/*******************************************************************************
* Copyright (c) 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.jface.internal.provisional.action;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.jface.action.ToolBarManager;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.ToolBar;
/**
* Extends <code>ToolBarManager</code> to implement <code>IToolBarManager2</code>.
*
* <p>
* <strong>EXPERIMENTAL</strong>. This class or interface has been added as
* part of a work in progress. There is a guarantee neither that this API will
* work nor that it will remain the same. Please do not use this API without
* consulting with the Platform/UI team.
* </p>
*
* @since 3.2
*/
public class ToolBarManager2 extends ToolBarManager implements IToolBarManager2 {
/**
* A collection of objects listening to changes to this manager. This
* collection is <code>null</code> if there are no listeners.
*/
private transient ListenerList listenerList = null;
/**
* Creates a new tool bar manager with the default SWT button style. Use the
* <code>createControl</code> method to create the tool bar control.
*/
public ToolBarManager2() {
super();
}
/**
* Creates a tool bar manager with the given SWT button style. Use the
* <code>createControl</code> method to create the tool bar control.
*
* @param style
* the tool bar item style
* @see org.eclipse.swt.widgets.ToolBar for valid style bits
*/
public ToolBarManager2(int style) {
super(style);
}
/**
* Creates a tool bar manager for an existing tool bar control. This manager
* becomes responsible for the control, and will dispose of it when the
* manager is disposed.
*
* @param toolbar
* the tool bar control
*/
public ToolBarManager2(ToolBar toolbar) {
super(toolbar);
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.IToolBarManager2#createControl2(org.eclipse.swt.widgets.Composite)
*/
public Control createControl2(Composite parent) {
return createControl(parent);
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.IToolBarManager2#getControl2()
*/
public Control getControl2() {
return getControl();
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.IToolBarManager2#getItemCount()
*/
public int getItemCount() {
ToolBar toolBar = getControl();
if (toolBar == null || toolBar.isDisposed()) {
return 0;
}
return toolBar.getItemCount();
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.IToolBarManager2#addPropertyChangeListener(org.eclipse.jface.util.IPropertyChangeListener)
*/
public void addPropertyChangeListener(IPropertyChangeListener listener) {
if (listenerList == null) {
listenerList = new ListenerList(ListenerList.IDENTITY);
}
listenerList.add(listener);
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.IToolBarManager2#removePropertyChangeListener(org.eclipse.jface.util.IPropertyChangeListener)
*/
public void removePropertyChangeListener(IPropertyChangeListener listener) {
if (listenerList != null) {
listenerList.remove(listener);
if (listenerList.isEmpty()) {
listenerList = null;
}
}
}
/**
* @return the listeners attached to this event manager.
* The listeners currently attached; may be empty, but never
* null.
*
*/
protected final Object[] getListeners() {
final ListenerList list = listenerList;
if (list == null) {
return new Object[0];
}
return list.getListeners();
}
/*
* Notifies any property change listeners that a property has changed. Only
* listeners registered at the time this method is called are notified.
*/
private void firePropertyChange(final PropertyChangeEvent event) {
final Object[] list = getListeners();
for (int i = 0; i < list.length; ++i) {
((IPropertyChangeListener) list[i]).propertyChange(event);
}
}
/*
* Notifies any property change listeners that a property has changed. Only
* listeners registered at the time this method is called are notified. This
* method avoids creating an event object if there are no listeners
* registered, but calls firePropertyChange(PropertyChangeEvent) if there are.
*/
private void firePropertyChange(final String propertyName,
final Object oldValue, final Object newValue) {
if (listenerList != null) {
firePropertyChange(new PropertyChangeEvent(this, propertyName,
oldValue, newValue));
}
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.ToolBarManager#relayout(org.eclipse.swt.widgets.ToolBar, int, int)
*/
protected void relayout(ToolBar layoutBar, int oldCount, int newCount) {
super.relayout(layoutBar, oldCount, newCount);
firePropertyChange(PROP_LAYOUT, new Integer(oldCount), new Integer(newCount));
}
}