bundles/core/org.eclipse.apogy.core.environment.surface.ui/src/org/eclipse/apogy/core/environment/surface/ui/wizards/CartesianTriangularMeshDerivedImageMapLayerWizardPage.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 - initial API and implementation
 *
 * SPDX-License-Identifier: EPL-1.0
 *     
 *******************************************************************************/
package org.eclipse.apogy.core.environment.surface.ui.wizards;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.apogy.common.emf.transaction.ApogyCommonTransactionFacade;
import org.eclipse.apogy.core.environment.surface.AbstractMapLayer;
import org.eclipse.apogy.core.environment.surface.ApogySurfaceEnvironmentPackage;
import org.eclipse.apogy.core.environment.surface.CartesianTriangularMeshDerivedImageMapLayer;
import org.eclipse.apogy.core.environment.surface.CartesianTriangularMeshMapLayer;
import org.eclipse.apogy.core.environment.surface.Map;
import org.eclipse.apogy.core.environment.surface.ui.ApogySurfaceEnvironmentUIRCPConstants;
import org.eclipse.apogy.core.environment.surface.ui.ImageMapLayerUISettings;
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.common.notify.AdapterFactory;
import org.eclipse.emf.databinding.FeaturePath;
import org.eclipse.emf.databinding.edit.EMFEditProperties;
import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider;
import org.eclipse.jface.databinding.swt.WidgetProperties;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.wizard.WizardPage;
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.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Tree;

public class CartesianTriangularMeshDerivedImageMapLayerWizardPage extends WizardPage {
	private final static String WIZARD_PAGE_ID = "org.eclipse.apogy.core.environment.surface.ui.wizards.CartesianTriangularMeshDerivedImageMapLayerWizardPage";

	private final CartesianTriangularMeshDerivedImageMapLayer cartesianTriangularMeshDerivedImageMapLayer;
	private final ImageMapLayerUISettings uiSettings;

	private final AdapterFactory adapterFactory = new ComposedAdapterFactory(
			ComposedAdapterFactory.Descriptor.Registry.INSTANCE);

	private Tree tree;
	private TreeViewer treeViewer;
	private Text txtRequiredresolutiontext;

	private DataBindingContext m_bindingContext;

	public CartesianTriangularMeshDerivedImageMapLayerWizardPage(
			CartesianTriangularMeshDerivedImageMapLayer cartesianTriangularMeshDerivedImageMapLayer,
			ImageMapLayerUISettings uiSettings) {
		super(WIZARD_PAGE_ID);

		this.cartesianTriangularMeshDerivedImageMapLayer = cartesianTriangularMeshDerivedImageMapLayer;
		this.uiSettings = uiSettings;

		setTitle("Mesh Derived Image Map Layer");
		setDescription(
				"Select the required resolution and map layer containing the mesh for which to generate the image.");

		validate();
	}

	@Override
	public void createControl(Composite parent) {
		Composite container = new Composite(parent, SWT.None);
		container.setLayout(new GridLayout(2, false));

		Label lblRequiredResolutionmpixel = new Label(container, SWT.NONE);
		lblRequiredResolutionmpixel.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
		lblRequiredResolutionmpixel.setText("Resolution (m/pixel):");

		this.txtRequiredresolutiontext = new Text(container, SWT.BORDER);
		this.txtRequiredresolutiontext.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));

		Label lblCartesianTriangularMeshMapLayer = new Label(container, SWT.NONE);
		lblCartesianTriangularMeshMapLayer.setLayoutData(new GridData(SWT.RIGHT, SWT.TOP, false, false, 1, 1));
		lblCartesianTriangularMeshMapLayer.setText("Source Mesh Layer:");

		// List the available ImageMapLayer.
		this.treeViewer = new TreeViewer(container,
				SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION | SWT.MULTI);
		this.tree = this.treeViewer.getTree();
		GridData gd_tree = new GridData(SWT.FILL, SWT.FILL, false, true, 1, 1);
		gd_tree.widthHint = 300;
		gd_tree.minimumWidth = 300;
		this.tree.setLayoutData(gd_tree);
		this.tree.setLinesVisible(true);

		// Tree showing all the CartesianTriangularMeshMapLayers.
		this.treeViewer.setContentProvider(new CompositeFilterContentProvider());
		this.treeViewer.setLabelProvider(new AdapterFactoryLabelProvider(this.adapterFactory));
		this.treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
			@Override
			public void selectionChanged(SelectionChangedEvent event) {
				CartesianTriangularMeshMapLayer cartesianTriangularMeshMapLayer = (CartesianTriangularMeshMapLayer) ((IStructuredSelection) event
						.getSelection()).getFirstElement();
				CartesianTriangularMeshDerivedImageMapLayerWizardPage.this.uiSettings.getUserDataMap().put(
						ApogySurfaceEnvironmentUIRCPConstants.USER_DATA__CARTESIAN_TRIANGULAR_MESH_MAP_LAYER__ID,
						cartesianTriangularMeshMapLayer);
				ApogyCommonTransactionFacade.INSTANCE.basicSet(
						CartesianTriangularMeshDerivedImageMapLayerWizardPage.this.cartesianTriangularMeshDerivedImageMapLayer,
						ApogySurfaceEnvironmentPackage.Literals.CARTESIAN_TRIANGULAR_MESH_DERIVED_IMAGE_MAP_LAYER__CARTESIAN_TRIANGULAR_MESH_MAP_LAYER,
						cartesianTriangularMeshMapLayer);
				validate();
			}
		});
		this.treeViewer.setInput(this.uiSettings.getMap());

		// Bindings
		this.m_bindingContext = initDataBindingsCustom();

		setControl(container);

		validate();

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

			}
		});
	}

	protected void validate() {

		if (this.uiSettings.getUserDataMap().get(
				ApogySurfaceEnvironmentUIRCPConstants.USER_DATA__CARTESIAN_TRIANGULAR_MESH_MAP_LAYER__ID) != null) {
			setErrorMessage(null);
			setPageComplete(true);
		} else {
			setErrorMessage("The Cartesian Triangular Mesh Map Layer is not set !");
			setPageComplete(false);
		}
	}

	@SuppressWarnings("unchecked")
	private DataBindingContext initDataBindingsCustom() {
		DataBindingContext bindingContext = new DataBindingContext();

		/* Resolution Value. */
		IObservableValue<Double> observeRequiredResolution = EMFEditProperties.value(
				ApogyCommonTransactionFacade.INSTANCE
						.getTransactionalEditingDomain(this.cartesianTriangularMeshDerivedImageMapLayer),
				FeaturePath.fromList(
						ApogySurfaceEnvironmentPackage.Literals.CARTESIAN_TRIANGULAR_MESH_DERIVED_IMAGE_MAP_LAYER__REQUIRED_RESOLUTION))
				.observe(this.cartesianTriangularMeshDerivedImageMapLayer);
		IObservableValue<String> observeRequiredResolutionValueText = WidgetProperties.text(SWT.Modify)
				.observe(this.txtRequiredresolutiontext);

		bindingContext.bindValue(observeRequiredResolutionValueText, observeRequiredResolution,
				new UpdateValueStrategy().setConverter(new Converter(String.class, Double.class) {
					@Override
					public Object convert(Object fromObject) {
						return Double.parseDouble((String) fromObject);
					}

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

				}));

		return bindingContext;
	}

	public class CompositeFilterContentProvider implements ITreeContentProvider {
		@Override
		public void dispose() {
		}

		@Override
		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
		}

		@Override
		public Object[] getElements(Object inputElement) {
			if (inputElement instanceof Map) {
				Map map = (Map) inputElement;

				// Keeps only ImageMapLayer.
				return filterMap(map).toArray();
			}

			return null;
		}

		@Override
		public Object[] getChildren(Object parentElement) {
			if (parentElement instanceof Map) {
				Map map = (Map) parentElement;

				// Keeps only ImageMapLayer.
				return filterMap(map).toArray();
			}

			return null;
		}

		@Override
		public Object getParent(Object element) {
			return null;
		}

		@Override
		public boolean hasChildren(Object element) {
			if (element instanceof Map) {
				Map map = (Map) element;
				return !filterMap(map).isEmpty();
			} else {
				return false;
			}
		}

		protected List<CartesianTriangularMeshMapLayer> filterMap(Map map) {
			List<CartesianTriangularMeshMapLayer> imageMapLayers = new ArrayList<CartesianTriangularMeshMapLayer>();
			for (AbstractMapLayer layer : map.getLayers()) {
				if (layer instanceof CartesianTriangularMeshMapLayer) {
					imageMapLayers.add(((CartesianTriangularMeshMapLayer) layer));
				}
			}

			return imageMapLayers;
		}
	}
}