--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jface/snippets/viewers/Snippet014TreeViewerNoMandatoryLabelProvider.d	Fri Aug 08 14:40:21 2008 +0200
@@ -0,0 +1,228 @@
+/*******************************************************************************
+ * 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 snippets.viewers.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;
+
+version(JIVE) import jive.stacktrace;
+
+
+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;
+    }
+
+
+}