bundles/addons/org.eclipse.apogy.addons.sensors.imaging.camera/src/org/eclipse/apogy/addons/sensors/imaging/camera/composites/RescaleFilterComposite.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.sensors.imaging.camera.composites;

import org.eclipse.apogy.addons.sensors.imaging.camera.ApogyAddonsSensorsImagingCameraPackage;
import org.eclipse.apogy.addons.sensors.imaging.camera.RescaleFilter;
import org.eclipse.apogy.common.emf.transaction.ApogyCommonTransactionFacade;
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.emf.databinding.FeaturePath;
import org.eclipse.emf.databinding.edit.EMFEditProperties;
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.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

public class RescaleFilterComposite extends Composite {
	private RescaleFilter rescaleFilter;

	private final ImageFilterComposite imageFilterComposite;
	private final Text scaleText;

	private DataBindingContext m_bindingContext;

	public RescaleFilterComposite(Composite parent, int style) {
		super(parent, style);
		setLayout(new GridLayout(1, false));

		Group grpSettings = new Group(this, SWT.NONE);
		grpSettings.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
		grpSettings.setText("Settings");
		grpSettings.setLayout(new GridLayout(2, false));

		Label lblContrast = new Label(grpSettings, SWT.NONE);
		lblContrast.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
		lblContrast.setText("Scale :");

		this.scaleText = new Text(grpSettings, SWT.BORDER);
		this.scaleText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
		this.scaleText.addKeyListener(new KeyListener() {

			@Override
			public void keyReleased(KeyEvent e) {
				try {
					newExposureSelected(Double.parseDouble(RescaleFilterComposite.this.scaleText.getText()));
				} catch (Exception ex) {
				}
			}

			@Override
			public void keyPressed(KeyEvent e) {
				try {
					newExposureSelected(Double.parseDouble(RescaleFilterComposite.this.scaleText.getText()));
				} catch (Exception ex) {
				}
			}
		});

		Group grpPreview = new Group(this, SWT.NONE);
		grpPreview.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
		grpPreview.setText("Preview");
		grpPreview.setLayout(new GridLayout(1, false));

		this.imageFilterComposite = new ImageFilterComposite(grpPreview, SWT.NONE);

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

			}
		});
	}

	public RescaleFilter getRescaleFilter() {
		return this.rescaleFilter;
	}

	public void setRescaleFilter(RescaleFilter rescaleFilter) {
		if (this.m_bindingContext != null) {
			this.m_bindingContext.dispose();
		}

		this.rescaleFilter = rescaleFilter;

		if (rescaleFilter != null) {
			this.m_bindingContext = customInitDataBindings();
		}

		this.imageFilterComposite.setImageFilter(rescaleFilter);
	}

	protected void newExposureSelected(double contrast) {
	}

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

		/* Contrast Value. */
		IObservableValue<Double> observeScale = EMFEditProperties
				.value(ApogyCommonTransactionFacade.INSTANCE.getTransactionalEditingDomain(this.rescaleFilter),
						FeaturePath.fromList(ApogyAddonsSensorsImagingCameraPackage.Literals.RESCALE_FILTER__SCALE))
				.observe(this.rescaleFilter);
		IObservableValue<String> observeScaleText = WidgetProperties.text(SWT.Modify).observe(this.scaleText);

		bindingContext.bindValue(observeScaleText, observeScale,
				new UpdateValueStrategy().setConverter(new Converter(String.class, Double.class) {
					@Override
					public Object convert(Object fromObject) {
						double tmp = RescaleFilterComposite.this.rescaleFilter.getScale();
						try {
							tmp = Double.parseDouble((String) fromObject);
						} catch (Throwable t) {
						}

						return tmp;
					}

				}), new UpdateValueStrategy().setConverter(new Converter(Double.class, String.class) {
					@Override
					public Object convert(Object fromObject) {
						return ((Double) fromObject).toString();
					}

				}));

		return bindingContext;
	}
}