bundles/org.eclipse.emf.ecp.ui.view.swt/src/org/eclipse/emf/ecp/view/internal/swt/EmptyVElementSWTRenderer.java

/*******************************************************************************
 * Copyright (c) 2011-2014 EclipseSource Muenchen GmbH and others.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 * Edgar Mueller - initial API and implementation
 ******************************************************************************/
package org.eclipse.emf.ecp.view.internal.swt;

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

import org.eclipse.emf.ecp.view.spi.context.ViewModelContext;
import org.eclipse.emf.ecp.view.spi.model.VElement;
import org.eclipse.emf.ecp.view.spi.renderer.NoPropertyDescriptorFoundExeption;
import org.eclipse.emf.ecp.view.spi.renderer.NoRendererFoundException;
import org.eclipse.emfforms.spi.common.report.ReportService;
import org.eclipse.emfforms.spi.swt.core.AbstractSWTRenderer;
import org.eclipse.emfforms.spi.swt.core.layout.GridDescriptionFactory;
import org.eclipse.emfforms.spi.swt.core.layout.SWTGridCell;
import org.eclipse.emfforms.spi.swt.core.layout.SWTGridDescription;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;

/**
 * An no-op renderer.
 *
 * @author emueller
 * @since 1.3
 *
 */
public final class EmptyVElementSWTRenderer extends AbstractSWTRenderer<VElement> {

	private final SWTGridDescription gridDescription;

	/**
	 * @param vElement the view model element to be rendered
	 * @param viewContext the view context
	 * @param reportService teh {@link ReportService}
	 */
	public EmptyVElementSWTRenderer(VElement vElement, ViewModelContext viewContext, ReportService reportService) {
		super(vElement, viewContext, reportService);
		gridDescription = GridDescriptionFactory.INSTANCE.createEmptyGridDescription();
		final SWTGridCell gc = new SWTGridCell(0, 0, this);
		gc.setHorizontalFill(true);
		gc.setHorizontalGrab(true);
		gc.setVerticalFill(false);
		gc.setVerticalGrab(false);
		final List<SWTGridCell> grid = new ArrayList<SWTGridCell>();
		grid.add(gc);
		gridDescription.setGrid(grid);
	}

	/**
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emfforms.spi.swt.core.AbstractSWTRenderer#getGridDescription(org.eclipse.emfforms.spi.swt.core.layout.SWTGridDescription)
	 */
	@Override
	public SWTGridDescription getGridDescription(SWTGridDescription gridDescription) {
		return this.gridDescription;
	}

	/**
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emfforms.spi.swt.core.AbstractSWTRenderer#renderControl(org.eclipse.emfforms.spi.swt.core.layout.SWTGridCell,
	 *      org.eclipse.swt.widgets.Composite)
	 */
	@Override
	protected Control renderControl(SWTGridCell cell, Composite parent) throws NoRendererFoundException,
		NoPropertyDescriptorFoundExeption {
		// do not render anything
		return parent;
	}

	/**
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emfforms.spi.swt.core.AbstractSWTRenderer#applyEnable()
	 */
	@Override
	protected void applyEnable() {
		// do nothing
	}

	/**
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emfforms.spi.swt.core.AbstractSWTRenderer#applyValidation()
	 */
	@Override
	protected void applyValidation() {
		// do nothing
	}

	/**
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emfforms.spi.swt.core.AbstractSWTRenderer#applyVisible()
	 */
	@Override
	protected void applyVisible() {
		// do nothing
	}

}