/*******************************************************************************
* Copyright (c) 2006 - 2016 Tom Schindl 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:
* Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
* Lars.Vogel <Lars.Vogel@vogella.com> - Bug 414565, 475361, 487940
*******************************************************************************/
package org.eclipse.jface.snippets.viewers;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
/**
* A simple TreeViewer to demonstrate usage
*
*/
public class Snippet002TreeViewer {
private class MyContentProvider implements ITreeContentProvider {
@Override
public Object[] getElements(Object inputElement) {
return ((MyModel)inputElement).child.toArray();
}
@Override
public Object[] getChildren(Object parentElement) {
return getElements(parentElement);
}
@Override
public Object getParent(Object element) {
if( element == null) {
return null;
}
return ((MyModel)element).parent;
}
@Override
public boolean hasChildren(Object element) {
return ((MyModel)element).child.size() > 0;
}
}
public class MyModel {
public MyModel parent;
public List<MyModel> child = new ArrayList<>();
public int counter;
public MyModel(int counter, MyModel parent) {
this.parent = parent;
this.counter = counter;
}
@Override
public String toString() {
String rv = "Item ";
if( parent != null ) {
rv = parent.toString() + ".";
}
rv += counter;
return rv;
}
}
public Snippet002TreeViewer(Shell shell) {
final TreeViewer v = new TreeViewer(shell);
v.setLabelProvider(new LabelProvider());
v.setContentProvider(new MyContentProvider());
v.setInput(createModel());
}
private MyModel createModel() {
MyModel root = new MyModel(0,null);
root.counter = 0;
MyModel tmp;
for( int i = 1; i < 10; i++ ) {
tmp = new MyModel(i, root);
root.child.add(tmp);
for( int j = 1; j < i; j++ ) {
tmp.child.add(new MyModel(j,tmp));
}
}
return root;
}
public static void main(String[] args) {
Display display = new Display ();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
new Snippet002TreeViewer(shell);
shell.open ();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ()) display.sleep ();
}
display.dispose ();
}
}