/******************************************************************************* * Copyright (c) 2000, 2006 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 com.surelogic.common.eclipse; //package org.eclipse.ui.part; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Layout; /** * 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. *
* This class may be instantiated; it is not intended to be subclassed. *
*
* Note that although this class is a subclass of Composite
, it
* does not make sense to set a layout on it.
*
* [Issue: This class should be declared private.] *
*/ public class PageBookLayout extends Layout { 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 { //Rectangle rect= composite.getClientArea(); //result= new Point(rect.width, rect.height); result = new Point(0, 0); } if (wHint != SWT.DEFAULT) { result.x = wHint; } if (hHint != SWT.DEFAULT) { result.y = hHint; } return result; } protected void layout(Composite composite, boolean flushCache) { if (currentPage != null) { currentPage.setBounds(composite.getClientArea()); } } } /** * The current control;null
if none.
*/
private Control currentPage = null;
/**
* Gets the current page being shown, or null
if none.
*
* @return the page being shown, or null
if none.
*/
public Control getPage() {
return currentPage;
}
/**
* Creates a new empty pagebook.
*
* @param parent
* the parent composite
* @param style
* the SWT style bits
*/
public PageBook(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);
// if (fRequestFocusOnShowPage)
// page.setFocus();
}
}
// hide old *after* new page has been made visible in order to avoid flashing
if (oldPage != null && !oldPage.isDisposed()) {
oldPage.setVisible(false);
}
}
}