ImageCombo.java

/*******************************************************************************
 * Copyright (c) 2000, 2015 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Tom Seidel      - enhancements for image-handling
 *     Wind River Systems - adopted from org.eclipse.cdt.internal.ui.ImageCombo
 *******************************************************************************/

package org.eclipse.tcf.te.ui.swt.widgets;

import java.util.Arrays;

import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.accessibility.ACC;
import org.eclipse.swt.accessibility.AccessibleAdapter;
import org.eclipse.swt.accessibility.AccessibleControlAdapter;
import org.eclipse.swt.accessibility.AccessibleControlEvent;
import org.eclipse.swt.accessibility.AccessibleEvent;
import org.eclipse.swt.accessibility.AccessibleTextAdapter;
import org.eclipse.swt.accessibility.AccessibleTextEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Layout;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.TypedListener;
import org.eclipse.swt.widgets.Widget;

/**
 * The ImageCombo class represents a selectable user interface object
 * that combines a text field and a table and issues notification
 * when an item is selected from the table.
 * <p>
 * Note that although this class is a subclass of <code>Composite</code>,
 * it does not make sense to add children to it, or set a layout on it.
 * </p>
 * <dl>
 * <dt><b>Styles:</b>
 * <dd>BORDER, READ_ONLY, FLAT</dd>
 * <dt><b>Events:</b>
 * <dd>Selection</dd>
 * </dl>
 */
public final class ImageCombo extends Composite {

	Label image;
	Text text;
	Table table;
	int visibleItemCount = 5;
	Shell popup;
	Button arrow;
	boolean hasFocus;
	Listener listener, filter;
	Color foreground, background;
	Font font;

	/**
	 * Constructs a new instance of this class given its parent
	 * and a style value describing its behavior and appearance.
	 * <p>
	 * The style value is either one of the style constants defined in
	 * class <code>SWT</code> which is applicable to instances of this
	 * class, or must be built by <em>bitwise OR</em>'ing together
	 * (that is, using the <code>int</code> "|" operator) two or more
	 * of those <code>SWT</code> style constants. The class description
	 * lists the style constants that are applicable to the class.
	 * Style bits are also inherited from superclasses.
	 * </p>
	 *
	 * @param parent a widget which will be the parent of the new instance (cannot be null)
	 * @param style the style of widget to construct
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
	 * </ul>
	 *
	 * @see SWT#BORDER
	 * @see SWT#READ_ONLY
	 * @see SWT#FLAT
	 * @see Widget#getStyle()
	 */
	public ImageCombo (Composite parent, int style) {
		super (parent, style = checkStyle (style));

		int textStyle = SWT.SINGLE;
		if ((style & SWT.READ_ONLY) != 0) textStyle |= SWT.READ_ONLY;
		if ((style & SWT.FLAT) != 0) textStyle |= SWT.FLAT;
		image = new Label (this, SWT.NONE);
		text = new Text (this, textStyle);
		int arrowStyle = SWT.ARROW | SWT.DOWN;
		if ((style & SWT.FLAT) != 0) arrowStyle |= SWT.FLAT;
		arrow = new Button (this, arrowStyle);

		listener = new Listener () {
			@Override
			public void handleEvent (Event event) {
				if (popup == event.widget) {
					popupEvent (event);
					return;
				}
				if (text == event.widget) {
					textEvent (event);
					return;
				}
				if (table == event.widget) {
					listEvent (event);
					return;
				}
				if (arrow == event.widget) {
					arrowEvent (event);
					return;
				}
				if (ImageCombo.this == event.widget) {
					comboEvent (event);
					return;
				}
				if (getShell () == event.widget) {
					handleFocus (SWT.FocusOut);
				}
			}
		};
		filter = new Listener() {
			@Override
			public void handleEvent(Event event) {
				Shell shell = ((Control)event.widget).getShell ();
				if (shell == ImageCombo.this.getShell ()) {
					handleFocus (SWT.FocusOut);
				}
			}
		};

		int [] comboEvents = {SWT.Dispose, SWT.Move, SWT.Resize};
		for (int i=0; i<comboEvents.length; i++) this.addListener (comboEvents [i], listener);

		int [] textEvents = {SWT.KeyDown, SWT.KeyUp, SWT.Modify, SWT.MouseDown, SWT.MouseUp, SWT.Traverse, SWT.FocusIn};
		for (int i=0; i<textEvents.length; i++) text.addListener (textEvents [i], listener);

		int [] arrowEvents = {SWT.Selection, SWT.FocusIn};
		for (int i=0; i<arrowEvents.length; i++) arrow.addListener (arrowEvents [i], listener);

		createPopup( -1);
		initAccessible();
	}
	static int checkStyle (int style) {
		int mask = SWT.BORDER | SWT.READ_ONLY | SWT.FLAT | SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT;
		return style & mask;
	}
	/**
	 * Adds the argument to the end of the receiver's list.
	 *
	 * @param string the new item
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @see #add(String,int)
	 */
	public void add (String string, Image image) {
		checkWidget();
		if (string == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
		TableItem newItem = new TableItem(this.table,SWT.NONE);
		newItem.setText(string);
		if (image != null) newItem.setImage(image);
	}
	/**
	 * Adds the argument to the receiver's list at the given
	 * zero-relative index.
	 * <p>
	 * Note: To add an item at the end of the list, use the
	 * result of calling <code>getItemCount()</code> as the
	 * index or use <code>add(String)</code>.
	 * </p>
	 *
	 * @param string the new item
	 * @param index the index for the item
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
	 *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list (inclusive)</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @see #add(String)
	 */
	public void add (String string,Image image, int index) {
		checkWidget();
		if (string == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
		TableItem newItem = new TableItem(this.table,SWT.NONE,index);
		if (image != null) newItem.setImage(image);
	}
	/**
	 * Adds the listener to the collection of listeners who will
	 * be notified when the receiver's text is modified, by sending
	 * it one of the messages defined in the <code>ModifyListener</code>
	 * interface.
	 *
	 * @param listener the listener which should be notified
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @see ModifyListener
	 * @see #removeModifyListener
	 */
	public void addModifyListener (ModifyListener listener) {
		checkWidget();
		if (listener == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
		TypedListener typedListener = new TypedListener (listener);
		addListener (SWT.Modify, typedListener);
	}
	/**
	 * Adds the listener to the collection of listeners who will
	 * be notified when the receiver's selection changes, by sending
	 * it one of the messages defined in the <code>SelectionListener</code>
	 * interface.
	 * <p>
	 * <code>widgetSelected</code> is called when the combo's list selection changes.
	 * <code>widgetDefaultSelected</code> is typically called when ENTER is pressed the combo's text area.
	 * </p>
	 *
	 * @param listener the listener which should be notified
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @see SelectionListener
	 * @see #removeSelectionListener
	 * @see SelectionEvent
	 */
	public void addSelectionListener(SelectionListener listener) {
		checkWidget();
		if (listener == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
		TypedListener typedListener = new TypedListener (listener);
		addListener (SWT.Selection,typedListener);
		addListener (SWT.DefaultSelection,typedListener);
	}
	void arrowEvent (Event event) {
		switch (event.type) {
		case SWT.FocusIn: {
			handleFocus (SWT.FocusIn);
			break;
		}
		case SWT.Selection: {
			dropDown (!isDropped ());
			break;
		}
		}
	}
	/**
	 * Sets the selection in the receiver's text field to an empty
	 * selection starting just before the first character. If the
	 * text field is editable, this has the effect of placing the
	 * i-beam at the start of the text.
	 * <p>
	 * Note: To clear the selected items in the receiver's list,
	 * use <code>deselectAll()</code>.
	 * </p>
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @see #deselectAll
	 */
	public void clearSelection () {
		checkWidget ();
		text.clearSelection ();
		table.deselectAll ();
	}
	void comboEvent (Event event) {
		switch (event.type) {
		case SWT.Dispose:
			if (popup != null && !popup.isDisposed ()) {
				table.removeListener (SWT.Dispose, listener);
				popup.dispose ();
			}
			Shell shell = getShell ();
			shell.removeListener (SWT.Deactivate, listener);
			Display display = getDisplay ();
			display.removeFilter (SWT.FocusIn, filter);
			popup = null;
			text = null;
			table = null;
			arrow = null;
			break;
		case SWT.Move:
			dropDown (false);
			break;
		case SWT.Resize:
			internalLayout (false);
			break;
		}
	}

	@Override
	public Point computeSize (int wHint, int hHint, boolean changed) {
		checkWidget ();
		int width = 0, height = 0;
		String[] items = getStringsFromTable();
		int textWidth = 0;
		GC gc = new GC (text);
		int spacer = gc.stringExtent (" ").x; //$NON-NLS-1$
		for (int i = 0; i < items.length; i++) {
			textWidth = Math.max (gc.stringExtent (items[i]).x, textWidth);
		}
		gc.dispose();
		Point textSize = text.computeSize (SWT.DEFAULT, SWT.DEFAULT, changed);
		Point arrowSize = arrow.computeSize (SWT.DEFAULT, SWT.DEFAULT, changed);
		Point listSize = table.computeSize (wHint, SWT.DEFAULT, changed);
		int borderWidth = getBorderWidth ();

		height = Math.max (hHint, Math.max (textSize.y, arrowSize.y) + 2*borderWidth);
		width = Math.max (wHint, Math.max (textWidth + 2*spacer + arrowSize.x + 2*borderWidth, listSize.x));
		return new Point (width, height);
	}
	void createPopup(int selectionIndex) {
		// create shell and list
		popup = new Shell (getShell (), SWT.NO_TRIM | SWT.ON_TOP);
		int style = getStyle ();
		int listStyle = SWT.SINGLE | SWT.V_SCROLL;
		if ((style & SWT.FLAT) != 0) listStyle |= SWT.FLAT;
		if ((style & SWT.RIGHT_TO_LEFT) != 0) listStyle |= SWT.RIGHT_TO_LEFT;
		if ((style & SWT.LEFT_TO_RIGHT) != 0) listStyle |= SWT.LEFT_TO_RIGHT;
		// create a table instead of a list.
		table = new Table (popup, listStyle);
		if (font != null) table.setFont (font);
		if (foreground != null) table.setForeground (foreground);
		if (background != null) table.setBackground (background);

		int [] popupEvents = {SWT.Close, SWT.Paint, SWT.Deactivate};
		for (int i=0; i<popupEvents.length; i++) popup.addListener (popupEvents [i], listener);
		int [] listEvents = {SWT.MouseUp, SWT.Selection, SWT.Traverse, SWT.KeyDown, SWT.KeyUp, SWT.FocusIn, SWT.Dispose};
		for (int i=0; i<listEvents.length; i++) table.addListener (listEvents [i], listener);

		if (selectionIndex != -1) table.setSelection (selectionIndex);
	}
	/**
	 * Deselects the item at the given zero-relative index in the receiver's
	 * list.  If the item at the index was already deselected, it remains
	 * deselected. Indices that are out of range are ignored.
	 *
	 * @param index the index of the item to deselect
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void deselect (int index) {
		checkWidget ();
		table.deselect (index);
	}
	/**
	 * Deselects all selected items in the receiver's list.
	 * <p>
	 * Note: To clear the selection in the receiver's text field,
	 * use <code>clearSelection()</code>.
	 * </p>
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @see #clearSelection
	 */
	public void deselectAll () {
		checkWidget ();
		table.deselectAll ();
	}
	void dropDown (boolean drop) {
		if (drop == isDropped ()) return;
		if (!drop) {
			popup.setVisible (false);
			if (!isDisposed ()&& arrow.isFocusControl()) {
				//	            setFocus();
			}
			return;
		}

		if (getShell() != popup.getParent ()) {
			//	        TableItem[] items = table.getItems ();
			int selectionIndex = table.getSelectionIndex ();
			table.removeListener (SWT.Dispose, listener);
			popup.dispose();
			popup = null;
			table = null;
			createPopup (selectionIndex);
		}

		Point size = getSize ();
		int itemCount = table.getItemCount ();
		itemCount = (itemCount == 0) ? visibleItemCount : Math.min(visibleItemCount, itemCount);
		int itemHeight = table.getItemHeight () * itemCount;
		Point listSize = table.computeSize (SWT.DEFAULT, itemHeight, false);
		table.setBounds (1, 1, Math.max (size.x - 2, listSize.x), listSize.y);

		int index = table.getSelectionIndex ();
		if (index != -1) table.setTopIndex (index);
		Display display = getDisplay ();
		Rectangle listRect = table.getBounds ();
		Rectangle parentRect = display.map (getParent (), null, getBounds ());
		Point comboSize = getSize ();
		Rectangle displayRect = getMonitor ().getClientArea ();
		int width = Math.max (comboSize.x, listRect.width + 2);
		int height = listRect.height + 2;
		int x = parentRect.x;
		int y = parentRect.y + comboSize.y;
		if (y + height > displayRect.y + displayRect.height) y = parentRect.y - height;
		popup.setBounds (x, y, width, height);
		popup.setVisible (true);
		table.setFocus ();
	}
	/*
	 * Return the Label immediately preceding the receiver in the z-order,
	 * or null if none.
	 */
	Label getAssociatedLabel () {
		Control[] siblings = getParent ().getChildren ();
		for (int i = 0; i < siblings.length; i++) {
			if (siblings [i] == ImageCombo.this) {
				if (i > 0 && siblings [i-1] instanceof Label) {
					return (Label) siblings [i-1];
				}
			}
		}
		return null;
	}
	@Override
	public Control [] getChildren () {
		checkWidget();
		return new Control [0];
	}
	/**
	 * Gets the editable state.
	 *
	 * @return whether or not the reciever is editable
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @since 3.0
	 */
	public boolean getEditable () {
		checkWidget ();
		return text.getEditable();
	}
	/**
	 * Returns the item at the given, zero-relative index in the
	 * receiver's list. Throws an exception if the index is out
	 * of range.
	 *
	 * @param index the index of the item to return
	 * @return the item at the given index
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public TableItem getItem (int index) {
		checkWidget();
		return this.table.getItem (index);
	}
	/**
	 * Returns the number of items contained in the receiver's list.
	 *
	 * @return the number of items
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public int getItemCount () {
		checkWidget ();
		return table.getItemCount ();
	}
	/**
	 * Returns the height of the area which would be used to
	 * display <em>one</em> of the items in the receiver's list.
	 *
	 * @return the height of one item
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public int getItemHeight () {
		checkWidget ();
		return table.getItemHeight ();
	}
	/**
	 * Returns an array of <code>String</code>s which are the items
	 * in the receiver's list.
	 * <p>
	 * Note: This is not the actual structure used by the receiver
	 * to maintain its list of items, so modifying the array will
	 * not affect the receiver.
	 * </p>
	 *
	 * @return the items in the receiver's list
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public TableItem [] getItems () {
		checkWidget ();
		return table.getItems ();
	}
	char getMnemonic (String string) {
		int index = 0;
		int length = string.length ();
		do {
			while ((index < length) && (string.charAt (index) != '&')) index++;
			if (++index >= length) return '\0';
			if (string.charAt (index) != '&') return string.charAt (index);
			index++;
		} while (index < length);
		return '\0';
	}

	String [] getStringsFromTable()
	{
		String[] items  = new String[this.table.getItems().length];
		for (int i = 0, n = items.length; i < n; i++) {
			items[i]=this.table.getItem(i).getText();
		}
		return items;
	}
	/**
	 * Returns a <code>Point</code> whose x coordinate is the start
	 * of the selection in the receiver's text field, and whose y
	 * coordinate is the end of the selection. The returned values
	 * are zero-relative. An "empty" selection as indicated by
	 * the the x and y coordinates having the same value.
	 *
	 * @return a point representing the selection start and end
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public Point getSelection () {
		checkWidget ();
		return text.getSelection ();
	}
	/**
	 * Returns the zero-relative index of the item which is currently
	 * selected in the receiver's list, or -1 if no item is selected.
	 *
	 * @return the index of the selected item
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public int getSelectionIndex () {
		checkWidget ();
		return table.getSelectionIndex ();
	}
	@Override
	public int getStyle () {
		int style = super.getStyle ();
		style &= ~SWT.READ_ONLY;
		if (!getEditable()) style |= SWT.READ_ONLY;
		return style;
	}
	/**
	 * Returns a string containing a copy of the contents of the
	 * receiver's text field.
	 *
	 * @return the receiver's text
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public String getText () {
		checkWidget ();
		return text.getText ();
	}
	/**
	 * Returns the height of the receivers's text field.
	 *
	 * @return the text height
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public int getTextHeight () {
		checkWidget ();
		return text.getLineHeight ();
	}
	/**
	 * Returns the maximum number of characters that the receiver's
	 * text field is capable of holding. If this has not been changed
	 * by <code>setTextLimit()</code>, it will be the constant
	 * <code>Combo.LIMIT</code>.
	 *
	 * @return the text limit
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public int getTextLimit () {
		checkWidget ();
		return text.getTextLimit ();
	}
	/**
	 * Gets the number of items that are visible in the drop
	 * down portion of the receiver's list.
	 *
	 * @return the number of items that are visible
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @since 3.0
	 */
	public int getVisibleItemCount () {
		checkWidget ();
		return visibleItemCount;
	}
	void handleFocus (int type) {
		if (isDisposed ()) return;
		switch (type) {
		case SWT.FocusIn: {
			if (hasFocus) return;
			if (getEditable ()) text.selectAll ();
			hasFocus = true;
			Shell shell = getShell ();
			shell.removeListener (SWT.Deactivate, listener);
			shell.addListener (SWT.Deactivate, listener);
			Display display = getDisplay ();
			display.removeFilter (SWT.FocusIn, filter);
			display.addFilter (SWT.FocusIn, filter);
			Event e = new Event ();
			notifyListeners (SWT.FocusIn, e);
			break;
		}
		case SWT.FocusOut: {
			if (!hasFocus) return;
			Control focusControl = getDisplay ().getFocusControl ();
			if (focusControl == arrow || focusControl == table || focusControl == text) return;
			hasFocus = false;
			Shell shell = getShell ();
			shell.removeListener(SWT.Deactivate, listener);
			Display display = getDisplay ();
			display.removeFilter (SWT.FocusIn, filter);
			Event e = new Event ();
			notifyListeners (SWT.FocusOut, e);
			break;
		}
		}
	}
	/**
	 * Searches the receiver's list starting at the first item
	 * (index 0) until an item is found that is equal to the
	 * argument, and returns the index of that item. If no item
	 * is found, returns -1.
	 *
	 * @param string the search item
	 * @return the index of the item
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public int indexOf (String string) {
		checkWidget ();
		if (string == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
		return Arrays.asList(getStringsFromTable()).indexOf (string);
	}


	void initAccessible() {
		AccessibleAdapter accessibleAdapter = new AccessibleAdapter () {
			@Override
			public void getName (AccessibleEvent e) {
				String name = null;
				Label label = getAssociatedLabel ();
				if (label != null) {
					name = stripMnemonic (label.getText());
				}
				e.result = name;
			}
			@Override
			public void getKeyboardShortcut(AccessibleEvent e) {
				String shortcut = null;
				Label label = getAssociatedLabel ();
				if (label != null) {
					String text = label.getText ();
					if (text != null) {
						char mnemonic = getMnemonic (text);
						if (mnemonic != '\0') {
							shortcut = "Alt+"+mnemonic; //$NON-NLS-1$
						}
					}
				}
				e.result = shortcut;
			}
			@Override
			public void getHelp (AccessibleEvent e) {
				e.result = getToolTipText ();
			}
		};
		getAccessible ().addAccessibleListener (accessibleAdapter);
		text.getAccessible ().addAccessibleListener (accessibleAdapter);
		table.getAccessible ().addAccessibleListener (accessibleAdapter);

		arrow.getAccessible ().addAccessibleListener (new AccessibleAdapter() {
			@Override
			public void getName (AccessibleEvent e) {
				e.result = isDropped () ? SWT.getMessage ("SWT_Close") : SWT.getMessage ("SWT_Open"); //$NON-NLS-1$ //$NON-NLS-2$
			}
			@Override
			public void getKeyboardShortcut (AccessibleEvent e) {
				e.result = "Alt+Down Arrow"; //$NON-NLS-1$
			}
			@Override
			public void getHelp (AccessibleEvent e) {
				e.result = getToolTipText ();
			}
		});

		getAccessible().addAccessibleTextListener (new AccessibleTextAdapter() {
			@Override
			public void getCaretOffset (AccessibleTextEvent e) {
				e.offset = text.getCaretPosition ();
			}
		});

		getAccessible().addAccessibleControlListener (new AccessibleControlAdapter() {
			@Override
			public void getChildAtPoint (AccessibleControlEvent e) {
				Point testPoint = toControl (e.x, e.y);
				if (getBounds ().contains (testPoint)) {
					e.childID = ACC.CHILDID_SELF;
				}
			}

			@Override
			public void getLocation (AccessibleControlEvent e) {
				Rectangle location = getBounds ();
				Point pt = toDisplay (location.x, location.y);
				e.x = pt.x;
				e.y = pt.y;
				e.width = location.width;
				e.height = location.height;
			}

			@Override
			public void getChildCount (AccessibleControlEvent e) {
				e.detail = 0;
			}

			@Override
			public void getRole (AccessibleControlEvent e) {
				e.detail = ACC.ROLE_COMBOBOX;
			}

			@Override
			public void getState (AccessibleControlEvent e) {
				e.detail = ACC.STATE_NORMAL;
			}

			@Override
			public void getValue (AccessibleControlEvent e) {
				e.result = getText ();
			}
		});

		text.getAccessible ().addAccessibleControlListener (new AccessibleControlAdapter () {
			@Override
			public void getRole (AccessibleControlEvent e) {
				e.detail = getEditable () ? ACC.ROLE_TEXT : ACC.ROLE_LABEL;
			}
		});

		arrow.getAccessible ().addAccessibleControlListener (new AccessibleControlAdapter() {
			@Override
			public void getDefaultAction (AccessibleControlEvent e) {
				e.result = isDropped () ? SWT.getMessage ("SWT_Close") : SWT.getMessage ("SWT_Open"); //$NON-NLS-1$ //$NON-NLS-2$
			}
		});
	}
	boolean isDropped () {
		return popup.getVisible ();
	}
	@Override
	public boolean isFocusControl () {
		checkWidget();
		if (text.isFocusControl () || arrow.isFocusControl () || table.isFocusControl () || popup.isFocusControl ()) {
			return true;
		}
		return super.isFocusControl ();
	}
	void internalLayout (boolean changed) {
		if (isDropped ()) dropDown (false);
		Rectangle rect = getClientArea ();
		int width = rect.width;
		int height = rect.height;
		Point arrowSize = arrow.computeSize (SWT.DEFAULT, height, changed);
		image.setBounds (0, 0, 20, height);
		text.setBounds (20, 0, width - 20 - arrowSize.x, height);
		arrow.setBounds (width - arrowSize.x, 0, arrowSize.x, arrowSize.y);
	}
	void listEvent (Event event) {
		switch (event.type) {
		case SWT.Dispose:
			if (getShell () != popup.getParent ()) {
				//	                TableItem[] items = table.getItems ();
				int selectionIndex = table.getSelectionIndex ();
				popup = null;
				table = null;
				createPopup (selectionIndex);
			}
			break;
		case SWT.FocusIn: {
			handleFocus (SWT.FocusIn);
			break;
		}
		case SWT.MouseUp: {
			if (event.button != 1) return;
			dropDown (false);
			break;
		}
		case SWT.Selection: {
			int index = table.getSelectionIndex ();
			if (index == -1) return;
			image.setImage(table.getItem (index).getImage());
			text.setText (table.getItem (index).getText());
			if (getEditable())
				text.selectAll ();
			table.setSelection (index);
			Event e = new Event ();
			e.time = event.time;
			e.stateMask = event.stateMask;
			e.doit = event.doit;
			notifyListeners (SWT.Selection, e);
			event.doit = e.doit;
			break;
		}
		case SWT.Traverse: {
			switch (event.detail) {
			case SWT.TRAVERSE_RETURN:
			case SWT.TRAVERSE_ESCAPE:
			case SWT.TRAVERSE_ARROW_PREVIOUS:
			case SWT.TRAVERSE_ARROW_NEXT:
				event.doit = false;
				break;
			}
			Event e = new Event ();
			e.time = event.time;
			e.detail = event.detail;
			e.doit = event.doit;
			e.character = event.character;
			e.keyCode = event.keyCode;
			notifyListeners (SWT.Traverse, e);
			event.doit = e.doit;
			event.detail = e.detail;
			break;
		}
		case SWT.KeyUp: {
			Event e = new Event ();
			e.time = event.time;
			e.character = event.character;
			e.keyCode = event.keyCode;
			e.stateMask = event.stateMask;
			notifyListeners (SWT.KeyUp, e);
			break;
		}
		case SWT.KeyDown: {
			if (event.character == SWT.ESC) {
				// Escape key cancels popup list
				dropDown (false);
			}
			if ((event.stateMask & SWT.ALT) != 0 && (event.keyCode == SWT.ARROW_UP || event.keyCode == SWT.ARROW_DOWN)) {
				dropDown (false);
			}
			if (event.character == SWT.CR) {
				// Enter causes default selection
				dropDown (false);
				Event e = new Event ();
				e.time = event.time;
				e.stateMask = event.stateMask;
				notifyListeners (SWT.DefaultSelection, e);
			}
			// At this point the widget may have been disposed.
			// If so, do not continue.
			if (isDisposed ()) break;
			Event e = new Event();
			e.time = event.time;
			e.character = event.character;
			e.keyCode = event.keyCode;
			e.stateMask = event.stateMask;
			notifyListeners(SWT.KeyDown, e);
			break;

		}
		}
	}

	void popupEvent(Event event) {
		switch (event.type) {
		case SWT.Paint:
			// draw black rectangle around list
			Rectangle listRect = table.getBounds();
			Color black = getDisplay().getSystemColor(SWT.COLOR_BLACK);
			event.gc.setForeground(black);
			event.gc.drawRectangle(0, 0, listRect.width + 1, listRect.height + 1);
			break;
		case SWT.Close:
			event.doit = false;
			dropDown (false);
			break;
		case SWT.Deactivate:
			dropDown (false);
			break;
		}
	}
	@Override
	public void redraw () {
		super.redraw();
		image.redraw();
		text.redraw();
		arrow.redraw();
		if (popup.isVisible()) table.redraw();
	}
	@Override
	public void redraw (int x, int y, int width, int height, boolean all) {
		super.redraw(x, y, width, height, true);
	}

	/**
	 * Removes the item from the receiver's list at the given
	 * zero-relative index.
	 *
	 * @param index the index for the item
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void remove (int index) {
		checkWidget();
		table.remove (index);
	}
	/**
	 * Removes the items from the receiver's list which are
	 * between the given zero-relative start and end
	 * indices (inclusive).
	 *
	 * @param start the start of the range
	 * @param end the end of the range
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_INVALID_RANGE - if either the start or end are not between 0 and the number of elements in the list minus 1 (inclusive)</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void remove (int start, int end) {
		checkWidget();
		table.remove (start, end);
	}
	/**
	 * Searches the receiver's list starting at the first item
	 * until an item is found that is equal to the argument,
	 * and removes that item from the list.
	 *
	 * @param string the item to remove
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
	 *    <li>ERROR_INVALID_ARGUMENT - if the string is not found in the list</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void remove (String string) {
		checkWidget();
		if (string == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
		int index = -1;
		for (int i = 0, n = table.getItemCount(); i < n; i++) {
			if (table.getItem(i).getText().equals(string)) {
				index = i;
				break;
			}
		}
		remove(index);
	}
	/**
	 * Removes all of the items from the receiver's list and clear the
	 * contents of receiver's text field.
	 * <p>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void removeAll () {
		checkWidget();
		image.setImage(null);
		text.setText (""); //$NON-NLS-1$
		table.removeAll ();
	}
	/**
	 * Removes the listener from the collection of listeners who will
	 * be notified when the receiver's text is modified.
	 *
	 * @param listener the listener which should no longer be notified
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @see ModifyListener
	 * @see #addModifyListener
	 */
	public void removeModifyListener (ModifyListener listener) {
		checkWidget();
		if (listener == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
		removeListener(SWT.Modify, listener);
	}
	/**
	 * Removes the listener from the collection of listeners who will
	 * be notified when the receiver's selection changes.
	 *
	 * @param listener the listener which should no longer be notified
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @see SelectionListener
	 * @see #addSelectionListener
	 */
	public void removeSelectionListener (SelectionListener listener) {
		checkWidget();
		if (listener == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
		removeListener(SWT.Selection, listener);
		removeListener(SWT.DefaultSelection,listener);
	}
	/**
	 * Selects the item at the given zero-relative index in the receiver's
	 * list.  If the item at the index was already selected, it remains
	 * selected. Indices that are out of range are ignored.
	 *
	 * @param index the index of the item to select
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void select (int index) {
		checkWidget();
		if (index == -1) {
			table.deselectAll ();
			image.setImage(null);
			text.setText (""); //$NON-NLS-1$
			return;
		}
		if (0 <= index && index < table.getItemCount()) {
			if (index != getSelectionIndex()) {
				image.setImage(table.getItem (index).getImage());
				text.setText (table.getItem (index).getText());
				if (getEditable())
					text.selectAll ();
				table.select (index);
				table.showSelection ();
			}
		}
	}
	@Override
	public void setBackground (Color color) {
		super.setBackground(color);
		background = color;
		if (image != null) image.setBackground(color);
		if (text != null) text.setBackground(color);
		if (table != null) table.setBackground(color);
		if (arrow != null) arrow.setBackground(color);
	}
	/**
	 * Sets the editable state.
	 *
	 * @param editable the new editable state
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @since 3.0
	 */
	public void setEditable (boolean editable) {
		checkWidget ();
		text.setEditable(editable);
	}
	@Override
	public void setEnabled (boolean enabled) {
		super.setEnabled(enabled);
		if (popup != null) popup.setVisible (false);
		if (image != null) image.setEnabled(enabled);
		if (text != null) text.setEnabled(enabled);
		if (arrow != null) arrow.setEnabled(enabled);
	}
	@Override
	public boolean setFocus () {
		checkWidget();
		return text.setFocus ();
	}
	@Override
	public void setFont (Font font) {
		super.setFont (font);
		this.font = font;
		text.setFont (font);
		table.setFont (font);
		internalLayout (true);
	}
	@Override
	public void setForeground (Color color) {
		super.setForeground(color);
		foreground = color;
		if (image != null) image.setForeground(color);
		if (text != null) text.setForeground(color);
		if (table != null) table.setForeground(color);
		if (arrow != null) arrow.setForeground(color);
	}
	/**
	 * Sets the text of the item in the receiver's list at the given
	 * zero-relative index to the string argument. This is equivalent
	 * to <code>remove</code>'ing the old item at the index, and then
	 * <code>add</code>'ing the new item at that index.
	 *
	 * @param index the index for the item
	 * @param string the new text for the item
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li>
	 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void setItem (int index, String string, Image image) {
		checkWidget();
		remove(index);
		add(string,image,index);
	}
	/**
	 * Sets the receiver's list to be the given array of items.
	 *
	 * @param items the array of items
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the items array is null</li>
	 *    <li>ERROR_INVALID_ARGUMENT - if an item in the items array is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void setItems (String [] items) {
		checkWidget ();
		this.table.removeAll();
		for (int i = 0, n = items.length; i < n; i++) {
			add(items[i],null);
		}
		if (!getEditable ()) {
			image.setImage(null);
			text.setText (""); //$NON-NLS-1$
		}
	}

	/**
	 * Sets the layout which is associated with the receiver to be
	 * the argument which may be null.
	 * <p>
	 * Note : No Layout can be set on this Control because it already
	 * manages the size and position of its children.
	 * </p>
	 *
	 * @param layout the receiver's new layout or null
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	@Override
	public void setLayout (Layout layout) {
		checkWidget ();
		return;
	}
	/**
	 * Sets the selection in the receiver's text field to the
	 * range specified by the argument whose x coordinate is the
	 * start of the selection and whose y coordinate is the end
	 * of the selection.
	 *
	 * @param selection a point representing the new selection start and end
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the point is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void setSelection (Point selection) {
		checkWidget();
		if (selection == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
		text.setSelection (selection.x, selection.y);
	}

	/**
	 * Sets the contents of the receiver's text field to the
	 * given string.
	 * <p>
	 * Note: The text field in a <code>Combo</code> is typically
	 * only capable of displaying a single line of text. Thus,
	 * setting the text to a string containing line breaks or
	 * other special characters will probably cause it to
	 * display incorrectly.
	 * </p>
	 *
	 * @param string the new text
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void setText (String string, Image icon) {
		checkWidget();
		if (string == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
		int index = -1;
		for (int i = 0, n = table.getItemCount(); i < n; i++) {
			if (table.getItem(i).getText().equals(string)) {
				index = i;
				break;
			}
		}
		if (index == -1) {
			table.deselectAll ();
			image.setImage(icon);
			text.setText (string);
			return;
		}
		image.setImage(icon);
		text.setText (string);
		if (getEditable())
			text.selectAll ();
		table.setSelection (index);
		table.showSelection ();
	}

	/**
	 * Sets the maximum number of characters that the receiver's
	 * text field is capable of holding to be the argument.
	 *
	 * @param limit new text limit
	 *
	 * @exception IllegalArgumentException <ul>
	 *    <li>ERROR_CANNOT_BE_ZERO - if the limit is zero</li>
	 * </ul>
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void setTextLimit (int limit) {
		checkWidget();
		text.setTextLimit (limit);
	}

	@Override
	public void setToolTipText (String string) {
		checkWidget();
		super.setToolTipText(string);
		arrow.setToolTipText (string);
		image.setToolTipText (string);
		text.setToolTipText (string);
	}

	@Override
	public void setVisible (boolean visible) {
		super.setVisible(visible);
		if (!visible) popup.setVisible(false);
	}
	/**
	 * Sets the number of items that are visible in the drop
	 * down portion of the receiver's list.
	 *
	 * @param count the new number of items to be visible
	 *
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 *
	 * @since 3.0
	 */
	public void setVisibleItemCount (int count) {
		checkWidget ();
		if (count < 0) return;
		visibleItemCount = count;
	}
	String stripMnemonic (String string) {
		int index = 0;
		int length = string.length ();
		do {
			while ((index < length) && (string.charAt (index) != '&')) index++;
			if (++index >= length) return string;
			if (string.charAt (index) != '&') {
				return string.substring(0, index-1) + string.substring(index, length);
			}
			index++;
		} while (index < length);
		return string;
	}
	void textEvent (Event event) {
		switch (event.type) {
		case SWT.FocusIn: {
			handleFocus (SWT.FocusIn);
			break;
		}
		case SWT.KeyDown: {
			if (event.character == SWT.CR) {
				dropDown (false);
				Event e = new Event ();
				e.time = event.time;
				e.stateMask = event.stateMask;
				notifyListeners (SWT.DefaultSelection, e);
			}
			//At this point the widget may have been disposed.
			// If so, do not continue.
			if (isDisposed ()) break;

			if (event.keyCode == SWT.ARROW_UP || event.keyCode == SWT.ARROW_DOWN) {
				event.doit = false;
				if ((event.stateMask & SWT.ALT) != 0) {
					boolean dropped = isDropped ();
					if (getEditable())
						text.selectAll ();
					if (!dropped) setFocus ();
					dropDown (!dropped);
					break;
				}

				int oldIndex = getSelectionIndex ();
				if (event.keyCode == SWT.ARROW_UP) {
					select (Math.max (oldIndex - 1, 0));
				} else {
					select (Math.min (oldIndex + 1, getItemCount () - 1));
				}
				if (oldIndex != getSelectionIndex ()) {
					Event e = new Event();
					e.time = event.time;
					e.stateMask = event.stateMask;
					notifyListeners (SWT.Selection, e);
				}
				//At this point the widget may have been disposed.
				// If so, do not continue.
				if (isDisposed ()) break;
			}

			Event e = new Event ();
			e.time = event.time;
			e.character = event.character;
			e.keyCode = event.keyCode;
			e.stateMask = event.stateMask;
			notifyListeners (SWT.KeyDown, e);
			break;
		}
		case SWT.KeyUp: {
			Event e = new Event ();
			e.time = event.time;
			e.character = event.character;
			e.keyCode = event.keyCode;
			e.stateMask = event.stateMask;
			notifyListeners (SWT.KeyUp, e);
			break;
		}
		case SWT.Modify: {
			table.deselectAll ();
			Event e = new Event ();
			e.time = event.time;
			notifyListeners (SWT.Modify, e);
			break;
		}
		case SWT.MouseDown: {
			if (event.button != 1) return;
			if (getEditable ()) return;
			boolean dropped = isDropped ();
			text.selectAll ();
			if (!dropped) setFocus ();
			dropDown (!dropped);
			break;
		}
		case SWT.MouseUp: {
			if (event.button != 1) return;
			if (getEditable ()) return;
			text.selectAll ();
			break;
		}
		case SWT.Traverse: {
			switch (event.detail) {
			case SWT.TRAVERSE_RETURN:
			case SWT.TRAVERSE_ARROW_PREVIOUS:
			case SWT.TRAVERSE_ARROW_NEXT:
				// The enter causes default selection and
				// the arrow keys are used to manipulate the list contents so
				// do not use them for traversal.
				event.doit = false;
				break;
			}

			Event e = new Event ();
			e.time = event.time;
			e.detail = event.detail;
			e.doit = event.doit;
			e.character = event.character;
			e.keyCode = event.keyCode;
			notifyListeners (SWT.Traverse, e);
			event.doit = e.doit;
			event.detail = e.detail;
			break;
		}
		}
	}
}