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pTk/mTk/generic/tkBind.c  view on Meta::CPAN

	 * screen is no longer current.  Change the current display
	 * back again.
	 */

	screenPtr->curDispPtr = oldDispPtr;
	screenPtr->curScreenIndex = oldScreen;
	Tk_ChangeScreen(interp, oldDispPtr->name, oldScreen);
    }
    Tcl_SetObjResult(interp, savedResult);
    Tcl_DStringFree(&scripts);

    if (matchCount > 0) {
	if (!bindInfoPtr->deleted) {
	    /*
	     * Delete the pending list from the list of pending scripts
	     * for this window.
	     */

	    PendingBinding **curPtrPtr;

	    for (curPtrPtr = &bindInfoPtr->pendingList; ; ) {
		if (*curPtrPtr == pendingPtr) {
		    *curPtrPtr = pendingPtr->nextPtr;
		    break;
		}
		curPtrPtr = &(*curPtrPtr)->nextPtr;
	    }
	}
	if (pendingPtr != &staticPending) {
	    ckfree((char *) pendingPtr);
	}
    }
    Tcl_Release((ClientData) bindInfoPtr);
}

/*
 *---------------------------------------------------------------------------
 *
 * TkBindDeadWindow --
 *
 *	This procedure is invoked when it is determined that a window is
 *	dead.  It cleans up bind-related information about the window
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Any pending C bindings for this window are cancelled.
 *
 *---------------------------------------------------------------------------
 */

void
TkBindDeadWindow(winPtr)
    TkWindow *winPtr;		/* The window that is being deleted. */
{
    BindInfo *bindInfoPtr;
    PendingBinding *curPtr;

    /*
     * Certain special windows like those used for send and clipboard
     * have no mainPtr.
     */
    if (winPtr->mainPtr == NULL)
        return;

    bindInfoPtr = (BindInfo *) winPtr->mainPtr->bindInfo;
    curPtr = bindInfoPtr->pendingList;
    while (curPtr != NULL) {
	if (curPtr->tkwin == (Tk_Window) winPtr) {
	    curPtr->deleted = 1;
	}
	curPtr = curPtr->nextPtr;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * MatchPatterns --
 *
 *      Given a list of pattern sequences and a list of recent events,
 *      return the pattern sequence that best matches the event list,
 *	if there is one.
 *
 *	This procedure is used in two different ways.  In the simplest
 *	use, "object" is NULL and psPtr is a list of pattern sequences,
 *	each of which corresponds to a binding.  In this case, the
 *	procedure finds the pattern sequences that match the event list
 *	and returns the most specific of those, if there is more than one.
 *
 *	In the second case, psPtr is a list of pattern sequences, each
 *	of which corresponds to a definition for a virtual binding.
 *	In order for one of these sequences to "match", it must match
 *	the events (as above) but in addition there must be a binding
 *	for its associated virtual event on the current object.  The
 *	"object" argument indicates which object the binding must be for.
 *
 * Results:
 *      The return value is NULL if bestPtr is NULL and no pattern matches
 *	the recent events from bindPtr.  Otherwise the return value is
 *	the most specific pattern sequence among bestPtr and all those
 *	at psPtr that match the event list and object.  If a pattern
 *	sequence other than bestPtr is returned, then *bestCommandPtr
 *	is filled in with a pointer to the command from the best sequence.
 *
 * Side effects:
 *      None.
 *
 *----------------------------------------------------------------------
 */
static PatSeq *
MatchPatterns(dispPtr, bindPtr, psPtr, bestPtr, objectPtr, sourcePtrPtr)
    TkDisplay *dispPtr;		/* Display from which the event came. */
    BindingTable *bindPtr;	/* Information about binding table, such as
				 * ring of recent events. */
    PatSeq *psPtr;		/* List of pattern sequences. */
    PatSeq *bestPtr; 		/* The best match seen so far, from a
				 * previous call to this procedure.  NULL
				 * means no prior best match. */
    ClientData *objectPtr;	/* If NULL, the sequences at psPtr