bundles/common/org.eclipse.apogy.common.topology.addons.dynamics.ui/src/org/eclipse/apogy/common/topology/addons/dynamics/ui/composites/GearRatioConstraintComposite.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,
 *     Regent L'Archeveque, 
 *     Sebastien Gemme - initial API and implementation
 * SPDX-License-Identifier: EPL-1.0
 *     
 *******************************************************************************/
package org.eclipse.apogy.common.topology.addons.dynamics.ui.composites;

import java.text.DecimalFormat;

import org.eclipse.apogy.common.databinding.converters.DoubleToStringConverter;
import org.eclipse.apogy.common.topology.addons.dynamics.ApogyCommonTopologyAddonsDynamicsPackage.Literals;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.beans.PojoProperties;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.emf.databinding.EMFProperties;
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.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.Text;

public class GearRatioConstraintComposite extends Composite {

	private DataBindingContext m_bindingContext;
	private org.eclipse.apogy.common.topology.addons.dynamics.GearRatioConstraint gearRatioConstraint;
	private final Button enabledButton;
	private final Text forceText;

	public GearRatioConstraintComposite(Composite parent, int style,
			org.eclipse.apogy.common.topology.addons.dynamics.GearRatioConstraint newGearRatioConstraint) {
		this(parent, style);
		setGearRatioConstraint(newGearRatioConstraint);
	}

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

		new Label(this, SWT.NONE).setText("Enabled:");

		this.enabledButton = new Button(this, SWT.CHECK);
		this.enabledButton.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

		new Label(this, SWT.NONE).setText("Force:");

		this.forceText = new Text(this, SWT.NONE);
		this.forceText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

		if (this.gearRatioConstraint != null) {
			this.m_bindingContext = initDataBindings();
		}

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

	@Override
	protected void checkSubclass() {
		// Disable the check that prevents subclassing of SWT components
	}

	@SuppressWarnings({ "unchecked", "rawtypes" })
	private DataBindingContext initDataBindings() {
		DataBindingContext bindingContext = new DataBindingContext();

		// Enabled
		IObservableValue enabledObserveWidget = WidgetProperties.selection().observe(this.enabledButton);
		IObservableValue enabledObserveValue = EMFProperties.value(Literals.ABSTRACT_CONSTRAINT__ENABLED)
				.observe(this.gearRatioConstraint);

		bindingContext.bindValue(enabledObserveWidget, enabledObserveValue, null, null);

		// Force
		IObservableValue forceObserveWidget = PojoProperties.value("text").observe(this.forceText);
		IObservableValue forceObserveValue = EMFProperties.value(Literals.GEAR_RATIO_CONSTRAINT__FORCE)
				.observe(this.gearRatioConstraint);

		UpdateValueStrategy forceUpdateValueStrategy = new UpdateValueStrategy();
		forceUpdateValueStrategy.setConverter(new DoubleToStringConverter(new DecimalFormat("0.000")));

		bindingContext.bindValue(forceObserveWidget, forceObserveValue,
				new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), forceUpdateValueStrategy);

		return bindingContext;
	}

	public org.eclipse.apogy.common.topology.addons.dynamics.GearRatioConstraint getGearRatioConstraint() {
		return this.gearRatioConstraint;
	}

	public void setGearRatioConstraint(
			org.eclipse.apogy.common.topology.addons.dynamics.GearRatioConstraint newGearRatioConstraint) {
		setGearRatioConstraint(newGearRatioConstraint, true);
	}

	public void setGearRatioConstraint(
			org.eclipse.apogy.common.topology.addons.dynamics.GearRatioConstraint newGearRatioConstraint,
			boolean update) {
		this.gearRatioConstraint = newGearRatioConstraint;
		if (update) {
			if (this.m_bindingContext != null) {
				this.m_bindingContext.dispose();
				this.m_bindingContext = null;
			}
			if (this.gearRatioConstraint != null) {
				this.m_bindingContext = initDataBindings();
			}
		}
	}

}