| /******************************************************************************* |
| * Copyright (c) 2000, 2015 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui; |
| |
| import java.util.EventListener; |
| import org.eclipse.jface.viewers.ISelection; |
| |
| /** |
| * Interface for listening to selection changes. |
| * <p> |
| * This interface may be implemented by clients. |
| * </p> |
| * |
| * @see ISelectionService#addSelectionListener(ISelectionListener) |
| * @see ISelectionService#addSelectionListener(String, ISelectionListener) |
| * @see org.eclipse.ui.INullSelectionListener |
| */ |
| public interface ISelectionListener extends EventListener { |
| /** |
| * Notifies this listener that the selection has changed. |
| * <p> |
| * <b>Note:</b> it is important that this method returns as quickly as possible |
| * to avoid UI freezes. For example, do not update the UI if the UI is not |
| * visible. See the {@link SelectionListenerFactory} for listeners that are |
| * build for this purpose. |
| * </p> |
| * <p> |
| * This method is called when the selection changes to a <code>non-null</code> |
| * value, but not when the selection changes to <code>null</code>. If there is a |
| * requirement to be notified in the latter scenario, implement |
| * <code>INullSelectionListener</code>. The event will be posted through this |
| * method. |
| * </p> |
| * |
| * @param part the workbench part containing the selection |
| * @param selection the current selection. This may be <code>null</code> if |
| * <code>INullSelectionListener</code> is implemented. |
| * @see SelectionListenerFactory#createVisibleListener(IWorkbenchPart, |
| * ISelectionListener) |
| * @see SelectionListenerFactory#createVisibleSelfMutedListener(IWorkbenchPart, |
| * ISelectionListener) |
| */ |
| void selectionChanged(IWorkbenchPart part, ISelection selection); |
| } |
