jdk/src/java.desktop/macosx/classes/sun/lwawt/LWListPeer.java - platform/libcore - Git at Google

 /*
  * 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.*;
 import java.awt.*;
 import java.awt.event.*;
 import java.awt.peer.ListPeer;
 import java.util.Arrays;

 /**
  * Lightweight implementation of {@link ListPeer}. Delegates most of the work to
  * the {@link JList}, which is placed inside {@link JScrollPane}.
  */
 final class LWListPeer extends LWComponentPeer<List, LWListPeer.ScrollableJList>
         implements ListPeer {

     /**
      * The default number of visible rows.
      */
     private static final int DEFAULT_VISIBLE_ROWS = 4; // From java.awt.List,

     /**
      * This text is used for cell bounds calculation.
      */
     private static final String TEXT = "0123456789abcde";

     LWListPeer(final List target, final PlatformComponent platformComponent) {
         super(target, platformComponent);
         if (!getTarget().isBackgroundSet()) {
             getTarget().setBackground(SystemColor.text);
         }
     }

     @Override
     ScrollableJList createDelegate() {
         return new ScrollableJList();
     }

     @Override
     void initializeImpl() {
         super.initializeImpl();
         setMultipleMode(getTarget().isMultipleMode());
         final int[] selectedIndices = getTarget().getSelectedIndexes();
         synchronized (getDelegateLock()) {
             getDelegate().setSkipStateChangedEvent(true);
             getDelegate().getView().setSelectedIndices(selectedIndices);
             getDelegate().setSkipStateChangedEvent(false);
         }
     }

     @Override
     public boolean isFocusable() {
         return true;
     }

     @Override
     Component getDelegateFocusOwner() {
         return getDelegate().getView();
     }

     @Override
     public int[] getSelectedIndexes() {
         synchronized (getDelegateLock()) {
             return getDelegate().getView().getSelectedIndices();
         }
     }

     @Override
     public void add(final String item, final int index) {
         synchronized (getDelegateLock()) {
             getDelegate().getModel().add(index, item);
             revalidate();
         }
     }

     @Override
     public void delItems(final int start, final int end) {
         synchronized (getDelegateLock()) {
             getDelegate().getModel().removeRange(start, end);
             revalidate();
         }
     }

     @Override
     public void removeAll() {
         synchronized (getDelegateLock()) {
             getDelegate().getModel().removeAllElements();
             revalidate();
         }
     }

     @Override
     public void select(final int index) {
         synchronized (getDelegateLock()) {
             getDelegate().setSkipStateChangedEvent(true);
             getDelegate().getView().setSelectedIndex(index);
             getDelegate().setSkipStateChangedEvent(false);
         }
     }

     @Override
     public void deselect(final int index) {
         synchronized (getDelegateLock()) {
             getDelegate().getView().getSelectionModel().
                     removeSelectionInterval(index, index);
         }
     }

     @Override
     public void makeVisible(final int index) {
         synchronized (getDelegateLock()) {
             getDelegate().getView().ensureIndexIsVisible(index);
         }
     }

     @Override
     public void setMultipleMode(final boolean m) {
         synchronized (getDelegateLock()) {
             getDelegate().getView().setSelectionMode(m ?
                     ListSelectionModel.MULTIPLE_INTERVAL_SELECTION
                     : ListSelectionModel.SINGLE_SELECTION);
         }
     }

     @Override
     public Dimension getPreferredSize() {
         return getMinimumSize();
     }

     @Override
     public Dimension getMinimumSize() {
         return getMinimumSize(DEFAULT_VISIBLE_ROWS);
     }

     @Override
     public Dimension getPreferredSize(final int rows) {
         return getMinimumSize(rows);
     }

     @Override
     public Dimension getMinimumSize(final int rows) {
         synchronized (getDelegateLock()) {
             final Dimension size = getCellSize();
             size.height *= rows;
             // Always take vertical scrollbar into account.
             final JScrollBar vbar = getDelegate().getVerticalScrollBar();
             size.width += vbar != null ? vbar.getMinimumSize().width : 0;
             // JScrollPane and JList insets
             final Insets pi = getDelegate().getInsets();
             final Insets vi = getDelegate().getView().getInsets();
             size.width += pi.left + pi.right + vi.left + vi.right;
             size.height += pi.top + pi.bottom + vi.top + vi.bottom;
             return size;
         }
     }

     private Dimension getCellSize() {
         final JList<String> jList = getDelegate().getView();
         final ListCellRenderer<? super String> cr = jList.getCellRenderer();
         final Component cell = cr.getListCellRendererComponent(jList, TEXT, 0,
                                                                false, false);
         return cell.getPreferredSize();
     }

     private void revalidate() {
         synchronized (getDelegateLock()) {
             getDelegate().getView().invalidate();
             getDelegate().validate();
         }
     }

     @SuppressWarnings("serial")// Safe: outer class is non-serializable.
     final class ScrollableJList extends JScrollPane implements ListSelectionListener {

         private boolean skipStateChangedEvent;

         private final DefaultListModel<String> model =
                 new DefaultListModel<String>() {
                     @Override
                     public void add(final int index, final String element) {
                         if (index == -1) {
                             addElement(element);
                         } else {
                             super.add(index, element);
                         }
                     }
                 };

         private int[] oldSelectedIndices = new int[0];

         ScrollableJList() {
             getViewport().setScrollMode(JViewport.SIMPLE_SCROLL_MODE);
             final JList<String> list = new JListDelegate();
             list.addListSelectionListener(this);

             getViewport().setView(list);

             // Pull the items from the target.
             final String[] items = getTarget().getItems();
             for (int i = 0; i < items.length; i++) {
                 model.add(i, items[i]);
             }
         }

         public boolean isSkipStateChangedEvent() {
             return skipStateChangedEvent;
         }

         public void setSkipStateChangedEvent(boolean skipStateChangedEvent) {
             this.skipStateChangedEvent = skipStateChangedEvent;
         }

         @Override
         @SuppressWarnings("unchecked")
         public void valueChanged(final ListSelectionEvent e) {
             if (!e.getValueIsAdjusting() && !isSkipStateChangedEvent()) {
                 final JList<?> source = (JList<?>) e.getSource();
                 for(int i = 0 ; i < source.getModel().getSize(); i++) {

                     final boolean wasSelected = Arrays.binarySearch(oldSelectedIndices, i) >= 0;
                     final boolean isSelected = source.isSelectedIndex(i);

                     if (wasSelected == isSelected) {
                         continue;
                     }

                     final int state = !wasSelected && isSelected ? ItemEvent.SELECTED: ItemEvent.DESELECTED;

                     LWListPeer.this.postEvent(new ItemEvent(getTarget(), ItemEvent.ITEM_STATE_CHANGED,
                             i, state));
                 }
                 oldSelectedIndices = source.getSelectedIndices();
             }
         }

         @SuppressWarnings("unchecked")
         public JList<String> getView() {
             return (JList<String>) getViewport().getView();
         }

         public DefaultListModel<String> getModel() {
             return model;
         }

         @Override
         public void setEnabled(final boolean enabled) {
             getView().setEnabled(enabled);
             super.setEnabled(enabled);
         }

         @Override
         public void setOpaque(final boolean isOpaque) {
             super.setOpaque(isOpaque);
             if (getView() != null) {
                 getView().setOpaque(isOpaque);
             }
         }

         @Override
         public void setFont(Font font) {
             super.setFont(font);
             if (getView() != null) {
                 getView().setFont(font);
                 LWListPeer.this.revalidate();
             }
         }

         private final class JListDelegate extends JList<String> {

             JListDelegate() {
                 super(model);
             }

             @Override
             public boolean hasFocus() {
                 return getTarget().hasFocus();
             }

             @Override
             @SuppressWarnings("deprecation")
             protected void processMouseEvent(final MouseEvent e) {
                 super.processMouseEvent(e);
                 if (e.getID() == MouseEvent.MOUSE_CLICKED && e.getClickCount() == 2) {
                     final int index = locationToIndex(e.getPoint());
                     if (0 <= index && index < getModel().getSize()) {
                         LWListPeer.this.postEvent(new ActionEvent(getTarget(), ActionEvent.ACTION_PERFORMED,
                             getModel().getElementAt(index), e.getWhen(), e.getModifiers()));
                     }
                 }
             }

             @Override
             @SuppressWarnings("deprecation")
             protected void processKeyEvent(final KeyEvent e) {
                 super.processKeyEvent(e);
                 if (e.getID() == KeyEvent.KEY_PRESSED && e.getKeyCode() == KeyEvent.VK_ENTER) {
                     final String selectedValue = getSelectedValue();
                     if(selectedValue != null){
                         LWListPeer.this.postEvent(new ActionEvent(getTarget(), ActionEvent.ACTION_PERFORMED,
                             selectedValue, e.getWhen(), e.getModifiers()));
                     }
                 }
             }

             //Needed for Autoscroller.
             @Override
             public Point getLocationOnScreen() {
                 return LWListPeer.this.getLocationOnScreen();
             }
         }
     }
 }
	/*
	* 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.*;
	import java.awt.*;
	import java.awt.event.*;
	import java.awt.peer.ListPeer;
	import java.util.Arrays;

	/**
	* Lightweight implementation of {@link ListPeer}. Delegates most of the work to
	* the {@link JList}, which is placed inside {@link JScrollPane}.
	*/
	final class LWListPeer extends LWComponentPeer<List, LWListPeer.ScrollableJList>
	implements ListPeer {

	/**
	* The default number of visible rows.
	*/
	private static final int DEFAULT_VISIBLE_ROWS = 4; // From java.awt.List,

	/**
	* This text is used for cell bounds calculation.
	*/
	private static final String TEXT = "0123456789abcde";

	LWListPeer(final List target, final PlatformComponent platformComponent) {
	super(target, platformComponent);
	if (!getTarget().isBackgroundSet()) {
	getTarget().setBackground(SystemColor.text);
	}
	}

	@Override
	ScrollableJList createDelegate() {
	return new ScrollableJList();
	}

	@Override
	void initializeImpl() {
	super.initializeImpl();
	setMultipleMode(getTarget().isMultipleMode());
	final int[] selectedIndices = getTarget().getSelectedIndexes();
	synchronized (getDelegateLock()) {
	getDelegate().setSkipStateChangedEvent(true);
	getDelegate().getView().setSelectedIndices(selectedIndices);
	getDelegate().setSkipStateChangedEvent(false);
	}
	}

	@Override
	public boolean isFocusable() {
	return true;
	}

	@Override
	Component getDelegateFocusOwner() {
	return getDelegate().getView();
	}

	@Override
	public int[] getSelectedIndexes() {
	synchronized (getDelegateLock()) {
	return getDelegate().getView().getSelectedIndices();
	}
	}

	@Override
	public void add(final String item, final int index) {
	synchronized (getDelegateLock()) {
	getDelegate().getModel().add(index, item);
	revalidate();
	}
	}

	@Override
	public void delItems(final int start, final int end) {
	synchronized (getDelegateLock()) {
	getDelegate().getModel().removeRange(start, end);
	revalidate();
	}
	}

	@Override
	public void removeAll() {
	synchronized (getDelegateLock()) {
	getDelegate().getModel().removeAllElements();
	revalidate();
	}
	}

	@Override
	public void select(final int index) {
	synchronized (getDelegateLock()) {
	getDelegate().setSkipStateChangedEvent(true);
	getDelegate().getView().setSelectedIndex(index);
	getDelegate().setSkipStateChangedEvent(false);
	}
	}

	@Override
	public void deselect(final int index) {
	synchronized (getDelegateLock()) {
	getDelegate().getView().getSelectionModel().
	removeSelectionInterval(index, index);
	}
	}

	@Override
	public void makeVisible(final int index) {
	synchronized (getDelegateLock()) {
	getDelegate().getView().ensureIndexIsVisible(index);
	}
	}

	@Override
	public void setMultipleMode(final boolean m) {
	synchronized (getDelegateLock()) {
	getDelegate().getView().setSelectionMode(m ?
	ListSelectionModel.MULTIPLE_INTERVAL_SELECTION
	: ListSelectionModel.SINGLE_SELECTION);
	}
	}

	@Override
	public Dimension getPreferredSize() {
	return getMinimumSize();
	}

	@Override
	public Dimension getMinimumSize() {
	return getMinimumSize(DEFAULT_VISIBLE_ROWS);
	}

	@Override
	public Dimension getPreferredSize(final int rows) {
	return getMinimumSize(rows);
	}

	@Override
	public Dimension getMinimumSize(final int rows) {
	synchronized (getDelegateLock()) {
	final Dimension size = getCellSize();
	size.height *= rows;
	// Always take vertical scrollbar into account.
	final JScrollBar vbar = getDelegate().getVerticalScrollBar();
	size.width += vbar != null ? vbar.getMinimumSize().width : 0;
	// JScrollPane and JList insets
	final Insets pi = getDelegate().getInsets();
	final Insets vi = getDelegate().getView().getInsets();
	size.width += pi.left + pi.right + vi.left + vi.right;
	size.height += pi.top + pi.bottom + vi.top + vi.bottom;
	return size;
	}
	}

	private Dimension getCellSize() {
	final JList<String> jList = getDelegate().getView();
	final ListCellRenderer<? super String> cr = jList.getCellRenderer();
	final Component cell = cr.getListCellRendererComponent(jList, TEXT, 0,
	false, false);
	return cell.getPreferredSize();
	}

	private void revalidate() {
	synchronized (getDelegateLock()) {
	getDelegate().getView().invalidate();
	getDelegate().validate();
	}
	}

	@SuppressWarnings("serial")// Safe: outer class is non-serializable.
	final class ScrollableJList extends JScrollPane implements ListSelectionListener {

	private boolean skipStateChangedEvent;

	private final DefaultListModel<String> model =
	new DefaultListModel<String>() {
	@Override
	public void add(final int index, final String element) {
	if (index == -1) {
	addElement(element);
	} else {
	super.add(index, element);
	}
	}
	};

	private int[] oldSelectedIndices = new int[0];

	ScrollableJList() {
	getViewport().setScrollMode(JViewport.SIMPLE_SCROLL_MODE);
	final JList<String> list = new JListDelegate();
	list.addListSelectionListener(this);

	getViewport().setView(list);

	// Pull the items from the target.
	final String[] items = getTarget().getItems();
	for (int i = 0; i < items.length; i++) {
	model.add(i, items[i]);
	}
	}

	public boolean isSkipStateChangedEvent() {
	return skipStateChangedEvent;
	}

	public void setSkipStateChangedEvent(boolean skipStateChangedEvent) {
	this.skipStateChangedEvent = skipStateChangedEvent;
	}

	@Override
	@SuppressWarnings("unchecked")
	public void valueChanged(final ListSelectionEvent e) {
	if (!e.getValueIsAdjusting() && !isSkipStateChangedEvent()) {
	final JList<?> source = (JList<?>) e.getSource();
	for(int i = 0 ; i < source.getModel().getSize(); i++) {

	final boolean wasSelected = Arrays.binarySearch(oldSelectedIndices, i) >= 0;
	final boolean isSelected = source.isSelectedIndex(i);

	if (wasSelected == isSelected) {
	continue;
	}

	final int state = !wasSelected && isSelected ? ItemEvent.SELECTED: ItemEvent.DESELECTED;

	LWListPeer.this.postEvent(new ItemEvent(getTarget(), ItemEvent.ITEM_STATE_CHANGED,
	i, state));
	}
	oldSelectedIndices = source.getSelectedIndices();
	}
	}

	@SuppressWarnings("unchecked")
	public JList<String> getView() {
	return (JList<String>) getViewport().getView();
	}

	public DefaultListModel<String> getModel() {
	return model;
	}

	@Override
	public void setEnabled(final boolean enabled) {
	getView().setEnabled(enabled);
	super.setEnabled(enabled);
	}

	@Override
	public void setOpaque(final boolean isOpaque) {
	super.setOpaque(isOpaque);
	if (getView() != null) {
	getView().setOpaque(isOpaque);
	}
	}

	@Override
	public void setFont(Font font) {
	super.setFont(font);
	if (getView() != null) {
	getView().setFont(font);
	LWListPeer.this.revalidate();
	}
	}

	private final class JListDelegate extends JList<String> {

	JListDelegate() {
	super(model);
	}

	@Override
	public boolean hasFocus() {
	return getTarget().hasFocus();
	}

	@Override
	@SuppressWarnings("deprecation")
	protected void processMouseEvent(final MouseEvent e) {
	super.processMouseEvent(e);
	if (e.getID() == MouseEvent.MOUSE_CLICKED && e.getClickCount() == 2) {
	final int index = locationToIndex(e.getPoint());
	if (0 <= index && index < getModel().getSize()) {
	LWListPeer.this.postEvent(new ActionEvent(getTarget(), ActionEvent.ACTION_PERFORMED,
	getModel().getElementAt(index), e.getWhen(), e.getModifiers()));
	}
	}
	}

	@Override
	@SuppressWarnings("deprecation")
	protected void processKeyEvent(final KeyEvent e) {
	super.processKeyEvent(e);
	if (e.getID() == KeyEvent.KEY_PRESSED && e.getKeyCode() == KeyEvent.VK_ENTER) {
	final String selectedValue = getSelectedValue();
	if(selectedValue != null){
	LWListPeer.this.postEvent(new ActionEvent(getTarget(), ActionEvent.ACTION_PERFORMED,
	selectedValue, e.getWhen(), e.getModifiers()));
	}
	}
	}

	//Needed for Autoscroller.
	@Override
	public Point getLocationOnScreen() {
	return LWListPeer.this.getLocationOnScreen();
	}
	}
	}
	}