bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/layout/RowLayout.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2008 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.layout;

 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.widgets.*;

 /**
  * Instances of this class determine the size and position of the
  * children of a <code>Composite</code> by placing them either in
  * horizontal rows or vertical columns within the parent <code>Composite</code>.
  * <p>
  * <code>RowLayout</code> aligns all controls in one row if the
  * <code>type</code> is set to horizontal, and one column if it is
  * set to vertical. It has the ability to wrap, and provides configurable
  * margins and spacing. <code>RowLayout</code> has a number of configuration
  * fields. In addition, the height and width of each control in a
  * <code>RowLayout</code> can be specified by setting a <code>RowData</code>
  * object into the control using <code>setLayoutData ()</code>.
  * </p>
  * <p>
  * The following example code creates a <code>RowLayout</code>, sets all
  * of its fields to non-default values, and then sets it into a
  * <code>Shell</code>.
  * <pre>
  * 		RowLayout rowLayout = new RowLayout();
  * 		rowLayout.wrap = false;
  * 		rowLayout.pack = false;
  * 		rowLayout.justify = true;
  * 		rowLayout.type = SWT.VERTICAL;
  * 		rowLayout.marginLeft = 5;
  * 		rowLayout.marginTop = 5;
  * 		rowLayout.marginRight = 5;
  * 		rowLayout.marginBottom = 5;
  * 		rowLayout.spacing = 0;
  * 		shell.setLayout(rowLayout);
  * </pre>
  * If you are using the default field values, you only need one line of code:
  * <pre>
  * 		shell.setLayout(new RowLayout());
  * </pre>
  * </p>
  *
  * @see RowData
  * @see <a href="http://www.eclipse.org/swt/snippets/#rowlayout">RowLayout snippets</a>
  * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: LayoutExample</a>
  * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
  */
 public final class RowLayout extends Layout {

 	/**
 	 * type specifies whether the layout places controls in rows or
 	 * columns.
 	 *
 	 * The default value is HORIZONTAL.
 	 *
 	 * Possible values are: <ul>
 	 *    <li>HORIZONTAL: Position the controls horizontally from left to right</li>
 	 *    <li>VERTICAL: Position the controls vertically from top to bottom</li>
 	 * </ul>
 	 *
 	 * @since 2.0
 	 */
 	public int type = SWT.HORIZONTAL;

 	/**
 	 * marginWidth specifies the number of pixels of horizontal margin
 	 * that will be placed along the left and right edges of the layout.
 	 *
 	 * The default value is 0.
 	 *
 	 * @since 3.0
 	 */
  	public int marginWidth = 0;

 	/**
 	 * marginHeight specifies the number of pixels of vertical margin
 	 * that will be placed along the top and bottom edges of the layout.
 	 *
 	 * The default value is 0.
 	 *
 	 * @since 3.0
 	 */
  	public int marginHeight = 0;

 	/**
 	 * spacing specifies the number of pixels between the edge of one cell
 	 * and the edge of its neighbouring cell.
 	 *
 	 * The default value is 3.
 	 */
 	public int spacing = 3;

 	/**
 	 * wrap specifies whether a control will be wrapped to the next
 	 * row if there is insufficient space on the current row.
 	 *
 	 * The default value is true.
 	 */
 	public boolean wrap = true;

 	/**
 	 * pack specifies whether all controls in the layout take
 	 * their preferred size.  If pack is false, all controls will
 	 * have the same size which is the size required to accommodate the
 	 * largest preferred height and the largest preferred width of all
 	 * the controls in the layout.
 	 *
 	 * The default value is true.
 	 */
 	public boolean pack = true;

 	/**
 	 * fill specifies whether the controls in a row should be
 	 * all the same height for horizontal layouts, or the same
 	 * width for vertical layouts.
 	 *
 	 * The default value is false.
 	 *
 	 * @since 3.0
 	 */
 	public boolean fill = false;

 	/**
 	 * center specifies whether the controls in a row should be
 	 * centered vertically in each cell for horizontal layouts,
 	 * or centered horizontally in each cell for vertical layouts.
 	 *
 	 * The default value is false.
 	 *
 	 * @since 3.4
 	 */
 	public boolean center = false;

 	/**
 	 * justify specifies whether the controls in a row should be
 	 * fully justified, with any extra space placed between the controls.
 	 *
 	 * The default value is false.
 	 */
 	public boolean justify = false;

 	/**
 	 * marginLeft specifies the number of pixels of horizontal margin
 	 * that will be placed along the left edge of the layout.
 	 *
 	 * The default value is 3.
 	 */
 	public int marginLeft = 3;

 	/**
 	 * marginTop specifies the number of pixels of vertical margin
 	 * that will be placed along the top edge of the layout.
 	 *
 	 * The default value is 3.
 	 */
 	public int marginTop = 3;

 	/**
 	 * marginRight specifies the number of pixels of horizontal margin
 	 * that will be placed along the right edge of the layout.
 	 *
 	 * The default value is 3.
 	 */
 	public int marginRight = 3;

 	/**
 	 * marginBottom specifies the number of pixels of vertical margin
 	 * that will be placed along the bottom edge of the layout.
 	 *
 	 * The default value is 3.
 	 */
 	public int marginBottom = 3;

 /**
  * Constructs a new instance of this class.
  */
 public RowLayout () {
 }

 /**
  * Constructs a new instance of this class given the type.
  *
  * @param type the type of row layout
  *
  * @since 2.0
  */
 public RowLayout (int type) {
 	this.type = type;
 }

 protected Point computeSize (Composite composite, int wHint, int hHint, boolean flushCache) {
 	Point extent;
 	if (type == SWT.HORIZONTAL) {
 		extent = layoutHorizontal (composite, false, (wHint != SWT.DEFAULT) && wrap, wHint, flushCache);
 	} else {
 		extent = layoutVertical (composite, false, (hHint != SWT.DEFAULT) && wrap, hHint, flushCache);
 	}
 	if (wHint != SWT.DEFAULT) extent.x = wHint;
 	if (hHint != SWT.DEFAULT) extent.y = hHint;
 	return extent;
 }

 Point computeSize (Control control, boolean flushCache) {
 	int wHint = SWT.DEFAULT, hHint = SWT.DEFAULT;
 	RowData data = (RowData) control.getLayoutData ();
 	if (data != null) {
 		wHint = data.width;
 		hHint = data.height;
 	}
 	return control.computeSize (wHint, hHint, flushCache);
 }

 protected boolean flushCache (Control control) {
 	return true;
 }

 String getName () {
 	String string = getClass ().getName ();
 	int index = string.lastIndexOf ('.');
 	if (index == -1) return string;
 	return string.substring (index + 1, string.length ());
 }

 protected void layout (Composite composite, boolean flushCache) {
 	Rectangle clientArea = composite.getClientArea ();
 	if (type == SWT.HORIZONTAL) {
 		layoutHorizontal (composite, true, wrap, clientArea.width, flushCache);
 	} else {
 		layoutVertical (composite, true, wrap, clientArea.height, flushCache);
 	}
 }

 Point layoutHorizontal (Composite composite, boolean move, boolean wrap, int width, boolean flushCache) {
 	Control [] children = composite.getChildren ();
 	int count = 0;
 	for (int i=0; i<children.length; i++) {
 		Control control = children [i];
 		RowData data = (RowData) control.getLayoutData ();
 		if (data == null || !data.exclude) {
 			children [count++] = children [i];
 		}
 	}
 	if (count == 0) {
 		return new Point (marginLeft + marginWidth * 2 + marginRight, marginTop + marginHeight * 2 + marginBottom);
 	}
 	int childWidth = 0, childHeight = 0, maxHeight = 0;
 	if (!pack) {
 		for (int i=0; i<count; i++) {
 			Control child = children [i];
 			Point size = computeSize (child, flushCache);
 			childWidth = Math.max (childWidth, size.x);
 			childHeight = Math.max (childHeight, size.y);
 		}
 		maxHeight = childHeight;
 	}
 	int clientX = 0, clientY = 0;
 	if (move) {
 		Rectangle rect = composite.getClientArea ();
 		clientX = rect.x;
 		clientY = rect.y;
 	}
 	int [] wraps = null;
 	boolean wrapped = false;
 	Rectangle [] bounds = null;
 	if (move && (justify || fill || center)) {
 		bounds = new Rectangle [count];
 		wraps = new int [count];
 	}
 	int maxX = 0, x = marginLeft + marginWidth, y = marginTop + marginHeight;
 	for (int i=0; i<count; i++) {
 		Control child = children [i];
 		if (pack) {
 			Point size = computeSize (child, flushCache);
 			childWidth = size.x;
 			childHeight = size.y;
 		}
 		if (wrap && (i != 0) && (x + childWidth > width)) {
 			wrapped = true;
 			if (move && (justify || fill || center)) wraps [i - 1] = maxHeight;
 			x = marginLeft + marginWidth;
 			y += spacing + maxHeight;
 			if (pack) maxHeight = 0;
 		}
 		if (pack || fill || center) {
 			maxHeight = Math.max (maxHeight, childHeight);
 		}
 		if (move) {
 			int childX = x + clientX, childY = y + clientY;
 			if (justify || fill || center) {
 				bounds [i] = new Rectangle (childX, childY, childWidth, childHeight);
 			} else {
 				child.setBounds (childX, childY, childWidth, childHeight);
 			}
 		}
 		x += spacing + childWidth;
 		maxX = Math.max (maxX, x);
 	}
 	maxX = Math.max (clientX + marginLeft + marginWidth, maxX - spacing);
 	if (!wrapped) maxX += marginRight + marginWidth;
 	if (move && (justify || fill || center)) {
 		int space = 0, margin = 0;
 		if (!wrapped) {
 			space = Math.max (0, (width - maxX) / (count + 1));
 			margin = Math.max (0, ((width - maxX) % (count + 1)) / 2);
 		} else {
 			if (fill || justify || center) {
 				int last = 0;
 				if (count > 0) wraps [count - 1] = maxHeight;
 				for (int i=0; i<count; i++) {
 					if (wraps [i] != 0) {
 						int wrapCount = i - last + 1;
 						if (justify) {
 							int wrapX = 0;
 							for (int j=last; j<=i; j++) {
 								wrapX += bounds [j].width + spacing;
 							}
 							space = Math.max (0, (width - wrapX) / (wrapCount + 1));
 							margin = Math.max (0, ((width - wrapX) % (wrapCount + 1)) / 2);
 						}
 						for (int j=last; j<=i; j++) {
 							if (justify) bounds [j].x += (space * (j - last + 1)) + margin;
 							if (fill) {
 								bounds [j].height = wraps [i];
 							} else {
 								if (center) {
 									bounds [j].y += Math.max (0, (wraps [i] - bounds [j].height) / 2);
 								}
 							}
 						}
 						last = i + 1;
 					}
 				}
 			}
 		}
 		for (int i=0; i<count; i++) {
 			if (!wrapped) {
 				if (justify) bounds [i].x += (space * (i + 1)) + margin;
 				if (fill) {
 					bounds [i].height = maxHeight;
 				} else {
 					if (center) {
 						bounds [i].y += Math.max (0, (maxHeight - bounds [i].height) / 2);
 					}
 				}
 			}
 			children [i].setBounds (bounds [i]);
 		}
 	}
 	return new Point (maxX, y + maxHeight + marginBottom + marginHeight);
 }

 Point layoutVertical (Composite composite, boolean move, boolean wrap, int height, boolean flushCache) {
 	Control [] children = composite.getChildren ();
 	int count = 0;
 	for (int i=0; i<children.length; i++) {
 		Control control = children [i];
 		RowData data = (RowData) control.getLayoutData ();
 		if (data == null || !data.exclude) {
 			children [count++] = children [i];
 		}
 	}
 	if (count == 0) {
 		return new Point (marginLeft + marginWidth * 2 + marginRight, marginTop + marginHeight * 2 + marginBottom);
 	}
 	int childWidth = 0, childHeight = 0, maxWidth = 0;
 	if (!pack) {
 		for (int i=0; i<count; i++) {
 			Control child = children [i];
 			Point size = computeSize (child, flushCache);
 			childWidth = Math.max (childWidth, size.x);
 			childHeight = Math.max (childHeight, size.y);
 		}
 		maxWidth = childWidth;
 	}
 	int clientX = 0, clientY = 0;
 	if (move) {
 		Rectangle rect = composite.getClientArea ();
 		clientX = rect.x;
 		clientY = rect.y;
 	}
 	int [] wraps = null;
 	boolean wrapped = false;
 	Rectangle [] bounds = null;
 	if (move && (justify || fill || center)) {
 		bounds = new Rectangle [count];
 		wraps = new int [count];
 	}
 	int maxY = 0, x = marginLeft + marginWidth, y = marginTop + marginHeight;
 	for (int i=0; i<count; i++) {
 		Control child = children [i];
 		if (pack) {
 			Point size = computeSize (child, flushCache);
 			childWidth = size.x;
 			childHeight = size.y;
 		}
 		if (wrap && (i != 0) && (y + childHeight > height)) {
 			wrapped = true;
 			if (move && (justify || fill || center)) wraps [i - 1] = maxWidth;
 			x += spacing + maxWidth;
 			y = marginTop + marginHeight;
 			if (pack) maxWidth = 0;
 		}
 		if (pack || fill || center) {
 			maxWidth = Math.max (maxWidth, childWidth);
 		}
 		if (move) {
 			int childX = x + clientX, childY = y + clientY;
 			if (justify || fill || center) {
 				bounds [i] = new Rectangle (childX, childY, childWidth, childHeight);
 			} else {
 				child.setBounds (childX, childY, childWidth, childHeight);
 			}
 		}
 		y += spacing + childHeight;
 		maxY = Math.max (maxY, y);
 	}
 	maxY = Math.max (clientY + marginTop + marginHeight, maxY - spacing);
 	if (!wrapped) maxY += marginBottom + marginHeight;
 	if (move && (justify || fill || center)) {
 		int space = 0, margin = 0;
 		if (!wrapped) {
 			space = Math.max (0, (height - maxY) / (count + 1));
 			margin = Math.max (0, ((height - maxY) % (count + 1)) / 2);
 		} else {
 			if (fill || justify || center) {
 				int last = 0;
 				if (count > 0) wraps [count - 1] = maxWidth;
 				for (int i=0; i<count; i++) {
 					if (wraps [i] != 0) {
 						int wrapCount = i - last + 1;
 						if (justify) {
 							int wrapY = 0;
 							for (int j=last; j<=i; j++) {
 								wrapY += bounds [j].height + spacing;
 							}
 							space = Math.max (0, (height - wrapY) / (wrapCount + 1));
 							margin = Math.max (0, ((height - wrapY) % (wrapCount + 1)) / 2);
 						}
 						for (int j=last; j<=i; j++) {
 							if (justify) bounds [j].y += (space * (j - last + 1)) + margin;
 							if (fill) {
 								bounds [j].width = wraps [i];
 							} else {
 								if (center) {
 									bounds [j].x += Math.max (0, (wraps [i] - bounds [j].width) / 2);
 								}
 							}
 						}
 						last = i + 1;
 					}
 				}
 			}
 		}
 		for (int i=0; i<count; i++) {
 			if (!wrapped) {
 				if (justify) bounds [i].y += (space * (i + 1)) + margin;
 				if (fill) {
 					bounds [i].width = maxWidth;
 				} else {
 					if (center) {
 						bounds [i].x += Math.max (0, (maxWidth - bounds [i].width) / 2);
 					}
 				}

 			}
 			children [i].setBounds (bounds [i]);
 		}
 	}
 	return new Point (x + maxWidth + marginRight + marginWidth, maxY);
 }

 /**
  * Returns a string containing a concise, human-readable
  * description of the receiver.
  *
  * @return a string representation of the layout
  */
 public String toString () {
  	String string = getName ()+" {";
  	string += "type="+((type != SWT.HORIZONTAL) ? "SWT.VERTICAL" : "SWT.HORIZONTAL")+" ";
  	if (marginWidth != 0) string += "marginWidth="+marginWidth+" ";
  	if (marginHeight != 0) string += "marginHeight="+marginHeight+" ";
  	if (marginLeft != 0) string += "marginLeft="+marginLeft+" ";
  	if (marginTop != 0) string += "marginTop="+marginTop+" ";
  	if (marginRight != 0) string += "marginRight="+marginRight+" ";
  	if (marginBottom != 0) string += "marginBottom="+marginBottom+" ";
  	if (spacing != 0) string += "spacing="+spacing+" ";
  	string += "wrap="+wrap+" ";
 	string += "pack="+pack+" ";
 	string += "fill="+fill+" ";
 	string += "justify="+justify+" ";
 	string = string.trim();
 	string += "}";
  	return string;
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2008 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.layout;

	import org.eclipse.swt.*;
	import org.eclipse.swt.graphics.*;
	import org.eclipse.swt.widgets.*;

	/**
	* Instances of this class determine the size and position of the
	* children of a <code>Composite</code> by placing them either in
	* horizontal rows or vertical columns within the parent <code>Composite</code>.
	* <p>
	* <code>RowLayout</code> aligns all controls in one row if the
	* <code>type</code> is set to horizontal, and one column if it is
	* set to vertical. It has the ability to wrap, and provides configurable
	* margins and spacing. <code>RowLayout</code> has a number of configuration
	* fields. In addition, the height and width of each control in a
	* <code>RowLayout</code> can be specified by setting a <code>RowData</code>
	* object into the control using <code>setLayoutData ()</code>.
	* </p>
	* <p>
	* The following example code creates a <code>RowLayout</code>, sets all
	* of its fields to non-default values, and then sets it into a
	* <code>Shell</code>.
	* <pre>
	* RowLayout rowLayout = new RowLayout();
	* rowLayout.wrap = false;
	* rowLayout.pack = false;
	* rowLayout.justify = true;
	* rowLayout.type = SWT.VERTICAL;
	* rowLayout.marginLeft = 5;
	* rowLayout.marginTop = 5;
	* rowLayout.marginRight = 5;
	* rowLayout.marginBottom = 5;
	* rowLayout.spacing = 0;
	* shell.setLayout(rowLayout);
	* </pre>
	* If you are using the default field values, you only need one line of code:
	* <pre>
	* shell.setLayout(new RowLayout());
	* </pre>
	* </p>
	*
	* @see RowData
	* @see <a href="http://www.eclipse.org/swt/snippets/#rowlayout">RowLayout snippets</a>
	* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: LayoutExample</a>
	* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
	*/
	public final class RowLayout extends Layout {

	/**
	* type specifies whether the layout places controls in rows or
	* columns.
	*
	* The default value is HORIZONTAL.
	*
	* Possible values are: <ul>
	* <li>HORIZONTAL: Position the controls horizontally from left to right</li>
	* <li>VERTICAL: Position the controls vertically from top to bottom</li>
	* </ul>
	*
	* @since 2.0
	*/
	public int type = SWT.HORIZONTAL;

	/**
	* marginWidth specifies the number of pixels of horizontal margin
	* that will be placed along the left and right edges of the layout.
	*
	* The default value is 0.
	*
	* @since 3.0
	*/
	public int marginWidth = 0;

	/**
	* marginHeight specifies the number of pixels of vertical margin
	* that will be placed along the top and bottom edges of the layout.
	*
	* The default value is 0.
	*
	* @since 3.0
	*/
	public int marginHeight = 0;

	/**
	* spacing specifies the number of pixels between the edge of one cell
	* and the edge of its neighbouring cell.
	*
	* The default value is 3.
	*/
	public int spacing = 3;

	/**
	* wrap specifies whether a control will be wrapped to the next
	* row if there is insufficient space on the current row.
	*
	* The default value is true.
	*/
	public boolean wrap = true;

	/**
	* pack specifies whether all controls in the layout take
	* their preferred size. If pack is false, all controls will
	* have the same size which is the size required to accommodate the
	* largest preferred height and the largest preferred width of all
	* the controls in the layout.
	*
	* The default value is true.
	*/
	public boolean pack = true;

	/**
	* fill specifies whether the controls in a row should be
	* all the same height for horizontal layouts, or the same
	* width for vertical layouts.
	*
	* The default value is false.
	*
	* @since 3.0
	*/
	public boolean fill = false;

	/**
	* center specifies whether the controls in a row should be
	* centered vertically in each cell for horizontal layouts,
	* or centered horizontally in each cell for vertical layouts.
	*
	* The default value is false.
	*
	* @since 3.4
	*/
	public boolean center = false;

	/**
	* justify specifies whether the controls in a row should be
	* fully justified, with any extra space placed between the controls.
	*
	* The default value is false.
	*/
	public boolean justify = false;

	/**
	* marginLeft specifies the number of pixels of horizontal margin
	* that will be placed along the left edge of the layout.
	*
	* The default value is 3.
	*/
	public int marginLeft = 3;

	/**
	* marginTop specifies the number of pixels of vertical margin
	* that will be placed along the top edge of the layout.
	*
	* The default value is 3.
	*/
	public int marginTop = 3;

	/**
	* marginRight specifies the number of pixels of horizontal margin
	* that will be placed along the right edge of the layout.
	*
	* The default value is 3.
	*/
	public int marginRight = 3;

	/**
	* marginBottom specifies the number of pixels of vertical margin
	* that will be placed along the bottom edge of the layout.
	*
	* The default value is 3.
	*/
	public int marginBottom = 3;

	/**
	* Constructs a new instance of this class.
	*/
	public RowLayout () {
	}

	/**
	* Constructs a new instance of this class given the type.
	*
	* @param type the type of row layout
	*
	* @since 2.0
	*/
	public RowLayout (int type) {
	this.type = type;
	}

	protected Point computeSize (Composite composite, int wHint, int hHint, boolean flushCache) {
	Point extent;
	if (type == SWT.HORIZONTAL) {
	extent = layoutHorizontal (composite, false, (wHint != SWT.DEFAULT) && wrap, wHint, flushCache);
	} else {
	extent = layoutVertical (composite, false, (hHint != SWT.DEFAULT) && wrap, hHint, flushCache);
	}
	if (wHint != SWT.DEFAULT) extent.x = wHint;
	if (hHint != SWT.DEFAULT) extent.y = hHint;
	return extent;
	}

	Point computeSize (Control control, boolean flushCache) {
	int wHint = SWT.DEFAULT, hHint = SWT.DEFAULT;
	RowData data = (RowData) control.getLayoutData ();
	if (data != null) {
	wHint = data.width;
	hHint = data.height;
	}
	return control.computeSize (wHint, hHint, flushCache);
	}

	protected boolean flushCache (Control control) {
	return true;
	}

	String getName () {
	String string = getClass ().getName ();
	int index = string.lastIndexOf ('.');
	if (index == -1) return string;
	return string.substring (index + 1, string.length ());
	}

	protected void layout (Composite composite, boolean flushCache) {
	Rectangle clientArea = composite.getClientArea ();
	if (type == SWT.HORIZONTAL) {
	layoutHorizontal (composite, true, wrap, clientArea.width, flushCache);
	} else {
	layoutVertical (composite, true, wrap, clientArea.height, flushCache);
	}
	}

	Point layoutHorizontal (Composite composite, boolean move, boolean wrap, int width, boolean flushCache) {
	Control [] children = composite.getChildren ();
	int count = 0;
	for (int i=0; i<children.length; i++) {
	Control control = children [i];
	RowData data = (RowData) control.getLayoutData ();
	if (data == null \|\| !data.exclude) {
	children [count++] = children [i];
	}
	}
	if (count == 0) {
	return new Point (marginLeft + marginWidth * 2 + marginRight, marginTop + marginHeight * 2 + marginBottom);
	}
	int childWidth = 0, childHeight = 0, maxHeight = 0;
	if (!pack) {
	for (int i=0; i<count; i++) {
	Control child = children [i];
	Point size = computeSize (child, flushCache);
	childWidth = Math.max (childWidth, size.x);
	childHeight = Math.max (childHeight, size.y);
	}
	maxHeight = childHeight;
	}
	int clientX = 0, clientY = 0;
	if (move) {
	Rectangle rect = composite.getClientArea ();
	clientX = rect.x;
	clientY = rect.y;
	}
	int [] wraps = null;
	boolean wrapped = false;
	Rectangle [] bounds = null;
	if (move && (justify \|\| fill \|\| center)) {
	bounds = new Rectangle [count];
	wraps = new int [count];
	}
	int maxX = 0, x = marginLeft + marginWidth, y = marginTop + marginHeight;
	for (int i=0; i<count; i++) {
	Control child = children [i];
	if (pack) {
	Point size = computeSize (child, flushCache);
	childWidth = size.x;
	childHeight = size.y;
	}
	if (wrap && (i != 0) && (x + childWidth > width)) {
	wrapped = true;
	if (move && (justify \|\| fill \|\| center)) wraps [i - 1] = maxHeight;
	x = marginLeft + marginWidth;
	y += spacing + maxHeight;
	if (pack) maxHeight = 0;
	}
	if (pack \|\| fill \|\| center) {
	maxHeight = Math.max (maxHeight, childHeight);
	}
	if (move) {
	int childX = x + clientX, childY = y + clientY;
	if (justify \|\| fill \|\| center) {
	bounds [i] = new Rectangle (childX, childY, childWidth, childHeight);
	} else {
	child.setBounds (childX, childY, childWidth, childHeight);
	}
	}
	x += spacing + childWidth;
	maxX = Math.max (maxX, x);
	}
	maxX = Math.max (clientX + marginLeft + marginWidth, maxX - spacing);
	if (!wrapped) maxX += marginRight + marginWidth;
	if (move && (justify \|\| fill \|\| center)) {
	int space = 0, margin = 0;
	if (!wrapped) {
	space = Math.max (0, (width - maxX) / (count + 1));
	margin = Math.max (0, ((width - maxX) % (count + 1)) / 2);
	} else {
	if (fill \|\| justify \|\| center) {
	int last = 0;
	if (count > 0) wraps [count - 1] = maxHeight;
	for (int i=0; i<count; i++) {
	if (wraps [i] != 0) {
	int wrapCount = i - last + 1;
	if (justify) {
	int wrapX = 0;
	for (int j=last; j<=i; j++) {
	wrapX += bounds [j].width + spacing;
	}
	space = Math.max (0, (width - wrapX) / (wrapCount + 1));
	margin = Math.max (0, ((width - wrapX) % (wrapCount + 1)) / 2);
	}
	for (int j=last; j<=i; j++) {
	if (justify) bounds [j].x += (space * (j - last + 1)) + margin;
	if (fill) {
	bounds [j].height = wraps [i];
	} else {
	if (center) {
	bounds [j].y += Math.max (0, (wraps [i] - bounds [j].height) / 2);
	}
	}
	}
	last = i + 1;
	}
	}
	}
	}
	for (int i=0; i<count; i++) {
	if (!wrapped) {
	if (justify) bounds [i].x += (space * (i + 1)) + margin;
	if (fill) {
	bounds [i].height = maxHeight;
	} else {
	if (center) {
	bounds [i].y += Math.max (0, (maxHeight - bounds [i].height) / 2);
	}
	}
	}
	children [i].setBounds (bounds [i]);
	}
	}
	return new Point (maxX, y + maxHeight + marginBottom + marginHeight);
	}

	Point layoutVertical (Composite composite, boolean move, boolean wrap, int height, boolean flushCache) {
	Control [] children = composite.getChildren ();
	int count = 0;
	for (int i=0; i<children.length; i++) {
	Control control = children [i];
	RowData data = (RowData) control.getLayoutData ();
	if (data == null \|\| !data.exclude) {
	children [count++] = children [i];
	}
	}
	if (count == 0) {
	return new Point (marginLeft + marginWidth * 2 + marginRight, marginTop + marginHeight * 2 + marginBottom);
	}
	int childWidth = 0, childHeight = 0, maxWidth = 0;
	if (!pack) {
	for (int i=0; i<count; i++) {
	Control child = children [i];
	Point size = computeSize (child, flushCache);
	childWidth = Math.max (childWidth, size.x);
	childHeight = Math.max (childHeight, size.y);
	}
	maxWidth = childWidth;
	}
	int clientX = 0, clientY = 0;
	if (move) {
	Rectangle rect = composite.getClientArea ();
	clientX = rect.x;
	clientY = rect.y;
	}
	int [] wraps = null;
	boolean wrapped = false;
	Rectangle [] bounds = null;
	if (move && (justify \|\| fill \|\| center)) {
	bounds = new Rectangle [count];
	wraps = new int [count];
	}
	int maxY = 0, x = marginLeft + marginWidth, y = marginTop + marginHeight;
	for (int i=0; i<count; i++) {
	Control child = children [i];
	if (pack) {
	Point size = computeSize (child, flushCache);
	childWidth = size.x;
	childHeight = size.y;
	}
	if (wrap && (i != 0) && (y + childHeight > height)) {
	wrapped = true;
	if (move && (justify \|\| fill \|\| center)) wraps [i - 1] = maxWidth;
	x += spacing + maxWidth;
	y = marginTop + marginHeight;
	if (pack) maxWidth = 0;
	}
	if (pack \|\| fill \|\| center) {
	maxWidth = Math.max (maxWidth, childWidth);
	}
	if (move) {
	int childX = x + clientX, childY = y + clientY;
	if (justify \|\| fill \|\| center) {
	bounds [i] = new Rectangle (childX, childY, childWidth, childHeight);
	} else {
	child.setBounds (childX, childY, childWidth, childHeight);
	}
	}
	y += spacing + childHeight;
	maxY = Math.max (maxY, y);
	}
	maxY = Math.max (clientY + marginTop + marginHeight, maxY - spacing);
	if (!wrapped) maxY += marginBottom + marginHeight;
	if (move && (justify \|\| fill \|\| center)) {
	int space = 0, margin = 0;
	if (!wrapped) {
	space = Math.max (0, (height - maxY) / (count + 1));
	margin = Math.max (0, ((height - maxY) % (count + 1)) / 2);
	} else {
	if (fill \|\| justify \|\| center) {
	int last = 0;
	if (count > 0) wraps [count - 1] = maxWidth;
	for (int i=0; i<count; i++) {
	if (wraps [i] != 0) {
	int wrapCount = i - last + 1;
	if (justify) {
	int wrapY = 0;
	for (int j=last; j<=i; j++) {
	wrapY += bounds [j].height + spacing;
	}
	space = Math.max (0, (height - wrapY) / (wrapCount + 1));
	margin = Math.max (0, ((height - wrapY) % (wrapCount + 1)) / 2);
	}
	for (int j=last; j<=i; j++) {
	if (justify) bounds [j].y += (space * (j - last + 1)) + margin;
	if (fill) {
	bounds [j].width = wraps [i];
	} else {
	if (center) {
	bounds [j].x += Math.max (0, (wraps [i] - bounds [j].width) / 2);
	}
	}
	}
	last = i + 1;
	}
	}
	}
	}
	for (int i=0; i<count; i++) {
	if (!wrapped) {
	if (justify) bounds [i].y += (space * (i + 1)) + margin;
	if (fill) {
	bounds [i].width = maxWidth;
	} else {
	if (center) {
	bounds [i].x += Math.max (0, (maxWidth - bounds [i].width) / 2);
	}
	}

	}
	children [i].setBounds (bounds [i]);
	}
	}
	return new Point (x + maxWidth + marginRight + marginWidth, maxY);
	}

	/**
	* Returns a string containing a concise, human-readable
	* description of the receiver.
	*
	* @return a string representation of the layout
	*/
	public String toString () {
	String string = getName ()+" {";
	string += "type="+((type != SWT.HORIZONTAL) ? "SWT.VERTICAL" : "SWT.HORIZONTAL")+" ";
	if (marginWidth != 0) string += "marginWidth="+marginWidth+" ";
	if (marginHeight != 0) string += "marginHeight="+marginHeight+" ";
	if (marginLeft != 0) string += "marginLeft="+marginLeft+" ";
	if (marginTop != 0) string += "marginTop="+marginTop+" ";
	if (marginRight != 0) string += "marginRight="+marginRight+" ";
	if (marginBottom != 0) string += "marginBottom="+marginBottom+" ";
	if (spacing != 0) string += "spacing="+spacing+" ";
	string += "wrap="+wrap+" ";
	string += "pack="+pack+" ";
	string += "fill="+fill+" ";
	string += "justify="+justify+" ";
	string = string.trim();
	string += "}";
	return string;
	}
	}