| /******************************************************************************* |
| * Copyright (c) 2005, 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 org.eclipse.debug.internal.ui.viewers; |
| |
| import org.eclipse.core.runtime.ListenerList; |
| import org.eclipse.core.runtime.SafeRunner; |
| import org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext; |
| import org.eclipse.jface.util.IPropertyChangeListener; |
| import org.eclipse.jface.util.PropertyChangeEvent; |
| import org.eclipse.jface.util.SafeRunnable; |
| import org.eclipse.ui.IWorkbenchPart; |
| |
| /** |
| * Presentation context. |
| * <p> |
| * Clients may instantiate and subclass this class. |
| * </p> |
| * @since 3.2 |
| */ |
| public class PresentationContext implements IPresentationContext { |
| |
| private IWorkbenchPart fPart; |
| private String[] fColumns; |
| private ListenerList fListeners = new ListenerList(); |
| |
| /** |
| * Constructs a presentation context for the given part. |
| * |
| * @param part workbench part |
| */ |
| public PresentationContext(IWorkbenchPart part) { |
| fPart = part; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.viewers.IPresentationContext#getPart() |
| */ |
| public IWorkbenchPart getPart() { |
| return fPart; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext#getColumns() |
| */ |
| public String[] getColumns() { |
| return fColumns; |
| } |
| |
| /** |
| * Fires a property change event to all registered listeners |
| * |
| * @param property property name |
| * @param oldValue old value or <code>null</code> |
| * @param newValue new value or <code>null</code> |
| */ |
| protected void firePropertyChange(String property, Object oldValue, Object newValue) { |
| if (!fListeners.isEmpty()) { |
| final PropertyChangeEvent event = new PropertyChangeEvent(this, property, oldValue, newValue); |
| Object[] listeners = fListeners.getListeners(); |
| for (int i = 0; i < listeners.length; i++) { |
| final IPropertyChangeListener listener = (IPropertyChangeListener) listeners[i]; |
| SafeRunner.run(new SafeRunnable() { |
| public void run() throws Exception { |
| listener.propertyChange(event); |
| } |
| }); |
| } |
| } |
| } |
| |
| /** |
| * Sets the visible column ids. |
| * |
| * @param ids column identifiers |
| */ |
| protected void setColumns(String[] ids) { |
| String[] oldValue = fColumns; |
| fColumns = ids; |
| firePropertyChange(IPresentationContext.PROPERTY_COLUMNS, oldValue, ids); |
| } |
| |
| /** |
| * Disposes this presentation context. |
| */ |
| protected void dispose() { |
| fListeners.clear(); |
| fPart = null; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext#addPropertyChangeListener(org.eclipse.jface.util.IPropertyChangeListener) |
| */ |
| public void addPropertyChangeListener(IPropertyChangeListener listener) { |
| fListeners.add(listener); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext#removePropertyChangeListener(org.eclipse.jface.util.IPropertyChangeListener) |
| */ |
| public void removePropertyChangeListener(IPropertyChangeListener listener) { |
| fListeners.remove(listener); |
| } |
| |
| } |