| /******************************************************************************* |
| * Copyright (c) 2009, 2010 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 org.eclipse.swt.accessibility; |
| |
| import org.eclipse.swt.internal.SWTEventListener; |
| |
| /** |
| * Classes which implement this interface provide methods |
| * that handle AccessibleValue events. |
| * <p> |
| * After creating an instance of a class that implements |
| * this interface it can be added to an accessible using the |
| * <code>addAccessibleValueListener</code> method and removed using |
| * the <code>removeAccessibleValueListener</code> method. |
| * </p> |
| * |
| * @see AccessibleValueAdapter |
| * @see AccessibleValueEvent |
| * |
| * @since 3.6 |
| */ |
| public interface AccessibleValueListener extends SWTEventListener { |
| /** |
| * Returns the value of this object as a number. |
| * |
| * @param e an event object containing the following fields:<ul> |
| * <li>[out] value - the number that is the current value of this object</li> |
| * </ul> |
| */ |
| public void getCurrentValue(AccessibleValueEvent e); |
| |
| /** |
| * Sets the value of this object to the given number. |
| * |
| * The argument is clipped to the valid interval whose upper and lower |
| * bounds are returned by getMaximumValue and getMinimumValue, |
| * i.e. if it is lower than the minimum value the new value will be the minimum, |
| * and if it is greater than the maximum then the new value will be the maximum. |
| * |
| * @param e an event object containing the following fields:<ul> |
| * <li>[in/out] value - on input, the number that will be the new value of this object |
| * <br>- on output, set to null if the value cannot be set</li> |
| * </ul> |
| */ |
| public void setCurrentValue(AccessibleValueEvent e); |
| |
| /** |
| * Returns the maximum value that can be represented by this object. |
| * |
| * @param e an event object containing the following fields:<ul> |
| * <li>[out] value - the number that is the maximum value that this object can represent. |
| * If this object has no upper bound then null is returned.</li> |
| * </ul> |
| */ |
| public void getMaximumValue(AccessibleValueEvent e); |
| |
| /** |
| * Returns the minimum value that can be represented by this object. |
| * |
| * @param e an event object containing the following fields:<ul> |
| * <li>[out] value - the number that is the minimum value that this object can represent. |
| * If this object has no lower bound then null is returned.</li> |
| * </ul> |
| */ |
| public void getMinimumValue(AccessibleValueEvent e); |
| } |