bundles/workspace/org.eclipse.apogy.workspace.ui/src/org/eclipse/apogy/workspace/ui/composites/RegisteredProjectsListComposite.java

/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency 
 * 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:  
 *     Regent L'Archeveque  - initial API and implementation
 *
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/
package org.eclipse.apogy.workspace.ui.composites;

import java.util.List;

import org.eclipse.apogy.workspace.ProjectProvidersRegistry;
import org.eclipse.apogy.workspace.ui.wizards.ImportRegisteredProjectWizard;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.conversion.Converter;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.resources.IProject;
import org.eclipse.jface.databinding.swt.WidgetProperties;
import org.eclipse.jface.databinding.viewers.ViewerProperties;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ColumnViewerToolTipSupport;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.wizard.IWizard;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.osgi.framework.Bundle;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class RegisteredProjectsListComposite extends Composite {
	private static final Logger Logger = LoggerFactory.getLogger(RegisteredProjectsListComposite.class);

	private TableViewer viewer;
	private Button btnImport;
	private DataBindingContext m_bindingContext;

	public RegisteredProjectsListComposite(Composite parent, int style) {
		super(parent, style);
		setLayout(new GridLayout(2, false));
		addDisposeListener(new DisposeListener() {

			@Override
			public void widgetDisposed(DisposeEvent e) {
				if (RegisteredProjectsListComposite.this.m_bindingContext != null) {
					RegisteredProjectsListComposite.this.m_bindingContext.dispose();
				}
			}
		});

		this.viewer = new TableViewer(this, SWT.BORDER | SWT.SINGLE | SWT.V_SCROLL);
		Table table = this.viewer.getTable();
		table.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 2));
		table.setLinesVisible(true);
		ColumnViewerToolTipSupport.enableFor(this.viewer);
		this.viewer.addSelectionChangedListener(new ISelectionChangedListener() {

			@Override
			public void selectionChanged(SelectionChangedEvent event) {
				newSelection(event.getSelection());
			}
		});

		TableViewerColumn tableViewerColumnItem_Name = new TableViewerColumn(this.viewer, SWT.NONE);
		TableColumn trclmnItemName = tableViewerColumnItem_Name.getColumn();
		trclmnItemName.setWidth(200);

		this.btnImport = new Button(this, SWT.NONE);
		this.btnImport.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent event) {
				try {
					IWizard wizard = new ImportRegisteredProjectWizard(getSelectedBundle());
					new WizardDialog(parent.getShell(), wizard).open();
				} catch (Exception e) {
					Logger.error("Unable to import the project <" + getSelectedBundle().getSymbolicName() + ">.", e);
				}
			}
		});
		this.btnImport.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false, 1, 1));
		this.btnImport.setText("Import");
		new Label(this, SWT.NONE);

		this.viewer.setContentProvider(ArrayContentProvider.getInstance());
		this.viewer.setLabelProvider(new LabelProvider() {
			@Override
			public String getText(Object element) {
				Bundle bundle = (Bundle) element;
				return bundle.getSymbolicName();
			}
		});
		this.viewer.setInput(ProjectProvidersRegistry.INSTANCE.getApogyProjectProviders().toArray());
		this.m_bindingContext = customInitDataBindings();

		// Dispose
		addDisposeListener(new DisposeListener() {
			@Override
			public void widgetDisposed(DisposeEvent e) {
				if (RegisteredProjectsListComposite.this.m_bindingContext != null)
					RegisteredProjectsListComposite.this.m_bindingContext.dispose();

			}
		});
	}

	public void setApogyProjectProviders(List<Bundle> bundles) {
	}

	/**
	 * This method is invoked a when a new selection is selected.
	 */
	protected void newSelection(ISelection selection) {
	}

	/**
	 * Returns the selected {@link IProject}.
	 * 
	 * @return Reference to the project or null if no project is selected.
	 */
	public Bundle getSelectedBundle() {
		return (Bundle) ((IStructuredSelection) this.viewer.getSelection()).getFirstElement();
	}

	protected DataBindingContext customInitDataBindings() {
		DataBindingContext bindingContext = new DataBindingContext();

		/* Import Button Enabled. */
		IObservableValue<?> observeEnabledBtnImportObserveWidget = WidgetProperties.enabled().observe(this.btnImport);
		IObservableValue<?> observeSingleSelectionViewer = ViewerProperties.singleSelection().observe(this.viewer);
		bindingContext.bindValue(observeEnabledBtnImportObserveWidget, observeSingleSelectionViewer,
				new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER),
				new UpdateValueStrategy(UpdateValueStrategy.POLICY_UPDATE)
						.setConverter(new Converter(Bundle.class, Boolean.class) {
							@Override
							public Object convert(Object fromObject) {
								return fromObject != null;
							}
						}));
		//
		return bindingContext;
	}
}