bundles/addons/org.eclipse.apogy.addons.ui/src/org/eclipse/apogy/addons/ui/composites/SimpleToolsDetailsComposite.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:
 *     Pierre Allard - initial API and implementation
 *     Regent L'Archeveque
 * 
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/
package org.eclipse.apogy.addons.ui.composites;

import org.eclipse.apogy.addons.ApogyAddonsPackage;
import org.eclipse.apogy.addons.SimpleTool;
import org.eclipse.apogy.common.emf.transaction.ApogyCommonTransactionFacade;
import org.eclipse.apogy.common.emf.ui.emfforms.ApogyCommonEMFUiEMFFormsFacade;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.emf.databinding.EMFProperties;
import org.eclipse.emf.databinding.FeaturePath;
import org.eclipse.jface.databinding.swt.WidgetProperties;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
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.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

	private final Button btnActivate;
	private final Button btnDeactivate;
	private final Composite compositeDetails;

	private DataBindingContext m_bindingContext;

	private SimpleTool simpleTool;

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

		this.btnActivate = new Button(this, SWT.NONE);
		this.btnActivate.setText("Activate");
		this.btnActivate.setEnabled(false);
		this.btnActivate.addSelectionListener(new SelectionListener() {

			@Override
			public void widgetSelected(SelectionEvent e) {
				if (getSimpleTool() != null) {
					ApogyCommonTransactionFacade.INSTANCE.basicSet(getSimpleTool(),
							ApogyAddonsPackage.Literals.SIMPLE_TOOL__ACTIVE, true);
				}
			}

			@Override
			public void widgetDefaultSelected(SelectionEvent e) {
			}
		});

		this.btnDeactivate = new Button(this, SWT.NONE);
		this.btnDeactivate.setText("De-Activate");
		this.btnDeactivate.setEnabled(false);
		this.btnDeactivate.addSelectionListener(new SelectionListener() {

			@Override
			public void widgetSelected(SelectionEvent e) {
				if (getSimpleTool() != null) {
					ApogyCommonTransactionFacade.INSTANCE.basicSet(getSimpleTool(),
							ApogyAddonsPackage.Literals.SIMPLE_TOOL__ACTIVE, false);
				}
			}

			@Override
			public void widgetDefaultSelected(SelectionEvent e) {
			}
		});

		this.compositeDetails = new Composite(this, SWT.BORDER);
		this.compositeDetails.setLayout(new GridLayout());
		GridData gd_compositeDetails = new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1);
		gd_compositeDetails.minimumWidth = 400;
		gd_compositeDetails.widthHint = 400;
		this.compositeDetails.setLayoutData(gd_compositeDetails);
		this.compositeDetails.layout();

		this.m_bindingContext = customInitDataBindings();

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

			}
		});
	}

	public SimpleTool getSimpleTool() {
		return this.simpleTool;
	}

	public void setSimpleTool(SimpleTool simpleTool) {
		// Dispose of current bindings if applicable.
		if (this.m_bindingContext != null) {
			this.m_bindingContext.dispose();
		}

		this.simpleTool = simpleTool;

		if (simpleTool != null) {
			// Updates bindings
			this.m_bindingContext = customInitDataBindings();

			try {
				ApogyCommonEMFUiEMFFormsFacade.INSTANCE.createEMFForms(this.compositeDetails, simpleTool);
			} catch (Throwable t) {
				Logger.error(t.getMessage(), t);
			}
		}
	}

	@SuppressWarnings("unchecked")
	protected DataBindingContext customInitDataBindings() {
		DataBindingContext bindingContext = new DataBindingContext();

		IObservableValue<?> simpleToolObservable = EMFProperties
				.value(FeaturePath.fromList(ApogyAddonsPackage.Literals.SIMPLE_TOOL__ACTIVE)).observe(getSimpleTool());

		/* Activate Button Enabled Binding. */
		IObservableValue<?> observeEnabledBtnActivateWidget = WidgetProperties.enabled().observe(this.btnActivate);
		UpdateValueStrategy btnActivateEnableStrategy = new UpdateValueStrategy(UpdateValueStrategy.POLICY_UPDATE) {
			@Override
			public Object convert(Object value) {
				return !((Boolean) value).booleanValue();
			}
		};

		bindingContext.bindValue(observeEnabledBtnActivateWidget, simpleToolObservable,
				new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), btnActivateEnableStrategy);

		/* Activate Button Enabled Binding. */
		IObservableValue<?> observeEnabledBtnDectivateWidget = WidgetProperties.enabled().observe(this.btnDeactivate);
		UpdateValueStrategy btnDeactivateEnableStrategy = new UpdateValueStrategy();
		bindingContext.bindValue(observeEnabledBtnDectivateWidget, simpleToolObservable,
				new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), btnDeactivateEnableStrategy);

		return bindingContext;
	}
}