| /******************************************************************************* |
| * Copyright (c) 2006, 2018 The Pampered Chef, Inc. 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: |
| * The Pampered Chef, Inc. - initial API and implementation |
| * Brad Reynolds - bug 116920 |
| * Benjamin Cabe - bug 252219 |
| * Matthew Hall - bug 260329 |
| * Lars Vogel <Lars.Vogel@vogella.com> - Bug 434283, 529926 |
| ******************************************************************************/ |
| |
| package org.eclipse.jface.examples.databinding.snippets; |
| |
| import static org.eclipse.swt.events.SelectionListener.widgetSelectedAdapter; |
| |
| import org.eclipse.core.databinding.DataBindingContext; |
| import org.eclipse.core.databinding.beans.PojoProperties; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.jface.databinding.swt.DisplayRealm; |
| import org.eclipse.jface.databinding.swt.WidgetProperties; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Text; |
| |
| /** |
| * Hello, databinding. Bind changes in a GUI to a Model object but don't worry |
| * about propagating changes from the Model to the GUI. |
| * <p> |
| * Illustrates the basic Model-ViewModel-Binding-View architecture typically |
| * used in data binding applications. |
| */ |
| public class Snippet000HelloWorld { |
| public static void main(String[] args) { |
| Display display = new Display(); |
| final ViewModel viewModel = new ViewModel(); |
| |
| Realm.runWithDefault(DisplayRealm.getRealm(display), () -> { |
| final Shell shell = new View(viewModel).createShell(); |
| // The SWT event loop |
| Display display1 = Display.getCurrent(); |
| while (!shell.isDisposed()) { |
| if (!display1.readAndDispatch()) { |
| display1.sleep(); |
| } |
| } |
| }); |
| // Print the results |
| System.out.println("person.getName() = " |
| + viewModel.getPerson().getName()); |
| } |
| |
| // The data model class. This is normally a persistent class of some sort. |
| // |
| // In this example, we only push changes from the GUI to the model, so we |
| // don't worry about implementing JavaBeans bound properties. If we need |
| // our GUI to automatically reflect changes in the Person object, the |
| // Person object would need to implement the JavaBeans property change |
| // listener methods. |
| static class Person { |
| // A property... |
| String name = "HelloWorld"; |
| |
| public String getName() { |
| return name; |
| } |
| |
| public void setName(String name) { |
| this.name = name; |
| } |
| |
| @Override |
| public String toString() { |
| return name; |
| } |
| } |
| |
| // The View's model--the root of our Model graph for this particular GUI. |
| // |
| // Typically each View class has a corresponding ViewModel class. |
| // The ViewModel is responsible for getting the objects to edit from the |
| // DAO. Since this snippet doesn't have any persistent objects to |
| // retrieve, this ViewModel just instantiates a model object to edit. |
| static class ViewModel { |
| // The model to bind |
| private Person person = new Person(); |
| |
| public Person getPerson() { |
| return person; |
| } |
| } |
| |
| // The GUI view |
| static class View { |
| private ViewModel viewModel; |
| private Text name; |
| private Person person; |
| |
| public View(ViewModel viewModel) { |
| this.viewModel = viewModel; |
| } |
| |
| public Shell createShell() { |
| Display display = Display.getDefault(); |
| Shell shell = new Shell(display); |
| shell.setLayout(new GridLayout(1, false)); |
| name = new Text(shell, SWT.BORDER); |
| Button button = new Button(shell, SWT.PUSH); |
| button.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false)); |
| button.setText("Print to console"); |
| button.addSelectionListener(widgetSelectedAdapter(e -> System.out.println(person))); |
| |
| DataBindingContext bindingContext = new DataBindingContext(); |
| person = viewModel.getPerson(); |
| |
| bindingContext.bindValue( |
| WidgetProperties.text(SWT.Modify).observe(name), |
| PojoProperties.value("name").observe(person)); |
| |
| // Open and return the Shell |
| shell.pack(); |
| shell.open(); |
| return shell; |
| } |
| } |
| |
| } |