bundles/org.eclipse.swt/Eclipse SWT Custom Widgets/common/org/eclipse/swt/custom/SashForm.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.custom;


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

 /**
  * The SashForm lays out its children in a Row or Column arrangement (as specified
  * by the orientation) and places a Sash between the children.
  * One child may be maximized to occupy the entire size of the SashForm.
  * The relative sizes of the children may be specfied using weights.
  *
  * <p>
  * <dl>
  * <dt><b>Styles:</b><dd>HORIZONTAL, VERTICAL
  * </dl>
  */
 public class SashForm extends Composite {

 	public int SASH_WIDTH = 3;

 	private static final int DRAG_MINIMUM = 20;

 	private int orientation = SWT.HORIZONTAL;
 	private Sash[] sashes = new Sash[0];
 	private Control[] controls = new Control[0];
 	private Control maxControl = null;
 	private Listener sashListener;
 	private final static String LAYOUT_RATIO = "layout ratio"; //$NON-NLS-1$

 /**
  * Constructs a new instance of this class given its parent
  * and a style value describing its behavior and appearance.
  * <p>
  * The style value is either one of the style constants defined in
  * class <code>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
  * lists the style constants that are applicable to the class.
  * Style bits are also inherited from superclasses.
  * </p>
  *
  * @param parent a widget which will be the parent of the new instance (cannot be null)
  * @param style the style of widget 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>
  * </ul>
  *
  * @see SWT#HORIZONTAL
  * @see SWT#VERTICAL
  * @see #getStyle
  */
 public SashForm(Composite parent, int style) {
 	super(parent, checkStyle(style));
 	if ((style & SWT.VERTICAL) != 0){
 		orientation = SWT.VERTICAL;
 	}

 	this.addListener(SWT.Resize, new Listener() {
 		public void handleEvent(Event e) {
 			layout(true);
 		}
 	});

 	sashListener = new Listener() {
 		public void handleEvent(Event e) {
 			onDragSash(e);
 		}
 	};
 }
 private static int checkStyle (int style) {
 	int mask = SWT.BORDER | SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT;
 	return style & mask;
 }
 public Point computeSize (int wHint, int hHint, boolean changed) {
 	checkWidget();
 	Control[] controls = getControls(true);
 	if (controls.length == 0) return new Point(wHint, hHint);

 	int width = 0;
 	int height = 0;
 	boolean vertical = (orientation == SWT.VERTICAL);
 	if (vertical) {
 		height += (controls.length - 1) * SASH_WIDTH;
 	} else {
 		width += (controls.length - 1) * SASH_WIDTH;
 	}
 	for (int i = 0; i < controls.length; i++) {
 		if (vertical) {
 			Point size = controls[i].computeSize(wHint, SWT.DEFAULT);
 			height += size.y;
 			width = Math.max(width, size.x);
 		} else {
 			Point size = controls[i].computeSize(SWT.DEFAULT, hHint);
 			width += size.x;
 			height = Math.max(height, size.y);
 		}
 	}
 	if (wHint != SWT.DEFAULT) width = wHint;
 	if (hHint != SWT.DEFAULT) height = hHint;

 	return new Point(width, height);
 }
 /**
  * Returns SWT.HORIZONTAL if the controls in the SashForm are laid out side by side
  * or SWT.VERTICAL   if the controls in the SashForm are laid out top to bottom.
  *
  * @return SWT.HORIZONTAL or SWT.VERTICAL
  */
 public int getOrientation() {
 	//checkWidget();
 	return orientation;
 }
 /**
  * Answer the control that currently is maximized in the SashForm.
  * This value may be null.
  *
  * @return the control that currently is maximized or null
  */
 public Control getMaximizedControl(){
 	//checkWidget();
 	return this.maxControl;
 }
 /**
  * Answer the relative weight of each child in the SashForm.  The weight represents the
  * percent of the total width (if SashForm has Horizontal orientation) or
  * total height (if SashForm has Vertical orientation) each control occupies.
  * The weights are returned in order of the creation of the widgets (weight[0]
  * corresponds to the weight of the first child created).
  *
  * @return the relative weight of each child
  *
  * @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 int[] getWeights() {
 	checkWidget();
 	Control[] cArray = getControls(false);
 	int[] ratios = new int[cArray.length];
 	for (int i = 0; i < cArray.length; i++) {
 		Long ratio = (Long)cArray[i].getData(LAYOUT_RATIO);
 		if (ratio != null) {
 			ratios[i] = (int)(ratio.longValue() * 1000 >> 16);
 		} else {
 			ratios[i] = 200;
 		}
 	}
 	return ratios;
 }
 private Control[] getControls(boolean onlyVisible) {
 	Control[] children = getChildren();
 	Control[] controls = new Control[0];
 	for (int i = 0; i < children.length; i++) {
 		if (children[i] instanceof Sash) continue;
 		if (onlyVisible && !children[i].getVisible()) continue;

 		Control[] newControls = new Control[controls.length + 1];
 		System.arraycopy(controls, 0, newControls, 0, controls.length);
 		newControls[controls.length] = children[i];
 		controls = newControls;
 	}
 	return controls;
 }
 public void layout(boolean changed) {
 	checkWidget();
 	Rectangle area = getClientArea();
 	if (area.width == 0 || area.height == 0) return;

 	Control[] newControls = getControls(true);
 	if (controls.length == 0 && newControls.length == 0) return;
 	controls = newControls;

 	if (maxControl != null && !maxControl.isDisposed()) {
 		for (int i= 0; i < controls.length; i++){
 			if (controls[i] != maxControl) {
 				controls[i].setBounds(-200, -200, 0, 0);
 			} else {
 				controls[i].setBounds(area);
 			}
 		}
 		return;
 	}

 	// keep just the right number of sashes
 	if (sashes.length < controls.length - 1) {
 		Sash[] newSashes = new Sash[controls.length - 1];
 		System.arraycopy(sashes, 0, newSashes, 0, sashes.length);
 		int sashOrientation = (orientation == SWT.HORIZONTAL) ? SWT.VERTICAL : SWT.HORIZONTAL;
 		for (int i = sashes.length; i < newSashes.length; i++) {
 			newSashes[i] = new Sash(this, sashOrientation);
 			newSashes[i].addListener(SWT.Selection, sashListener);
 		}
 		sashes = newSashes;
 	}
 	if (sashes.length > controls.length - 1) {
 		if (controls.length == 0) {
 			for (int i = 0; i < sashes.length; i++) {
 				sashes[i].dispose();
 			}
 			sashes = new Sash[0];
 		} else {
 			Sash[] newSashes = new Sash[controls.length - 1];
 			System.arraycopy(sashes, 0, newSashes, 0, newSashes.length);
 			for (int i = controls.length - 1; i < sashes.length; i++) {
 				sashes[i].dispose();
 			}
 			sashes = newSashes;
 		}
 	}

 	if (controls.length == 0) return;

 	// get the ratios
 	long[] ratios = new long[controls.length];
 	long total = 0;
 	for (int i = 0; i < controls.length; i++) {
 		Long ratio = (Long)controls[i].getData(LAYOUT_RATIO);
 		if (ratio != null) {
 			ratios[i] = ratio.longValue();
 		} else {
 			ratios[i] = ((200 << 16) + 999) / 1000;
 		}
 		total += ratios[i];
 	}

 	if (orientation == SWT.HORIZONTAL) {
 		total += (((long)(sashes.length * SASH_WIDTH) << 16) + area.width - 1) / area.width;
 	} else {
 		total += (((long)(sashes.length * SASH_WIDTH) << 16) + area.height - 1) / area.height;
 	}

 	if (orientation == SWT.HORIZONTAL) {
 		int width = (int)(ratios[0] * area.width / total);
 		int x = area.x;
 		controls[0].setBounds(x, area.y, width, area.height);
 		x += width;
 		for (int i = 1; i < controls.length - 1; i++) {
 			sashes[i - 1].setBounds(x, area.y, SASH_WIDTH, area.height);
 			x += SASH_WIDTH;
 			width = (int)(ratios[i] * area.width / total);
 			controls[i].setBounds(x, area.y, width, area.height);
 			x += width;
 		}
 		if (controls.length > 1) {
 			sashes[sashes.length - 1].setBounds(x, area.y, SASH_WIDTH, area.height);
 			x += SASH_WIDTH;
 			width = area.width - x;
 			controls[controls.length - 1].setBounds(x, area.y, width, area.height);
 		}
 	} else {
 		int height = (int)(ratios[0] * area.height / total);
 		int y = area.y;
 		controls[0].setBounds(area.x, y, area.width, height);
 		y += height;
 		for (int i = 1; i < controls.length - 1; i++) {
 			sashes[i - 1].setBounds(area.x, y, area.width, SASH_WIDTH);
 			y += SASH_WIDTH;
 			height = (int)(ratios[i] * area.height / total);
 			controls[i].setBounds(area.x, y, area.width, height);
 			y += height;
 		}
 		if (controls.length > 1) {
 			sashes[sashes.length - 1].setBounds(area.x, y, area.width, SASH_WIDTH);
 			y += SASH_WIDTH;
 			height = area.height - y;
 			controls[controls.length - 1].setBounds(area.x, y, area.width, height);
 		}

 	}
 }
 private void onDragSash(Event event) {
 	if (event.detail == SWT.DRAG) {
 		// constrain feedback
 		Rectangle area = getClientArea();
 		if (orientation == SWT.HORIZONTAL) {
 			event.x = Math.min(Math.max(DRAG_MINIMUM, event.x), area.width - DRAG_MINIMUM);
 		} else {
 			event.y = Math.min(Math.max(DRAG_MINIMUM, event.y), area.height - DRAG_MINIMUM);
 		}
 		return;
 	}

 	Sash sash = (Sash)event.widget;
 	int sashIndex = -1;
 	for (int i= 0; i < sashes.length; i++) {
 		if (sashes[i] == sash) {
 			sashIndex = i;
 			break;
 		}
 	}
 	if (sashIndex == -1) return;

 	Control c1 = controls[sashIndex];
 	Control c2 = controls[sashIndex + 1];
 	Rectangle b1 = c1.getBounds();
 	Rectangle b2 = c2.getBounds();

 	Rectangle sashBounds = sash.getBounds();
 	Rectangle area = getClientArea();
 	if (orientation == SWT.HORIZONTAL) {
 		int shift = event.x - sashBounds.x;
 		b1.width += shift;
 		b2.x += shift;
 		b2.width -= shift;
 		if (b1.width < DRAG_MINIMUM || b2.width < DRAG_MINIMUM) {
 			return;
 		}
 		c1.setData(LAYOUT_RATIO, new Long((((long)b1.width << 16) + area.width - 1) / area.width));
 		c2.setData(LAYOUT_RATIO, new Long((((long)b2.width << 16) + area.width - 1) / area.width));
 	} else {
 		int shift = event.y - sashBounds.y;
 		b1.height += shift;
 		b2.y += shift;
 		b2.height -= shift;
 		if (b1.height < DRAG_MINIMUM || b2.height < DRAG_MINIMUM) {
 			return;
 		}
 		c1.setData(LAYOUT_RATIO, new Long((((long)b1.height << 16) + area.height - 1) / area.height));
 		c2.setData(LAYOUT_RATIO, new Long((((long)b2.height << 16) + area.height - 1) / area.height));
 	}

 	c1.setBounds(b1);
 	sash.setBounds(event.x, event.y, event.width, event.height);
 	c2.setBounds(b2);
 }
 /**
  * If orientation is SWT.HORIZONTAL, lay the controls in the SashForm
  * out side by side.  If orientation is SWT.VERTICAL, lay the
  * controls in the SashForm out top to bottom.
  *
  * @param orientation SWT.HORIZONTAL or SWT.VERTICAL
  *
  * @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>
  *    <li>ERROR_INVALID_ARGUMENT - if the value of orientation is not SWT.HORIZONTAL or SWT.VERTICAL
  * </ul>
  */
 public void setOrientation(int orientation) {
 	checkWidget();
 	if (this.orientation == orientation) return;
 	if (orientation != SWT.HORIZONTAL && orientation != SWT.VERTICAL) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	this.orientation = orientation;

 	int sashOrientation = (orientation == SWT.HORIZONTAL) ? SWT.VERTICAL : SWT.HORIZONTAL;
 	for (int i = 0; i < sashes.length; i++) {
 		sashes[i].dispose();
 		sashes[i] = new Sash(this, sashOrientation);
 		sashes[i].addListener(SWT.Selection, sashListener);
 	}
 	layout();
 }
 public void setLayout (Layout layout) {
 	checkWidget();
 }
 /**
  * Specify the control that should take up the entire client area of the SashForm.
  * If one control has been maximized, and this method is called with a different control,
  * the previous control will be minimized and the new control will be maximized..
  * if the value of control is null, the SashForm will minimize all controls and return to
  * the default layout where all controls are laid out separated by sashes.
  *
  * @param control the control to be maximized or null
  *
  * @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 setMaximizedControl(Control control){
 	checkWidget();
 	if (control == null) {
 		if (maxControl != null) {
 			this.maxControl = null;
 			layout();
 			for (int i= 0; i < sashes.length; i++){
 				sashes[i].setVisible(true);
 			}
 		}
 		return;
 	}

 	for (int i= 0; i < sashes.length; i++){
 		sashes[i].setVisible(false);
 	}
 	maxControl = control;
 	layout();
 }

 /**
  * Specify the relative weight of each child in the SashForm.  This will determine
  * what percent of the total width (if SashForm has Horizontal orientation) or
  * total height (if SashForm has Vertical orientation) each control will occupy.
  * The weights must be positive values and there must be an entry for each
  * non-sash child of the SashForm.
  *
  * @param weights the relative weight of each child
  *
  * @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>
  *    <li>ERROR_INVALID_ARGUMENT - if the weights value is null or of incorrect length (must match the number of children)</li>
  * </ul>
  */
 public void setWeights(int[] weights) {
 	checkWidget();
 	Control[] cArray = getControls(false);
 	if (weights == null || weights.length != cArray.length) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}

 	int total = 0;
 	for (int i = 0; i < weights.length; i++) {
 		if (weights[i] < 0) {
 			SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 		}
 		total += weights[i];
 	}
 	if (total == 0) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	for (int i = 0; i < cArray.length; i++) {
 		cArray[i].setData(LAYOUT_RATIO, new Long((((long)weights[i] << 16) + total - 1) / total));
 	}

 	layout();
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.custom;


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

	/**
	* The SashForm lays out its children in a Row or Column arrangement (as specified
	* by the orientation) and places a Sash between the children.
	* One child may be maximized to occupy the entire size of the SashForm.
	* The relative sizes of the children may be specfied using weights.
	*
	* <p>
	* <dl>
	* <dt><b>Styles:</b><dd>HORIZONTAL, VERTICAL
	* </dl>
	*/
	public class SashForm extends Composite {

	public int SASH_WIDTH = 3;

	private static final int DRAG_MINIMUM = 20;

	private int orientation = SWT.HORIZONTAL;
	private Sash[] sashes = new Sash[0];
	private Control[] controls = new Control[0];
	private Control maxControl = null;
	private Listener sashListener;
	private final static String LAYOUT_RATIO = "layout ratio"; //$NON-NLS-1$

	/**
	* Constructs a new instance of this class given its parent
	* and a style value describing its behavior and appearance.
	* <p>
	* The style value is either one of the style constants defined in
	* class <code>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
	* lists the style constants that are applicable to the class.
	* Style bits are also inherited from superclasses.
	* </p>
	*
	* @param parent a widget which will be the parent of the new instance (cannot be null)
	* @param style the style of widget 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>
	* </ul>
	*
	* @see SWT#HORIZONTAL
	* @see SWT#VERTICAL
	* @see #getStyle
	*/
	public SashForm(Composite parent, int style) {
	super(parent, checkStyle(style));
	if ((style & SWT.VERTICAL) != 0){
	orientation = SWT.VERTICAL;
	}

	this.addListener(SWT.Resize, new Listener() {
	public void handleEvent(Event e) {
	layout(true);
	}
	});

	sashListener = new Listener() {
	public void handleEvent(Event e) {
	onDragSash(e);
	}
	};
	}
	private static int checkStyle (int style) {
	int mask = SWT.BORDER \| SWT.LEFT_TO_RIGHT \| SWT.RIGHT_TO_LEFT;
	return style & mask;
	}
	public Point computeSize (int wHint, int hHint, boolean changed) {
	checkWidget();
	Control[] controls = getControls(true);
	if (controls.length == 0) return new Point(wHint, hHint);

	int width = 0;
	int height = 0;
	boolean vertical = (orientation == SWT.VERTICAL);
	if (vertical) {
	height += (controls.length - 1) * SASH_WIDTH;
	} else {
	width += (controls.length - 1) * SASH_WIDTH;
	}
	for (int i = 0; i < controls.length; i++) {
	if (vertical) {
	Point size = controls[i].computeSize(wHint, SWT.DEFAULT);
	height += size.y;
	width = Math.max(width, size.x);
	} else {
	Point size = controls[i].computeSize(SWT.DEFAULT, hHint);
	width += size.x;
	height = Math.max(height, size.y);
	}
	}
	if (wHint != SWT.DEFAULT) width = wHint;
	if (hHint != SWT.DEFAULT) height = hHint;

	return new Point(width, height);
	}
	/**
	* Returns SWT.HORIZONTAL if the controls in the SashForm are laid out side by side
	* or SWT.VERTICAL if the controls in the SashForm are laid out top to bottom.
	*
	* @return SWT.HORIZONTAL or SWT.VERTICAL
	*/
	public int getOrientation() {
	//checkWidget();
	return orientation;
	}
	/**
	* Answer the control that currently is maximized in the SashForm.
	* This value may be null.
	*
	* @return the control that currently is maximized or null
	*/
	public Control getMaximizedControl(){
	//checkWidget();
	return this.maxControl;
	}
	/**
	* Answer the relative weight of each child in the SashForm. The weight represents the
	* percent of the total width (if SashForm has Horizontal orientation) or
	* total height (if SashForm has Vertical orientation) each control occupies.
	* The weights are returned in order of the creation of the widgets (weight[0]
	* corresponds to the weight of the first child created).
	*
	* @return the relative weight of each child
	*
	* @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 int[] getWeights() {
	checkWidget();
	Control[] cArray = getControls(false);
	int[] ratios = new int[cArray.length];
	for (int i = 0; i < cArray.length; i++) {
	Long ratio = (Long)cArray[i].getData(LAYOUT_RATIO);
	if (ratio != null) {
	ratios[i] = (int)(ratio.longValue() * 1000 >> 16);
	} else {
	ratios[i] = 200;
	}
	}
	return ratios;
	}
	private Control[] getControls(boolean onlyVisible) {
	Control[] children = getChildren();
	Control[] controls = new Control[0];
	for (int i = 0; i < children.length; i++) {
	if (children[i] instanceof Sash) continue;
	if (onlyVisible && !children[i].getVisible()) continue;

	Control[] newControls = new Control[controls.length + 1];
	System.arraycopy(controls, 0, newControls, 0, controls.length);
	newControls[controls.length] = children[i];
	controls = newControls;
	}
	return controls;
	}
	public void layout(boolean changed) {
	checkWidget();
	Rectangle area = getClientArea();
	if (area.width == 0 \|\| area.height == 0) return;

	Control[] newControls = getControls(true);
	if (controls.length == 0 && newControls.length == 0) return;
	controls = newControls;

	if (maxControl != null && !maxControl.isDisposed()) {
	for (int i= 0; i < controls.length; i++){
	if (controls[i] != maxControl) {
	controls[i].setBounds(-200, -200, 0, 0);
	} else {
	controls[i].setBounds(area);
	}
	}
	return;
	}

	// keep just the right number of sashes
	if (sashes.length < controls.length - 1) {
	Sash[] newSashes = new Sash[controls.length - 1];
	System.arraycopy(sashes, 0, newSashes, 0, sashes.length);
	int sashOrientation = (orientation == SWT.HORIZONTAL) ? SWT.VERTICAL : SWT.HORIZONTAL;
	for (int i = sashes.length; i < newSashes.length; i++) {
	newSashes[i] = new Sash(this, sashOrientation);
	newSashes[i].addListener(SWT.Selection, sashListener);
	}
	sashes = newSashes;
	}
	if (sashes.length > controls.length - 1) {
	if (controls.length == 0) {
	for (int i = 0; i < sashes.length; i++) {
	sashes[i].dispose();
	}
	sashes = new Sash[0];
	} else {
	Sash[] newSashes = new Sash[controls.length - 1];
	System.arraycopy(sashes, 0, newSashes, 0, newSashes.length);
	for (int i = controls.length - 1; i < sashes.length; i++) {
	sashes[i].dispose();
	}
	sashes = newSashes;
	}
	}

	if (controls.length == 0) return;

	// get the ratios
	long[] ratios = new long[controls.length];
	long total = 0;
	for (int i = 0; i < controls.length; i++) {
	Long ratio = (Long)controls[i].getData(LAYOUT_RATIO);
	if (ratio != null) {
	ratios[i] = ratio.longValue();
	} else {
	ratios[i] = ((200 << 16) + 999) / 1000;
	}
	total += ratios[i];
	}

	if (orientation == SWT.HORIZONTAL) {
	total += (((long)(sashes.length * SASH_WIDTH) << 16) + area.width - 1) / area.width;
	} else {
	total += (((long)(sashes.length * SASH_WIDTH) << 16) + area.height - 1) / area.height;
	}

	if (orientation == SWT.HORIZONTAL) {
	int width = (int)(ratios[0] * area.width / total);
	int x = area.x;
	controls[0].setBounds(x, area.y, width, area.height);
	x += width;
	for (int i = 1; i < controls.length - 1; i++) {
	sashes[i - 1].setBounds(x, area.y, SASH_WIDTH, area.height);
	x += SASH_WIDTH;
	width = (int)(ratios[i] * area.width / total);
	controls[i].setBounds(x, area.y, width, area.height);
	x += width;
	}
	if (controls.length > 1) {
	sashes[sashes.length - 1].setBounds(x, area.y, SASH_WIDTH, area.height);
	x += SASH_WIDTH;
	width = area.width - x;
	controls[controls.length - 1].setBounds(x, area.y, width, area.height);
	}
	} else {
	int height = (int)(ratios[0] * area.height / total);
	int y = area.y;
	controls[0].setBounds(area.x, y, area.width, height);
	y += height;
	for (int i = 1; i < controls.length - 1; i++) {
	sashes[i - 1].setBounds(area.x, y, area.width, SASH_WIDTH);
	y += SASH_WIDTH;
	height = (int)(ratios[i] * area.height / total);
	controls[i].setBounds(area.x, y, area.width, height);
	y += height;
	}
	if (controls.length > 1) {
	sashes[sashes.length - 1].setBounds(area.x, y, area.width, SASH_WIDTH);
	y += SASH_WIDTH;
	height = area.height - y;
	controls[controls.length - 1].setBounds(area.x, y, area.width, height);
	}

	}
	}
	private void onDragSash(Event event) {
	if (event.detail == SWT.DRAG) {
	// constrain feedback
	Rectangle area = getClientArea();
	if (orientation == SWT.HORIZONTAL) {
	event.x = Math.min(Math.max(DRAG_MINIMUM, event.x), area.width - DRAG_MINIMUM);
	} else {
	event.y = Math.min(Math.max(DRAG_MINIMUM, event.y), area.height - DRAG_MINIMUM);
	}
	return;
	}

	Sash sash = (Sash)event.widget;
	int sashIndex = -1;
	for (int i= 0; i < sashes.length; i++) {
	if (sashes[i] == sash) {
	sashIndex = i;
	break;
	}
	}
	if (sashIndex == -1) return;

	Control c1 = controls[sashIndex];
	Control c2 = controls[sashIndex + 1];
	Rectangle b1 = c1.getBounds();
	Rectangle b2 = c2.getBounds();

	Rectangle sashBounds = sash.getBounds();
	Rectangle area = getClientArea();
	if (orientation == SWT.HORIZONTAL) {
	int shift = event.x - sashBounds.x;
	b1.width += shift;
	b2.x += shift;
	b2.width -= shift;
	if (b1.width < DRAG_MINIMUM \|\| b2.width < DRAG_MINIMUM) {
	return;
	}
	c1.setData(LAYOUT_RATIO, new Long((((long)b1.width << 16) + area.width - 1) / area.width));
	c2.setData(LAYOUT_RATIO, new Long((((long)b2.width << 16) + area.width - 1) / area.width));
	} else {
	int shift = event.y - sashBounds.y;
	b1.height += shift;
	b2.y += shift;
	b2.height -= shift;
	if (b1.height < DRAG_MINIMUM \|\| b2.height < DRAG_MINIMUM) {
	return;
	}
	c1.setData(LAYOUT_RATIO, new Long((((long)b1.height << 16) + area.height - 1) / area.height));
	c2.setData(LAYOUT_RATIO, new Long((((long)b2.height << 16) + area.height - 1) / area.height));
	}

	c1.setBounds(b1);
	sash.setBounds(event.x, event.y, event.width, event.height);
	c2.setBounds(b2);
	}
	/**
	* If orientation is SWT.HORIZONTAL, lay the controls in the SashForm
	* out side by side. If orientation is SWT.VERTICAL, lay the
	* controls in the SashForm out top to bottom.
	*
	* @param orientation SWT.HORIZONTAL or SWT.VERTICAL
	*
	* @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>
	* <li>ERROR_INVALID_ARGUMENT - if the value of orientation is not SWT.HORIZONTAL or SWT.VERTICAL
	* </ul>
	*/
	public void setOrientation(int orientation) {
	checkWidget();
	if (this.orientation == orientation) return;
	if (orientation != SWT.HORIZONTAL && orientation != SWT.VERTICAL) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	this.orientation = orientation;

	int sashOrientation = (orientation == SWT.HORIZONTAL) ? SWT.VERTICAL : SWT.HORIZONTAL;
	for (int i = 0; i < sashes.length; i++) {
	sashes[i].dispose();
	sashes[i] = new Sash(this, sashOrientation);
	sashes[i].addListener(SWT.Selection, sashListener);
	}
	layout();
	}
	public void setLayout (Layout layout) {
	checkWidget();
	}
	/**
	* Specify the control that should take up the entire client area of the SashForm.
	* If one control has been maximized, and this method is called with a different control,
	* the previous control will be minimized and the new control will be maximized..
	* if the value of control is null, the SashForm will minimize all controls and return to
	* the default layout where all controls are laid out separated by sashes.
	*
	* @param control the control to be maximized or null
	*
	* @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 setMaximizedControl(Control control){
	checkWidget();
	if (control == null) {
	if (maxControl != null) {
	this.maxControl = null;
	layout();
	for (int i= 0; i < sashes.length; i++){
	sashes[i].setVisible(true);
	}
	}
	return;
	}

	for (int i= 0; i < sashes.length; i++){
	sashes[i].setVisible(false);
	}
	maxControl = control;
	layout();
	}

	/**
	* Specify the relative weight of each child in the SashForm. This will determine
	* what percent of the total width (if SashForm has Horizontal orientation) or
	* total height (if SashForm has Vertical orientation) each control will occupy.
	* The weights must be positive values and there must be an entry for each
	* non-sash child of the SashForm.
	*
	* @param weights the relative weight of each child
	*
	* @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>
	* <li>ERROR_INVALID_ARGUMENT - if the weights value is null or of incorrect length (must match the number of children)</li>
	* </ul>
	*/
	public void setWeights(int[] weights) {
	checkWidget();
	Control[] cArray = getControls(false);
	if (weights == null \|\| weights.length != cArray.length) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}

	int total = 0;
	for (int i = 0; i < weights.length; i++) {
	if (weights[i] < 0) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	total += weights[i];
	}
	if (total == 0) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	for (int i = 0; i < cArray.length; i++) {
	cArray[i].setData(LAYOUT_RATIO, new Long((((long)weights[i] << 16) + total - 1) / total));
	}

	layout();
	}
	}