--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/dnd/TreeDragSourceEffect.d	Mon Mar 02 14:44:16 2009 +0100
@@ -0,0 +1,202 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2008 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.swt.dnd.TreeDragSourceEffect;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.graphics.PaletteData;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.internal.win32.OS;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.TreeItem;
+
+import org.eclipse.swt.dnd.DragSourceEffect;
+import org.eclipse.swt.dnd.DragSourceEvent;
+
+import java.lang.all;
+
+/**
+ * This class provides default implementations to display a source image
+ * when a drag is initiated from a <code>Tree</code>.
+ *
+ * <p>Classes that wish to provide their own source image for a <code>Tree</code> can
+ * extend <code>TreeDragSourceEffect</code> class and override the <code>TreeDragSourceEffect.dragStart</code>
+ * method and set the field <code>DragSourceEvent.image</code> with their own image.</p>
+ *
+ * Subclasses that override any methods of this class must call the corresponding
+ * <code>super</code> method to get the default drag under effect implementation.
+ *
+ * @see DragSourceEffect
+ * @see DragSourceEvent
+ * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
+ *
+ * @since 3.3
+ */
+public class TreeDragSourceEffect : DragSourceEffect {
+    Image dragSourceImage = null;
+
+    /**
+     * Creates a new <code>TreeDragSourceEffect</code> to handle drag effect
+     * from the specified <code>Tree</code>.
+     *
+     * @param tree the <code>Tree</code> that the user clicks on to initiate the drag
+     */
+    public this(Tree tree) {
+        super(tree);
+    }
+
+    /**
+     * This implementation of <code>dragFinished</code> disposes the image
+     * that was created in <code>TreeDragSourceEffect.dragStart</code>.
+     *
+     * Subclasses that override this method should call <code>super.dragFinished(event)</code>
+     * to dispose the image in the default implementation.
+     *
+     * @param event the information associated with the drag finished event
+     */
+    public void dragFinished(DragSourceEvent event) {
+        if (dragSourceImage !is null) dragSourceImage.dispose();
+        dragSourceImage = null;
+    }
+
+    /**
+     * This implementation of <code>dragStart</code> will create a default
+     * image that will be used during the drag. The image should be disposed
+     * when the drag is completed in the <code>TreeDragSourceEffect.dragFinished</code>
+     * method.
+     *
+     * Subclasses that override this method should call <code>super.dragStart(event)</code>
+     * to use the image from the default implementation.
+     *
+     * @param event the information associated with the drag start event
+     */
+    public void dragStart(DragSourceEvent event) {
+        event.image = getDragSourceImage(event);
+    }
+
+    Image getDragSourceImage(DragSourceEvent event) {
+        if (dragSourceImage !is null) dragSourceImage.dispose();
+        dragSourceImage = null;
+        if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (5, 1)) {
+            SHDRAGIMAGE shdi;
+            int DI_GETDRAGIMAGE = OS.RegisterWindowMessage ("ShellGetDragImage"w.ptr); //$NON-NLS-1$
+            if (OS.SendMessage (control.handle, DI_GETDRAGIMAGE, 0, &shdi) !is 0) {
+                if ((control.getStyle() & SWT.MIRRORED) !is 0) {
+                    event.x += shdi.sizeDragImage.cx - shdi.ptOffset.x;
+                } else {
+                    event.x += shdi.ptOffset.x;
+                }
+                event.y += shdi.ptOffset.y;
+                auto hImage = shdi.hbmpDragImage;
+                if (hImage !is null) {
+                    BITMAP bm;
+                    OS.GetObject (hImage, BITMAP.sizeof, &bm);
+                    int srcWidth = bm.bmWidth;
+                    int srcHeight = bm.bmHeight;
+
+                    /* Create resources */
+                    auto hdc = OS.GetDC (null);
+                    auto srcHdc = OS.CreateCompatibleDC (hdc);
+                    auto oldSrcBitmap = OS.SelectObject (srcHdc, hImage);
+                    auto memHdc = OS.CreateCompatibleDC (hdc);
+                    BITMAPINFOHEADER bmiHeader;
+                    bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
+                    bmiHeader.biWidth = srcWidth;
+                    bmiHeader.biHeight = -srcHeight;
+                    bmiHeader.biPlanes = 1;
+                    bmiHeader.biBitCount = 32;
+                    bmiHeader.biCompression = OS.BI_RGB;
+                    void* pBits;
+                    auto memDib = OS.CreateDIBSection (null, cast(BITMAPINFO*)&bmiHeader, OS.DIB_RGB_COLORS, &pBits, null, 0);
+                    if (memDib is null) SWT.error (SWT.ERROR_NO_HANDLES);
+                    auto oldMemBitmap = OS.SelectObject (memHdc, memDib);
+
+                    BITMAP dibBM;
+                    OS.GetObject (memDib, BITMAP.sizeof, &dibBM);
+                    int sizeInBytes = dibBM.bmWidthBytes * dibBM.bmHeight;
+
+                    /* Get the foreground pixels */
+                    OS.BitBlt (memHdc, 0, 0, srcWidth, srcHeight, srcHdc, 0, 0, OS.SRCCOPY);
+                    byte[] srcData = (cast(byte*)dibBM.bmBits)[ 0 .. sizeInBytes ];
+
+                    PaletteData palette = new PaletteData(0xFF00, 0xFF0000, 0xFF000000);
+                    ImageData data = new ImageData(srcWidth, srcHeight, bm.bmBitsPixel, palette, bm.bmWidthBytes, srcData);
+                    if (shdi.crColorKey is -1) {
+                        byte[] alphaData = new byte[srcWidth * srcHeight];
+                        int spinc = dibBM.bmWidthBytes - srcWidth * 4;
+                        int ap = 0, sp = 3;
+                        for (int y = 0; y < srcHeight; ++y) {
+                            for (int x = 0; x < srcWidth; ++x) {
+                                alphaData [ap++] = srcData [sp];
+                                sp += 4;
+                            }
+                            sp += spinc;
+                        }
+                        data.alphaData = alphaData;
+                    } else {
+                        data.transparentPixel = shdi.crColorKey << 8;
+                    }
+                    dragSourceImage = new Image (control.getDisplay (), data);
+                    OS.SelectObject (memHdc, oldMemBitmap);
+                    OS.DeleteDC (memHdc);
+                    OS.DeleteObject (memDib);
+                    OS.SelectObject (srcHdc, oldSrcBitmap);
+                    OS.DeleteDC (srcHdc);
+                    OS.ReleaseDC (null, hdc);
+                    OS.DeleteObject (hImage);
+                    return dragSourceImage;
+                }
+            }
+            return null;
+        }
+
+        Tree tree = cast(Tree) control;
+        //TEMPORARY CODE
+        if (tree.isListening (SWT.EraseItem) || tree.isListening (SWT.PaintItem)) return null;
+        TreeItem[] selection = tree.getSelection();
+        if (selection.length is 0) return null;
+        auto treeImageList = OS.SendMessage (tree.handle, OS.TVM_GETIMAGELIST, OS.TVSIL_NORMAL, 0);
+        if (treeImageList !is 0) {
+            int count = Math.min(selection.length, 10);
+            Rectangle bounds = selection[0].getBounds(0);
+            for (int i = 1; i < count; i++) {
+                bounds = bounds.makeUnion(selection[i].getBounds(0));
+            }
+            auto hDC = OS.GetDC(tree.handle);
+            auto hDC1 = OS.CreateCompatibleDC(hDC);
+            auto bitmap = OS.CreateCompatibleBitmap(hDC, bounds.width, bounds.height);
+            auto hOldBitmap = OS.SelectObject(hDC1, bitmap);
+            RECT rect;
+            rect.right = bounds.width;
+            rect.bottom = bounds.height;
+            auto hBrush = OS.GetStockObject(OS.WHITE_BRUSH);
+            OS.FillRect(hDC1, &rect, hBrush);
+            for (int i = 0; i < count; i++) {
+                TreeItem selected = selection[i];
+                Rectangle cell = selected.getBounds(0);
+                HANDLE imageList = cast(HANDLE) OS.SendMessage(tree.handle, OS.TVM_CREATEDRAGIMAGE, 0, selected.handle);
+                OS.ImageList_Draw(imageList, 0, hDC1, cell.x - bounds.x, cell.y - bounds.y, OS.ILD_SELECTED);
+                OS.ImageList_Destroy(imageList);
+            }
+            OS.SelectObject(hDC1, hOldBitmap);
+            OS.DeleteDC (hDC1);
+            OS.ReleaseDC (tree.handle, hDC);
+            Display display = tree.getDisplay();
+            dragSourceImage = Image.win32_new(display, SWT.BITMAP, bitmap);
+            return dragSourceImage;
+        }
+        return null;
+    }
+}