--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/draw2d/FreeformViewport.d	Sun Aug 03 00:52:14 2008 +0200
@@ -0,0 +1,100 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2005 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 dwtx.draw2d.FreeformViewport;
+
+import dwt.dwthelper.utils;
+
+import dwtx.draw2d.geometry.Dimension;
+import dwtx.draw2d.geometry.Rectangle;
+import dwtx.draw2d.Viewport;
+import dwtx.draw2d.ViewportLayout;
+import dwtx.draw2d.IFigure;
+import dwtx.draw2d.FreeformFigure;
+
+/**
+ * A viewport for {@link dwtx.draw2d.FreeformFigure FreeformFigures}.
+ * FreeformFigures can only reside in this type of viewport.
+ */
+public class FreeformViewport
+    : Viewport
+{
+
+class FreeformViewportLayout
+    : ViewportLayout
+{
+    protected Dimension calculatePreferredSize(IFigure parent, int wHint, int hHint) {
+        getContents().validate();
+        wHint = Math.max(0, wHint);
+        hHint = Math.max(0, hHint);
+        return (cast(FreeformFigure)getContents())
+            .getFreeformExtent()
+            .getExpanded(getInsets())
+            .union_(0, 0)
+            .union_(wHint - 1, hHint - 1)
+            .getSize();
+    }
+
+    protected bool isSensitiveHorizontally(IFigure parent) {
+        return true;
+    }
+
+    protected bool isSensitiveVertically(IFigure parent) {
+        return true;
+    }
+
+
+    public void layout(IFigure figure) {
+        //Do nothing, contents updates itself.
+    }
+}
+
+/**
+ * Constructs a new FreeformViewport.  This viewport must use graphics translation to
+ * scroll the FreeformFigures inside of it.
+ */
+public this() {
+    super(true); //Must use graphics translate to scroll freeforms.
+    setLayoutManager(new FreeformViewportLayout());
+}
+
+/**
+ * Readjusts the scrollbars.  In doing so, it gets the freeform extent of the contents and
+ * unions this rectangle with this viewport's client area, then sets the contents freeform
+ * bounds to be this unioned rectangle.  Then proceeds to set the scrollbar values based
+ * on this new information.
+ * @see Viewport#readjustScrollBars()
+ */
+protected void readjustScrollBars() {
+    if (getContents() is null)
+        return;
+    if (!( null !is cast(FreeformFigure)getContents() ))
+        return;
+    FreeformFigure ff = cast(FreeformFigure)getContents();
+    Rectangle clientArea = getClientArea();
+    Rectangle bounds = ff.getFreeformExtent().getCopy();
+    bounds.union_(0, 0, clientArea.width, clientArea.height);
+    ff.setFreeformBounds(bounds);
+
+    getVerticalRangeModel().setAll(bounds.y, clientArea.height, bounds.bottom());
+    getHorizontalRangeModel().setAll(bounds.x, clientArea.width, bounds.right());
+}
+
+/**
+ * Returns <code>true</code>.
+ * @see Figure#useLocalCoordinates()
+ */
+protected bool useLocalCoordinates() {
+    return true;
+}
+
+}