Attachment 88500 Details for Bug 217384 – an IBM internal copy of the CCombo class

an IBM internal copy of the CCombo class

FlatCCombo.java (text/plain), 53.20 KB, created by Craig Salter

on 2008-01-31 23:43:08 EST

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Filename:

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Creator: Craig Salter

Created: 2008-01-31 23:43:08 EST

Size: 53.20 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2000, 2006 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
> *******************************************************************************/
>package com.ibm.ccl.mapping.internal.ui.editor.viewmodes;
>
>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.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.List;
>import org.eclipse.swt.widgets.Listener;
>import org.eclipse.swt.widgets.Menu;
>import org.eclipse.swt.widgets.Shell;
>import org.eclipse.swt.widgets.Text;
>import org.eclipse.swt.widgets.TypedListener;
>import org.eclipse.swt.widgets.Widget;
>
>/**
> * This code is a copy of the CCombo class that has been modified to allow 
> * for a customizable arrow image on the drop down box. 
> * See eclipse bug 217384 for more details. 
> */
>public final class FlatCCombo extends Composite {
>
>	Text text;
>	List list;
>	int visibleItemCount = 5;
>	Shell popup;
>	Label 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.
>	 * 
>	 * 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 bitwise OR'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.
>	 * 
>	 * 
>	 * @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 FlatCCombo(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;
>		text = new Text(this, textStyle);
>		int arrowStyle = SWT.ARROW | SWT.DOWN;
>		if ((style & SWT.FLAT) != 0)
>			arrowStyle |= SWT.FLAT;
>		arrow = new Label(this, SWT.FLAT);
>
>		listener = new Listener() {
>			public void handleEvent(Event event) {
>				if (popup == event.widget) {
>					popupEvent(event);
>					return;
>				}
>				if (text == event.widget) {
>					textEvent(event);
>					return;
>				}
>				if (list == event.widget) {
>					listEvent(event);
>					return;
>				}
>				if (arrow == event.widget) {
>					arrowEvent(event);
>					return;
>				}
>				if (FlatCCombo.this == event.widget) {
>					comboEvent(event);
>					return;
>				}
>				if (getShell() == event.widget) {
>					handleFocus(SWT.FocusOut);
>				}
>			}
>		};
>		filter = new Listener() {
>			public void handleEvent(Event event) {
>				Shell shell = ((Control) event.widget).getShell();
>				if (shell == FlatCCombo.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.MenuDetect, 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.MouseDown, SWT.Selection, SWT.FocusIn};
>		for (int i = 0; i < arrowEvents.length; i++)
>			arrow.addListener(arrowEvents[i], listener);
>
>		createPopup(null, -1);
>		initAccessible();
>	}
>
>	public void setArrowImage(Image image) {
>		arrow.setImage(image);
>	}
>	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) {
>		checkWidget();
>		if (string == null)
>			SWT.error(SWT.ERROR_NULL_ARGUMENT);
>		list.add(string);
>	}
>	/**
>	 * Adds the argument to the receiver's list at the given zero-relative
>	 * index.
>	 * 
>	 * 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>.
>	 * 
>	 * 
>	 * @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, int index) {
>		checkWidget();
>		if (string == null)
>			SWT.error(SWT.ERROR_NULL_ARGUMENT);
>		list.add(string, index);
>	}
>	/**
>	 * 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.
>	 * 
>	 * <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.
>	 * 
>	 * 
>	 * @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;
>			}
>			case SWT.MouseDown : {
>				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.
>	 * 
>	 * Note: To clear the selected items in the receiver's list, use
>	 * <code>deselectAll()</code>.
>	 * 
>	 * 
>	 * @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();
>		list.deselectAll();
>	}
>	void comboEvent(Event event) {
>		switch (event.type) {
>			case SWT.Dispose :
>				if (popup != null && !popup.isDisposed()) {
>					list.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;
>				list = null;
>				arrow = null;
>				break;
>			case SWT.Move :
>				dropDown(false);
>				break;
>			case SWT.Resize :
>				internalLayout(false);
>				break;
>		}
>	}
>
>	public Point computeSize(int wHint, int hHint, boolean changed) {
>		checkWidget();
>		int width = 0, height = 0;
>		String[] items = list.getItems();
>		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 arrowSize = new Point(16, 16);
>		Point listSize = list.computeSize(SWT.DEFAULT, SWT.DEFAULT, changed);
>		int borderWidth = getBorderWidth();
>
>		height = Math.max(textSize.y, arrowSize.y);
>		width = Math.max(
>				textWidth + 2 * spacer + arrowSize.x + 2 * borderWidth,
>				listSize.x);
>		if (wHint != SWT.DEFAULT)
>			width = wHint;
>		if (hHint != SWT.DEFAULT)
>			height = hHint;
>		return new Point(width + 2 * borderWidth, height + 2 * borderWidth);
>	}
>	void createPopup(String[] items, 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;
>		list = new List(popup, listStyle);
>		if (font != null)
>			list.setFont(font);
>		if (foreground != null)
>			list.setForeground(foreground);
>		if (background != null)
>			list.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++)
>			list.addListener(listEvents[i], listener);
>
>		if (items != null)
>			list.setItems(items);
>		if (selectionIndex != -1)
>			list.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();
>		list.deselect(index);
>	}
>	/**
>	 * Deselects all selected items in the receiver's list.
>	 * 
>	 * Note: To clear the selection in the receiver's text field, use
>	 * <code>clearSelection()</code>.
>	 * 
>	 * 
>	 * @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();
>		list.deselectAll();
>	}
>	void dropDown(boolean drop) {
>		if (drop == isDropped())
>			return;
>		if (!drop) {
>			popup.setVisible(false);
>			if (!isDisposed() && arrow.isFocusControl()) {
>				text.setFocus();
>			}
>			return;
>		}
>
>		if (getShell() != popup.getParent()) {
>			String[] items = list.getItems();
>			int selectionIndex = list.getSelectionIndex();
>			list.removeListener(SWT.Dispose, listener);
>			popup.dispose();
>			popup = null;
>			list = null;
>			createPopup(items, selectionIndex);
>		}
>
>		Point size = getSize();
>		int itemCount = list.getItemCount();
>		itemCount = (itemCount == 0) ? visibleItemCount : Math.min(
>				visibleItemCount, itemCount);
>		int itemHeight = list.getItemHeight() * itemCount;
>		Point listSize = list.computeSize(SWT.DEFAULT, itemHeight, false);
>		list.setBounds(1, 1, Math.max(size.x - 2, listSize.x), listSize.y);
>
>		int index = list.getSelectionIndex();
>		if (index != -1)
>			list.setTopIndex(index);
>		Display display = getDisplay();
>		Rectangle listRect = list.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;
>		if (x + width > displayRect.x + displayRect.width)
>			x = displayRect.x + displayRect.width - listRect.width;
>		popup.setBounds(x, y, width, height);
>		popup.setVisible(true);
>		list.setFocus();
>	}
>	/*
>	 * Return the lowercase of the first non-'&' character following an '&'
>	 * character in the given string. If there are no '&' characters in the
>	 * given string, return '\0'.
>	 */
>	char _findMnemonic(String string) {
>		if (string == null)
>			return '\0';
>		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 Character.toLowerCase(string.charAt(index));
>			index++;
>		} while (index < length);
>		return '\0';
>	}
>	/*
>	 * 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] == this) {
>				if (i > 0 && siblings[i - 1] instanceof Label) {
>					return (Label) siblings[i - 1];
>				}
>			}
>		}
>		return null;
>	}
>	public Control[] getChildren() {
>		return super.getChildren();
>	}
>	/**
>	 * Gets the editable state.
>	 * 
>	 * @return whether or not the receiver 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 String getItem(int index) {
>		checkWidget();
>		return list.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 list.getItemCount();
>	}
>	/**
>	 * Returns the height of the area which would be used to display
>	 * one 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 list.getItemHeight();
>	}
>	/**
>	 * Returns an array of <code>String</code>s which are the items in the
>	 * receiver's list.
>	 * 
>	 * 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.
>	 * 
>	 * 
>	 * @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 String[] getItems() {
>		checkWidget();
>		return list.getItems();
>	}
>	public Menu getMenu() {
>		return text.getMenu();
>	}
>	/**
>	 * 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 list.getSelectionIndex();
>	}
>	public int getStyle() {
>		int style = super.getStyle();
>		style &= ~SWT.READ_ONLY;
>		if (!text.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 == list
>						|| 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 list.indexOf(string);
>	}
>	/**
>	 * Searches the receiver's list starting at the given, zero-relative index
>	 * until an item is found that is equal to the argument, and returns the
>	 * index of that item. If no item is found or the starting index is out of
>	 * range, returns -1.
>	 * 
>	 * @param string
>	 * the search item
>	 * @param start
>	 * the zero-relative index at which to begin the search
>	 * @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, int start) {
>		checkWidget();
>		if (string == null)
>			SWT.error(SWT.ERROR_NULL_ARGUMENT);
>		return list.indexOf(string, start);
>	}
>
>	void initAccessible() {
>		AccessibleAdapter accessibleAdapter = new AccessibleAdapter() {
>			public void getName(AccessibleEvent e) {
>				String name = null;
>				Label label = getAssociatedLabel();
>				if (label != null) {
>					name = stripMnemonic(label.getText());
>				}
>				e.result = name;
>			}
>			public void getKeyboardShortcut(AccessibleEvent e) {
>				String shortcut = null;
>				Label label = getAssociatedLabel();
>				if (label != null) {
>					String text = label.getText();
>					if (text != null) {
>						char mnemonic = _findMnemonic(text);
>						if (mnemonic != '\0') {
>							shortcut = "Alt+" + mnemonic; //$NON-NLS-1$
>						}
>					}
>				}
>				e.result = shortcut;
>			}
>			public void getHelp(AccessibleEvent e) {
>				e.result = getToolTipText();
>			}
>		};
>		getAccessible().addAccessibleListener(accessibleAdapter);
>		text.getAccessible().addAccessibleListener(accessibleAdapter);
>		list.getAccessible().addAccessibleListener(accessibleAdapter);
>
>		arrow.getAccessible().addAccessibleListener(new AccessibleAdapter() {
>			public void getName(AccessibleEvent e) {
>				e.result = isDropped()
>						? SWT.getMessage("SWT_Close") : SWT.getMessage("SWT_Open"); //$NON-NLS-1$ //$NON-NLS-2$
>			}
>			public void getKeyboardShortcut(AccessibleEvent e) {
>				e.result = "Alt+Down Arrow"; //$NON-NLS-1$
>			}
>			public void getHelp(AccessibleEvent e) {
>				e.result = getToolTipText();
>			}
>		});
>
>		getAccessible().addAccessibleTextListener(new AccessibleTextAdapter() {
>			public void getCaretOffset(AccessibleTextEvent e) {
>				e.offset = text.getCaretPosition();
>			}
>			public void getSelectionRange(AccessibleTextEvent e) {
>				Point sel = text.getSelection();
>				e.offset = sel.x;
>				e.length = sel.y - sel.x;
>			}
>		});
>
>		getAccessible().addAccessibleControlListener(
>				new AccessibleControlAdapter() {
>					public void getChildAtPoint(AccessibleControlEvent e) {
>						Point testPoint = toControl(e.x, e.y);
>						if (getBounds().contains(testPoint)) {
>							e.childID = ACC.CHILDID_SELF;
>						}
>					}
>
>					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;
>					}
>
>					public void getChildCount(AccessibleControlEvent e) {
>						e.detail = 0;
>					}
>
>					public void getRole(AccessibleControlEvent e) {
>						e.detail = ACC.ROLE_COMBOBOX;
>					}
>
>					public void getState(AccessibleControlEvent e) {
>						e.detail = ACC.STATE_NORMAL;
>					}
>
>					public void getValue(AccessibleControlEvent e) {
>						e.result = getText();
>					}
>				});
>
>		text.getAccessible().addAccessibleControlListener(
>				new AccessibleControlAdapter() {
>					public void getRole(AccessibleControlEvent e) {
>						e.detail = text.getEditable()
>								? ACC.ROLE_TEXT
>								: ACC.ROLE_LABEL;
>					}
>				});
>
>		arrow.getAccessible().addAccessibleControlListener(
>				new AccessibleControlAdapter() {
>					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();
>	}
>	public boolean isFocusControl() {
>		checkWidget();
>		if (text.isFocusControl() || arrow.isFocusControl()
>				|| list.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);
>		// text.setBounds (0, 0, width - arrowSize.x, height);
>		text.setBounds(0, 0, width - 16, height);
>		// arrow.setBounds (width - arrowSize.x, 0, arrowSize.x, arrowSize.y);
>		arrow.setBounds(width - 16, 0, 16, 16);
>	}
>	void listEvent(Event event) {
>		switch (event.type) {
>			case SWT.Dispose :
>				if (getShell() != popup.getParent()) {
>					String[] items = list.getItems();
>					int selectionIndex = list.getSelectionIndex();
>					popup = null;
>					list = null;
>					createPopup(items, 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 = list.getSelectionIndex();
>				if (index == -1)
>					return;
>				text.setText(list.getItem(index));
>				text.selectAll();
>				list.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 = list.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;
>		}
>	}
>	public void redraw() {
>		super.redraw();
>		text.redraw();
>		arrow.redraw();
>		if (popup.isVisible())
>			list.redraw();
>	}
>	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();
>		list.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();
>		list.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);
>		list.remove(string);
>	}
>	/**
>	 * Removes all of the items from the receiver's list and clear the contents
>	 * of receiver's text field.
>	 * 
>	 * 
>	 * @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();
>		text.setText(""); //$NON-NLS-1$
>		list.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) {
>			list.deselectAll();
>			text.setText(""); //$NON-NLS-1$
>			return;
>		}
>		if (0 <= index && index < list.getItemCount()) {
>			if (index != getSelectionIndex()) {
>				text.setText(list.getItem(index));
>				text.selectAll();
>				list.select(index);
>				list.showSelection();
>			}
>		}
>	}
>	public void setBackground(Color color) {
>		super.setBackground(color);
>		background = color;
>		if (text != null)
>			text.setBackground(color);
>		if (list != null)
>			list.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);
>	}
>	public void setEnabled(boolean enabled) {
>		super.setEnabled(enabled);
>		if (popup != null)
>			popup.setVisible(false);
>		if (text != null)
>			text.setEnabled(enabled);
>		if (arrow != null)
>			arrow.setEnabled(enabled);
>	}
>	public boolean setFocus() {
>		checkWidget();
>		return text.setFocus();
>	}
>	public void setFont(Font font) {
>		super.setFont(font);
>		this.font = font;
>		text.setFont(font);
>		list.setFont(font);
>		internalLayout(true);
>	}
>	public void setForeground(Color color) {
>		super.setForeground(color);
>		foreground = color;
>		if (text != null)
>			text.setForeground(color);
>		if (list != null)
>			list.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) {
>		checkWidget();
>		list.setItem(index, string);
>	}
>	/**
>	 * 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();
>		list.setItems(items);
>		if (!text.getEditable())
>			text.setText(""); //$NON-NLS-1$
>	}
>	/**
>	 * Sets the layout which is associated with the receiver to be the argument
>	 * which may be null.
>	 * 
>	 * Note: No Layout can be set on this Control because it already manages the
>	 * size and position of its children.
>	 * 
>	 * 
>	 * @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>
>	 */
>	public void setLayout(Layout layout) {
>		checkWidget();
>		return;
>	}
>	public void setMenu(Menu menu) {
>		text.setMenu(menu);
>	}
>	/**
>	 * 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.
>	 * 
>	 * 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.
>	 * 
>	 * 
>	 * @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) {
>		checkWidget();
>		if (string == null)
>			SWT.error(SWT.ERROR_NULL_ARGUMENT);
>		int index = list.indexOf(string);
>		if (index == -1) {
>			list.deselectAll();
>			text.setText(string);
>			return;
>		}
>		text.setText(string);
>		text.selectAll();
>		list.setSelection(index);
>		list.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);
>	}
>
>	public void setToolTipText(String string) {
>		checkWidget();
>		super.setToolTipText(string);
>		arrow.setToolTipText(string);
>		text.setToolTipText(string);
>	}
>
>	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();
>						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;
>				}
>
>				// Further work : Need to add support for incremental search in
>				// pop up list as characters typed in text widget
>
>				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.MenuDetect : {
>				Event e = new Event();
>				e.time = event.time;
>				notifyListeners(SWT.MenuDetect, e);
>				break;
>			}
>			case SWT.Modify : {
>				list.deselectAll();
>				Event e = new Event();
>				e.time = event.time;
>				notifyListeners(SWT.Modify, e);
>				break;
>			}
>			case SWT.MouseDown : {
>				if (event.button != 1)
>					return;
>				if (text.getEditable())
>					return;
>				boolean dropped = isDropped();
>				text.selectAll();
>				if (!dropped)
>					setFocus();
>				dropDown(!dropped);
>				break;
>			}
>			case SWT.MouseUp : {
>				if (event.button != 1)
>					return;
>				if (text.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;
>			}
>		}
>	}
>}

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Attachments on bug 217384: 88500