Java tutorial
/******************************************************************************* * Copyright (c) 2013 Atlanmod INRIA LINA Mines Nantes * 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: * Atlanmod INRIA LINA Mines Nantes - initial API and implementation *******************************************************************************/ package fr.inria.atlanmod.neo4emf.neo4jresolver.wizards; import java.util.ArrayList; import java.util.List; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.Path; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.CheckStateChangedEvent; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ICheckStateListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.Text; import fr.inria.atlanmod.neo4emf.neo4jresolver.providers.Neo4jRuntimeInstallerLabelProvider; import fr.inria.atlanmod.neo4emf.neo4jresolver.runtimes.AbstractNeo4jRuntimeInstaller; import fr.inria.atlanmod.neo4emf.neo4jresolver.runtimes.INeo4jRuntime; import fr.inria.atlanmod.neo4emf.neo4jresolver.runtimes.INeo4jRuntimeListener; import fr.inria.atlanmod.neo4emf.neo4jresolver.runtimes.internal.Neo4JRuntimesManager; /** * @author abelgomez * */ public class AvailableNeo4jRuntimesWizardPage extends WizardPage { private InstallRuntimesWizardData data; private List<AbstractNeo4jRuntimeInstaller> installers; private CheckboxTableViewer viewer; private Text descText; INeo4jRuntimeListener listener = new INeo4jRuntimeListener() { @Override public void notifyChange(Event event) { final AbstractNeo4jRuntimeInstaller source = event.getSource(); getShell().getDisplay().asyncExec(new Runnable() { @Override public void run() { if (viewer != null && !viewer.getTable().isDisposed()) { if (viewer.getSelection() instanceof IStructuredSelection) { IStructuredSelection selection = (IStructuredSelection) viewer.getSelection(); if (selection.getFirstElement() != null) { AbstractNeo4jRuntimeInstaller installer = (AbstractNeo4jRuntimeInstaller) selection .getFirstElement(); if (source.equals(installer) && descText != null && !descText.isDisposed()) { descText.setText(installer.getDescription()); } } } } } }); } }; public AvailableNeo4jRuntimesWizardPage(InstallRuntimesWizardData data) { super(AvailableNeo4jRuntimesWizardPage.class.getName(), "Install Neo4J runtime Libraries", null); setDescription("Available Neo4J Runtimes to Install"); this.data = data; computeInstallers(); addInstallersListeners(); } private void computeInstallers() { installers = new ArrayList<AbstractNeo4jRuntimeInstaller>(); List<IPath> installedRuntimes = new ArrayList<IPath>(); for (INeo4jRuntime runtime : Neo4JRuntimesManager.INSTANCE.getRuntimes()) { installedRuntimes.add(new Path(runtime.getVersion()).append(runtime.getId())); } for (AbstractNeo4jRuntimeInstaller installer : Neo4JRuntimesManager.INSTANCE.getInstallers()) { if (!installedRuntimes.contains(new Path(installer.getVersion()).append(installer.getId()))) { installers.add(installer); } } } private void addInstallersListeners() { for (AbstractNeo4jRuntimeInstaller installer : installers) { installer.addChangeListener(listener); } } private void removeInstallersListeners() { for (AbstractNeo4jRuntimeInstaller installer : installers) { installer.removeChangeListener(listener); } } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite) */ @Override public void createControl(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); composite.setLayout(new GridLayout()); Table table = new Table(composite, SWT.BORDER | SWT.CHECK); GridData tableLayoutData = new GridData(SWT.FILL, SWT.FILL, true, true); tableLayoutData.heightHint = 150; table.setLayoutData(tableLayoutData); viewer = new CheckboxTableViewer(table); viewer.setContentProvider(new ArrayContentProvider()); viewer.setLabelProvider(new Neo4jRuntimeInstallerLabelProvider()); viewer.setInput(installers); viewer.addCheckStateListener(new ICheckStateListener() { @Override public void checkStateChanged(CheckStateChangedEvent event) { AbstractNeo4jRuntimeInstaller installer = (AbstractNeo4jRuntimeInstaller) event.getElement(); if (event.getChecked()) { data.getInstallersToInstall().add(installer); } else { data.getInstallersToInstall().remove(installer); } setPageComplete(!data.getInstallersToInstall().isEmpty()); } }); viewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { if (!event.getSelection().isEmpty() && event.getSelection() instanceof IStructuredSelection) { IStructuredSelection selection = (IStructuredSelection) event.getSelection(); AbstractNeo4jRuntimeInstaller installer = (AbstractNeo4jRuntimeInstaller) selection .getFirstElement(); descText.setText(installer.getDescription()); } else { descText.setText(""); } } }); Label descLabel = new Label(composite, SWT.NONE); descLabel.setText("Description"); descText = new Text(composite, SWT.BORDER | SWT.WRAP | SWT.MULTI); GridData textLayoutData = new GridData(SWT.FILL, SWT.END, true, false); textLayoutData.heightHint = 60; descText.setLayoutData(textLayoutData); descText.setEditable(false); checkCanInstallSomething(); setPageComplete(false); setControl(composite); } private void checkCanInstallSomething() { if (installers.isEmpty()) { viewer.getTable().setEnabled(false); setErrorMessage("No additional runtimes can be installed"); } } @Override public void setVisible(boolean visible) { super.setVisible(visible); if (viewer != null && !viewer.getTable().isDisposed()) { viewer.refresh(); if (viewer.getElementAt(0) != null) { viewer.setSelection(new StructuredSelection(viewer.getElementAt(0))); } } } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.DialogPage#dispose() */ @Override public void dispose() { removeInstallersListeners(); super.dispose(); } }