| /******************************************************************************* |
| * Copyright (c) 2004, 2007 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.forms.widgets; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.widgets.*; |
| import org.eclipse.ui.forms.widgets.ILayoutExtension; |
| |
| /** |
| * A pagebook is a composite control where only a single control is visible at |
| * a time. It is similar to a notebook, but without tabs. |
| * <p> |
| * This class may be instantiated; it is not intended to be subclassed. |
| * </p> |
| */ |
| public class WrappedPageBook extends Composite { |
| class PageBookLayout extends Layout implements ILayoutExtension { |
| protected Point computeSize(Composite composite, int wHint, int hHint, |
| boolean flushCache) { |
| if (wHint != SWT.DEFAULT && hHint != SWT.DEFAULT) |
| return new Point(wHint, hHint); |
| Point result = null; |
| if (currentPage != null) { |
| result = currentPage.computeSize(wHint, hHint, flushCache); |
| } else { |
| result = new Point(0, 0); |
| } |
| return result; |
| } |
| protected void layout(Composite composite, boolean flushCache) { |
| if (currentPage != null) { |
| currentPage.setBounds(composite.getClientArea()); |
| } |
| } |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.forms.widgets.ILayoutExtension#computeMaximumWidth(org.eclipse.swt.widgets.Composite, |
| * boolean) |
| */ |
| public int computeMaximumWidth(Composite parent, boolean changed) { |
| return computeSize(parent, SWT.DEFAULT, SWT.DEFAULT, changed).x; |
| } |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.forms.widgets.ILayoutExtension#computeMinimumWidth(org.eclipse.swt.widgets.Composite, |
| * boolean) |
| */ |
| public int computeMinimumWidth(Composite parent, boolean changed) { |
| return computeSize(parent, 0, SWT.DEFAULT, changed).x; |
| } |
| } |
| /** |
| * The current control; <code>null</code> if none. |
| */ |
| private Control currentPage = null; |
| /** |
| * Creates a new empty pagebook. |
| * |
| * @param parent |
| * the parent composite |
| * @param style |
| * the SWT style bits |
| */ |
| public WrappedPageBook(Composite parent, int style) { |
| super(parent, style); |
| setLayout(new PageBookLayout()); |
| } |
| /** |
| * Shows the given page. This method has no effect if the given page is not |
| * contained in this pagebook. |
| * |
| * @param page |
| * the page to show |
| */ |
| public void showPage(Control page) { |
| if (page == currentPage) |
| return; |
| if (page.getParent() != this) |
| return; |
| Control oldPage = currentPage; |
| currentPage = page; |
| // show new page |
| if (page != null) { |
| if (!page.isDisposed()) { |
| //page.setVisible(true); |
| layout(true); |
| page.setVisible(true); |
| } |
| } |
| // hide old *after* new page has been made visible in order to avoid |
| // flashing |
| if (oldPage != null && !oldPage.isDisposed()) |
| oldPage.setVisible(false); |
| } |
| public Point computeSize(int wHint, int hHint, boolean changed) { |
| return ((PageBookLayout) getLayout()).computeSize(this, wHint, hHint, |
| changed); |
| } |
| } |