--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/widgets/CoolBar.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,1191 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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
+ *******************************************************************************/
+module dwt.widgets.CoolBar;
+
+import dwt.dwthelper.utils;
+
+
+import dwt.DWT;
+import dwt.DWTException;
+import dwt.graphics.Color;
+import dwt.graphics.Cursor;
+import dwt.graphics.GC;
+import dwt.graphics.Point;
+import dwt.graphics.Rectangle;
+
+/**
+ * Instances of this class provide an area for dynamically
+ * positioning the items they contain.
+ * <p>
+ * The item children that may be added to instances of this class
+ * must be of type <code>CoolItem</code>.
+ * </p><p>
+ * Note that although this class is a subclass of <code>Composite</code>,
+ * it does not make sense to add <code>Control</code> children to it,
+ * or set a layout on it.
+ * </p><p>
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>FLAT, HORIZONTAL, VERTICAL</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>(none)</dd>
+ * </dl>
+ * </p><p>
+ * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.
+ * </p><p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ * </p>
+ */
+public class CoolBar extends Composite {
+    CoolItem[][] items = new CoolItem[0][0];
+    CoolItem[] originalItems = new CoolItem[0];
+    Cursor hoverCursor, dragCursor, cursor;
+    CoolItem dragging = null;
+    int mouseXOffset, itemXOffset;
+    bool isLocked = false;
+    bool inDispose = false;
+    static final int ROW_SPACING = 2;
+    static final int CLICK_DISTANCE = 3;
+    static final int DEFAULT_COOLBAR_WIDTH = 0;
+    static final int DEFAULT_COOLBAR_HEIGHT = 0;
+    
+/**
+ * Constructs a new instance of this class given its parent
+ * and a style value describing its behavior and appearance.
+ * <p>
+ * The style value is either one of the style constants defined in
+ * class <code>DWT</code> which is applicable to instances of this
+ * class, or must be built by <em>bitwise OR</em>'ing together 
+ * (that is, using the <code>int</code> "|" operator) two or more
+ * of those <code>DWT</code> style constants. The class description
+ * lists the style constants that are applicable to the class.
+ * Style bits are also inherited from superclasses.
+ * </p>
+ *
+ * @param parent a composite control which will be the parent of the new instance (cannot be null)
+ * @param style the style of control to construct
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ *
+ * @see DWT
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public CoolBar (Composite parent, int style) {
+    super (parent, checkStyle(style));
+    if ((style & DWT.VERTICAL) !is 0) {
+        this.style |= DWT.VERTICAL;
+        hoverCursor = new Cursor(display, DWT.CURSOR_SIZENS);
+    } else {
+        this.style |= DWT.HORIZONTAL;
+        hoverCursor = new Cursor(display, DWT.CURSOR_SIZEWE);
+    }
+    dragCursor = new Cursor(display, DWT.CURSOR_SIZEALL);
+    Listener listener = new Listener() {
+        public void handleEvent(Event event) {
+            switch (event.type) {
+                case DWT.Dispose:           onDispose(event);           break;
+                case DWT.MouseDown:         onMouseDown(event);         break;
+                case DWT.MouseExit:         onMouseExit();              break;
+                case DWT.MouseMove:         onMouseMove(event);         break;
+                case DWT.MouseUp:           onMouseUp(event);           break;
+                case DWT.MouseDoubleClick:  onMouseDoubleClick(event);  break;
+                case DWT.Paint:             onPaint(event);             break;
+                case DWT.Resize:            onResize();                 break;
+            }
+        }
+    };
+    int[] events = new int[] { 
+        DWT.Dispose, 
+        DWT.MouseDown,
+        DWT.MouseExit, 
+        DWT.MouseMove, 
+        DWT.MouseUp, 
+        DWT.MouseDoubleClick,
+        DWT.Paint,
+        DWT.Resize
+    };
+    for (int i = 0; i < events.length; i++) {
+        addListener(events[i], listener);   
+    }
+}
+static int checkStyle (int style) {
+    style |= DWT.NO_FOCUS;
+    return (style | DWT.NO_REDRAW_RESIZE) & ~(DWT.V_SCROLL | DWT.H_SCROLL);
+}
+void _setCursor (Cursor cursor) {
+    if (this.cursor !is null) return;
+    super.setCursor (cursor);
+}
+protected void checkSubclass () {
+    if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
+}
+public Point computeSize (int wHint, int hHint, bool changed) {
+    checkWidget();
+    int width = 0, height = 0;
+    wrapItems((style & DWT.VERTICAL) !is 0 ? hHint : wHint);
+    bool flat = (style & DWT.FLAT) !is 0;
+    for (int row = 0; row < items.length; row++) {
+        int rowWidth = 0, rowHeight = 0;
+        for (int i = 0; i < items[row].length; i++) {
+            CoolItem item = items[row][i];
+            rowWidth += item.preferredWidth;
+            rowHeight = Math.max(rowHeight, item.preferredHeight);
+        }
+        height += rowHeight;
+        if (!flat && row > 0) height += ROW_SPACING;
+        width = Math.max(width, rowWidth);
+    }
+    wrapItems(getWidth());
+    if (width is 0) width = DEFAULT_COOLBAR_WIDTH;
+    if (height is 0) height = DEFAULT_COOLBAR_HEIGHT;
+    if (wHint !is DWT.DEFAULT) width = wHint;
+    if (hHint !is DWT.DEFAULT) height = hHint;
+    Rectangle trim = computeTrim(0, 0, width, height);
+    return fixPoint(trim.width, trim.height);
+}
+CoolItem getGrabbedItem(int x, int y) {
+    for (int row = 0; row < items.length; row++) {
+        for (int i = 0; i < items[row].length; i++) {
+            CoolItem item = items[row][i];
+            Rectangle bounds = item.internalGetBounds();
+            bounds.width = CoolItem.MINIMUM_WIDTH;
+            if (bounds.x > x) break;
+            if (bounds.y > y) return null;
+            if (bounds.contains(x, y)) {
+                return item;    
+            }   
+        }   
+    }
+    return null;
+}
+/**
+ * Returns the item that is currently displayed at the given,
+ * zero-relative index. Throws an exception if the index is
+ * out of range.
+ *
+ * @param index the visual index of the item to return
+ * @return the item at the given visual index
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public CoolItem getItem (int index) {
+    checkWidget();
+    if (index < 0) error (DWT.ERROR_INVALID_RANGE);
+    for (int row = 0; row < items.length; row++) {
+        if (items[row].length > index) {
+            return items[row][index];           
+        } else {
+            index -= items[row].length;
+        }
+    }
+    error (DWT.ERROR_INVALID_RANGE);
+    return null;
+}
+/**
+ * Returns the number of items contained in the receiver.
+ *
+ * @return the number of items
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int getItemCount () {
+    checkWidget();
+    return originalItems.length;
+}
+/**
+ * Returns an array of <code>CoolItem</code>s in the order
+ * in which they are currently being displayed.
+ * <p>
+ * Note: This is not the actual structure used by the receiver
+ * to maintain its list of items, so modifying the array will
+ * not affect the receiver. 
+ * </p>
+ *
+ * @return the receiver's items in their current visual order
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public CoolItem [] getItems () {
+    checkWidget();
+    CoolItem [] result = new CoolItem [getItemCount()];
+    int offset = 0;
+    for (int row = 0; row < items.length; row++) {
+        System.arraycopy(items[row], 0, result, offset, items[row].length);
+        offset += items[row].length;
+    }
+    return result;
+}
+Point findItem (CoolItem item) {
+    for (int row = 0; row < items.length; row++) {
+        for (int i = 0; i < items[row].length; i++) {
+            if (items[row][i].equals(item)) return new Point(i, row);       
+        }
+    }
+    return new Point(-1, -1);
+}
+void fixEvent (Event event) {
+    if ((style & DWT.VERTICAL) !is 0) {
+        int tmp = event.x;
+        event.x = event.y;
+        event.y = tmp;
+    }
+}
+Rectangle fixRectangle (int x, int y, int width, int height) {
+    if ((style & DWT.VERTICAL) !is 0) {
+        return new Rectangle(y, x, height, width);
+    }
+    return new Rectangle(x, y, width, height);
+}
+Point fixPoint (int x, int y) {
+    if ((style & DWT.VERTICAL) !is 0) {
+        return new Point(y, x);
+    }
+    return new Point(x, y); 
+}
+/**
+ * Searches the receiver's items in the order they are currently
+ * being displayed, starting at the first item (index 0), until
+ * an item is found that is equal to the argument, and returns
+ * the index of that item. If no item is found, returns -1.
+ *
+ * @param item the search item
+ * @return the visual order index of the search item, or -1 if the item is not found
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the item is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the item is disposed</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int indexOf (CoolItem item) {
+    checkWidget();
+    if (item is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (item.isDisposed()) error (DWT.ERROR_INVALID_ARGUMENT);
+    int answer = 0;
+    for (int row = 0; row < items.length; row++) {
+        for (int i = 0; i < items[row].length; i++) {
+            if (items[row][i].equals(item)) {
+                return answer;      
+            } else {
+                answer++;
+            }
+        }
+    }
+    return -1;
+}
+/**
+ * Insert the item into the row. Adjust the x and width values
+ * appropriately.
+ */
+void insertItemIntoRow(CoolItem item, int rowIndex, int x_root) {
+    int barWidth = getWidth();
+    int rowY = items[rowIndex][0].internalGetBounds().y;
+    int x = Math.max(0, Math.abs(x_root - toDisplay(new Point(0, 0)).x));
+    
+    /* Find the insertion index and add the item. */
+    int index;
+    for (index = 0; index < items[rowIndex].length; index++) {
+        if (x < items[rowIndex][index].internalGetBounds().x) break;
+    }
+    if (index is 0) {
+        item.wrap = true;
+        items[rowIndex][0].wrap = false;
+    }
+    int oldLength = items[rowIndex].length;
+    CoolItem[] newRow = new CoolItem[oldLength + 1];
+    System.arraycopy(items[rowIndex], 0, newRow, 0, index);
+    newRow[index] = item;
+    System.arraycopy(items[rowIndex], index, newRow, index + 1, oldLength - index);
+    items[rowIndex] = newRow;
+
+    /* Adjust the width of the item to the left. */
+    if (index > 0) {
+        CoolItem left = items[rowIndex][index - 1];
+        Rectangle leftBounds = left.internalGetBounds();
+        int newWidth = x - leftBounds.x;
+        if (newWidth < left.internalGetMinimumWidth()) {
+            x += left.internalGetMinimumWidth() - newWidth;
+            newWidth = left.internalGetMinimumWidth();
+        }
+        left.setBounds(leftBounds.x, leftBounds.y, newWidth, leftBounds.height);
+        left.requestedWidth = newWidth;
+    }
+    
+    /* Set the item's bounds. */
+    int width = 0, height = item.internalGetBounds().height;
+    if (index < items[rowIndex].length - 1) {
+        CoolItem right = items[rowIndex][index + 1];
+        width = right.internalGetBounds().x - x;
+        if (width < right.internalGetMinimumWidth()) {
+            moveRight(right, right.internalGetMinimumWidth() - width);
+            width = right.internalGetBounds().x - x;
+        }
+        item.setBounds(x, rowY, width, height);
+        if (width < item.internalGetMinimumWidth()) moveLeft(item, item.internalGetMinimumWidth() - width);
+    } else {
+        width = Math.max(item.internalGetMinimumWidth(), barWidth - x);
+        item.setBounds(x, rowY, width, height);
+        if (x + width > barWidth) moveLeft(item, x + width - barWidth); 
+    }
+    Rectangle bounds = item.internalGetBounds();
+    item.requestedWidth = bounds.width;
+    internalRedraw(bounds.x, bounds.y, item.internalGetMinimumWidth(), bounds.height);
+}
+void internalRedraw (int x, int y, int width, int height) {
+    if ((style & DWT.VERTICAL) !is 0) {
+        redraw (y, x, height, width, false);
+    } else {
+        redraw (x, y, width, height, false);
+    }
+}
+void createItem (CoolItem item, int index) {
+    int itemCount = getItemCount(), row = 0;
+    if (!(0 <= index && index <= itemCount)) error (DWT.ERROR_INVALID_RANGE);
+    if (items.length is 0) {
+        items = new CoolItem[1][1];
+        items[0][0] = item; 
+    } else {
+        int i = index;
+        /* find the row to insert into */
+        if (index < itemCount) {
+            while (i > items[row].length) {
+                i -= items[row].length;
+                row++;
+            }   
+        } else {
+            row = items.length - 1;
+            i = items[row].length;  
+        }
+        
+        // Set the last item in the row to the preferred size 
+        // and add the new one just to it's right
+        int lastIndex = items[row].length - 1;
+        CoolItem lastItem = items[row][lastIndex];
+        if (lastItem.ideal) {
+            Rectangle bounds = lastItem.internalGetBounds();
+            bounds.width = lastItem.preferredWidth;
+            bounds.height = lastItem.preferredHeight;
+            lastItem.requestedWidth = lastItem.preferredWidth;
+            lastItem.setBounds(bounds.x, bounds.y, bounds.width, bounds.height);  
+        }
+        if (i is 0) {
+            item.wrap = true;
+            items[row][0].wrap = false;
+        }
+        int oldLength = items[row].length;
+        CoolItem[] newRow = new CoolItem[oldLength + 1];
+        System.arraycopy(items[row], 0, newRow, 0, i);
+        newRow[i] = item;
+        System.arraycopy(items[row], i, newRow, i + 1, oldLength - i);
+        items[row] = newRow;
+    }
+    item.requestedWidth = CoolItem.MINIMUM_WIDTH;
+    
+    int length = originalItems.length;
+    CoolItem [] newOriginals = new CoolItem [length + 1];
+    System.arraycopy (originalItems, 0, newOriginals, 0, index);
+    System.arraycopy (originalItems, index, newOriginals, index + 1, length - index);
+    newOriginals [index] = item;
+    originalItems = newOriginals;
+    layoutItems();
+
+}
+void destroyItem(CoolItem item) {
+    if (inDispose) return;
+    int row = findItem(item).y;
+    if (row is -1) return;
+    Rectangle bounds = item.internalGetBounds();
+    removeItemFromRow(item, row, true);
+    
+    int index = 0;
+    while (index < originalItems.length) {
+        if (originalItems [index] is item) break;
+        index++;
+    }
+    int length = originalItems.length - 1;
+    CoolItem [] newOriginals = new CoolItem [length];
+    System.arraycopy (originalItems, 0, newOriginals, 0, index);
+    System.arraycopy (originalItems, index + 1, newOriginals, index, length - index);
+    originalItems = newOriginals;
+    
+    internalRedraw(bounds.x, bounds.y, CoolItem.MINIMUM_WIDTH, bounds.height);
+    relayout();
+}
+void moveDown(CoolItem item, int x_root) {
+    int oldRowIndex = findItem(item).y;
+    bool resize = false;
+    if (items[oldRowIndex].length is 1) {
+        resize = true;
+        /* If this is the only item in the bottom row, don't move it. */
+        if (oldRowIndex is items.length - 1) return;
+    }
+    int newRowIndex = (items[oldRowIndex].length is 1) ? oldRowIndex : oldRowIndex + 1;
+    removeItemFromRow(item, oldRowIndex, false);
+    Rectangle old = item.internalGetBounds();
+    internalRedraw(old.x, old.y, CoolItem.MINIMUM_WIDTH, old.height);
+    if (newRowIndex is items.length) {
+        /* Create a new bottom row for the item. */
+        CoolItem[][] newRows = new CoolItem[items.length + 1][];
+        System.arraycopy(items, 0, newRows, 0, items.length);
+        int row = items.length;
+        newRows[row] = new CoolItem[1];
+        newRows[row][0] = item;
+        items = newRows;
+        resize = true;
+        item.wrap = true;
+    } else {    
+        insertItemIntoRow(item, newRowIndex, x_root);
+    }
+    if (resize) {
+        relayout();
+    } else {
+        layoutItems();
+    }
+}
+void moveLeft(CoolItem item, int pixels) {
+    Point point = findItem(item);
+    int row = point.y;
+    int index = point.x;
+    if (index is 0) return; 
+    Rectangle bounds = item.internalGetBounds();
+    int minSpaceOnLeft = 0;
+    for (int i = 0; i < index; i++) {
+        minSpaceOnLeft += items[row][i].internalGetMinimumWidth();
+    }
+    int x = Math.max(minSpaceOnLeft, bounds.x - pixels);
+    CoolItem left = items[row][index - 1];
+    Rectangle leftBounds = left.internalGetBounds();
+    if (leftBounds.x + left.internalGetMinimumWidth() > x) {
+        int shift = leftBounds.x + left.internalGetMinimumWidth() - x;
+        moveLeft(left, shift);
+        leftBounds = left.internalGetBounds();
+    }
+    int leftWidth = Math.max(left.internalGetMinimumWidth(), leftBounds.width - pixels);
+    left.setBounds(leftBounds.x, leftBounds.y, leftWidth, leftBounds.height);
+    left.requestedWidth = leftWidth;
+    int width = bounds.width + (bounds.x - x);
+    item.setBounds(x, bounds.y, width, bounds.height);
+    item.requestedWidth = width;
+
+    int damagedWidth = bounds.x - x + CoolItem.MINIMUM_WIDTH;
+    if (damagedWidth > CoolItem.MINIMUM_WIDTH) {
+        internalRedraw(x, bounds.y, damagedWidth, bounds.height);
+    }
+}
+void moveRight(CoolItem item, int pixels) {
+    Point point = findItem(item);
+    int row = point.y;
+    int index = point.x;
+    if (index is 0) return; 
+    Rectangle bounds = item.internalGetBounds();
+    int minSpaceOnRight = 0;
+    for (int i = index; i < items[row].length; i++) {
+        minSpaceOnRight += items[row][i].internalGetMinimumWidth(); 
+    }
+    int max = getWidth() - minSpaceOnRight;
+    int x = Math.min(max, bounds.x + pixels);   
+    int width = 0;
+    if (index + 1 is items[row].length) {
+        width = getWidth() - x;
+    } else {
+        CoolItem right = items[row][index + 1];
+        Rectangle rightBounds = right.internalGetBounds();
+        if (x + item.internalGetMinimumWidth() > rightBounds.x) {
+            int shift = x + item.internalGetMinimumWidth() - rightBounds.x;
+            moveRight(right, shift);
+            rightBounds = right.internalGetBounds();
+        }
+        width = rightBounds.x - x;
+    }
+    item.setBounds(x, bounds.y, width, bounds.height);
+    item.requestedWidth = width;
+    CoolItem left = items[row][index - 1];
+    Rectangle leftBounds = left.internalGetBounds();
+    int leftWidth = x - leftBounds.x;
+    left.setBounds(leftBounds.x, leftBounds.y, leftWidth, leftBounds.height);
+    left.requestedWidth = leftWidth;
+    
+    int damagedWidth = x - bounds.x + CoolItem.MINIMUM_WIDTH + CoolItem.MARGIN_WIDTH;
+    if (x - bounds.x > 0) {
+        internalRedraw(bounds.x - CoolItem.MARGIN_WIDTH, bounds.y, damagedWidth, bounds.height);
+    }
+}
+void moveUp(CoolItem item, int x_root) {
+    Point point = findItem(item);
+    int oldRowIndex = point.y;
+    bool resize = false;
+    if (items[oldRowIndex].length is 1) {
+        resize = true;
+        /* If this is the only item in the top row, don't move it. */
+        if (oldRowIndex is 0) return;
+    }
+    removeItemFromRow(item, oldRowIndex, false);
+    Rectangle old = item.internalGetBounds();
+    internalRedraw(old.x, old.y, CoolItem.MINIMUM_WIDTH, old.height);
+    int newRowIndex = Math.max(0, oldRowIndex - 1);
+    if (oldRowIndex is 0) {
+        /* Create a new top row for the item. */
+        CoolItem[][] newRows = new CoolItem[items.length + 1][];
+        System.arraycopy(items, 0, newRows, 1, items.length);
+        newRows[0] = new CoolItem[1];
+        newRows[0][0] = item;
+        items = newRows;
+        resize = true;
+        item.wrap = true;
+    } else {
+        insertItemIntoRow(item, newRowIndex, x_root);
+    }
+    if (resize) {
+        relayout();
+    } else {
+        layoutItems();
+    }
+}
+void onDispose(Event event) {
+    /*
+     * Usually when an item is disposed, destroyItem will change the size of the items array
+     * and reset the bounds of all the remaining cool items.
+     * Since the whole cool bar is being disposed, this is not necessary.  For speed
+     * the inDispose flag is used to skip over this part of the item dispose.
+     */
+    if (inDispose) return;
+    inDispose = true;
+    notifyListeners(DWT.Dispose, event);
+    event.type = DWT.None;
+    for (int i = 0; i < items.length; i++) {
+        for (int j = 0; j < items[i].length; j++) {
+            items[i][j].dispose();
+        }
+    }
+    hoverCursor.dispose();
+    dragCursor.dispose();
+    cursor = null;
+}
+void onMouseDown(Event event) {
+    if (isLocked || event.button !is 1) return;
+    fixEvent(event);
+    dragging = getGrabbedItem(event.x, event.y);
+    if (dragging !is null) {
+        mouseXOffset = event.x;
+        itemXOffset = mouseXOffset - dragging.internalGetBounds().x;
+        _setCursor(dragCursor);
+    }
+    fixEvent(event);
+}
+void onMouseExit() {
+    if (dragging is null) _setCursor(null);
+}
+void onMouseMove(Event event) {
+    if (isLocked) return;
+    fixEvent(event);
+    CoolItem grabbed = getGrabbedItem(event.x, event.y);
+    if (dragging !is null) {
+        int left_root = toDisplay(new Point(event.x - itemXOffset, event.y)).x;
+        Rectangle bounds = dragging.internalGetBounds();
+        if (event.y < bounds.y) {
+            moveUp(dragging, left_root);
+        } else if (event.y > bounds.y + bounds.height){
+            moveDown(dragging, left_root);
+        } else if (event.x < mouseXOffset) {
+            int distance = Math.min(mouseXOffset, bounds.x + itemXOffset) - event.x;
+            if (distance > 0) moveLeft(dragging, distance);
+        } else if (event.x > mouseXOffset) {
+            int distance = event.x - Math.max(mouseXOffset, bounds.x + itemXOffset);
+            if (distance > 0) moveRight(dragging, distance);
+        }
+        mouseXOffset = event.x;     
+    } else {
+        if (grabbed !is null) {
+            _setCursor(hoverCursor);
+        } else {
+            _setCursor(null);   
+        }
+    }
+    fixEvent(event);
+}
+void onMouseUp(Event event) {
+    _setCursor(null);
+    dragging = null;
+}
+void onMouseDoubleClick(Event event) {
+    if (isLocked) return;   
+    dragging = null;
+    fixEvent(event);
+    CoolItem target = getGrabbedItem(event.x, event.y);
+    if (target is null) {
+        _setCursor(null);
+    } else {
+        Point location = findItem(target);
+        int row = location.y;
+        int index = location.x;
+        if (items[row].length > 1) {
+            Rectangle  bounds = target.internalGetBounds();
+            int maxSize = getWidth ();
+            for (int i = 0; i < items[row].length; i++) {
+                if (i !is index) {
+                    maxSize -= items[row][i].internalGetMinimumWidth(); 
+                }
+            }
+            if (bounds.width is maxSize) {
+                /* The item is at its maximum width. It should be resized to its minimum width. */
+                int distance = bounds.width - target.internalGetMinimumWidth();
+                if (index + 1 < items[row].length) {
+                    /* There is an item to the right. Maximize it. */
+                    CoolItem right = items[row][index + 1];
+                    moveLeft(right, distance);
+                } else {
+                    /* There is no item to the right. Move the item all the way right. */
+                    moveRight(target, distance);
+                }
+            } else if (bounds.width < target.preferredWidth) {
+                /* The item is less than its preferredWidth. Resize to preferredWidth. */
+                int distance = target.preferredWidth - bounds.width;
+                if (index + 1 < items[row].length) {
+                    CoolItem right = items[row][index + 1];
+                    moveRight(right, distance); 
+                    distance = target.preferredWidth - target.internalGetBounds().width;
+                }
+                if (distance > 0) {
+                    moveLeft(target, distance);
+                }
+            } else {
+                /* The item is at its minimum width. Maximize it. */
+                for (int i = 0; i < items[row].length; i++) {
+                    if (i !is index) {
+                        CoolItem item = items[row][i];
+                        item.requestedWidth = Math.max(item.internalGetMinimumWidth(), CoolItem.MINIMUM_WIDTH); 
+                    }
+                }
+                target.requestedWidth = maxSize;
+                layoutItems();
+            }
+            _setCursor(hoverCursor);
+        }
+    }
+    fixEvent(event);
+}
+void onPaint(Event event) {
+    GC gc = event.gc;
+    if (items.length is 0) return;
+    Color shadowColor = display.getSystemColor(DWT.COLOR_WIDGET_NORMAL_SHADOW);
+    Color highlightColor = display.getSystemColor(DWT.COLOR_WIDGET_HIGHLIGHT_SHADOW);
+    bool vertical = (style & DWT.VERTICAL) !is 0;
+    bool flat = (style & DWT.FLAT) !is 0;
+    int stopX = getWidth();
+    Rectangle rect;
+    Rectangle clipping = gc.getClipping();
+    for (int row = 0; row < items.length; row++) {
+        Rectangle bounds = new Rectangle(0, 0, 0, 0);
+        for (int i = 0; i < items[row].length; i++) {
+            bounds = items[row][i].internalGetBounds();
+            rect = fixRectangle(bounds.x, bounds.y, bounds.width, bounds.height);
+            if (!clipping.intersects(rect)) continue;
+            bool nativeGripper = false;
+            
+            /* Draw gripper. */
+            if (!isLocked) {
+                rect = fixRectangle(bounds.x, bounds.y, CoolItem.MINIMUM_WIDTH, bounds.height);
+                if (!flat)  nativeGripper = drawGripper(rect.x, rect.y, rect.width, rect.height, vertical);
+                if (!nativeGripper) {
+                    int grabberTrim = 2; 
+                    int grabberHeight = bounds.height - (2 * grabberTrim) - 1;
+                    gc.setForeground(shadowColor);
+                    rect = fixRectangle(
+                            bounds.x + CoolItem.MARGIN_WIDTH, 
+                            bounds.y + grabberTrim, 
+                            2, 
+                            grabberHeight);
+                    gc.drawRectangle(rect);
+                    gc.setForeground(highlightColor);
+                    rect = fixRectangle(
+                            bounds.x + CoolItem.MARGIN_WIDTH, 
+                            bounds.y + grabberTrim + 1, 
+                            bounds.x + CoolItem.MARGIN_WIDTH, 
+                            bounds.y + grabberTrim + grabberHeight - 1);
+                    gc.drawLine(rect.x, rect.y, rect.width, rect.height);
+                    rect = fixRectangle(
+                            bounds.x + CoolItem.MARGIN_WIDTH, 
+                            bounds.y + grabberTrim, 
+                            bounds.x + CoolItem.MARGIN_WIDTH + 1, 
+                            bounds.y + grabberTrim);
+                    gc.drawLine(rect.x, rect.y, rect.width, rect.height);
+                }
+            }
+            
+            /* Draw separator. */
+            if (!flat && !nativeGripper && i !is 0) {
+                gc.setForeground(shadowColor);
+                rect = fixRectangle(bounds.x, bounds.y, bounds.x, bounds.y + bounds.height - 1);
+                gc.drawLine(rect.x, rect.y, rect.width, rect.height);
+                gc.setForeground(highlightColor);
+                rect = fixRectangle(bounds.x + 1, bounds.y, bounds.x + 1, bounds.y + bounds.height - 1);
+                gc.drawLine(rect.x, rect.y, rect.width, rect.height);
+            }
+        }
+        if (!flat && row + 1 < items.length) {
+            /* Draw row separator. */
+            int separatorY = bounds.y + bounds.height;
+            gc.setForeground(shadowColor);
+            rect = fixRectangle(0, separatorY, stopX, separatorY);
+            gc.drawLine(rect.x, rect.y, rect.width, rect.height);   
+            gc.setForeground(highlightColor);
+            rect = fixRectangle(0, separatorY + 1, stopX, separatorY + 1);
+            gc.drawLine(rect.x, rect.y, rect.width, rect.height);
+        }
+    }
+}
+void onResize () {
+    layoutItems ();
+}
+void removeControl (Control control) {
+    super.removeControl (control);
+    CoolItem [] items = getItems ();
+    for (int i=0; i<items.length; i++) {
+        CoolItem item = items [i];
+        if (item.control is control) item.setControl (null);
+    }
+}
+/**
+ * Remove the item from the row. Adjust the x and width values
+ * appropriately.
+ */
+void removeItemFromRow(CoolItem item, int rowIndex, bool disposed) {
+    int index = findItem(item).x;
+    int newLength = items[rowIndex].length - 1;
+    Rectangle itemBounds = item.internalGetBounds();
+    item.wrap = false;
+    if (newLength > 0) {
+        CoolItem[] newRow = new CoolItem[newLength];
+        System.arraycopy(items[rowIndex], 0, newRow, 0, index);
+        System.arraycopy(items[rowIndex], index + 1, newRow, index, newRow.length - index);
+        items[rowIndex] = newRow;
+        items[rowIndex][0].wrap = true;
+    } else {
+        CoolItem[][] newRows = new CoolItem[items.length - 1][];
+        System.arraycopy(items, 0, newRows, 0, rowIndex);
+        System.arraycopy(items, rowIndex + 1, newRows, rowIndex, newRows.length - rowIndex);
+        items = newRows;
+        return;
+    }
+    if (!disposed) {
+        if (index is 0) {
+            CoolItem first = items[rowIndex][0];
+            Rectangle bounds = first.internalGetBounds();
+            int width = bounds.x + bounds.width;
+            first.setBounds(0, bounds.y, width, bounds.height);
+            first.requestedWidth = width;
+            internalRedraw(bounds.x, bounds.y, CoolItem.MINIMUM_WIDTH, bounds.height);
+        } else {
+            CoolItem previous = items[rowIndex][index - 1];
+            Rectangle bounds = previous.internalGetBounds();
+            int width = bounds.width + itemBounds.width;
+            previous.setBounds(bounds.x, bounds.y, width, bounds.height);
+            previous.requestedWidth = width;
+        }
+    }
+}
+/**
+ * Return the height of the bar after it has
+ * been properly laid out for the given width.
+ */
+int layoutItems () {
+    int y = 0, width;
+    if ((style&DWT.VERTICAL) !is 0) {
+        width = getClientArea().height; 
+    } else {
+        width = getClientArea().width;
+    }
+    wrapItems(width);
+    int rowSpacing = (style & DWT.FLAT) !is 0 ? 0 : ROW_SPACING; 
+    for (int row = 0; row < items.length; row++) {
+        int count = items[row].length;
+        int x = 0;
+
+        /* determine the height and the available width for the row */
+        int rowHeight = 0;
+        int available = width;
+        for (int i = 0; i < count; i++) {
+            CoolItem item = items[row][i];
+            rowHeight = Math.max(rowHeight, item.internalGetBounds().height);
+            available -= item.internalGetMinimumWidth();    
+        }
+        if (row > 0) y += rowSpacing;
+    
+        /* lay the items out */
+        for (int i = 0; i < count; i++) {
+            CoolItem child = items[row][i];
+            int newWidth = available + child.internalGetMinimumWidth();
+            if (i + 1 < count) {
+                newWidth = Math.min(newWidth, child.requestedWidth);
+                available -= (newWidth - child.internalGetMinimumWidth());
+            }
+            Rectangle oldBounds = child.internalGetBounds();
+            Rectangle newBounds = new Rectangle(x, y, newWidth, rowHeight);
+            if (!oldBounds.equals(newBounds)) {
+                child.setBounds(newBounds.x, newBounds.y, newBounds.width, newBounds.height);
+                Rectangle damage = new Rectangle(0, 0, 0, 0);
+                /* Cases are in descending order from most area to redraw to least. */
+                if (oldBounds.y !is newBounds.y) {
+                    damage = newBounds;
+                    damage.add(oldBounds);
+                    /* Redraw the row separator as well. */
+                    damage.y -= rowSpacing;
+                    damage.height += 2 * rowSpacing;
+                } else if (oldBounds.height !is newBounds.height) {
+                    /* 
+                     * Draw from the bottom of the gripper to the bottom of the new area.
+                     * (Bottom of the gripper is -3 from the bottom of the item).
+                     */
+                    damage.y = newBounds.y + Math.min(oldBounds.height, newBounds.height) - 3;
+                    damage.height = newBounds.y + newBounds.height + rowSpacing;
+                    damage.x = oldBounds.x - CoolItem.MARGIN_WIDTH;
+                    damage.width = oldBounds.width + CoolItem.MARGIN_WIDTH;
+                } else if (oldBounds.x !is newBounds.x) {
+                    /* Redraw only the difference between the separators. */
+                    damage.x = Math.min(oldBounds.x, newBounds.x);
+                    damage.width = Math.abs(oldBounds.x - newBounds.x) + CoolItem.MINIMUM_WIDTH;
+                    damage.y = oldBounds.y;
+                    damage.height = oldBounds.height;
+                }
+                internalRedraw(damage.x, damage.y, damage.width, damage.height);
+            }
+            x += newWidth;
+        }
+        y += rowHeight;
+    }
+    return y;
+}
+void relayout() {
+    Point size = getSize();
+    int height = layoutItems();
+    if ((style & DWT.VERTICAL) !is 0) {
+        Rectangle trim = computeTrim (0, 0, height, 0);
+        if (height !is size.x) super.setSize(trim.width, size.y);
+    } else {
+        Rectangle trim = computeTrim (0, 0, 0, height);
+        if (height !is size.y) super.setSize(size.x, trim.height);       
+    }
+}
+/**
+ * Returns an array of zero-relative ints that map
+ * the creation order of the receiver's items to the
+ * order in which they are currently being displayed.
+ * <p>
+ * Specifically, the indices of the returned array represent
+ * the current visual order of the items, and the contents
+ * of the array represent the creation order of the items.
+ * </p><p>
+ * Note: This is not the actual structure used by the receiver
+ * to maintain its list of items, so modifying the array will
+ * not affect the receiver. 
+ * </p>
+ *
+ * @return the current visual order of the receiver's items
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int[] getItemOrder () {
+    checkWidget ();
+    int count = getItemCount ();
+    int [] indices = new int [count];
+    count = 0;
+    for (int i = 0; i < items.length; i++) {
+        for (int j = 0; j < items[i].length; j++) {
+            CoolItem item = items[i][j];
+            int index = 0;
+            while (index<originalItems.length) {
+                if (originalItems [index] is item) break;
+                index++;    
+            }
+            if (index is originalItems.length) error (DWT.ERROR_CANNOT_GET_ITEM);
+            indices [count++] = index;
+        }
+    }
+    return indices;
+}
+void setItemOrder (int[] itemOrder) {
+    if (itemOrder is null) error(DWT.ERROR_NULL_ARGUMENT);
+    int count = originalItems.length;
+    if (itemOrder.length !is count) error(DWT.ERROR_INVALID_ARGUMENT);
+
+    /* Ensure that itemOrder does not contain any duplicates. */    
+    bool [] set = new bool [count];
+    for (int i = 0; i < set.length; i++) set [i] = false;
+    for (int i = 0; i < itemOrder.length; i++) {
+        if (itemOrder [i] < 0 || itemOrder [i] >= count) error (DWT.ERROR_INVALID_ARGUMENT);
+        if (set [itemOrder [i]]) error (DWT.ERROR_INVALID_ARGUMENT);
+        set [itemOrder [i]] = true;
+    }
+    
+    CoolItem[] row = new CoolItem[count];
+    for (int i = 0; i < count; i++) {
+        row[i] = originalItems[itemOrder[i]];
+    }
+    items = new CoolItem[1][count];
+    items[0] = row;
+}
+/**
+ * Returns an array of points whose x and y coordinates describe
+ * the widths and heights (respectively) of the items in the receiver
+ * in the order in which they are currently being displayed.
+ *
+ * @return the receiver's item sizes in their current visual order
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public Point[] getItemSizes () {
+    checkWidget();
+    CoolItem[] items = getItems();
+    Point[] sizes = new Point[items.length];
+    for (int i = 0; i < items.length; i++) {
+        sizes[i] = items[i].getSize();
+    }
+    return sizes;
+}
+void setItemSizes (Point[] sizes) {
+    if (sizes is null) error(DWT.ERROR_NULL_ARGUMENT);
+    CoolItem[] items = getItems();
+    if (sizes.length !is items.length) error(DWT.ERROR_INVALID_ARGUMENT);
+    for (int i = 0; i < items.length; i++) {
+        items[i].setSize(sizes[i]);
+    }
+}
+/**
+ * Returns whether or not the receiver is 'locked'. When a coolbar
+ * is locked, its items cannot be repositioned.
+ *
+ * @return true if the coolbar is locked, false otherwise
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ * 
+ * @since 2.0
+ */
+public bool getLocked () {
+    checkWidget ();
+    return isLocked;
+}
+int getWidth () {
+    if ((style & DWT.VERTICAL) !is 0) return getSize().y;
+    return getSize().x; 
+}
+/**
+ * Returns an array of ints that describe the zero-relative
+ * indices of any item(s) in the receiver that will begin on
+ * a new row. The 0th visible item always begins the first row,
+ * therefore it does not count as a wrap index.
+ *
+ * @return an array containing the receiver's wrap indices, or an empty array if all items are in one row
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int[] getWrapIndices () {
+    checkWidget();
+    if (items.length <= 1) return new int[]{};
+    int[] wrapIndices = new int[items.length - 1];
+    int i = 0, nextWrap = items[0].length;
+    for (int row = 1; row < items.length; row++) {
+        if (items[row][0].wrap) wrapIndices[i++] = nextWrap;
+        nextWrap += items[row].length;
+    }
+    if (i !is wrapIndices.length) {
+        int[] tmp = new int[i];
+        System.arraycopy(wrapIndices, 0, tmp, 0, i);
+        return tmp;
+    }
+    return wrapIndices;
+}
+/**
+ * Sets whether or not the receiver is 'locked'. When a coolbar
+ * is locked, its items cannot be repositioned.
+ *
+ * @param locked lock the coolbar if true, otherwise unlock the coolbar
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ * 
+ * @since 2.0
+ */
+public void setLocked (bool locked) {
+    checkWidget ();
+    if (isLocked !is locked) {
+        redraw();
+    }
+    isLocked = locked;
+    
+}
+/**
+ * Sets the indices of all item(s) in the receiver that will
+ * begin on a new row. The indices are given in the order in
+ * which they are currently being displayed. The 0th item
+ * always begins the first row, therefore it does not count
+ * as a wrap index. If indices is null or empty, the items
+ * will be placed on one line.
+ *
+ * @param indices an array of wrap indices, or null
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setWrapIndices (int[] indices) {
+    checkWidget();
+    if (indices is null) indices = new int[0];
+    int count = originalItems.length;
+    for (int i=0; i<indices.length; i++) {
+        if (indices[i] < 0 || indices[i] >= count) {
+            error (DWT.ERROR_INVALID_ARGUMENT);
+        }
+    }
+    for (int i=0; i<originalItems.length; i++) {
+        originalItems[i].wrap = false;
+    }
+    for (int i=0; i<indices.length; i++) {
+        int index = indices[i];
+        for (int row = 0; row < items.length; row++) {
+            if (items[row].length > index) {
+                items[row][index].wrap = true;
+                break;
+            } else {
+                index -= items[row].length;
+            }
+        }
+    }
+    relayout();
+}
+public void setCursor (Cursor cursor) {
+    checkWidget ();
+    super.setCursor (this.cursor = cursor);
+}
+/**
+ * Sets the receiver's item order, wrap indices, and item sizes
+ * all at once. This method is typically used to restore the
+ * displayed state of the receiver to a previously stored state.
+ * <p>
+ * The item order is the order in which the items in the receiver
+ * should be displayed, given in terms of the zero-relative ordering
+ * of when the items were added.
+ * </p><p>
+ * The wrap indices are the indices of all item(s) in the receiver
+ * that will begin on a new row. The indices are given in the order
+ * specified by the item order. The 0th item always begins the first
+ * row, therefore it does not count as a wrap index. If wrap indices
+ * is null or empty, the items will be placed on one line.
+ * </p><p>
+ * The sizes are specified in an array of points whose x and y
+ * coordinates describe the new widths and heights (respectively)
+ * of the receiver's items in the order specified by the item order.
+ * </p>
+ *
+ * @param itemOrder an array of indices that describe the new order to display the items in
+ * @param wrapIndices an array of wrap indices, or null
+ * @param sizes an array containing the new sizes for each of the receiver's items in visual order
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if item order or sizes is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if item order or sizes is not the same length as the number of items</li>
+ * </ul>
+ */
+public void setItemLayout (int[] itemOrder, int[] wrapIndices, Point[] sizes) {
+    checkWidget();
+    setItemOrder(itemOrder);
+    setWrapIndices(wrapIndices);
+    setItemSizes(sizes);    
+    relayout();
+}
+void wrapItems (int maxWidth) {
+    int itemCount = originalItems.length;
+    if (itemCount < 2) return;
+    CoolItem[] itemsVisual = new CoolItem[itemCount];
+    int start = 0;
+    for (int row = 0; row < items.length; row++) {
+        System.arraycopy(items[row], 0, itemsVisual, start, items[row].length);
+        start += items[row].length;
+    }
+    CoolItem[][] newItems = new CoolItem[itemCount][];
+    int rowCount = 0, rowWidth =  0;
+    start = 0;
+    for (int i = 0; i < itemCount; i++) {
+        CoolItem item = itemsVisual[i];
+        int itemWidth = item.internalGetMinimumWidth();
+        if ((i > 0 && item.wrap) || (maxWidth !is DWT.DEFAULT && rowWidth + itemWidth > maxWidth)) {
+            if (i is start) {
+                newItems[rowCount] = new CoolItem[1];
+                newItems[rowCount][0] = item;
+                start = i + 1;
+                rowWidth = 0;
+            } else {
+                int count = i - start;
+                newItems[rowCount] = new CoolItem[count];
+                System.arraycopy(itemsVisual, start, newItems[rowCount], 0, count);
+                start = i;
+                rowWidth = itemWidth;
+            }
+            rowCount++;         
+        } else {
+            rowWidth += itemWidth;
+        }
+    }
+    if (start < itemCount) {
+        int count = itemCount - start;
+        newItems[rowCount] = new CoolItem[count];
+        System.arraycopy(itemsVisual, start, newItems[rowCount], 0, count);
+        rowCount++;     
+    }
+    if (newItems.length !is rowCount) {
+        CoolItem[][] tmp = new CoolItem[rowCount][];
+        System.arraycopy(newItems, 0, tmp, 0, rowCount);
+        items = tmp;
+    } else {
+        items = newItems;
+    }
+}
+}