--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/viewers/OwnerDrawLabelProvider.d	Mon Mar 31 00:47:19 2008 +0200
@@ -0,0 +1,211 @@
+/*******************************************************************************
+ * Copyright (c) 2006, 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 dwtx.jface.viewers.OwnerDrawLabelProvider;
+
+import dwtx.jface.viewers.CellLabelProvider;
+import dwtx.jface.viewers.ColumnViewer;
+import dwtx.jface.viewers.ViewerCell;
+
+import dwt.DWT;
+import dwt.graphics.Color;
+import dwt.graphics.Rectangle;
+import dwt.widgets.Event;
+import dwt.widgets.Listener;
+
+import dwt.dwthelper.utils;
+
+/**
+ * OwnerDrawLabelProvider is an abstract implementation of a label provider that
+ * handles custom draw.
+ *
+ * <p>
+ * <b>This class is intended to be subclassed by implementors.</b>
+ * </p>
+ *
+ * @since 3.3
+ *
+ */
+public abstract class OwnerDrawLabelProvider : CellLabelProvider {
+
+    /**
+     * Set up the owner draw callbacks for the viewer.
+     *
+     * @param viewer
+     *            the viewer the owner draw is set up
+     */
+    public static void setUpOwnerDraw(ColumnViewer viewer) {
+        viewer.getControl().addListener(DWT.MeasureItem, new class Listener {
+            ColumnViewer viewer_;
+            this(){
+                viewer_=viewer;
+            }
+            /*
+             * (non-Javadoc)
+             *
+             * @see dwt.widgets.Listener#handleEvent(dwt.widgets.Event)
+             */
+            public void handleEvent(Event event) {
+                CellLabelProvider provider = viewer_
+                        .getViewerColumn(event.index).getLabelProvider();
+                Object element = event.item.getData();
+
+                if ( auto p = cast(OwnerDrawLabelProvider) provider )
+                    p.measure(event, element);
+            }
+        });
+
+        viewer.getControl().addListener(DWT.PaintItem, new class Listener {
+            ColumnViewer viewer_;
+            this(){
+                viewer_=viewer;
+            }
+            /*
+             * (non-Javadoc)
+             *
+             * @see dwt.widgets.Listener#handleEvent(dwt.widgets.Event)
+             */
+            public void handleEvent(Event event) {
+                CellLabelProvider provider = viewer_
+                        .getViewerColumn(event.index).getLabelProvider();
+                Object element = event.item.getData();
+
+                if ( auto p = cast(OwnerDrawLabelProvider) provider )
+                    p.paint(event, element);
+            }
+        });
+
+        viewer.getControl().addListener(DWT.EraseItem, new class Listener {
+            ColumnViewer viewer_;
+            this(){
+                viewer_=viewer;
+            }
+            /*
+             * (non-Javadoc)
+             *
+             * @see dwt.widgets.Listener#handleEvent(dwt.widgets.Event)
+             */
+            public void handleEvent(Event event) {
+
+                CellLabelProvider provider = getLabelProvider(viewer_, event);
+                Object element = getElement(event);
+
+                if ( auto p = cast(OwnerDrawLabelProvider) provider )
+                    p.erase(event, element);
+
+            }
+
+            /**
+             * Return the item for the event
+             *
+             * @param event
+             * @return Object
+             */
+            private Object getElement(Event event) {
+                return event.item.getData();
+            }
+
+            /**
+             * Return the label provider for the column.
+             *
+             * @param viewer
+             * @param event
+             * @return CellLabelProvider
+             */
+            private CellLabelProvider getLabelProvider(
+                    ColumnViewer viewer, Event event) {
+                return viewer.getViewerColumn(event.index).getLabelProvider();
+            }
+        });
+    }
+
+    /**
+     * Handle the erase event. The default implementation colors the background
+     * of selected areas with {@link DWT#COLOR_LIST_SELECTION} and foregrounds
+     * with {@link DWT#COLOR_LIST_SELECTION_TEXT}
+     *
+     * @param event
+     *            the erase event
+     * @param element
+     *            the model object
+     * @see DWT#EraseItem
+     * @see DWT#COLOR_LIST_SELECTION
+     * @see DWT#COLOR_LIST_SELECTION_TEXT
+     */
+    protected void erase(Event event, Object element) {
+
+        Rectangle bounds = event.getBounds();
+        if ((event.detail & DWT.SELECTED) !is 0) {
+
+            Color oldForeground = event.gc.getForeground();
+            Color oldBackground = event.gc.getBackground();
+
+            event.gc.setBackground(event.item.getDisplay().getSystemColor(
+                    DWT.COLOR_LIST_SELECTION));
+            event.gc.setForeground(event.item.getDisplay().getSystemColor(
+                    DWT.COLOR_LIST_SELECTION_TEXT));
+            event.gc.fillRectangle(bounds);
+            /* restore the old GC colors */
+            event.gc.setForeground(oldForeground);
+            event.gc.setBackground(oldBackground);
+            /* ensure that default selection is not drawn */
+            event.detail &= ~DWT.SELECTED;
+
+        }
+
+    }
+
+    /**
+     * Handle the paint event.
+     *
+     * @param event
+     *            the paint event
+     * @param element
+     *            the model element
+     * @see DWT#PaintItem
+     */
+    protected abstract void paint(Event event, Object element);
+
+    /**
+     * Handle the measure event.
+     *
+     * @param event
+     *            the measure event
+     * @param element
+     *            the model element
+     * @see DWT#MeasureItem
+     */
+    protected abstract void measure(Event event, Object element);
+
+    /**
+     * Create a new instance of the receiver based on a column viewer.
+     *
+     */
+    public this() {
+
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see dwtx.jface.viewers.ViewerLabelProvider#update(dwtx.jface.viewers.ViewerCell)
+     */
+    public void update(ViewerCell cell) {
+        // Force a redraw
+        Rectangle cellBounds = cell.getBounds();
+        cell.getControl().redraw(cellBounds.x, cellBounds.y, cellBounds.width,
+                cellBounds.height, true);
+
+    }
+
+}