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vogellavogella
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Adds databinding example
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‎com.vogella.rcp.databinding/META-INF/MANIFEST.MF‎

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Manifest-Version: 1.0
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Bundle-ManifestVersion: 2
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Bundle-Name: Databinding
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Bundle-SymbolicName: com.vogella.rcp.databinding;singleton:=true
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Bundle-Version: 1.0.0.qualifier
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Bundle-Vendor: VOGELLA
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Require-Bundle: javax.inject;bundle-version="0.0.0",
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org.eclipse.core.runtime;bundle-version="0.0.0",
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org.eclipse.swt;bundle-version="0.0.0",
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org.eclipse.e4.ui.model.workbench;bundle-version="0.0.0",
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org.eclipse.jface;bundle-version="0.0.0",
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org.eclipse.e4.ui.services;bundle-version="0.0.0",
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org.eclipse.e4.ui.workbench;bundle-version="0.0.0",
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org.eclipse.e4.core.di;bundle-version="0.0.0",
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org.eclipse.e4.ui.di;bundle-version="0.0.0",
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org.eclipse.e4.core.contexts;bundle-version="0.0.0",
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org.eclipse.core.databinding;bundle-version="1.6.0",
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org.eclipse.core.databinding.beans;bundle-version="1.3.0",
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org.eclipse.core.databinding.property;bundle-version="1.6.0",
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org.eclipse.jface.databinding;bundle-version="1.8.0"
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Bundle-RequiredExecutionEnvironment: JavaSE-1.8

‎com.vogella.rcp.databinding/plugin.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<?eclipse version="3.4"?>
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<plugin>
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<extension
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id="product"
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point="org.eclipse.core.runtime.products">
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<product
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name="com.vogella.rcp.databinding"
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application="org.eclipse.e4.ui.workbench.swt.E4Application">
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<property
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name="applicationCSS"
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value="platform:/plugin/com.vogella.rcp.databinding/css/default.css">
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</property>
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<property
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name="appName"
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value="com.vogella.rcp.databinding">
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</property>
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</product>
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</extension>
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</plugin>

‎com.vogella.rcp.databinding/src/com/vogella/rcp/databinding/parts/ModelObject.java‎

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package com.vogella.rcp.databinding.parts;
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import java.beans.PropertyChangeListener;
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import java.beans.PropertyChangeSupport;
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public class ModelObject {
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private final PropertyChangeSupport changeSupport = new PropertyChangeSupport(this);
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public void addPropertyChangeListener(PropertyChangeListener listener) {
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changeSupport.addPropertyChangeListener(listener);
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}
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public void removePropertyChangeListener(PropertyChangeListener listener) {
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changeSupport.removePropertyChangeListener(listener);
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}
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protected void firePropertyChange(String propertyName, Object oldValue, Object newValue) {
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changeSupport.firePropertyChange(propertyName, oldValue, newValue);
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}
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}

‎com.vogella.rcp.databinding/src/com/vogella/rcp/databinding/parts/Person.java‎

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package com.vogella.rcp.databinding.parts;
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public class Person extends ModelObject {
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private String name;
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private String[] programmingSkills;
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public String getName() {
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return name;
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}
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public void setName(String name) {
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firePropertyChange("name", this.name, this.name = name);
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}
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public String[] getProgrammingSkills() {
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return programmingSkills;
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}
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public void setProgrammingSkills(String[] programmingSkills) {
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firePropertyChange("programmingSkills", this.programmingSkills,
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this.programmingSkills = programmingSkills);
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}
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}

‎com.vogella.rcp.databinding/src/com/vogella/rcp/databinding/parts/SamplePart.java‎

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package com.vogella.rcp.databinding.parts;
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import javax.annotation.PostConstruct;
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import org.eclipse.core.databinding.DataBindingContext;
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import org.eclipse.core.databinding.UpdateValueStrategy;
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import org.eclipse.core.databinding.beans.BeanProperties;
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import org.eclipse.core.databinding.conversion.IConverter;
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import org.eclipse.core.databinding.observable.value.IObservableValue;
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import org.eclipse.jface.databinding.swt.WidgetProperties;
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import org.eclipse.jface.layout.GridDataFactory;
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import org.eclipse.jface.layout.GridLayoutFactory;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.events.SelectionAdapter;
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import org.eclipse.swt.events.SelectionEvent;
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import org.eclipse.swt.layout.GridData;
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import org.eclipse.swt.widgets.Button;
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import org.eclipse.swt.widgets.Composite;
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import org.eclipse.swt.widgets.Label;
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import org.eclipse.swt.widgets.Text;
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public class SamplePart {
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@PostConstruct
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@SuppressWarnings("unchecked")
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public void createPartControl(Composite parent) {
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// create the Person model with programming skills
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Person person = new Person();
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person.setName("John");
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person.setProgrammingSkills(new String[] { "Java", "JavaScript", "Groovy" });
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GridLayoutFactory.swtDefaults().numColumns(2).applyTo(parent);
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Label programmingSkillsLabel = new Label(parent, SWT.NONE);
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programmingSkillsLabel.setText("Programming Skills");
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GridDataFactory.swtDefaults().applyTo(programmingSkillsLabel);
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Text programmingSkillsText = new Text(parent, SWT.BORDER);
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GridDataFactory.fillDefaults().grab(true, false).applyTo(programmingSkillsText);
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// Do the actual binding and conversion
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DataBindingContext dbc = new DataBindingContext();
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// define converters
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IConverter convertToStringArray =
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IConverter.create(String.class, String[].class, (o1) -> ((String) o1).split(","));
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IConverter convertToString =
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IConverter.create(String[].class, String.class, (o1) -> convert((String[])o1));;
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// create the observables, which should be bound
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IObservableValue<Text> programmingSkillsTarget = WidgetProperties.text(SWT.Modify).observe(programmingSkillsText);
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IObservableValue<Person> programmingSkillsModel = BeanProperties.value("programmingSkills").observe(person);
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// bind observables together with the appropriate UpdateValueStrategies
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dbc.bindValue(programmingSkillsTarget, programmingSkillsModel,
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UpdateValueStrategy.create(convertToStringArray),
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UpdateValueStrategy.create(convertToString));
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// button to check the data model
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Button button = new Button(parent, SWT.PUSH);
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button.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false));
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button.setText("Show data model");
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button.addSelectionListener(new SelectionAdapter() {
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@Override
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public void widgetSelected(SelectionEvent e) {
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for (String string : person.getProgrammingSkills()) {
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System.out.println(string);
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}
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}
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});
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}
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private static String convert(String[] fromObject) {
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String[] stringArray = fromObject;
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StringBuilder sb = new StringBuilder();
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int length = stringArray.length;
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for (int i = 0; i < length; i++) {
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String string = stringArray[i];
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sb.append(string);
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if (i + 1 < length) {
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sb.append(",");
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}
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}
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return sb.toString();
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}
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}

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