am ae807e1d: Force reevaluation if mChangedValue is true

        clearCache();

    }

    /**

     * Start asynchronous result evaluation of formula.

     * Will result in display on completion.

     * @param required result was explicitly requested by user.

     */

    private void reevaluateResult(boolean required) {

        clearCache();

        mEvaluator = new AsyncDisplayResult(mDegreeMode, required);

        mEvaluator.execute();

        mChangedValue = false;

    }

    // Begin evaluation of result and display when ready.

    // We assume this is called after each insertion and deletion.

    // Thus if we are called twice with the same effective end of

            // Already done or in progress.

            return;

        }

        clearCache();

        // In very odd cases, there can be significant latency to evaluate.

        // Don't show obsolete result.

        mResult.clear();

        mEvaluator = new AsyncDisplayResult(mDegreeMode, false);

        mEvaluator.execute();

        mChangedValue = false;

        reevaluateResult(false);

    }

    // Ensure that we either display a result or complain.

    // We presume that any prior result was computed using the same

    // expression.

    void requireResult() {

        if (mCache == null) {

        if (mCache == null || mChangedValue) {

            // Restart evaluator in requested mode, i.e. with longer timeout.

            cancelAll(true);

            clearCache();

            mEvaluator = new AsyncDisplayResult(mDegreeMode, true);

            mEvaluator.execute();

            reevaluateResult(true);

        } else {

            // Notify immediately, reusing existing result.

            int dotPos = mCache.indexOf('.');