* @exception SWTError(ERROR_CANNOT_GET_COUNT)*	when the operation fails*/public int getItemCount () {	checkWidget();	return list.getItemCount ();}/*** Gets the height of one item.* <p>* This operation will fail if the height of* one item could not be queried from the OS.** @return the height of one item in the widget** @exception SWTError(ERROR_THREAD_INVALID_ACCESS)*	when called from the wrong thread* @exception SWTError(ERROR_WIDGET_DISPOSED)*	when the widget has been disposed* @exception SWTError(ERROR_CANNOT_GET_ITEM_HEIGHT)*	when the operation fails*/public int getItemHeight () {	checkWidget();	return list.getItemHeight ();}/*** Gets the items.* <p>* This operation will fail if the items cannot* be queried from the OS.** @return the items in the widget** @exception SWTError(ERROR_THREAD_INVALID_ACCESS)*	when called from the wrong thread* @exception SWTError(ERROR_WIDGET_DISPOSED)*	when the widget has been disposed* @exception SWTError(ERROR_CANNOT_GET_ITEM)*	when the operation fails*/public String [] getItems () {	checkWidget();	return list.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';}/*** Gets the selection.* <p>* @return a point representing the selection start and end** @exception SWTError(ERROR_THREAD_INVALID_ACCESS)*	when called from the wrong thread* @exception SWTError(ERROR_WIDGET_DISPOSED)*	when the widget has been disposed*/public Point getSelection () {	checkWidget();	return text.getSelection ();}/*** Gets the index of the selected item.* <p>* Indexing is zero based.* If no item is selected -1 is returned.** @return the index of the selected item.** @exception SWTError(ERROR_THREAD_INVALID_ACCESS)*	when called from the wrong thread* @exception SWTError(ERROR_WIDGET_DISPOSED)*	when the widget has been disposed*/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;}/*** Gets the widget text.* <p>* If the widget has no text, an empty string is returned.** @return the widget text** @exception SWTError(ERROR_THREAD_INVALID_ACCESS)*	when called from the wrong thread* @exception SWTError(ERROR_WIDGET_DISPOSED)*	when the widget has been disposed*/public String getText () {	checkWidget();	return text.getText ();}/*** Gets the height of the combo's text field.* <p>* The operation will fail if the height cannot * be queried from the OS.* @return the height of the combo's text field.* * @exception SWTError(ERROR_THREAD_INVALID_ACCESS)*	when called from the wrong thread* @exception SWTError(ERROR_WIDGET_DISPOSED)*	when the widget has been disposed* @exception SWTError(ERROR_ERROR_CANNOT_GET_ITEM_HEIGHT)*	when the operation fails*/public int getTextHeight () {	checkWidget();	return text.getLineHeight();}/*** Gets the text limit.* <p>* @return the text limit* * @exception SWTError(ERROR_THREAD_INVALID_ACCESS)*	when called from the wrong thread* @exception SWTError(ERROR_WIDGET_DISPOSED)*	when the widget has been disposed*/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;		}	}}/*** Gets the index of an item.* <p>* The list is searched starting at 0 until an* item is found that is equal to the search item.* If no item is found, -1 is returned.  Indexing* is zero based.** @param string the search item* @return the index of the item** @exception SWTError(ERROR_THREAD_INVALID_ACCESS)*	when called from the wrong thread* @exception SWTError(ERROR_WIDGET_DISPOSED)*	when the widget has been disposed* @exception SWTError(ERROR_NULL_ARGUMENT)*	when string is null*/public int indexOf (String string) {	checkWidget();	if (string == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);	return list.indexOf (string);}/*** Gets the index of an item.* <p>* The widget is searched starting at start including* the end position until an item is found that* is equal to the search itenm.  If no item is* found, -1 is returned.  Indexing is zero based.** @param string the search item* @param start the starting position* @return the index of the item** @exception SWTError(ERROR_THREAD_INVALID_ACCESS)*	when called from the wrong thread* @exception SWTError(ERROR_WIDGET_DISPOSED)*	when the widget has been disposed* @exception SWTError(ERROR_NULL_ARGUMENT)*	when string is null*/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 = getMnemonic(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);		getAccessible().addAccessibleTextListener(new AccessibleTextAdapter() {		public void getCaretOffset(AccessibleTextEvent e) {			e.offset = text.getCaretPosition();		}	});		getAccessible().addAccessibleControlListener(new AccessibleControlAdapter() {		public void getChildAtPoint(AccessibleControlEvent e) {			Point testPoint = toControl(new Point(e.x, e.y));			if (getBounds().contains(testPoint)) {				e.childID = ACC.CHILDID_SELF;			}		}				public void getLocation(AccessibleControlEvent e) {			Rectangle location = getBounds();			Point pt = toDisplay(new Point(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();		}	});}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 () {	if (isDropped ()) dropDown (false);		Rectangle rect = getClientArea();	int width = rect.width;	int height = rect.height;	Point arrowSize = arrow.computeSize(SWT.DEFAULT, height);	text.setBounds (0, 0, width - 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()) {				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 an item at an index.* <p>* Indexing is zero based.