| /* |
| * 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 javax.swing.*; |
| import javax.swing.event.ChangeListener; |
| import javax.swing.event.ChangeEvent; |
| import java.awt.*; |
| import java.awt.event.MouseWheelEvent; |
| import java.awt.peer.ScrollPanePeer; |
| import java.util.List; |
| |
| /** |
| * Lightweight implementation of {@link ScrollPanePeer}. Delegates most of the |
| * work to the {@link JScrollPane}. |
| */ |
| final class LWScrollPanePeer extends LWContainerPeer<ScrollPane, JScrollPane> |
| implements ScrollPanePeer, ChangeListener { |
| |
| LWScrollPanePeer(final ScrollPane target, |
| final PlatformComponent platformComponent) { |
| super(target, platformComponent); |
| } |
| |
| @Override |
| JScrollPane createDelegate() { |
| final JScrollPane sp = new JScrollPane(); |
| final JPanel panel = new JPanel(); |
| panel.setOpaque(false); |
| panel.setVisible(false); |
| sp.getViewport().setView(panel); |
| sp.setBorder(BorderFactory.createEmptyBorder()); |
| sp.getViewport().addChangeListener(this); |
| return sp; |
| } |
| |
| @Override |
| public void handleEvent(AWTEvent e) { |
| if (e instanceof MouseWheelEvent) { |
| MouseWheelEvent wheelEvent = (MouseWheelEvent) e; |
| //java.awt.ScrollPane consumes the event |
| // in case isWheelScrollingEnabled() is true, |
| // forcibly send the consumed event to the delegate |
| if (getTarget().isWheelScrollingEnabled() && wheelEvent.isConsumed()) { |
| sendEventToDelegate(wheelEvent); |
| } |
| } else { |
| super.handleEvent(e); |
| } |
| } |
| |
| @Override |
| public void stateChanged(final ChangeEvent e) { |
| SwingUtilities.invokeLater(new Runnable() { |
| @Override |
| public void run() { |
| final LWComponentPeer<?, ?> viewPeer = getViewPeer(); |
| if (viewPeer != null) { |
| final Rectangle r; |
| synchronized (getDelegateLock()) { |
| r = getDelegate().getViewport().getView().getBounds(); |
| } |
| viewPeer.setBounds(r.x, r.y, r.width, r.height, SET_BOUNDS, |
| true, true); |
| } |
| } |
| }); |
| } |
| |
| @Override |
| void initializeImpl() { |
| super.initializeImpl(); |
| final int policy = getTarget().getScrollbarDisplayPolicy(); |
| synchronized (getDelegateLock()) { |
| getDelegate().getViewport().setScrollMode(JViewport.SIMPLE_SCROLL_MODE); |
| getDelegate().setVerticalScrollBarPolicy(convertVPolicy(policy)); |
| getDelegate().setHorizontalScrollBarPolicy(convertHPolicy(policy)); |
| } |
| } |
| |
| LWComponentPeer<?, ?> getViewPeer() { |
| final List<LWComponentPeer<?, ?>> peerList = getChildren(); |
| return peerList.isEmpty() ? null : peerList.get(0); |
| } |
| |
| @Override |
| Rectangle getContentSize() { |
| Rectangle viewRect = getDelegate().getViewport().getViewRect(); |
| return new Rectangle(viewRect.width, viewRect.height); |
| } |
| |
| @Override |
| public void layout() { |
| super.layout(); |
| synchronized (getDelegateLock()) { |
| final LWComponentPeer<?, ?> viewPeer = getViewPeer(); |
| if (viewPeer != null) { |
| Component view = getDelegate().getViewport().getView(); |
| view.setBounds(viewPeer.getBounds()); |
| view.setPreferredSize(viewPeer.getPreferredSize()); |
| view.setMinimumSize(viewPeer.getMinimumSize()); |
| getDelegate().invalidate(); |
| getDelegate().validate(); |
| viewPeer.setBounds(view.getBounds()); |
| } |
| } |
| } |
| |
| @Override |
| public void setScrollPosition(int x, int y) { |
| } |
| |
| @Override |
| public int getHScrollbarHeight() { |
| synchronized (getDelegateLock()) { |
| return getDelegate().getHorizontalScrollBar().getHeight(); |
| } |
| } |
| |
| @Override |
| public int getVScrollbarWidth() { |
| synchronized (getDelegateLock()) { |
| return getDelegate().getVerticalScrollBar().getWidth(); |
| } |
| } |
| |
| @Override |
| public void childResized(int w, int h) { |
| synchronized (getDelegateLock()) { |
| getDelegate().invalidate(); |
| getDelegate().validate(); |
| } |
| } |
| |
| @Override |
| public void setUnitIncrement(Adjustable adj, int u) { |
| } |
| |
| @Override |
| public void setValue(Adjustable adj, int v) { |
| } |
| |
| private static int convertHPolicy(final int policy) { |
| switch (policy) { |
| case ScrollPane.SCROLLBARS_NEVER: |
| return ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER; |
| case ScrollPane.SCROLLBARS_ALWAYS: |
| return ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS; |
| default: |
| return ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED; |
| } |
| } |
| |
| private static int convertVPolicy(final int policy) { |
| switch (policy) { |
| case ScrollPane.SCROLLBARS_NEVER: |
| return ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER; |
| case ScrollPane.SCROLLBARS_ALWAYS: |
| return ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS; |
| default: |
| return ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED; |
| } |
| } |
| } |