--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/widgets/ToolItem.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,852 @@
+/*******************************************************************************
+ * 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.ToolItem;
+
+import dwt.dwthelper.utils;
+
+
+import dwt.DWT;
+import dwt.DWTException;
+import dwt.events.SelectionEvent;
+import dwt.events.SelectionListener;
+import dwt.graphics.Image;
+import dwt.graphics.Point;
+import dwt.graphics.Rectangle;
+import dwt.internal.cocoa.NSBezierPath;
+import dwt.internal.cocoa.NSButton;
+import dwt.internal.cocoa.NSColor;
+import dwt.internal.cocoa.NSGraphicsContext;
+import dwt.internal.cocoa.NSPoint;
+import dwt.internal.cocoa.NSRect;
+import dwt.internal.cocoa.NSString;
+import dwt.internal.cocoa.NSView;
+import dwt.internal.cocoa.OS;
+import dwt.internal.cocoa.SWTBox;
+import dwt.internal.cocoa.SWTButton;
+import dwt.internal.cocoa.SWTView;
+
+/**
+ * Instances of this class represent a selectable user interface object
+ * that represents a button in a tool bar.
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>PUSH, CHECK, RADIO, SEPARATOR, DROP_DOWN</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>Selection</dd>
+ * </dl>
+ * <p>
+ * Note: Only one of the styles CHECK, PUSH, RADIO, SEPARATOR and DROP_DOWN 
+ * may be specified.
+ * </p><p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ * </p>
+ */
+public class ToolItem extends Item {
+    NSView view;
+    NSButton button, arrow;
+    int width = DEFAULT_SEPARATOR_WIDTH;
+    ToolBar parent;
+    Image hotImage, disabledImage;
+    String toolTipText;
+    Control control;
+    bool selection;
+
+    static final int DEFAULT_WIDTH = 24;
+    static final int DEFAULT_HEIGHT = 22;
+    static final int DEFAULT_SEPARATOR_WIDTH = 6;
+    static final int INSET = 5;
+    static final int ARROW_WIDTH = 5;
+    static final int ARROW_INSET = 2;
+
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>ToolBar</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#PUSH
+ * @see DWT#CHECK
+ * @see DWT#RADIO
+ * @see DWT#SEPARATOR
+ * @see DWT#DROP_DOWN
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public ToolItem (ToolBar parent, int style) {
+    super (parent, checkStyle (style));
+    this.parent = parent;
+    parent.createItem (this, parent.getItemCount ());
+}
+
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>ToolBar</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 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#PUSH
+ * @see DWT#CHECK
+ * @see DWT#RADIO
+ * @see DWT#SEPARATOR
+ * @see DWT#DROP_DOWN
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public ToolItem (ToolBar parent, int style, int index) {
+    super (parent, checkStyle (style));
+    this.parent = parent;
+    parent.createItem (this, index);
+}
+
+/**
+ * Adds the listener to the collection of listeners who 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>
+ * When <code>widgetSelected</code> is called when the mouse is over the arrow portion of a drop-down tool,
+ * the event object detail field contains the value <code>DWT.ARROW</code>.
+ * <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
+ */
+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);
+}
+
+static int checkStyle (int style) {
+    return checkBits (style, DWT.PUSH, DWT.CHECK, DWT.RADIO, DWT.SEPARATOR, DWT.DROP_DOWN, 0);
+}
+
+protected void checkSubclass () {
+    if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
+}
+
+Point computeSize () {
+    checkWidget();
+    int width = 0, height = 0;
+    if ((style & DWT.SEPARATOR) !is 0) {
+        if ((parent.style & DWT.HORIZONTAL) !is 0) {
+            width = getWidth ();
+            height = DEFAULT_HEIGHT;
+        } else {
+            width = DEFAULT_WIDTH;
+            height = getWidth ();
+        }
+        if (control !is null) {
+            height = Math.max (height, control.getMininumHeight ());
+        }
+    } else {
+        ((NSButton)button).sizeToFit ();
+        NSRect frame = button.frame();
+        width = (int)frame.width + INSET;
+        height = (int)frame.height;
+        if (arrow !is null) {
+            width += ARROW_INSET + ARROW_WIDTH;
+        }
+        view.setNeedsDisplay(true);
+    }
+    return new Point (width, height);
+}
+
+void createWidget() {
+    createJNIRef ();
+    if ((style & DWT.SEPARATOR) !is 0) {
+        SWTBox widget = (SWTBox)new SWTBox().alloc();
+        widget.initWithFrame(new NSRect());
+        widget.setBoxType(OS.NSBoxSeparator);
+        widget.setTag(jniRef);
+        view = widget;
+    } else {
+        SWTView widget = (SWTView)new SWTView().alloc();
+        widget.initWithFrame(new NSRect());
+        widget.setTag(parent.jniRef);
+        parent.contentView().addSubview_(widget);
+        button = (NSButton)new SWTButton().alloc();
+        button.initWithFrame(new NSRect());
+        button.setBordered(false);
+        button.setAction(OS.sel_sendSelection);
+        button.setTarget(button);
+        button.setTag(jniRef);
+        button.setImagePosition(OS.NSImageOverlaps);
+        button.setTitle(NSString.stringWith(""));
+        button.setEnabled(parent.getEnabled());
+        widget.addSubview_(button);
+        if ((style & DWT.DROP_DOWN) !is 0) {
+            arrow = (NSButton)new SWTButton().alloc();
+            arrow.initWithFrame(new NSRect());
+            arrow.setBordered(false);
+            arrow.setAction(OS.sel_sendArrowSelection);
+            arrow.setTarget(arrow);
+            arrow.setTag(jniRef);
+            arrow.setEnabled(parent.getEnabled());
+            widget.addSubview_(arrow);
+        }
+        view = widget;
+    }
+}
+void destroyWidget() {
+    parent.destroyItem(this);
+    super.destroyWidget();
+}
+
+void drawRect(int id, NSRect rect) {
+    super.drawRect(id, rect);
+    if (getSelection ()) {
+        NSRect bounds = view.bounds();
+        NSGraphicsContext context = NSGraphicsContext.currentContext();
+        context.saveGraphicsState();
+        NSColor.colorWithDeviceRed(0.1f, 0.1f, 0.1f, 0.1f).setFill();
+        NSColor.colorWithDeviceRed(0.2f, 0.2f, 0.2f, 0.2f).setStroke();
+        NSBezierPath.fillRect(bounds);
+        bounds.x += 0.5f;
+        bounds.y += 0.5f;
+        bounds.width -= 1;
+        bounds.height -= 1;
+        NSBezierPath.strokeRect(bounds);
+        context.restoreGraphicsState();
+    }
+    if (arrow !is null && id is arrow.id) {
+        NSRect frame = arrow.frame();
+        NSGraphicsContext context = NSGraphicsContext.currentContext();
+        context.saveGraphicsState();
+        NSPoint p1 = new NSPoint();
+        p1.y = (float)Math.ceil(frame.height / 2 - frame.width / 2);
+        NSPoint p2 = new NSPoint();
+        p2.x = frame.width;
+        p2.y = p1.y;
+        NSPoint p3 = new NSPoint();
+        p3.x = frame.width / 2;
+        p3.y = (float)(p2.y + Math.sqrt(Math.pow(frame.width, 2) - Math.pow(frame.width / 2, 2)));
+        NSBezierPath path = NSBezierPath.bezierPath();
+        path.moveToPoint(p1);
+        path.lineToPoint(p2);
+        path.lineToPoint(p3);
+        path.closePath();
+        NSColor color = isEnabled() ? NSColor.blackColor() : NSColor.disabledControlTextColor();
+        color.set();
+        path.fill();
+        context.restoreGraphicsState();
+    }
+}
+
+void enableWidget(bool enabled) {
+    if ((style & DWT.SEPARATOR) is 0) {
+        ((NSButton)button).setEnabled(enabled);
+        if (arrow !is null) {
+            ((NSButton)arrow).setEnabled(enabled);
+        }
+    }
+}
+
+/**
+ * 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();
+    NSRect rect = view.frame();
+    return new Rectangle((int)rect.x, (int)rect.y, (int)rect.width, (int)rect.height);
+}
+
+/**
+ * Returns the control that is used to fill the bounds of
+ * the item when the item is a <code>SEPARATOR</code>.
+ *
+ * @return the control
+ *
+ * @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 receiver's disabled image if it has one, or null
+ * if it does not.
+ * <p>
+ * The disabled image is displayed when the receiver is disabled.
+ * </p>
+ *
+ * @return the receiver's disabled image
+ *
+ * @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 Image getDisabledImage () {
+    checkWidget();
+    return disabledImage;
+}
+
+/**
+ * Returns <code>true</code> if the receiver is enabled, and
+ * <code>false</code> otherwise. A disabled control is typically
+ * not selectable from the user interface and draws with an
+ * inactive or "grayed" look.
+ *
+ * @return the receiver's enabled state
+ *
+ * @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 #isEnabled
+ */
+public bool getEnabled () {
+    checkWidget();
+    return (state & DISABLED) is 0;
+}
+
+/**
+ * Returns the receiver's hot image if it has one, or null
+ * if it does not.
+ * <p>
+ * The hot image is displayed when the mouse enters the receiver.
+ * </p>
+ *
+ * @return the receiver's hot image
+ *
+ * @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 Image getHotImage () {
+    checkWidget();
+    return hotImage;
+}
+
+/**
+ * Returns the receiver's parent, which must be a <code>ToolBar</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 ToolBar getParent () {
+    checkWidget();
+    return parent;
+}
+
+/**
+ * Returns <code>true</code> if the receiver is selected,
+ * and false otherwise.
+ * <p>
+ * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>,
+ * it is selected when it is checked (which some platforms draw as a
+ * pushed in button). If the receiver is of any other type, this method
+ * returns false.
+ * </p>
+ *
+ * @return the selection state
+ *
+ * @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 bool getSelection () {
+    checkWidget();
+    if ((style & (DWT.CHECK | DWT.RADIO)) is 0) return false;
+    return selection;
+}
+
+/**
+ * Returns the receiver's tool tip text, or null if it has not been set.
+ *
+ * @return the receiver's tool tip text
+ *
+ * @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 String getToolTipText () {
+    checkWidget();
+    return toolTipText;
+}
+
+/**
+ * Gets the width of the receiver.
+ *
+ * @return the width
+ *
+ * @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 getWidth () {
+    checkWidget();
+    return width;
+}
+
+/**
+ * Returns <code>true</code> if the receiver is enabled and all
+ * of the receiver's ancestors are enabled, and <code>false</code>
+ * otherwise. A disabled control is typically not selectable from the
+ * user interface and draws with an inactive or "grayed" look.
+ *
+ * @return the receiver's enabled state
+ *
+ * @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 #getEnabled
+ */
+public bool isEnabled () {
+    checkWidget();
+    return getEnabled () && parent.isEnabled ();
+}
+
+void releaseParent () {
+    super.releaseParent ();
+    setVisible (false);
+}
+
+void releaseHandle () {
+    super.releaseHandle ();
+    if (view !is null) {
+        OS.objc_msgSend(view.id, OS.sel_setTag_1, -1);
+        view.release();
+    }
+    if (button !is null) {
+        OS.objc_msgSend(button.id, OS.sel_setTag_1, -1);
+        button.release();
+    }
+    if (arrow !is null) {
+        OS.objc_msgSend(arrow.id, OS.sel_setTag_1, -1);
+        arrow.release();
+    }
+    view = button = arrow = null;
+    parent = null;
+}
+
+void releaseWidget () {
+    super.releaseWidget ();
+    control = null;
+    toolTipText = null;
+    image = disabledImage = hotImage = null; 
+}
+
+/**
+ * Removes the listener from the collection of listeners who 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
+ */
+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 selectRadio () {
+    int index = 0;
+    ToolItem [] items = parent.getItems ();
+    while (index < items.length && items [index] !is this) index++;
+    int i = index - 1;
+    while (i >= 0 && items [i].setRadioSelection (false)) --i;
+    int j = index + 1;
+    while (j < items.length && items [j].setRadioSelection (false)) j++;
+    setSelection (true);
+}
+
+void sendArrowSelection () {
+    NSRect frame = view.frame();
+    Event event = new Event ();
+    event.detail = DWT.ARROW;
+    event.x = (int)frame.x;
+    event.y = (int)(frame.y + arrow.frame().height);
+    postEvent (DWT.Selection, event);
+}
+
+void sendSelection () {
+    if ((style & DWT.RADIO) !is 0) {
+        if ((parent.getStyle () & DWT.NO_RADIO_GROUP) is 0) {
+            selectRadio ();
+        }
+    }
+    if ((style & DWT.CHECK) !is 0) setSelection (!getSelection ());
+    postEvent (DWT.Selection);
+}
+
+void setBounds (int x, int y, int width, int height) {
+    NSRect rect = new NSRect();
+    rect.x = x;
+    rect.y = y;
+    rect.width = width;
+    rect.height = height;
+    view.setFrame(rect);
+    if (arrow !is null) {
+        rect = button.frame();
+        NSRect arrowRect = new NSRect();
+        arrowRect.x = rect.width + ARROW_INSET;
+        arrowRect.width = ARROW_WIDTH;
+        arrowRect.height = rect.height;
+        arrow.setFrame(arrowRect);
+    }
+}
+
+/**
+ * Sets the control that is used to fill the bounds of
+ * the item when the item is a <code>SEPARATOR</code>.
+ *
+ * @param control the new control
+ *
+ * @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);
+    }
+    if ((style & DWT.SEPARATOR) is 0) return;
+    if (this.control is control) return;
+    this.control = control;
+    view.setHidden(control !is null);
+    if (control !is null && !control.isDisposed ()) {
+        control.moveAbove (null);
+    }
+    parent.relayout ();
+}
+
+/**
+ * Enables the receiver if the argument is <code>true</code>,
+ * and disables it otherwise.
+ * <p>
+ * A disabled control is typically
+ * not selectable from the user interface and draws with an
+ * inactive or "grayed" look.
+ * </p>
+ *
+ * @param enabled the new enabled state
+ *
+ * @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 setEnabled (bool enabled) {
+    checkWidget();
+    if ((state & DISABLED) is 0 && enabled) return;
+    if (enabled) {
+        state &= ~DISABLED;     
+    } else {
+        state |= DISABLED;
+    }
+    enableWidget(enabled);
+}
+
+/**
+ * Sets the receiver's disabled image to the argument, which may be
+ * null indicating that no disabled image should be displayed.
+ * <p>
+ * The disabled image is displayed when the receiver is disabled.
+ * </p>
+ *
+ * @param image the disabled image to display on the receiver (may be null)
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the image has been 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 void setDisabledImage (Image image) {
+    checkWidget();
+    if (image !is null && image.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT);
+    if ((style & DWT.SEPARATOR) !is 0) return;
+    disabledImage = image;
+    updateImage (true);
+}
+
+/**
+ * Sets the receiver's hot image to the argument, which may be
+ * null indicating that no hot image should be displayed.
+ * <p>
+ * The hot image is displayed when the mouse enters the receiver.
+ * </p>
+ *
+ * @param image the hot image to display on the receiver (may be null)
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the image has been 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 void setHotImage (Image image) {
+    checkWidget();
+    if (image !is null && image.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT);
+    if ((style & DWT.SEPARATOR) !is 0) return;
+    hotImage = image;
+    updateImage (true);
+}
+
+public void setImage (Image image) {
+    checkWidget();
+    if (image !is null && image.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT);
+    if ((style & DWT.SEPARATOR) !is 0) return;
+    super.setImage (image);
+    updateImage (true);
+}
+
+bool setRadioSelection (bool value) {
+    if ((style & DWT.RADIO) is 0) return false;
+    if (getSelection () !is value) {
+        setSelection (value);
+        postEvent (DWT.Selection);
+    }
+    return true;
+}
+
+/**
+ * Sets the selection state of the receiver.
+ * <p>
+ * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>,
+ * it is selected when it is checked (which some platforms draw as a
+ * pushed in button).
+ * </p>
+ *
+ * @param selected the new selection state
+ *
+ * @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 setSelection (bool selected) {
+    checkWidget();
+    if ((style & (DWT.CHECK | DWT.RADIO)) is 0) return;
+    this.selection = selected;
+    view.setNeedsDisplay(true);
+}
+
+/**
+ * Sets the receiver's text. The string may include
+ * the mnemonic character.
+ * </p>
+ * <p>
+ * Mnemonics are indicated by an '&amp;' that causes the next
+ * character to be the mnemonic.  When the user presses a
+ * key sequence that matches the mnemonic, a selection
+ * event occurs. On most platforms, the mnemonic appears
+ * underlined but may be emphasised in a platform specific
+ * manner.  The mnemonic indicator character '&amp;' can be
+ * escaped by doubling it in the string, causing a single
+ * '&amp;' to be displayed.
+ * </p>
+ * 
+ * @param string the new text
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the text 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 setText (String string) {
+    checkWidget();
+    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if ((style & DWT.SEPARATOR) !is 0) return;
+    super.setText (string);
+    NSString str = NSString.stringWith(string);
+    ((NSButton)button).setTitle(str);
+    parent.relayout ();
+    if (text.length() !is 0 && image !is null) {
+        if ((parent.style & DWT.RIGHT) !is 0) {
+            ((NSButton)button).setImagePosition(OS.NSImageLeft);
+        } else {
+            ((NSButton)button).setImagePosition(OS.NSImageAbove);       
+        }
+    } else {
+        ((NSButton)button).setImagePosition(OS.NSImageOverlaps);            
+    }
+}
+
+/**
+ * Sets the receiver's tool tip text to the argument, which
+ * may be null indicating that no tool tip text should be shown.
+ *
+ * @param string the new tool tip text (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 setToolTipText (String string) {
+    checkWidget();
+    toolTipText = string;
+    view.setToolTip(NSString.stringWith(string));
+}
+
+void setVisible (bool visible) {
+    if (visible) {
+        if ((state & HIDDEN) is 0) return;
+        state &= ~HIDDEN;
+    } else {
+        if ((state & HIDDEN) !is 0) return;
+        state |= HIDDEN;
+    }
+    view.setHidden(!visible);
+}
+
+/**
+ * Sets the width of the receiver, for <code>SEPARATOR</code> ToolItems.
+ *
+ * @param width the new width
+ *
+ * @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 setWidth (int width) {
+    checkWidget();
+    if ((style & DWT.SEPARATOR) is 0) return;
+    if (width < 0 || this.width is width) return;
+    this.width = width;
+    parent.relayout();
+}
+
+void updateImage (bool layout) {
+    if ((style & DWT.SEPARATOR) !is 0) return;
+    Image image = null;
+    if (hotImage !is null) {
+        image = hotImage;
+    } else {
+        if (this.image !is null) {
+            image = this.image;
+        } else {
+            image = disabledImage;
+        }
+    }
+    ((NSButton)button).setImage(image !is null ? image.handle : null);
+    if (text.length() !is 0 && image !is null) {
+        if ((parent.style & DWT.RIGHT) !is 0) {
+            ((NSButton)button).setImagePosition(OS.NSImageLeft);
+        } else {
+            ((NSButton)button).setImagePosition(OS.NSImageAbove);       
+        }
+    } else {
+        ((NSButton)button).setImagePosition(OS.NSImageOverlaps);            
+    }
+    parent.relayout();
+}
+
+}