--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/widgets/CoolItem.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,661 @@
+/*******************************************************************************
+ * 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
+ *******************************************************************************/
+module dwt.widgets.CoolItem;
+
+import dwt.dwthelper.utils;
+
+
+import dwt.DWT;
+import dwt.DWTException;
+import dwt.events.SelectionEvent;
+import dwt.events.SelectionListener;
+import dwt.graphics.Color;
+import dwt.graphics.GC;
+import dwt.graphics.Image;
+import dwt.graphics.ImageData;
+import dwt.graphics.PaletteData;
+import dwt.graphics.Point;
+import dwt.graphics.RGB;
+import dwt.graphics.Rectangle;
+ 
+/**
+ * Instances of this class are selectable user interface
+ * objects that represent the dynamically positionable
+ * areas of a <code>CoolBar</code>.
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>DROP_DOWN</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>Selection</dd>
+ * </dl>
+ * <p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ * </p>
+ */
+public class CoolItem extends Item {
+    Control control;
+    CoolBar parent;
+    bool ideal;
+    int preferredWidth, preferredHeight, minimumWidth, minimumHeight, requestedWidth;
+    Rectangle itemBounds = new Rectangle(0, 0, 0, 0);
+    
+    static final int MARGIN_WIDTH = 4;
+    static final int GRABBER_WIDTH = 2;
+    static final int MINIMUM_WIDTH = (2 * MARGIN_WIDTH) + GRABBER_WIDTH;
+    
+    private int CHEVRON_HORIZONTAL_TRIM = -1;           //platform dependent values
+    private int CHEVRON_VERTICAL_TRIM = -1; 
+    private static final int CHEVRON_LEFT_MARGIN = 2;
+    private static final int CHEVRON_IMAGE_WIDTH = 8;   //Width to draw the double arrow
+    
+    ToolBar chevron;
+    bool wrap;
+    Image arrowImage = null;
+    
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>CoolBar</code>) and a style value
+ * describing its behavior and appearance. The item is added
+ * to the end of the items maintained by its parent.
+ * <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#DROP_DOWN
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public CoolItem (CoolBar parent, int style) {
+    super(parent, style);
+    this.parent = parent;
+    parent.createItem (this, parent.getItemCount());
+    calculateChevronTrim ();
+}
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>CoolBar</code>), a style value
+ * describing its behavior and appearance, and the index
+ * at which to place it in the items maintained by its parent.
+ * <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
+ * @param index the zero-relative index at which to store the receiver in its parent
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
+ *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</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#DROP_DOWN
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public CoolItem (CoolBar parent, int style, int index) {
+    super(parent, style);
+    this.parent = parent;
+    parent.createItem (this, index);
+    calculateChevronTrim ();
+}
+/**
+ * Adds the listener to the collection of listeners that will
+ * be notified when the control is selected by the user, by sending it one
+ * of the messages defined in the <code>SelectionListener</code>
+ * interface.
+ * <p>
+ * If <code>widgetSelected</code> is called when the mouse is over
+ * the drop-down arrow (or 'chevron') portion of the cool item,
+ * the event object detail field contains the value <code>DWT.ARROW</code>,
+ * and the x and y fields in the event object represent the point at
+ * the bottom left of the chevron, where the menu should be popped up.
+ * <code>widgetDefaultSelected</code> is not called.
+ * </p>
+ *
+ * @param listener the listener which should be notified when the control is selected by the user
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</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>
+ *
+ * @see SelectionListener
+ * @see #removeSelectionListener
+ * @see SelectionEvent
+ * 
+ * @since 2.0
+ */
+public void addSelectionListener(SelectionListener listener) {
+    checkWidget();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    TypedListener typedListener = new TypedListener (listener);
+    addListener (DWT.Selection,typedListener);
+    addListener (DWT.DefaultSelection,typedListener);
+}
+protected void checkSubclass () {
+    if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
+}
+/* 
+ * Find the trim size of the Toolbar widget in the current platform.
+ */
+void calculateChevronTrim () {
+    ToolBar tb = new ToolBar (parent, DWT.FLAT);
+    ToolItem ti = new ToolItem (tb, DWT.PUSH);
+    Image image = new Image (display, 1, 1);
+    ti.setImage (image);
+    Point size = tb.computeSize (DWT.DEFAULT, DWT.DEFAULT);
+    size = parent.fixPoint(size.x, size.y);
+    CHEVRON_HORIZONTAL_TRIM = size.x - 1;
+    CHEVRON_VERTICAL_TRIM = size.y - 1;
+    tb.dispose ();
+    ti.dispose ();
+    image.dispose ();
+}
+/**
+ * Returns the preferred size of the receiver.
+ * <p>
+ * The <em>preferred size</em> of a <code>CoolItem</code> is the size that
+ * it would best be displayed at. The width hint and height hint arguments
+ * allow the caller to ask the instance questions such as "Given a particular
+ * width, how high does it need to be to show all of the contents?"
+ * To indicate that the caller does not wish to constrain a particular 
+ * dimension, the constant <code>DWT.DEFAULT</code> is passed for the hint. 
+ * </p>
+ *
+ * @param wHint the width hint (can be <code>DWT.DEFAULT</code>)
+ * @param hHint the height hint (can be <code>DWT.DEFAULT</code>)
+ * @return the preferred size
+ *
+ * @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>
+ *
+ * @see Layout
+ * @see #getBounds
+ * @see #getSize
+ * @see Control#getBorderWidth
+ * @see Scrollable#computeTrim
+ * @see Scrollable#getClientArea
+ */
+public Point computeSize (int wHint, int hHint) {
+    checkWidget();
+    int width = wHint, height = hHint;
+    if (wHint is DWT.DEFAULT) width = 32;
+    if (hHint is DWT.DEFAULT) height = 32;
+    if ((parent.style & DWT.VERTICAL) !is 0) {
+        height += MINIMUM_WIDTH;
+    } else {
+        width += MINIMUM_WIDTH;
+    }   
+    return new Point (width, height);
+}
+public void dispose () {
+    if (isDisposed()) return;
+    
+    /*
+     * Must call parent.destroyItem() before super.dispose(), since it needs to
+     * query the bounds to properly remove the item.
+     */
+    parent.destroyItem(this);
+    super.dispose ();
+    parent = null;
+    control = null;
+    
+    /* 
+     * Although the parent for the chevron is the CoolBar (CoolItem can not be the parent)
+     * it has to be disposed with the item 
+     */
+    if (chevron !is null && !chevron.isDisposed()) chevron.dispose();
+    chevron = null;
+    if (arrowImage !is null && !arrowImage.isDisposed()) arrowImage.dispose();
+    arrowImage = null;
+}
+
+Image createArrowImage (int width, int height) {
+    Point point = parent.fixPoint(width, height);
+    width = point.x;
+    height = point.y;
+    Color foreground = parent.getForeground ();
+    Color black = display.getSystemColor (DWT.COLOR_BLACK);
+    Color background = parent.getBackground ();
+    
+    PaletteData palette = new PaletteData (new RGB[]{foreground.getRGB(), background.getRGB(), black.getRGB()});
+    ImageData imageData = new ImageData (width, height, 4, palette);
+    imageData.transparentPixel = 1;
+    Image image = new Image (display, imageData);
+        
+    GC gc = new GC (image, parent.getStyle() & DWT.RIGHT_TO_LEFT);
+    gc.setBackground (background);
+    gc.fillRectangle (0, 0, width, height);
+    gc.setForeground (black);
+    
+    int startX = 0 ;
+    if ((parent.style & DWT.VERTICAL) !is 0) {
+        startX = width - CHEVRON_IMAGE_WIDTH;
+    }
+    int startY = height / 6; 
+    int step = 2;   
+    gc.drawLine (startX, startY, startX + step, startY + step);
+    gc.drawLine (startX, startY + (2 * step), startX + step, startY + step);
+    startX++;
+    gc.drawLine (startX, startY, startX + step, startY + step);
+    gc.drawLine (startX, startY + (2 * step), startX + step, startY + step);
+    startX += 3;
+    gc.drawLine (startX, startY, startX + step, startY + step);
+    gc.drawLine (startX, startY + (2 * step), startX + step, startY + step);
+    startX++;
+    gc.drawLine (startX, startY, startX + step, startY + step);
+    gc.drawLine (startX, startY + (2 * step), startX + step, startY + step);
+    gc.dispose ();
+    return image;
+}
+/**
+ * Returns a rectangle describing the receiver's size and location
+ * relative to its parent.
+ *
+ * @return the receiver's bounding rectangle
+ *
+ * @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 Rectangle getBounds () {
+    checkWidget();
+    return parent.fixRectangle(itemBounds.x, itemBounds.y, itemBounds.width, itemBounds.height);
+}
+Rectangle internalGetBounds () {
+    return new Rectangle(itemBounds.x, itemBounds.y, itemBounds.width, itemBounds.height);
+}
+/**
+ * Returns the control that is associated with the receiver.
+ *
+ * @return the control that is contained by the receiver
+ *
+ * @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 Control getControl () {
+    checkWidget();
+    return control;
+}
+/**
+ * Returns the minimum size that the cool item can
+ * be resized to using the cool item's gripper.
+ * 
+ * @return a point containing the minimum width and height of the cool item, in pixels
+ * 
+ * @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 Point getMinimumSize () {
+    checkWidget();
+    return parent.fixPoint(minimumWidth, minimumHeight);
+}
+/**
+ * Returns the receiver's parent, which must be a <code>CoolBar</code>.
+ *
+ * @return the receiver's parent
+ *
+ * @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 CoolBar getParent () {
+    checkWidget();
+    return parent;
+}
+/**
+ * Returns a point describing the receiver's ideal size.
+ * The x coordinate of the result is the ideal width of the receiver.
+ * The y coordinate of the result is the ideal height of the receiver.
+ *
+ * @return the receiver's ideal size
+ *
+ * @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 getPreferredSize () {
+    checkWidget();
+    return parent.fixPoint(preferredWidth, preferredHeight);
+}
+/**
+ * Returns a point describing the receiver's size. The
+ * x coordinate of the result is the width of the receiver.
+ * The y coordinate of the result is the height of the
+ * receiver.
+ *
+ * @return the receiver's size
+ *
+ * @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 getSize () {
+    checkWidget();
+    return parent.fixPoint(itemBounds.width, itemBounds.height);
+}
+int internalGetMinimumWidth () {
+    int width = minimumWidth + MINIMUM_WIDTH;
+    if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) {
+        width += CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN;
+    }
+    return width;
+}
+/*
+ *  Called when the chevron is selected.
+ */
+void onSelection (Event ev) {
+    Rectangle bounds = chevron.getBounds();
+    Event event = new Event();
+    event.detail = DWT.ARROW;
+    if ((parent.style & DWT.VERTICAL) !is 0) {
+        event.x = bounds.x + bounds.width;
+        event.y = bounds.y;
+    } else {
+        event.x = bounds.x;
+        event.y = bounds.y + bounds.height;
+    }
+    postEvent (DWT.Selection, event);
+}
+/**
+ * Removes the listener from the collection of listeners that
+ * will be notified when the control is selected by the user.
+ *
+ * @param listener the listener which should no longer be notified
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</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>
+ *
+ * @see SelectionListener
+ * @see #addSelectionListener
+ * 
+ * @since 2.0
+ */
+public void removeSelectionListener(SelectionListener listener) {
+    checkWidget();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) return;
+    eventTable.unhook (DWT.Selection, listener);
+    eventTable.unhook (DWT.DefaultSelection,listener);  
+}
+void setBounds (int x, int y, int width, int height) {
+    itemBounds.x = x;
+    itemBounds.y = y;
+    itemBounds.width = width;
+    itemBounds.height = height;
+    if (control !is null) {
+        int controlWidth = width - MINIMUM_WIDTH;
+        if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) {
+            controlWidth -= CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN;
+        }
+        control.setBounds (parent.fixRectangle(x + MINIMUM_WIDTH,   y, controlWidth, height));
+    }
+    updateChevron();
+}
+/**
+ * Sets the control that is associated with the receiver
+ * to the argument.
+ *
+ * @param control the new control that will be contained by the receiver
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li> 
+ *    <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</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 void setControl (Control control) {
+    checkWidget();
+    if (control !is null) {
+        if (control.isDisposed()) error (DWT.ERROR_INVALID_ARGUMENT);
+        if (control.parent !is parent) error (DWT.ERROR_INVALID_PARENT);
+    }
+    this.control = control;
+    if (control !is null) {
+        int controlWidth = itemBounds.width - MINIMUM_WIDTH;
+        if ((style & DWT.DROP_DOWN) !is 0 && itemBounds.width < preferredWidth) {
+            controlWidth -= CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN;
+        }
+        control.setBounds (parent.fixRectangle(itemBounds.x + MINIMUM_WIDTH, itemBounds.y, controlWidth, itemBounds.height));
+    }
+}
+/**
+ * Sets the minimum size that the cool item can be resized to
+ * using the cool item's gripper, to the point specified by the arguments.
+ * 
+ * @param width the minimum width of the cool item, in pixels
+ * @param height the minimum height of the cool item, in pixels
+ * 
+ * @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 setMinimumSize (int width, int height) {
+    checkWidget ();
+    Point point = parent.fixPoint(width, height);
+    minimumWidth = point.x;
+    minimumHeight = point.y;
+}
+/**
+ * Sets the minimum size that the cool item can be resized to
+ * using the cool item's gripper, to the point specified by the argument.
+ * 
+ * @param size a point representing the minimum width and height of the cool item, in pixels
+ * 
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the point is null</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>
+ * 
+ * @since 2.0
+ */
+public void setMinimumSize (Point size) {
+    checkWidget ();
+    if (size is null) error(DWT.ERROR_NULL_ARGUMENT);
+    setMinimumSize(size.x, size.y);
+}
+/**
+ * Sets the receiver's ideal size to the point specified by the arguments.
+ *
+ * @param width the new ideal width for the receiver
+ * @param height the new ideal height for the receiver
+ *
+ * @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 setPreferredSize (int width, int height) {
+    checkWidget();
+    ideal = true;
+    Point point = parent.fixPoint(width, height);
+    preferredWidth = Math.max (point.x, MINIMUM_WIDTH);
+    preferredHeight = point.y;
+}
+/**
+ * Sets the receiver's ideal size to the point specified by the argument.
+ *
+ * @param size the new ideal size for the receiver
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the point is null</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 void setPreferredSize (Point size) {
+    checkWidget();
+    if (size is null) error(DWT.ERROR_NULL_ARGUMENT);
+    setPreferredSize(size.x, size.y);
+}
+/**
+ * Sets the receiver's size to the point specified by the arguments.
+ * <p>
+ * Note: Attempting to set the width or height of the
+ * receiver to a negative number will cause that
+ * value to be set to zero instead.
+ * </p>
+ *
+ * @param width the new width for the receiver
+ * @param height the new height for the receiver
+ *
+ * @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 setSize (int width, int height) {
+    checkWidget();
+    Point point = parent.fixPoint(width, height);
+    width = Math.max(point.x, minimumWidth + MINIMUM_WIDTH);
+    height = point.y;
+    if (!ideal) {
+        preferredWidth = width;
+        preferredHeight = height;
+    }
+    itemBounds.width = requestedWidth = width;
+    itemBounds.height = height;
+    if (control !is null) {
+        int controlWidth = width - MINIMUM_WIDTH;
+        if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) {
+            controlWidth -= CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN;
+        }
+        control.setSize(parent.fixPoint(controlWidth, height));
+    }
+    parent.relayout();
+    updateChevron();
+}
+/**
+ * Sets the receiver's size to the point specified by the argument.
+ * <p>
+ * Note: Attempting to set the width or height of the
+ * receiver to a negative number will cause them to be
+ * set to zero instead.
+ * </p>
+ *
+ * @param size the new size for the receiver
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the point is null</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 void setSize (Point size) {
+    checkWidget();
+    if (size is null) error (DWT.ERROR_NULL_ARGUMENT);
+    setSize (size.x, size.y);
+}
+void updateChevron() {
+    if (control !is null) {
+        int width = itemBounds.width;
+        if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) {
+            if (chevron is null) {
+                chevron = new ToolBar (parent, DWT.FLAT | DWT.NO_FOCUS);
+                ToolItem toolItem = new ToolItem (chevron, DWT.PUSH);
+                toolItem.addListener (DWT.Selection, new Listener() {
+                    public void handleEvent (Event event) {
+                        CoolItem.this.onSelection (event);
+                    }
+                });
+            }
+            int controlHeight, currentImageHeight = 0;
+            if ((parent.style & DWT.VERTICAL) !is 0) {
+                controlHeight = control.getSize ().x;
+                if (arrowImage !is null) currentImageHeight = arrowImage.getBounds().width;
+            } else {
+                controlHeight = control.getSize ().y;
+                if (arrowImage !is null) currentImageHeight = arrowImage.getBounds().height;
+            }           
+            int height = Math.min (controlHeight, itemBounds.height);
+            int imageHeight = Math.max(1, height - CHEVRON_VERTICAL_TRIM);          
+            if (currentImageHeight !is imageHeight) {
+                Image image = createArrowImage (CHEVRON_IMAGE_WIDTH, imageHeight);
+                chevron.getItem (0).setImage (image);
+                if (arrowImage !is null) arrowImage.dispose ();
+                arrowImage = image;
+            }
+            chevron.setBackground (parent.getBackground());
+            chevron.setBounds (parent.fixRectangle (
+                itemBounds.x + width - CHEVRON_LEFT_MARGIN - CHEVRON_IMAGE_WIDTH - CHEVRON_HORIZONTAL_TRIM,
+                itemBounds.y,
+                CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM,
+                height));
+            chevron.setVisible(true);
+        } else {
+            if (chevron !is null) {
+                chevron.setVisible(false);
+            }
+        }
+    }
+}
+}