ScrollPaneAdjustable.java 文件源码

/**
 * Sets the value of this scrollbar to the specified value.
 * <p>
 * If the value supplied is less than the current minimum or
 * greater than the current maximum, then one of those values is
 * substituted, as appropriate. Also, creates and dispatches
 * the AdjustementEvent with specified type and value.
 *
 * @param v the new value of the scrollbar
 * @param type the type of the scrolling operation occurred
 */
private void setTypedValue(int v, int type) {
    v = Math.max(v, minimum);
    v = Math.min(v, maximum - visibleAmount);

    if (v != value) {
        value = v;
        // Synchronously notify the listeners so that they are
        // guaranteed to be up-to-date with the Adjustable before
        // it is mutated again.
        AdjustmentEvent e =
            new AdjustmentEvent(this,
                    AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED,
                    type, value, isAdjusting);
        adjustmentListener.adjustmentValueChanged(e);
    }
}