| /* |
| * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package sun.lwawt; |
| |
| import java.awt.Adjustable; |
| import java.awt.Scrollbar; |
| import java.awt.event.AdjustmentEvent; |
| import java.awt.event.AdjustmentListener; |
| import java.awt.peer.ScrollbarPeer; |
| |
| import javax.swing.JScrollBar; |
| |
| /** |
| * Lightweight implementation of {@link ScrollbarPeer}. Delegates most of the |
| * work to the {@link JScrollBar}. |
| */ |
| final class LWScrollBarPeer extends LWComponentPeer<Scrollbar, JScrollBar> |
| implements ScrollbarPeer, AdjustmentListener { |
| |
| // JScrollBar fires two changes with firePropertyChange (one for old value |
| // and one for new one. |
| // We save the last value and don't fire event if not changed. |
| private int currentValue; |
| |
| LWScrollBarPeer(final Scrollbar target, |
| final PlatformComponent platformComponent) { |
| super(target, platformComponent); |
| } |
| |
| @Override |
| JScrollBar createDelegate() { |
| return new JScrollBar(); |
| } |
| |
| @Override |
| void initializeImpl() { |
| super.initializeImpl(); |
| final Scrollbar target = getTarget(); |
| setLineIncrement(target.getUnitIncrement()); |
| setPageIncrement(target.getBlockIncrement()); |
| setValues(target.getValue(), target.getVisibleAmount(), |
| target.getMinimum(), target.getMaximum()); |
| |
| final int orientation = target.getOrientation(); |
| final JScrollBar delegate = getDelegate(); |
| synchronized (getDelegateLock()) { |
| delegate.setOrientation(orientation == Scrollbar.HORIZONTAL |
| ? Adjustable.HORIZONTAL |
| : Adjustable.VERTICAL); |
| delegate.addAdjustmentListener(this); |
| } |
| } |
| |
| @Override |
| public void setValues(final int value, final int visible, final int minimum, |
| final int maximum) { |
| synchronized (getDelegateLock()) { |
| currentValue = value; |
| getDelegate().setValues(value, visible, minimum, maximum); |
| } |
| } |
| |
| @Override |
| public void setLineIncrement(final int l) { |
| synchronized (getDelegateLock()) { |
| getDelegate().setUnitIncrement(l); |
| } |
| } |
| |
| @Override |
| public void setPageIncrement(final int l) { |
| synchronized (getDelegateLock()) { |
| getDelegate().setBlockIncrement(l); |
| } |
| } |
| |
| // Peer also registered as a listener for ComponentDelegate component |
| @Override |
| public void adjustmentValueChanged(final AdjustmentEvent e) { |
| final int value = e.getValue(); |
| synchronized (getDelegateLock()) { |
| if (currentValue == value) { |
| return; |
| } |
| currentValue = value; |
| } |
| getTarget().setValueIsAdjusting(e.getValueIsAdjusting()); |
| getTarget().setValue(value); |
| postEvent(new AdjustmentEvent(getTarget(), e.getID(), |
| e.getAdjustmentType(), value, |
| e.getValueIsAdjusting())); |
| } |
| } |