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

 package org.eclipse.swt.custom;

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

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

 public class ViewForm extends Composite {

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

 	/**
 	 * Color of innermost line of drop shadow border.
 	 */
 	public static RGB borderInsideRGB  = new RGB (132, 130, 132);
 	/**
 	 * Color of middle line of drop shadow border.
 	 */
 	public static RGB borderMiddleRGB  = new RGB (143, 141, 138);
 	/**
 	 * Color of outermost line of drop shadow border.
 	 */
 	public static RGB borderOutsideRGB = new RGB (171, 168, 165);

 	// SWT widgets
 	private Control topLeft;
 	private Control topCenter;
 	private Control topRight;
 	private Control content;

 	// Configuration and state info
 	private boolean separateTopCenter = false;
 	private int drawLine1 = -1;
 	private int drawLine2 = -1;

 	private boolean showBorder = false;

 	private int BORDER_TOP = 0;
 	private int BORDER_BOTTOM = 0;
 	private int BORDER_LEFT = 0;
 	private int BORDER_RIGHT = 0;

 	private Color borderColor1;
 	private Color borderColor2;
 	private Color borderColor3;

 	private Rectangle oldArea;
 	private static final int OFFSCREEN = -200;
 /**
  * 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
  * for all SWT widget classes should include a comment which
  * describes the style constants which are applicable to the class.
  * </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
  * @see #getStyle
  */
 public ViewForm(Composite parent, int style) {
 	super(parent, checkStyle(style));

 	borderColor1 = new Color(getDisplay(), borderInsideRGB);
 	borderColor2 = new Color(getDisplay(), borderMiddleRGB);
 	borderColor3 = new Color(getDisplay(), borderOutsideRGB);
 	setBorderVisible((style & SWT.BORDER) != 0);

 	addPaintListener(new PaintListener() {
 		public void paintControl(PaintEvent event) {
 			onPaint(event.gc);
 		}
 	});
 	addControlListener(new ControlAdapter(){
 		public void controlResized(ControlEvent e) {
 			onResize();
 		}
 	});

 	addListener(SWT.Dispose, new Listener() {
 		public void handleEvent(Event e) {
 			onDispose();
 		}
 	});
 }
 /**
  * Check the style bits to ensure that no invalid styles are applied.
  * @private
  */
 private static int checkStyle (int style) {
 	int mask = SWT.FLAT;
 	return style & mask | SWT.NO_REDRAW_RESIZE;
 }
 public Point computeSize(int wHint, int hHint, boolean changed) {
 	checkWidget();
 	// size of title bar area
 	Point leftSize = new Point(0, 0);
 	if (topLeft != null) {
 		leftSize = topLeft.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 	}
 	Point centerSize = new Point(0, 0);
 	if (topCenter != null) {
 		 centerSize = topCenter.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 	}
 	Point rightSize = new Point(0, 0);
 	if (topRight != null) {
 		 rightSize = topRight.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 	}
 	Point size = new Point(0, 0);
 	// calculate width of title bar
 	if (separateTopCenter) {
 		size.x = leftSize.x + rightSize.x;
 		size.x = Math.max(centerSize.x, size.x);
 		size.y = Math.max(leftSize.y, rightSize.y);
 		if (topCenter != null){
 			size.y += centerSize.y;
 		}
 	} else {
 		size.x = leftSize.x + centerSize.x + rightSize.x;
 		size.y = Math.max(leftSize.y, Math.max(centerSize.y, rightSize.y));
 	}

 	if (content != null) {
 		Point contentSize = new Point(0, 0);
 		contentSize = content.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 		size.x = Math.max (size.x, contentSize.x);
 		size.y += contentSize.y;
 	}

 	size.x += 2 * marginWidth + BORDER_LEFT + BORDER_RIGHT;
 	size.y += 2 * marginHeight + BORDER_TOP + BORDER_BOTTOM;

 	return size;
 }
 public Rectangle getClientArea() {
 	checkWidget();
 	Rectangle clientArea = super.getClientArea();
 	clientArea.x += BORDER_LEFT;
 	clientArea.y += BORDER_TOP;
 	clientArea.width -= BORDER_LEFT + BORDER_RIGHT;
 	clientArea.height -= BORDER_TOP + BORDER_BOTTOM;
 	return clientArea;
 }
 /**
 * Returns the content area.
 *
 * @return the control in the content area of the pane or null
 */
 public Control getContent() {
 	//checkWidget();
 	return content;
 }
 /**
 * Returns Control that appears in the top center of the pane.
 * Typically this is a toolbar.
 *
 * @return the control in the top center of the pane or null
 */
 public Control getTopCenter() {
 	//checkWidget();
 	return topCenter;
 }
 /**
 * Returns the Control that appears in the top left corner of the pane.
 * Typically this is a label such as CLabel.
 *
 * @return the control in the top left corner of the pane or null
 */
 public Control getTopLeft() {
 	//checkWidget();
 	return topLeft;
 }
 /**
 * Returns the control in the top right corner of the pane.
 * Typically this is a Close button or a composite with a Menu and Close button.
 *
 * @return the control in the top right corner of the pane or null
 */
 public Control getTopRight() {
 	//checkWidget();
 	return topRight;
 }
 public void layout (boolean changed) {
 	checkWidget();
 	Rectangle rect = getClientArea();

 	drawLine1 = -1;
 	drawLine2 = -1;

 	Point leftSize = new Point(0, 0);
 	if (topLeft != null && !topLeft.isDisposed()) {
 		leftSize = topLeft.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 	}
 	Point centerSize = new Point(0, 0);
 	if (topCenter != null && !topCenter.isDisposed()) {
 		 centerSize = topCenter.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 	}
 	Point rightSize = new Point(0, 0);
 	if (topRight != null && !topRight.isDisposed()) {
 		 rightSize = topRight.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 	}

 	int minTopWidth = leftSize.x + centerSize.x + rightSize.x + 2*marginWidth + 1; // +1 for highlight line
 	int height = rect.y + marginHeight;

 	boolean top = false;
 	if (separateTopCenter || minTopWidth > rect.width) {;
 		int topHeight = Math.max(rightSize.y, leftSize.y);
 		if (topRight != null && !topRight.isDisposed()) {
 			top = true;
 			topRight.setBounds(rect.x + rect.width - marginWidth - rightSize.x,
 			                   rect.y + 1 + marginHeight,
 			                   rightSize.x, topHeight);
 			height += 1 + topHeight; // +1 for highlight line
 		}
 		if (topLeft != null && !topLeft.isDisposed()) {
 			top = true;
 			leftSize = topLeft.computeSize(rect.width - 2* marginWidth - rightSize.x - 1, SWT.DEFAULT);
 			topLeft.setBounds(rect.x + 1 + marginWidth,
 			                  rect.y + 1 + marginHeight,
 			                  leftSize.x, topHeight);
 			height = Math.max(height, rect.y + marginHeight + 1 + topHeight); // +1 for highlight line
 		}
 		if (topCenter != null && !topCenter.isDisposed()) {
 			top = true;
 			if (height > rect.y + marginHeight) {
 				drawLine1 = height;
 				height += 1; // +1 for divider line
 			}
 			centerSize = topCenter.computeSize(rect.width - 2 * marginWidth, SWT.DEFAULT);
 			topCenter.setBounds(rect.x + rect.width - marginWidth - centerSize.x,
 			                    height,
 			                    centerSize.x, centerSize.y);
 			height += centerSize.y;

 		}
 	} else {
 		int topHeight = Math.max(rightSize.y, Math.max(centerSize.y, leftSize.y));
 		if (topRight != null && !topRight.isDisposed()) {
 			top = true;
 			topRight.setBounds(rect.x + rect.width - marginWidth - rightSize.x,
 			                   rect.y + marginHeight + 1, // +1 for highlight line
 			                   rightSize.x, topHeight);
 			height += 1 + topHeight; // +1 for highlight line
 		}
 		if (topCenter != null && !topCenter.isDisposed()) {
 			top = true;
 			topCenter.setBounds(rect.x + rect.width - marginWidth - rightSize.x - centerSize.x,
 			                    rect.y + marginHeight + 1, // +1 for highlight line
 			                    centerSize.x, topHeight);
 			height = Math.max(height, rect.y + marginHeight + 1 + topHeight); // +1 for highlight line
 		}
 		if (topLeft != null && !topLeft.isDisposed()) {
 			top = true;
 			leftSize = topLeft.computeSize(rect.width - 2 * marginWidth - rightSize.x - centerSize.x - 1, topHeight);
 			topLeft.setBounds(rect.x + marginWidth + 1, // +1 for highlight line
 			                  rect.y + marginHeight + 1, // +1 for highlight line
 			                  leftSize.x, topHeight);
 			height = Math.max(height, rect.y + marginHeight + 1 + topHeight); // +1 for highlight line
 		}
 	}

 	if (content != null && !content.isDisposed()) {
 		if (top) {
 			drawLine2 = height;
 			height += 1; // +1 for divider line
 		}
 		 content.setBounds(rect.x + marginWidth,
 		                   height,
 		                   rect.width - 2 * marginWidth,
 		                   rect.y + rect.height - height - marginHeight);
 	}
 }
 private void onDispose() {
 	if (borderColor1 != null) {
 		borderColor1.dispose();
 	}
 	borderColor1 = null;

 	if (borderColor2 != null) {
 		borderColor2.dispose();
 	}
 	borderColor2 = null;

 	if (borderColor3 != null) {
 		borderColor3.dispose();
 	}
 	borderColor3 = null;

 	topLeft = null;
 	topCenter = null;
 	topRight = null;
 	content = null;
 	oldArea = null;
 }
 /**
 * Draws the focus border.
 */
 private void onPaint(GC gc) {
 	Rectangle d = super.getClientArea();

 	if (showBorder) {
 		if ((getStyle() & SWT.FLAT) !=0) {
 			gc.setForeground(borderColor1);
 			gc.drawRectangle(d.x, d.y, d.x + d.width - 1, d.y + d.height - 1);
 		} else {
 			gc.setForeground(borderColor1);
 			gc.drawRectangle(d.x, d.y, d.x + d.width - 3, d.y + d.height - 3);

 			gc.setForeground(borderColor2);
 			gc.drawLine(d.x + 1,           d.y + d.height - 2, d.x + d.width - 1, d.y + d.height - 2);
 			gc.drawLine(d.x + d.width - 2, d.y + 1,            d.x + d.width - 2, d.y + d.height - 1);

 			gc.setForeground(borderColor3);
 			gc.drawLine(d.x + 2,           d.y + d.height - 1, d.x + d.width - 2, d.y + d.height - 1);
 			gc.drawLine(d.x + d.width - 1, d.y + 2,            d.x + d.width - 1, d.y + d.height - 2);
 		}
 	}

 	if (drawLine1 != -1) {
 		// top seperator line
 		gc.setForeground(borderColor1);
 		gc.drawLine(d.x + BORDER_LEFT, drawLine1, d.x + d.width - BORDER_RIGHT, drawLine1);
 	}
 	if (drawLine2 != -1) {
 		// content separator line
 		gc.setForeground(borderColor1);
 		gc.drawLine(d.x + BORDER_LEFT, drawLine2, d.x + d.width - BORDER_RIGHT, drawLine2);
 	}
 	// highlight on top
 	int y = drawLine1;
 	if (y == -1){
 		y = drawLine2;
 	}
 	if (y != -1) {
 		gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW));
 		gc.drawLine(d.x + BORDER_LEFT + marginWidth, d.y + BORDER_TOP + marginHeight,
 		            d.x + BORDER_LEFT + marginWidth, y - 1);
 		gc.drawLine(d.x + BORDER_LEFT + marginWidth, d.y + BORDER_TOP + marginHeight,
 		            d.x + d.width - BORDER_RIGHT - marginWidth - 1, d.y + BORDER_TOP + marginHeight);
 	}

 	gc.setForeground(getForeground());
 }
 private void onResize() {
 	layout();

 	Rectangle area = super.getClientArea();
 	if (oldArea == null || oldArea.width == 0 || oldArea.height == 0) {
 		redraw();
 	} else {
 		int width = 0;
 		if (oldArea.width < area.width) {
 			width = area.width - oldArea.width + BORDER_RIGHT;
 		} else if (oldArea.width > area.width) {
 			width = BORDER_RIGHT;
 		}
 		redraw(area.x + area.width - width, area.y, width, area.height, false);

 		int height = 0;
 		if (oldArea.height < area.height) {
 			height = area.height - oldArea.height + BORDER_BOTTOM;
 		}
 		if (oldArea.height > area.height) {
 			height = BORDER_BOTTOM;
 		}
 		redraw(area.x, area.y + area.height - height, area.width, height, false);
 	}
 	oldArea = area;
 }
 /**
 * Sets the content.
 * Setting the content to null will remove it from
 * the pane - however, the creator of the content must dispose of the content.
 *
 * @param c the control to be displayed in the content area 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 setContent(Control content) {
 	checkWidget();
 	if (content != null && content.getParent() != this) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	if (this.content != null && !this.content.isDisposed()) {
 		this.content.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
 	}
 	this.content = content;
 	layout();
 }

 /**
 * Set the widget font.
 * This will apply the font to the topLeft, topRight and topCenter widgets.
 */
 public void setFont(Font f) {
 	super.setFont(f);
 	if (topLeft != null && !topLeft.isDisposed()) topLeft.setFont(f);
 	if (topCenter != null && !topCenter.isDisposed()) topCenter.setFont(f);
 	if (topRight != null && !topRight.isDisposed()) topRight.setFont(f);

 	layout();
 }
 /**
  * Sets the layout which is associated with the receiver to be
  * the argument which may be null.
  * <p>
  * Note : ViewForm does not use a layout class to size and position its children.
  * </p>
  *
  * @param the receiver's new layout 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 setLayout (Layout layout) {
 	checkWidget();
 	return;
 }
 /**
 * Set the control that appears in the top center of the pane.
 * Typically this is a toolbar.
 * The topCenter is optional.  Setting the topCenter to null will remove it from
 * the pane - however, the creator of the topCenter must dispose of the topCenter.
 *
 * @param c the control to be displayed in the top center 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 setTopCenter(Control topCenter) {
 	checkWidget();
 	if (topCenter != null && topCenter.getParent() != this) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	if (this.topCenter != null && !this.topCenter.isDisposed()) {
 		this.topCenter.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
 	}
 	this.topCenter = topCenter;
 	layout();
 }
 /**
 * Set the control that appears in the top left corner of the pane.
 * Typically this is a label such as CLabel.
 * The topLeft is optional.  Setting the top left control to null will remove it from
 * the pane - however, the creator of the control must dispose of the control.
 *
 * @param c the control to be displayed in the top left corner 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 setTopLeft(Control c) {
 	checkWidget();
 	if (c != null && c.getParent() != this) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	if (this.topLeft != null && !this.topLeft.isDisposed()) {
 		this.topLeft.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
 	}
 	this.topLeft = c;
 	layout();
 }
 /**
 * Set the control that appears in the top right corner of the pane.
 * Typically this is a Close button or a composite with a Menu and Close button.
 * The topRight is optional.  Setting the top right control to null will remove it from
 * the pane - however, the creator of the control must dispose of the control.
 *
 * @param c the control to be displayed in the top right corner 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>
 *    <li>ERROR_INVALID_ARGUMENT - if the control is not a child of this ViewForm</li>
 * </ul>
 */
 public void setTopRight(Control c) {
 	checkWidget();
 	if (c != null && c.getParent() != this) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	if (this.topRight != null && !this.topRight.isDisposed()) {
 		this.topRight.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
 	}
 	this.topRight = c;
 	layout();
 }
 /**
 * Specify whether the border should be displayed or not.
 *
 * @param show true if the border should be displayed
 *
 * @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 setBorderVisible(boolean show) {
 	checkWidget();
 	if (showBorder == show) return;

 	showBorder = show;
 	if (showBorder) {
 		if ((getStyle() & SWT.FLAT)!= 0) {
 			BORDER_LEFT = BORDER_TOP = BORDER_RIGHT = BORDER_BOTTOM = 1;
 		} else {
 			BORDER_LEFT = BORDER_TOP = 1;
 			BORDER_RIGHT = BORDER_BOTTOM = 3;
 		}
 	} else {
 		BORDER_BOTTOM = BORDER_TOP = BORDER_LEFT = BORDER_RIGHT = 0;
 	}

 	layout();
 	redraw();
 }
 /**
 * If true, the topCenter will always appear on a separate line by itself, otherwise the
 * topCenter will appear in the top row if there is room and will be moved to the second row if
 * required.
 *
 * @param show true if the topCenter will always appear on a separate line by itself
 *
 * @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 setTopCenterSeparate(boolean show) {
 	checkWidget();
 	separateTopCenter = show;
 	layout();
 }

 }
	package org.eclipse.swt.custom;

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

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

	public class ViewForm extends Composite {

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

	/**
	* Color of innermost line of drop shadow border.
	*/
	public static RGB borderInsideRGB = new RGB (132, 130, 132);
	/**
	* Color of middle line of drop shadow border.
	*/
	public static RGB borderMiddleRGB = new RGB (143, 141, 138);
	/**
	* Color of outermost line of drop shadow border.
	*/
	public static RGB borderOutsideRGB = new RGB (171, 168, 165);

	// SWT widgets
	private Control topLeft;
	private Control topCenter;
	private Control topRight;
	private Control content;

	// Configuration and state info
	private boolean separateTopCenter = false;
	private int drawLine1 = -1;
	private int drawLine2 = -1;

	private boolean showBorder = false;

	private int BORDER_TOP = 0;
	private int BORDER_BOTTOM = 0;
	private int BORDER_LEFT = 0;
	private int BORDER_RIGHT = 0;

	private Color borderColor1;
	private Color borderColor2;
	private Color borderColor3;

	private Rectangle oldArea;
	private static final int OFFSCREEN = -200;
	/**
	* 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
	* for all SWT widget classes should include a comment which
	* describes the style constants which are applicable to the class.
	* </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
	* @see #getStyle
	*/
	public ViewForm(Composite parent, int style) {
	super(parent, checkStyle(style));

	borderColor1 = new Color(getDisplay(), borderInsideRGB);
	borderColor2 = new Color(getDisplay(), borderMiddleRGB);
	borderColor3 = new Color(getDisplay(), borderOutsideRGB);
	setBorderVisible((style & SWT.BORDER) != 0);

	addPaintListener(new PaintListener() {
	public void paintControl(PaintEvent event) {
	onPaint(event.gc);
	}
	});
	addControlListener(new ControlAdapter(){
	public void controlResized(ControlEvent e) {
	onResize();
	}
	});

	addListener(SWT.Dispose, new Listener() {
	public void handleEvent(Event e) {
	onDispose();
	}
	});
	}
	/**
	* Check the style bits to ensure that no invalid styles are applied.
	* @private
	*/
	private static int checkStyle (int style) {
	int mask = SWT.FLAT;
	return style & mask \| SWT.NO_REDRAW_RESIZE;
	}
	public Point computeSize(int wHint, int hHint, boolean changed) {
	checkWidget();
	// size of title bar area
	Point leftSize = new Point(0, 0);
	if (topLeft != null) {
	leftSize = topLeft.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	}
	Point centerSize = new Point(0, 0);
	if (topCenter != null) {
	centerSize = topCenter.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	}
	Point rightSize = new Point(0, 0);
	if (topRight != null) {
	rightSize = topRight.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	}
	Point size = new Point(0, 0);
	// calculate width of title bar
	if (separateTopCenter) {
	size.x = leftSize.x + rightSize.x;
	size.x = Math.max(centerSize.x, size.x);
	size.y = Math.max(leftSize.y, rightSize.y);
	if (topCenter != null){
	size.y += centerSize.y;
	}
	} else {
	size.x = leftSize.x + centerSize.x + rightSize.x;
	size.y = Math.max(leftSize.y, Math.max(centerSize.y, rightSize.y));
	}

	if (content != null) {
	Point contentSize = new Point(0, 0);
	contentSize = content.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	size.x = Math.max (size.x, contentSize.x);
	size.y += contentSize.y;
	}

	size.x += 2 * marginWidth + BORDER_LEFT + BORDER_RIGHT;
	size.y += 2 * marginHeight + BORDER_TOP + BORDER_BOTTOM;

	return size;
	}
	public Rectangle getClientArea() {
	checkWidget();
	Rectangle clientArea = super.getClientArea();
	clientArea.x += BORDER_LEFT;
	clientArea.y += BORDER_TOP;
	clientArea.width -= BORDER_LEFT + BORDER_RIGHT;
	clientArea.height -= BORDER_TOP + BORDER_BOTTOM;
	return clientArea;
	}
	/**
	* Returns the content area.
	*
	* @return the control in the content area of the pane or null
	*/
	public Control getContent() {
	//checkWidget();
	return content;
	}
	/**
	* Returns Control that appears in the top center of the pane.
	* Typically this is a toolbar.
	*
	* @return the control in the top center of the pane or null
	*/
	public Control getTopCenter() {
	//checkWidget();
	return topCenter;
	}
	/**
	* Returns the Control that appears in the top left corner of the pane.
	* Typically this is a label such as CLabel.
	*
	* @return the control in the top left corner of the pane or null
	*/
	public Control getTopLeft() {
	//checkWidget();
	return topLeft;
	}
	/**
	* Returns the control in the top right corner of the pane.
	* Typically this is a Close button or a composite with a Menu and Close button.
	*
	* @return the control in the top right corner of the pane or null
	*/
	public Control getTopRight() {
	//checkWidget();
	return topRight;
	}
	public void layout (boolean changed) {
	checkWidget();
	Rectangle rect = getClientArea();

	drawLine1 = -1;
	drawLine2 = -1;

	Point leftSize = new Point(0, 0);
	if (topLeft != null && !topLeft.isDisposed()) {
	leftSize = topLeft.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	}
	Point centerSize = new Point(0, 0);
	if (topCenter != null && !topCenter.isDisposed()) {
	centerSize = topCenter.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	}
	Point rightSize = new Point(0, 0);
	if (topRight != null && !topRight.isDisposed()) {
	rightSize = topRight.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	}

	int minTopWidth = leftSize.x + centerSize.x + rightSize.x + 2*marginWidth + 1; // +1 for highlight line
	int height = rect.y + marginHeight;

	boolean top = false;
	if (separateTopCenter \|\| minTopWidth > rect.width) {;
	int topHeight = Math.max(rightSize.y, leftSize.y);
	if (topRight != null && !topRight.isDisposed()) {
	top = true;
	topRight.setBounds(rect.x + rect.width - marginWidth - rightSize.x,
	rect.y + 1 + marginHeight,
	rightSize.x, topHeight);
	height += 1 + topHeight; // +1 for highlight line
	}
	if (topLeft != null && !topLeft.isDisposed()) {
	top = true;
	leftSize = topLeft.computeSize(rect.width - 2* marginWidth - rightSize.x - 1, SWT.DEFAULT);
	topLeft.setBounds(rect.x + 1 + marginWidth,
	rect.y + 1 + marginHeight,
	leftSize.x, topHeight);
	height = Math.max(height, rect.y + marginHeight + 1 + topHeight); // +1 for highlight line
	}
	if (topCenter != null && !topCenter.isDisposed()) {
	top = true;
	if (height > rect.y + marginHeight) {
	drawLine1 = height;
	height += 1; // +1 for divider line
	}
	centerSize = topCenter.computeSize(rect.width - 2 * marginWidth, SWT.DEFAULT);
	topCenter.setBounds(rect.x + rect.width - marginWidth - centerSize.x,
	height,
	centerSize.x, centerSize.y);
	height += centerSize.y;

	}
	} else {
	int topHeight = Math.max(rightSize.y, Math.max(centerSize.y, leftSize.y));
	if (topRight != null && !topRight.isDisposed()) {
	top = true;
	topRight.setBounds(rect.x + rect.width - marginWidth - rightSize.x,
	rect.y + marginHeight + 1, // +1 for highlight line
	rightSize.x, topHeight);
	height += 1 + topHeight; // +1 for highlight line
	}
	if (topCenter != null && !topCenter.isDisposed()) {
	top = true;
	topCenter.setBounds(rect.x + rect.width - marginWidth - rightSize.x - centerSize.x,
	rect.y + marginHeight + 1, // +1 for highlight line
	centerSize.x, topHeight);
	height = Math.max(height, rect.y + marginHeight + 1 + topHeight); // +1 for highlight line
	}
	if (topLeft != null && !topLeft.isDisposed()) {
	top = true;
	leftSize = topLeft.computeSize(rect.width - 2 * marginWidth - rightSize.x - centerSize.x - 1, topHeight);
	topLeft.setBounds(rect.x + marginWidth + 1, // +1 for highlight line
	rect.y + marginHeight + 1, // +1 for highlight line
	leftSize.x, topHeight);
	height = Math.max(height, rect.y + marginHeight + 1 + topHeight); // +1 for highlight line
	}
	}

	if (content != null && !content.isDisposed()) {
	if (top) {
	drawLine2 = height;
	height += 1; // +1 for divider line
	}
	content.setBounds(rect.x + marginWidth,
	height,
	rect.width - 2 * marginWidth,
	rect.y + rect.height - height - marginHeight);
	}
	}
	private void onDispose() {
	if (borderColor1 != null) {
	borderColor1.dispose();
	}
	borderColor1 = null;

	if (borderColor2 != null) {
	borderColor2.dispose();
	}
	borderColor2 = null;

	if (borderColor3 != null) {
	borderColor3.dispose();
	}
	borderColor3 = null;

	topLeft = null;
	topCenter = null;
	topRight = null;
	content = null;
	oldArea = null;
	}
	/**
	* Draws the focus border.
	*/
	private void onPaint(GC gc) {
	Rectangle d = super.getClientArea();

	if (showBorder) {
	if ((getStyle() & SWT.FLAT) !=0) {
	gc.setForeground(borderColor1);
	gc.drawRectangle(d.x, d.y, d.x + d.width - 1, d.y + d.height - 1);
	} else {
	gc.setForeground(borderColor1);
	gc.drawRectangle(d.x, d.y, d.x + d.width - 3, d.y + d.height - 3);

	gc.setForeground(borderColor2);
	gc.drawLine(d.x + 1, d.y + d.height - 2, d.x + d.width - 1, d.y + d.height - 2);
	gc.drawLine(d.x + d.width - 2, d.y + 1, d.x + d.width - 2, d.y + d.height - 1);

	gc.setForeground(borderColor3);
	gc.drawLine(d.x + 2, d.y + d.height - 1, d.x + d.width - 2, d.y + d.height - 1);
	gc.drawLine(d.x + d.width - 1, d.y + 2, d.x + d.width - 1, d.y + d.height - 2);
	}
	}

	if (drawLine1 != -1) {
	// top seperator line
	gc.setForeground(borderColor1);
	gc.drawLine(d.x + BORDER_LEFT, drawLine1, d.x + d.width - BORDER_RIGHT, drawLine1);
	}
	if (drawLine2 != -1) {
	// content separator line
	gc.setForeground(borderColor1);
	gc.drawLine(d.x + BORDER_LEFT, drawLine2, d.x + d.width - BORDER_RIGHT, drawLine2);
	}
	// highlight on top
	int y = drawLine1;
	if (y == -1){
	y = drawLine2;
	}
	if (y != -1) {
	gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW));
	gc.drawLine(d.x + BORDER_LEFT + marginWidth, d.y + BORDER_TOP + marginHeight,
	d.x + BORDER_LEFT + marginWidth, y - 1);
	gc.drawLine(d.x + BORDER_LEFT + marginWidth, d.y + BORDER_TOP + marginHeight,
	d.x + d.width - BORDER_RIGHT - marginWidth - 1, d.y + BORDER_TOP + marginHeight);
	}

	gc.setForeground(getForeground());
	}
	private void onResize() {
	layout();

	Rectangle area = super.getClientArea();
	if (oldArea == null \|\| oldArea.width == 0 \|\| oldArea.height == 0) {
	redraw();
	} else {
	int width = 0;
	if (oldArea.width < area.width) {
	width = area.width - oldArea.width + BORDER_RIGHT;
	} else if (oldArea.width > area.width) {
	width = BORDER_RIGHT;
	}
	redraw(area.x + area.width - width, area.y, width, area.height, false);

	int height = 0;
	if (oldArea.height < area.height) {
	height = area.height - oldArea.height + BORDER_BOTTOM;
	}
	if (oldArea.height > area.height) {
	height = BORDER_BOTTOM;
	}
	redraw(area.x, area.y + area.height - height, area.width, height, false);
	}
	oldArea = area;
	}
	/**
	* Sets the content.
	* Setting the content to null will remove it from
	* the pane - however, the creator of the content must dispose of the content.
	*
	* @param c the control to be displayed in the content area 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 setContent(Control content) {
	checkWidget();
	if (content != null && content.getParent() != this) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	if (this.content != null && !this.content.isDisposed()) {
	this.content.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
	}
	this.content = content;
	layout();
	}

	/**
	* Set the widget font.
	* This will apply the font to the topLeft, topRight and topCenter widgets.
	*/
	public void setFont(Font f) {
	super.setFont(f);
	if (topLeft != null && !topLeft.isDisposed()) topLeft.setFont(f);
	if (topCenter != null && !topCenter.isDisposed()) topCenter.setFont(f);
	if (topRight != null && !topRight.isDisposed()) topRight.setFont(f);

	layout();
	}
	/**
	* Sets the layout which is associated with the receiver to be
	* the argument which may be null.
	* <p>
	* Note : ViewForm does not use a layout class to size and position its children.
	* </p>
	*
	* @param the receiver's new layout 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 setLayout (Layout layout) {
	checkWidget();
	return;
	}
	/**
	* Set the control that appears in the top center of the pane.
	* Typically this is a toolbar.
	* The topCenter is optional. Setting the topCenter to null will remove it from
	* the pane - however, the creator of the topCenter must dispose of the topCenter.
	*
	* @param c the control to be displayed in the top center 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 setTopCenter(Control topCenter) {
	checkWidget();
	if (topCenter != null && topCenter.getParent() != this) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	if (this.topCenter != null && !this.topCenter.isDisposed()) {
	this.topCenter.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
	}
	this.topCenter = topCenter;
	layout();
	}
	/**
	* Set the control that appears in the top left corner of the pane.
	* Typically this is a label such as CLabel.
	* The topLeft is optional. Setting the top left control to null will remove it from
	* the pane - however, the creator of the control must dispose of the control.
	*
	* @param c the control to be displayed in the top left corner 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 setTopLeft(Control c) {
	checkWidget();
	if (c != null && c.getParent() != this) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	if (this.topLeft != null && !this.topLeft.isDisposed()) {
	this.topLeft.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
	}
	this.topLeft = c;
	layout();
	}
	/**
	* Set the control that appears in the top right corner of the pane.
	* Typically this is a Close button or a composite with a Menu and Close button.
	* The topRight is optional. Setting the top right control to null will remove it from
	* the pane - however, the creator of the control must dispose of the control.
	*
	* @param c the control to be displayed in the top right corner 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>
	* <li>ERROR_INVALID_ARGUMENT - if the control is not a child of this ViewForm</li>
	* </ul>
	*/
	public void setTopRight(Control c) {
	checkWidget();
	if (c != null && c.getParent() != this) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	if (this.topRight != null && !this.topRight.isDisposed()) {
	this.topRight.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
	}
	this.topRight = c;
	layout();
	}
	/**
	* Specify whether the border should be displayed or not.
	*
	* @param show true if the border should be displayed
	*
	* @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 setBorderVisible(boolean show) {
	checkWidget();
	if (showBorder == show) return;

	showBorder = show;
	if (showBorder) {
	if ((getStyle() & SWT.FLAT)!= 0) {
	BORDER_LEFT = BORDER_TOP = BORDER_RIGHT = BORDER_BOTTOM = 1;
	} else {
	BORDER_LEFT = BORDER_TOP = 1;
	BORDER_RIGHT = BORDER_BOTTOM = 3;
	}
	} else {
	BORDER_BOTTOM = BORDER_TOP = BORDER_LEFT = BORDER_RIGHT = 0;
	}

	layout();
	redraw();
	}
	/**
	* If true, the topCenter will always appear on a separate line by itself, otherwise the
	* topCenter will appear in the top row if there is room and will be moved to the second row if
	* required.
	*
	* @param show true if the topCenter will always appear on a separate line by itself
	*
	* @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 setTopCenterSeparate(boolean show) {
	checkWidget();
	separateTopCenter = show;
	layout();
	}

	}