/* ********************************************************************** **
** Copyright notice **
** **
** (c) 2005-2009 RSSOwl Development Team **
** http://www.rssowl.org/ **
** **
** 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.rssowl.org/legal/epl-v10.html **
** **
** A copy is found in the file epl-v10.html and important notices to the **
** license from the team is found in the textfile LICENSE.txt distributed **
** in this package. **
** **
** This copyright notice MUST APPEAR in all copies of the file! **
** **
** Contributors: **
** RSSOwl Development Team - initial API and implementation **
** **
** ********************************************************************** */
package org.rssowl.ui.internal.util;
import org.eclipse.core.runtime.Assert;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.swt.widgets.Widget;
/**
* A wrapper around a Tree or a TreeItem, with support of Methods that can run
* on both Widgets.
* <p>
* TODO Replace this Helper as soon as there is support for a Interface that
* provides methods shared by Tree and TreeItem.
* </p>
*
* @author bpasero
*/
public class TreeItemAdapter {
private Tree fTree;
private TreeItem fTreeItem;
/**
* @param tree
*/
public TreeItemAdapter(Tree tree) {
Assert.isNotNull(tree);
fTree = tree;
}
/**
* @param item
*/
public TreeItemAdapter(TreeItem item) {
Assert.isNotNull(item);
fTreeItem = item;
}
/**
* @return The number of items contained in this Tree or TreeItem.
*/
public int getItemCount() {
if (fTree != null)
return fTree.getItemCount();
return fTreeItem.getItemCount();
}
/**
* @param index
* @return The TreeItem at the given Index.
*/
public TreeItem getItem(int index) {
if (fTree != null)
return fTree.getItem(index);
return fTreeItem.getItem(index);
}
/**
* @return The Parent of this Adapter.
*/
public TreeItemAdapter getParent() {
if (fTree != null)
return this;
TreeItem parentItem = fTreeItem.getParentItem();
if (parentItem != null)
return new TreeItemAdapter(parentItem);
return new TreeItemAdapter(fTreeItem.getParent());
}
/**
* @param item
* @return The Index of the given Item.
*/
public int indexOf(TreeItem item) {
if (fTree != null)
return fTree.indexOf(item);
return fTreeItem.indexOf(item);
}
/**
* @return The underlying Widget of this Adapter.
*/
public Widget getItem() {
if (fTree != null)
return fTree;
return fTreeItem;
}
/**
* @param item
*/
public void setItem(Widget item) {
if (item instanceof Tree)
setTree((Tree) item);
else if (item instanceof TreeItem)
setTreeItem((TreeItem) item);
}
private void setTree(Tree tree) {
fTree = tree;
fTreeItem = null;
}
private void setTreeItem(TreeItem treeItem) {
fTreeItem = treeItem;
fTree = null;
}
}