bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/CoolItem.java - platform/eclipse.platform.swt - Git at Google

 package org.eclipse.swt.widgets;

 /*
  * (c) Copyright IBM Corp. 2000, 2001.
  * All Rights Reserved
  */

 import org.eclipse.swt.internal.win32.*;
 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.events.*;

 /**
  * 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>(none)</dd>
  * <dt><b>Events:</b></dt>
  * <dd>(none)</dd>
  * </dl>
  * <p>
  * IMPORTANT: This class is <em>not</em> intended to be subclassed.
  * </p>
  */

 public class CoolItem extends Item {
 	CoolBar parent;
 	Control control;
 	int id;

 /**
  * 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>SWT</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>SWT</code> style constants. The class description
  * for all SWT widget classes should include a comment which
  * describes the style constants which are applicable to the class.
  * </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 SWTException <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 SWT
  * @see Widget#checkSubclass
  * @see Widget#getStyle
  */
 public CoolItem (CoolBar parent, int style) {
 	super (parent, style);
 	this.parent = parent;
 	parent.createItem (this, parent.getItemCount ());
 }

 /**
  * 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>SWT</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>SWT</code> style constants. The class description
  * for all SWT widget classes should include a comment which
  * describes the style constants which are applicable to the class.
  * </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 index to store the receiver in its parent
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
  * </ul>
  * @exception SWTException <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 SWT
  * @see Widget#checkSubclass
  * @see Widget#getStyle
  */
 public CoolItem (CoolBar parent, int style, int index) {
 	super (parent, style);
 	this.parent = parent;
 	parent.createItem (this, index);
 }

 protected void checkSubclass () {
 	if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
 }

 /**
  * Returns the preferred size of the receiver.
  * <p>
  * The <em>prefered 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>SWT.DEFAULT</code> is passed for the hint.
  * </p>
  *
  * @param wHint the width hint (can be <code>SWT.DEFAULT</code>)
  * @param hHint the height hint (can be <code>SWT.DEFAULT</code>)
  * @return the preferred size
  *
  * @exception SWTException <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
  */
 public Point computeSize (int wHint, int hHint) {
 	checkWidget ();
 	int index = parent.indexOf (this);
 	if (index == -1) return new Point (0, 0);
 	int width = wHint, height = hHint;
 	if (wHint == SWT.DEFAULT) width = 32;
 	if (hHint == SWT.DEFAULT) height = 32;
 	int hwnd = parent.handle;
 	RECT rect = new RECT ();
 	OS.SendMessage (hwnd, OS.RB_GETBANDBORDERS, index, rect);
 	width += rect.left + rect.right;
 	return new Point (width, height);
 }

 /**
  * Returns a rectangle describing the receiver's size and location
  * relative to its parent.
  *
  * @return the receiver's bounding rectangle
  *
  * @exception SWTException <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 ();
 	int index = parent.indexOf (this);
 	if (index == -1) return new Rectangle (0, 0, 0, 0);
 	int hwnd = parent.handle;
 	RECT rect = new RECT ();
 	OS.SendMessage (hwnd, OS.RB_GETRECT, index, rect);
 	int width = rect.right - rect.left;
 	int height = rect.bottom - rect.top;
 	return new Rectangle (rect.left, rect.top, width, height);
 }

 /*
 * Not currently used.
 */
 Rectangle getClientArea () {
 	checkWidget ();
 	int index = parent.indexOf (this);
 	if (index == -1) return new Rectangle (0, 0, 0, 0);
 	int hwnd = parent.handle;
 	RECT insetRect = new RECT ();
 	OS.SendMessage (hwnd, OS.RB_GETBANDBORDERS, index, insetRect);
 	RECT rect = new RECT ();
 	OS.SendMessage (hwnd, OS.RB_GETRECT, index, rect);
 	int x = rect.left + insetRect.left;
 	int y = rect.top + insetRect.top;
 	int width = rect.right - rect.left - (insetRect.left + insetRect.right);
 	int height = rect.bottom - rect.top - (insetRect.top + insetRect.bottom);
 	if (index == 0) {
 		REBARBANDINFO rbBand = new REBARBANDINFO ();
 		rbBand.cbSize = REBARBANDINFO.sizeof;
 		rbBand.fMask = OS.RBBIM_HEADERSIZE;
 		OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
 		width = width - rbBand.cxHeader + 1;
 	}
 	return new Rectangle (x, y, width, height);
 }

 /**
  * Gets the control which is associated with the receiver.
  *
  * @return the control
  *
  * @exception SWTException <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;
 }

 public Display getDisplay () {
 	CoolBar parent = this.parent;
 	if (parent == null) error (SWT.ERROR_WIDGET_DISPOSED);
 	return parent.getDisplay ();
 }

 /**
  * Returns the receiver's parent, which must be a <code>CoolBar</code>.
  *
  * @return the receiver's parent
  *
  * @exception SWTException <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;
 }

 void releaseChild () {
 	super.releaseChild ();
 	parent.destroyItem (this);
 }

 void releaseWidget () {
 	super.releaseWidget ();
 	control = null;
 	parent = null;
 }

 /**
  * Sets the control which is associated with the receiver
  * to the argument.
  *
  * @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 SWTException <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 != null) {
 		if (control.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT);
 		if (control.parent != parent) error (SWT.ERROR_INVALID_PARENT);
 	}
 	int index = parent.indexOf (this);
 	if (index == -1) return;
 	Control newControl = control;
 	Control oldControl = this.control;
 	int hwnd = parent.handle;
 	int hwndChild = 0;
 	if (newControl != null) hwndChild = control.handle;
 	REBARBANDINFO rbBand = new REBARBANDINFO ();
 	rbBand.cbSize = REBARBANDINFO.sizeof;
 	rbBand.fMask = OS.RBBIM_CHILD;
 	rbBand.hwndChild = hwndChild;
 	this.control = newControl;

 	/*
 	* Feature in Windows.  When Windows sets the rebar band child,
 	* it makes the new child visible and hides the old child.  The
 	* fix is to save and restore the visibility of the controls.
 	*/
 	boolean hideNew = newControl != null && !newControl.getVisible ();
 	boolean showOld = oldControl != null && oldControl.getVisible ();
 	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
 	if (hideNew) newControl.setVisible (false);
 	if (showOld) oldControl.setVisible (true);
 }

 public Point getPreferredSize () {
 	checkWidget ();
 	int index = parent.indexOf (this);
 	if (index == -1) return new Point (0, 0);
 	int hwnd = parent.handle;
 	REBARBANDINFO rbBand = new REBARBANDINFO ();
 	rbBand.cbSize = REBARBANDINFO.sizeof;
 	rbBand.fMask = OS.RBBIM_CHILDSIZE | OS.RBBIM_IDEALSIZE;
 	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
 	RECT rect = new RECT ();
 	OS.SendMessage (hwnd, OS.RB_GETBANDBORDERS, index, rect);
 	int width = rbBand.cxIdeal + rect.left + rect.right;
 	return new Point (width, rbBand.cyMinChild);
 }

 public void setPreferredSize (int width, int height) {
 	checkWidget ();
 	int index = parent.indexOf (this);
 	if (index == -1) return;
 	int hwnd = parent.handle;
 	RECT rect = new RECT ();
 	OS.SendMessage (hwnd, OS.RB_GETBANDBORDERS, index, rect);
 	REBARBANDINFO rbBand = new REBARBANDINFO ();
 	rbBand.cbSize = REBARBANDINFO.sizeof;
 	rbBand.fMask = OS.RBBIM_CHILDSIZE | OS.RBBIM_IDEALSIZE;
 	rbBand.cxIdeal = width - rect.left - rect.right;
 	rbBand.cyMinChild = rbBand.cyMaxChild = height;
 	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
 }

 public void setPreferredSize (Point size) {
 	checkWidget ();
 	if (size == null) error(SWT.ERROR_NULL_ARGUMENT);
 	setPreferredSize (size.x, size.y);
 }

 public Point getSize() {
 	checkWidget ();
 	int index = parent.indexOf (this);
 	if (index == -1) new Point (0, 0);
 	int hwnd = parent.handle;
 	RECT rect = new RECT ();
 	OS.SendMessage (hwnd, OS.RB_GETRECT, index, rect);
 	int width = rect.right - rect.left;
 	int height = rect.bottom - rect.top;
 	return new Point (width, height);
 }

 public void setSize (int width, int height) {
 	checkWidget ();
 	int index = parent.indexOf (this);
 	if (index == -1) return;
 	int hwnd = parent.handle;
 	RECT rect = new RECT ();
 	OS.SendMessage (hwnd, OS.RB_GETBANDBORDERS, index, rect);
 	REBARBANDINFO rbBand = new REBARBANDINFO ();
 	rbBand.cbSize = REBARBANDINFO.sizeof;
 	rbBand.fMask = OS.RBBIM_CHILDSIZE | OS.RBBIM_SIZE | OS.RBBIM_IDEALSIZE;
 	rbBand.cx = width;
 	rbBand.cxIdeal = width - rect.left - rect.right;
 	rbBand.cyChild = rbBand.cyMinChild = rbBand.cyMaxChild = height;
 	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
 }

 public void setSize (Point size) {
 	if (size == null) error(SWT.ERROR_NULL_ARGUMENT);
 	setSize (size.x, size.y);
 }

 boolean getWrap() {
 	int index = parent.indexOf (this);
 	int hwnd = parent.handle;
 	REBARBANDINFO rbBand = new REBARBANDINFO ();
 	rbBand.cbSize = REBARBANDINFO.sizeof;
 	rbBand.fMask = OS.RBBIM_STYLE;
 	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
 	return (rbBand.fStyle & OS.RBBS_BREAK) != 0;
 }

 void setWrap(boolean wrap) {
 	int index = parent.indexOf (this);
 	int hwnd = parent.handle;
 	REBARBANDINFO rbBand = new REBARBANDINFO ();
 	rbBand.cbSize = REBARBANDINFO.sizeof;
 	rbBand.fMask = OS.RBBIM_STYLE;
 	if (wrap) {
 		rbBand.fStyle = OS.RBBS_VARIABLEHEIGHT | OS.RBBS_GRIPPERALWAYS | OS.RBBS_BREAK;
 	} else {
 		rbBand.fStyle = OS.RBBS_VARIABLEHEIGHT | OS.RBBS_GRIPPERALWAYS;
 	}
 	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
 }

 }
	package org.eclipse.swt.widgets;

	/*
	* (c) Copyright IBM Corp. 2000, 2001.
	* All Rights Reserved
	*/

	import org.eclipse.swt.internal.win32.*;
	import org.eclipse.swt.*;
	import org.eclipse.swt.graphics.*;
	import org.eclipse.swt.events.*;

	/**
	* 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>(none)</dd>
	* <dt><b>Events:</b></dt>
	* <dd>(none)</dd>
	* </dl>
	* <p>
	* IMPORTANT: This class is <em>not</em> intended to be subclassed.
	* </p>
	*/

	public class CoolItem extends Item {
	CoolBar parent;
	Control control;
	int id;

	/**
	* 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>SWT</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>SWT</code> style constants. The class description
	* for all SWT widget classes should include a comment which
	* describes the style constants which are applicable to the class.
	* </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 SWTException <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 SWT
	* @see Widget#checkSubclass
	* @see Widget#getStyle
	*/
	public CoolItem (CoolBar parent, int style) {
	super (parent, style);
	this.parent = parent;
	parent.createItem (this, parent.getItemCount ());
	}

	/**
	* 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>SWT</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>SWT</code> style constants. The class description
	* for all SWT widget classes should include a comment which
	* describes the style constants which are applicable to the class.
	* </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 index to store the receiver in its parent
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
	* </ul>
	* @exception SWTException <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 SWT
	* @see Widget#checkSubclass
	* @see Widget#getStyle
	*/
	public CoolItem (CoolBar parent, int style, int index) {
	super (parent, style);
	this.parent = parent;
	parent.createItem (this, index);
	}

	protected void checkSubclass () {
	if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
	}

	/**
	* Returns the preferred size of the receiver.
	* <p>
	* The <em>prefered 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>SWT.DEFAULT</code> is passed for the hint.
	* </p>
	*
	* @param wHint the width hint (can be <code>SWT.DEFAULT</code>)
	* @param hHint the height hint (can be <code>SWT.DEFAULT</code>)
	* @return the preferred size
	*
	* @exception SWTException <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
	*/
	public Point computeSize (int wHint, int hHint) {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) return new Point (0, 0);
	int width = wHint, height = hHint;
	if (wHint == SWT.DEFAULT) width = 32;
	if (hHint == SWT.DEFAULT) height = 32;
	int hwnd = parent.handle;
	RECT rect = new RECT ();
	OS.SendMessage (hwnd, OS.RB_GETBANDBORDERS, index, rect);
	width += rect.left + rect.right;
	return new Point (width, height);
	}

	/**
	* Returns a rectangle describing the receiver's size and location
	* relative to its parent.
	*
	* @return the receiver's bounding rectangle
	*
	* @exception SWTException <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 ();
	int index = parent.indexOf (this);
	if (index == -1) return new Rectangle (0, 0, 0, 0);
	int hwnd = parent.handle;
	RECT rect = new RECT ();
	OS.SendMessage (hwnd, OS.RB_GETRECT, index, rect);
	int width = rect.right - rect.left;
	int height = rect.bottom - rect.top;
	return new Rectangle (rect.left, rect.top, width, height);
	}

	/*
	* Not currently used.
	*/
	Rectangle getClientArea () {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) return new Rectangle (0, 0, 0, 0);
	int hwnd = parent.handle;
	RECT insetRect = new RECT ();
	OS.SendMessage (hwnd, OS.RB_GETBANDBORDERS, index, insetRect);
	RECT rect = new RECT ();
	OS.SendMessage (hwnd, OS.RB_GETRECT, index, rect);
	int x = rect.left + insetRect.left;
	int y = rect.top + insetRect.top;
	int width = rect.right - rect.left - (insetRect.left + insetRect.right);
	int height = rect.bottom - rect.top - (insetRect.top + insetRect.bottom);
	if (index == 0) {
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_HEADERSIZE;
	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
	width = width - rbBand.cxHeader + 1;
	}
	return new Rectangle (x, y, width, height);
	}

	/**
	* Gets the control which is associated with the receiver.
	*
	* @return the control
	*
	* @exception SWTException <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;
	}

	public Display getDisplay () {
	CoolBar parent = this.parent;
	if (parent == null) error (SWT.ERROR_WIDGET_DISPOSED);
	return parent.getDisplay ();
	}

	/**
	* Returns the receiver's parent, which must be a <code>CoolBar</code>.
	*
	* @return the receiver's parent
	*
	* @exception SWTException <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;
	}

	void releaseChild () {
	super.releaseChild ();
	parent.destroyItem (this);
	}

	void releaseWidget () {
	super.releaseWidget ();
	control = null;
	parent = null;
	}

	/**
	* Sets the control which is associated with the receiver
	* to the argument.
	*
	* @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 SWTException <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 != null) {
	if (control.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT);
	if (control.parent != parent) error (SWT.ERROR_INVALID_PARENT);
	}
	int index = parent.indexOf (this);
	if (index == -1) return;
	Control newControl = control;
	Control oldControl = this.control;
	int hwnd = parent.handle;
	int hwndChild = 0;
	if (newControl != null) hwndChild = control.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_CHILD;
	rbBand.hwndChild = hwndChild;
	this.control = newControl;

	/*
	* Feature in Windows. When Windows sets the rebar band child,
	* it makes the new child visible and hides the old child. The
	* fix is to save and restore the visibility of the controls.
	*/
	boolean hideNew = newControl != null && !newControl.getVisible ();
	boolean showOld = oldControl != null && oldControl.getVisible ();
	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
	if (hideNew) newControl.setVisible (false);
	if (showOld) oldControl.setVisible (true);
	}

	public Point getPreferredSize () {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) return new Point (0, 0);
	int hwnd = parent.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_CHILDSIZE \| OS.RBBIM_IDEALSIZE;
	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
	RECT rect = new RECT ();
	OS.SendMessage (hwnd, OS.RB_GETBANDBORDERS, index, rect);
	int width = rbBand.cxIdeal + rect.left + rect.right;
	return new Point (width, rbBand.cyMinChild);
	}

	public void setPreferredSize (int width, int height) {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) return;
	int hwnd = parent.handle;
	RECT rect = new RECT ();
	OS.SendMessage (hwnd, OS.RB_GETBANDBORDERS, index, rect);
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_CHILDSIZE \| OS.RBBIM_IDEALSIZE;
	rbBand.cxIdeal = width - rect.left - rect.right;
	rbBand.cyMinChild = rbBand.cyMaxChild = height;
	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
	}

	public void setPreferredSize (Point size) {
	checkWidget ();
	if (size == null) error(SWT.ERROR_NULL_ARGUMENT);
	setPreferredSize (size.x, size.y);
	}

	public Point getSize() {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) new Point (0, 0);
	int hwnd = parent.handle;
	RECT rect = new RECT ();
	OS.SendMessage (hwnd, OS.RB_GETRECT, index, rect);
	int width = rect.right - rect.left;
	int height = rect.bottom - rect.top;
	return new Point (width, height);
	}

	public void setSize (int width, int height) {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) return;
	int hwnd = parent.handle;
	RECT rect = new RECT ();
	OS.SendMessage (hwnd, OS.RB_GETBANDBORDERS, index, rect);
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_CHILDSIZE \| OS.RBBIM_SIZE \| OS.RBBIM_IDEALSIZE;
	rbBand.cx = width;
	rbBand.cxIdeal = width - rect.left - rect.right;
	rbBand.cyChild = rbBand.cyMinChild = rbBand.cyMaxChild = height;
	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
	}

	public void setSize (Point size) {
	if (size == null) error(SWT.ERROR_NULL_ARGUMENT);
	setSize (size.x, size.y);
	}

	boolean getWrap() {
	int index = parent.indexOf (this);
	int hwnd = parent.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_STYLE;
	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
	return (rbBand.fStyle & OS.RBBS_BREAK) != 0;
	}

	void setWrap(boolean wrap) {
	int index = parent.indexOf (this);
	int hwnd = parent.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_STYLE;
	if (wrap) {
	rbBand.fStyle = OS.RBBS_VARIABLEHEIGHT \| OS.RBBS_GRIPPERALWAYS \| OS.RBBS_BREAK;
	} else {
	rbBand.fStyle = OS.RBBS_VARIABLEHEIGHT \| OS.RBBS_GRIPPERALWAYS;
	}
	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
	}

	}