Tk Source Code

For \fBEnter\fR and \fBLeave\fR events, the position where the
mouse pointer crossed the window, relative to the receiving window.
For \fBConfigure\fR and \fBCreate\fR requests, the \fIx\fR and \fIy\fR
coordinates of the window relative to its parent window.
.IP \fB%A\fR 5
Substitutes the UNICODE character corresponding to the event, or
the empty string if the event does not correspond to a UNICODE character
(e.g. the shift key was pressed). \fBXmbLookupString\fR (or
(e.g. the shift key was pressed). On X11, \fBXmbLookupString\fR (or
\fBXLookupString\fR when input method support is turned off) does all
the work of translating from the event to a UNICODE character.
On X11, valid only for \fBKeyPress\fR event. On Windows and macOS/aqua,
Valid only for \fBKeyPress\fR and \fBKeyRelease\fR events.
valid only for \fBKeyPress\fR and \fBKeyRelease\fR events.
.IP \fB%B\fR 5
The \fIborder_width\fR field from the event.  Valid only for
\fBConfigure\fR, \fBConfigureRequest\fR, and \fBCreate\fR events.
.IP \fB%D\fR 5
This reports the \fIdelta\fR value of a \fBMouseWheel\fR event.  The
\fIdelta\fR value represents the rotation units the mouse wheel has
been moved. The sign of the value represents the direction the mouse

	len = 0;
	Tcl_DStringSetLength(dsPtr, len);
	goto done;
    }

#ifdef TK_USE_INPUT_METHODS
    if ((winPtr->dispPtr->flags & TK_DISPLAY_USE_IM)
	    && (winPtr->inputContext != NULL)
	    && (winPtr->inputContext != NULL)) {
	    && (eventPtr->type == KeyPress)) {
	Status status;

#if X_HAVE_UTF8_STRING
	Tcl_DStringSetLength(dsPtr, TCL_DSTRING_STATIC_SIZE-1);
	len = Xutf8LookupString(winPtr->inputContext, &eventPtr->xkey,
		Tcl_DStringValue(dsPtr), Tcl_DStringLength(dsPtr),
		&kePtr->keysym, &status);

	Tcl_DStringFree(&buf);
#endif /* X_HAVE_UTF8_STRING */
    } else
#endif /* TK_USE_INPUT_METHODS */
    {
	/*
	 * Fall back to convert a keyboard event to a UTF-8 string using
	 * XLookupString. This is used when input methods are turned off and
	 * XLookupString. This is used when input methods are turned off.
	 * for KeyRelease events.
	 *
	 * Note: XLookupString() normally returns a single ISO Latin 1 or
	 * ASCII control character.
	 */

	Tcl_DStringInit(&buf);
	Tcl_DStringSetLength(&buf, TCL_DSTRING_STATIC_SIZE-1);