/*******************************************************************************
 * Copyright (c) 2006 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 - initial API and implementation
 * Port to the D programming language:
 *     wbaxter at gmail dot com
 *******************************************************************************/

module jface.snippets.Snippet002TreeViewer;

import dwt.DWT;
import dwtx.jface.viewers.ITreeContentProvider;
import dwtx.jface.viewers.LabelProvider;
import dwtx.jface.viewers.TreeViewer;
import dwtx.jface.viewers.Viewer;
import dwt.layout.FillLayout;
import dwt.widgets.Display;
import dwt.widgets.Shell;

import dwt.dwthelper.utils;

import tango.util.Convert;

/**
 * A simple TreeViewer to demonstrate usage
 * 
 * @author Tom Schindl <tom.schindl@bestsolution.at>
 *
 */
class Snippet002TreeViewer {
	private class MyContentProvider : ITreeContentProvider {
		
		/* (non-Javadoc)
		 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
		 */
		public Object[] getElements(Object inputElement) {
			return (cast(MyModel)inputElement).child/*.dup*/;
		}

		/* (non-Javadoc)
		 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
		 */
		public void dispose() {
			
		}

		/* (non-Javadoc)
		 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
		 */
		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
			
		}

		/* (non-Javadoc)
		 * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
		 */
		public Object[] getChildren(Object parentElement) {
			return getElements(parentElement);
		}

		/* (non-Javadoc)
		 * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
		 */
		public Object getParent(Object element) {
			if( element is null) {
				return null;
			}
			
			return (cast(MyModel)element).parent;
		}

		/* (non-Javadoc)
		 * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
		 */
		public bool hasChildren(Object element) {
			return (cast(MyModel)element).child.length > 0;
		}
		
	}
	
	public class MyModel {
		public MyModel parent;
		public MyModel[] child;
		public int counter;
		
		public this(int counter, MyModel parent) {
			this.parent = parent;
			this.counter = counter;
		}
		
		public String toString() {
			String rv = "Item ";
			if( parent !is null ) {
				rv = parent.toString() ~ ".";
			}
			
			rv ~= to!(char[])(counter);
			
			return rv;
		}
	}
	
	public this(Shell shell) {
		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 ~= tmp;
			for( int j = 1; j < i; j++ ) {
				tmp.child ~= new MyModel(j,tmp);
			}
		}
		
		return root;
	}
	
}


void main() {
    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 ();
}