            dpy->qlen--;
        !            37:        }
        !            38:        *x = rep.param.s[2];
        !            39:        *y = rep.param.s[3];
        !            40:        *subw = rep.param.l[0];
        !            41:        return (1);
        !            42: }
        !            43: 

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