bundles/common/org.eclipse.apogy.common.emf.ui/src/org/eclipse/apogy/common/emf/ui/preferences/TypedElementsUnitsPreferencePage.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,
 *     Olivier L. Larouche - initial API and implementation
 * SPDX-License-Identifier: EPL-1.0
 * 
 *******************************************************************************/
package org.eclipse.apogy.common.emf.ui.preferences;

import org.eclipse.apogy.common.emf.ui.Activator;
import org.eclipse.apogy.common.emf.ui.DisplayUnitsRegistry;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Group;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;

public class TypedElementsUnitsPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

	private UnitsProvidersUnitsMapComposite composite;
	private Group structuralFeaturesUnitsGroup;

	/**
	 * Create the preference page.
	 */
	public TypedElementsUnitsPreferencePage() {
	}

	/**
	 * Create contents of the preference page.
	 * 
	 * @param parent
	 */
	@Override
	public Control createContents(Composite parent) {
		Composite container = new Composite(parent, SWT.NULL);
		container.setLayout(new GridLayout(1, false));

		this.structuralFeaturesUnitsGroup = new Group(container, SWT.None);
		this.structuralFeaturesUnitsGroup.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
		this.structuralFeaturesUnitsGroup.setLayout(new FillLayout());
		this.structuralFeaturesUnitsGroup.setText("Typed elements units display");

		this.composite = new UnitsProvidersUnitsMapComposite(this.structuralFeaturesUnitsGroup, SWT.None);
		this.composite.setMap(EcoreUtil.copy(DisplayUnitsRegistry.INSTANCE.getEntriesMap()));

		return container;
	}

	/**
	 * Initialize the preference page.
	 */
	@Override
	public void init(IWorkbench workbench) {
		setPreferenceStore(Activator.getDefault().getPreferenceStore());
	}

	@Override
	public boolean performOk() {
		storePreferences();
		return super.performOk();
	}

	@Override
	protected void performApply() {
		storePreferences();
		super.performApply();
	}

	@Override
	protected void performDefaults() {
		DisplayUnitsRegistry.INSTANCE.getEntriesMap().getEntries().clear();
		this.composite.setMap((EcoreUtil.copy(DisplayUnitsRegistry.INSTANCE.getEntriesMap())));
		super.performDefaults();
	}

	private void storePreferences() {
		DisplayUnitsRegistry.INSTANCE.setEntriesMap(this.composite.getMap());
		DisplayUnitsRegistry.INSTANCE.save();
	}
}