--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.ui.forms/src/org/eclipse/ui/forms/widgets/TreeNode.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,81 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 IBM Corporation 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:
+ *     IBM Corporation - initial API and implementation
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module org.eclipse.ui.forms.widgets.TreeNode;
+
+import org.eclipse.ui.forms.widgets.ToggleHyperlink;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.PaintEvent;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.widgets.Composite;
+
+import java.lang.all;
+import java.util.Set;
+
+/**
+ * A custom selectable control that can be used to control areas that can be
+ * expanded or collapsed. The control control can be toggled between selected
+ * and deselected state with a mouse or by pressing 'Enter' while the control
+ * has focus.
+ * <p>
+ * The control is rendered as box with a '+' or '-' sign, depending on the
+ * expansion state. Focus indication is rendered around the box when the
+ * control has keyboard focus.
+ *
+ * @see Twistie
+ * @since 3.0
+ */
+public class TreeNode : ToggleHyperlink {
+    /**
+     * Creates a control in a provided composite.
+     *
+     * @param parent
+     *            the parent
+     * @param style
+     *            the style
+     */
+    public this(Composite parent, int style) {
+        super(parent, style);
+        innerWidth = 10;
+        innerHeight = 10;
+    }
+    protected void paint(PaintEvent e) {
+        paintHyperlink(e.gc);
+    }
+    protected void paintHyperlink(GC gc) {
+        Rectangle box = getBoxBounds(gc);
+        gc.setForeground(getDisplay().getSystemColor(
+                SWT.COLOR_WIDGET_NORMAL_SHADOW));
+        gc.drawRectangle(box);
+        gc.setForeground(getForeground());
+        gc.drawLine(box.x + 2, box.y + 4, box.x + 6, box.y + 4);
+        if (!isExpanded()) {
+            gc.drawLine(box.x + 4, box.y + 2, box.x + 4, box.y + 6);
+        }
+        if (paintFocus && getSelection()) {
+            gc.setForeground(getForeground());
+            gc.drawFocus(box.x - 1, box.y - 1, box.width + 3, box.height + 3);
+        }
+    }
+    private Rectangle getBoxBounds(GC gc) {
+        int x = 1;
+        int y = 0;
+        gc.setFont(getFont());
+        //int height = gc.getFontMetrics().getHeight();
+        //y = height / 2 - 4;
+        //y = Math.max(y, 0);
+        y = 2;
+        return new Rectangle(x, y, 8, 8);
+    }
+}