Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2011 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 ext.org.eclipse.jdt.internal.ui.wizards.buildpaths; import org.eclipse.swt.widgets.Shell; import org.eclipse.core.runtime.CoreException; import org.eclipse.jface.layout.PixelConverter; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.wizard.IWizardPage; import org.eclipse.jface.wizard.Wizard; import org.eclipse.jface.wizard.WizardDialog; import org.eclipse.jdt.core.IClasspathEntry; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.ui.wizards.IClasspathContainerPage; import org.eclipse.jdt.ui.wizards.IClasspathContainerPageExtension; import org.eclipse.jdt.ui.wizards.IClasspathContainerPageExtension2; import ext.org.eclipse.jdt.internal.ui.util.ExceptionHandler; import ext.org.eclipse.jdt.internal.ui.wizards.NewWizardMessages; /** */ public class ClasspathContainerWizard extends Wizard { private final ClasspathContainerDescriptor fPageDesc; private final IClasspathEntry fEntryToEdit; private IClasspathEntry[] fNewEntries; private IClasspathContainerPage fContainerPage; private final IJavaProject fCurrProject; private final IClasspathEntry[] fCurrClasspath; private ClasspathContainerSelectionPage fSelectionWizardPage; /** * Constructor for ClasspathContainerWizard. * @param entryToEdit entry to edit * @param currProject current project * @param currEntries entries currently in classpath */ public ClasspathContainerWizard(IClasspathEntry entryToEdit, IJavaProject currProject, IClasspathEntry[] currEntries) { this(entryToEdit, null, currProject, currEntries); } /** * Constructor for ClasspathContainerWizard. * @param pageDesc page description * @param currProject current project * @param currEntries entries currently in classpath */ public ClasspathContainerWizard(ClasspathContainerDescriptor pageDesc, IJavaProject currProject, IClasspathEntry[] currEntries) { this(null, pageDesc, currProject, currEntries); } private ClasspathContainerWizard(IClasspathEntry entryToEdit, ClasspathContainerDescriptor pageDesc, IJavaProject currProject, IClasspathEntry[] currEntries) { fEntryToEdit = entryToEdit; fPageDesc = pageDesc; fNewEntries = null; fCurrProject = currProject; fCurrClasspath = currEntries; String title; if (entryToEdit == null) { title = NewWizardMessages.ClasspathContainerWizard_new_title; } else { title = NewWizardMessages.ClasspathContainerWizard_edit_title; } setWindowTitle(title); } public IClasspathEntry[] getNewEntries() { return fNewEntries; } /* (non-Javadoc) * @see IWizard#performFinish() */ @Override public boolean performFinish() { if (fContainerPage != null) { if (fContainerPage.finish()) { if (fEntryToEdit == null && fContainerPage instanceof IClasspathContainerPageExtension2) { fNewEntries = ((IClasspathContainerPageExtension2) fContainerPage).getNewContainers(); } else { IClasspathEntry entry = fContainerPage.getSelection(); fNewEntries = (entry != null) ? new IClasspathEntry[] { entry } : null; } return true; } } return false; } /* (non-Javadoc) * @see IWizard#addPages() */ @Override public void addPages() { if (fPageDesc != null) { fContainerPage = getContainerPage(fPageDesc); addPage(fContainerPage); } else if (fEntryToEdit == null) { // new entry: show selection page as first page ClasspathContainerDescriptor[] containers = ClasspathContainerDescriptor.getDescriptors(); fSelectionWizardPage = new ClasspathContainerSelectionPage(containers); addPage(fSelectionWizardPage); // add as dummy, will not be shown fContainerPage = new ClasspathContainerDefaultPage(); addPage(fContainerPage); } else { // fPageDesc == null && fEntryToEdit != null ClasspathContainerDescriptor[] containers = ClasspathContainerDescriptor.getDescriptors(); ClasspathContainerDescriptor descriptor = findDescriptorPage(containers, fEntryToEdit); fContainerPage = getContainerPage(descriptor); addPage(fContainerPage); } super.addPages(); } private IClasspathContainerPage getContainerPage(ClasspathContainerDescriptor pageDesc) { IClasspathContainerPage containerPage = null; if (pageDesc != null) { IClasspathContainerPage page = pageDesc.getPage(); if (page != null) { return page; // if page is already created, avoid double initialization } try { containerPage = pageDesc.createPage(); } catch (CoreException e) { handlePageCreationFailed(e); } } if (containerPage == null) { containerPage = new ClasspathContainerDefaultPage(); if (pageDesc != null) { pageDesc.setPage(containerPage); // avoid creation next time } } if (containerPage instanceof IClasspathContainerPageExtension) { ((IClasspathContainerPageExtension) containerPage).initialize(fCurrProject, fCurrClasspath); } containerPage.setSelection(fEntryToEdit); containerPage.setWizard(this); return containerPage; } /* (non-Javadoc) * @see IWizard#getNextPage(IWizardPage) */ @Override public IWizardPage getNextPage(IWizardPage page) { if (page == fSelectionWizardPage) { ClasspathContainerDescriptor selected = fSelectionWizardPage.getSelected(); fContainerPage = getContainerPage(selected); return fContainerPage; } return super.getNextPage(page); } private void handlePageCreationFailed(CoreException e) { String title = NewWizardMessages.ClasspathContainerWizard_pagecreationerror_title; String message = NewWizardMessages.ClasspathContainerWizard_pagecreationerror_message; ExceptionHandler.handle(e, getShell(), title, message); } private ClasspathContainerDescriptor findDescriptorPage(ClasspathContainerDescriptor[] containers, IClasspathEntry entry) { for (int i = 0; i < containers.length; i++) { if (containers[i].canEdit(entry)) { return containers[i]; } } return null; } /* (non-Javadoc) * @see org.eclipse.jface.wizard.Wizard#dispose() */ @Override public void dispose() { if (fSelectionWizardPage != null) { ClasspathContainerDescriptor[] descriptors = fSelectionWizardPage.getContainers(); for (int i = 0; i < descriptors.length; i++) { descriptors[i].dispose(); } } super.dispose(); } /* (non-Javadoc) * @see IWizard#canFinish() */ @Override public boolean canFinish() { if (fSelectionWizardPage != null) { if (!fContainerPage.isPageComplete()) { return false; } } if (fContainerPage != null) { return fContainerPage.isPageComplete(); } return false; } public static int openWizard(Shell shell, ClasspathContainerWizard wizard) { WizardDialog dialog = new WizardDialog(shell, wizard); PixelConverter converter = new PixelConverter(JFaceResources.getDialogFont()); dialog.setMinimumPageSize(converter.convertWidthInCharsToPixels(70), converter.convertHeightInCharsToPixels(20)); dialog.create(); return dialog.open(); } }