TagOverviewPart

package com.example.e4.rcp.todo.parts;

import java.util.Map;

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

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.ui.di.UIEventTopic;
import org.eclipse.e4.ui.di.UISynchronize;
import org.eclipse.e4.ui.dialogs.filteredtree.FilteredTree;
import org.eclipse.e4.ui.dialogs.filteredtree.PatternFilter;
import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
import org.eclipse.jface.databinding.viewers.ObservableListTreeContentProvider;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TreeViewerColumn;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;

import com.example.e4.rcp.todo.databinding.DelegatingDescriptionProperty;
import com.example.e4.rcp.todo.databinding.DelegatingLabelProperty;
import com.example.e4.rcp.todo.databinding.DelegatingObservableCellLabelProvider;
import com.example.e4.rcp.todo.databinding.TagTreeListProperty;
import com.example.e4.rcp.todo.events.MyEventConstants;
import com.example.e4.rcp.todo.model.ITodoService;
import com.example.e4.rcp.todo.model.Tag;
import com.example.e4.rcp.todo.model.Todo;

public class TagOverviewPart {
	
	@Inject
	private ITodoService todoService;

	private FilteredTree filteredTree;

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

		Button button = new Button(parent, SWT.PUSH);
		button.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				// update the table content, whenever the button is pressed
				filteredTree.getViewer().setInput(todoService.getRootTag());
			}
		});
		button.setText("Load Data");
		
		filteredTree = new FilteredTree(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER,
				new PatternFilter());
		filteredTree.getViewer().getTree().setHeaderVisible(true);

		ObservableListTreeContentProvider observableContentProvider = new ObservableListTreeContentProvider(
				new TagTreeListProperty().listFactory(), null);
		filteredTree.getViewer().setContentProvider(observableContentProvider);
		filteredTree.getViewer().addSelectionChangedListener(new ISelectionChangedListener() {

			@Override
			public void selectionChanged(SelectionChangedEvent event) {
			    // propagate the selection later
			}
		});

		TreeViewerColumn labelViewerColumn = new TreeViewerColumn(filteredTree.getViewer(), SWT.NONE);
		labelViewerColumn.getColumn().setWidth(200);
		labelViewerColumn.getColumn().setText("Label");

		DelegatingLabelProperty labelProperty = new DelegatingLabelProperty();
		labelViewerColumn.setLabelProvider(
				new DelegatingObservableCellLabelProvider(observableContentProvider.getKnownElements(), labelProperty));

		TreeViewerColumn descriptionViewerColumn = new TreeViewerColumn(filteredTree.getViewer(), SWT.NONE);
		descriptionViewerColumn.getColumn().setWidth(200);
		descriptionViewerColumn.getColumn().setText("Description");

		DelegatingDescriptionProperty descriptionProperty = new DelegatingDescriptionProperty();
		descriptionViewerColumn.setLabelProvider(new DelegatingObservableCellLabelProvider(
				observableContentProvider.getKnownElements(), descriptionProperty));

		filteredTree.getViewer().setInput(todoService.getRootTag());
	}
}