/*******************************************************************************
 * 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:
 *     yidabu at gmail dot com  ( D China http://www.d-programming-language-china.org/ ) 
 *******************************************************************************/

module jface.snippets.Snippet014TreeViewerNoMandatoryLabelProvider;


import dwtx.jface.resource.FontRegistry;
import dwtx.jface.viewers.ITableColorProvider;
import dwtx.jface.viewers.ITableFontProvider;
import dwtx.jface.viewers.ITableLabelProvider;
import dwtx.jface.viewers.ITreeContentProvider;
import dwtx.jface.viewers.LabelProvider;
import dwtx.jface.viewers.TreeViewer;
import dwtx.jface.viewers.Viewer;
import dwt.DWT;
import dwt.graphics.Color;
import dwt.graphics.Font;
import dwt.graphics.Image;
import dwt.layout.FillLayout;
import dwt.widgets.Display;
import dwt.widgets.Shell;
import dwt.widgets.TreeColumn;

import dwt.dwthelper.utils;

import tango.util.Convert;
import tango.util.container.LinkedList;



void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    new Snippet014TreeViewerNoMandatoryLabelProvider(shell);
    shell.open();

    while (!shell.isDisposed()) {
        if (!display.readAndDispatch())
            display.sleep();
    }

    display.dispose();
}

/**
 * A simple TreeViewer to demonstrate usage
 * 
 * @author Tom Schindl <tom.schindl@bestsolution.at>
 * 
 */
public class Snippet014TreeViewerNoMandatoryLabelProvider {
    alias  LinkedList!(MyModel) ArrayList;
    
	private class MyContentProvider : ITreeContentProvider {

		/*
		 * (non-Javadoc)
		 * 
		 * @see dwtx.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
		 */
		public Object[] getElements(Object inputElement) {
			return (cast(MyModel) inputElement).child.toArray();
		}

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

		}

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

		}

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

		/*
		 * (non-Javadoc)
		 * 
		 * @see dwtx.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 dwtx.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
		 */
		public bool hasChildren(Object element) {
			return (cast(MyModel) element).child.size() > 0;
		}

	}

	public class MyModel {
		public MyModel parent;

		public ArrayList child;

		public int counter;

		public this(int counter, MyModel parent) {
			this.parent = parent;
			this.counter = counter;
            child = new ArrayList();
		}

		public String toString() {
			String rv = "Item ";
			if (parent !is null) {
				rv = parent.toString() ~ ".";
			}

			rv ~= to!(String)(counter);

			return rv;
		}
	}

	public class MyLabelProvider : LabelProvider,
			ITableLabelProvider, ITableFontProvider, ITableColorProvider {
		FontRegistry registry;
        this()
        {
            registry = new FontRegistry();                    
        }

		public Image getColumnImage(Object element, int columnIndex) {
			return null;
		}

		public String getColumnText(Object element, int columnIndex) {
			return "Column " ~ to!(String)(columnIndex) ~ " => " ~ element.toString();
		}

		public Font getFont(Object element, int columnIndex) {
			if ((cast(MyModel) element).counter % 2 == 0) {
				return registry.getBold(Display.getCurrent().getSystemFont()
						.getFontData()[0].getName());
			}
			return null;
		}

		public Color getBackground(Object element, int columnIndex) {
			if ((cast(MyModel) element).counter % 2 == 0) {
				return Display.getCurrent().getSystemColor(DWT.COLOR_RED);
			}
			return null;
		}

		public Color getForeground(Object element, int columnIndex) {
			if ((cast(MyModel) element).counter % 2 == 1) {
				return Display.getCurrent().getSystemColor(DWT.COLOR_RED);
			}
			return null;
		}

	}

	public this(Shell shell) {
		final TreeViewer v = new TreeViewer(shell);
		
		TreeColumn column = new TreeColumn(v.getTree(),DWT.NONE);
		column.setWidth(200);
		column.setText("Column 1");
		
		column = new TreeColumn(v.getTree(),DWT.NONE);
		column.setWidth(200);
		column.setText("Column 2");
		
		v.setLabelProvider(new MyLabelProvider());
		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;
	}


}