SamplePart.java

package com.vogella.e4.selectionservice.parts;

import javax.annotation.PostConstruct;
import javax.inject.Inject;

import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.ui.di.Focus;
import org.eclipse.e4.ui.di.Persist;
import org.eclipse.e4.ui.model.application.ui.MDirtyable;
import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;

import com.vogella.e4.selectionservice.service.MySelectionService;

public class SamplePart {

	private Text txtInput;
	private TableViewer tableViewer;

	@Inject
	private MDirtyable dirty;
	private MySelectionService service;

	@PostConstruct
	public void createComposite(Composite parent) {
		parent.setLayout(new GridLayout(1, false));

		txtInput = new Text(parent, SWT.BORDER);
		txtInput.setMessage("Enter text to mark part as dirty");
		txtInput.addModifyListener(new ModifyListener() {
			@Override
			public void modifyText(ModifyEvent e) {
				dirty.setDirty(true);
				System.out.println(service.toString());
				service.setSelection(txtInput.getText());
			}
		});
		txtInput.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		tableViewer = new TableViewer(parent);

		tableViewer.add("Sample item 1");
		tableViewer.add("Sample item 2");
		tableViewer.add("Sample item 3");
		tableViewer.add("Sample item 4");
		tableViewer.add("Sample item 5");
		tableViewer.getTable().setLayoutData(new GridData(GridData.FILL_BOTH));
	}

	@Inject @Optional 
	public void setSelectionService(MySelectionService service) {
		System.out.println("Selection service set");
		if (service != null){
			this.service = service;
			
		} else {
			System.out.println("Service is null");
		}
	}

	@Focus
	public void setFocus() {
		tableViewer.getTable().setFocus();
	}

	@Persist
	public void save() {
		dirty.setDirty(false);
	}
}