examples/org.eclipse.graphiti.examples.tutorial/src/org/eclipse/graphiti/examples/tutorial/property/TutorialEClassSection.java

/*********************************************************************
* Copyright (c) 2005, 2019 SAP SE
*
* This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0
* which is available at https://www.eclipse.org/legal/epl-2.0/
*
* Contributors:
*    SAP SE - initial API, implementation and documentation
*
* SPDX-License-Identifier: EPL-2.0
**********************************************************************/
package org.eclipse.graphiti.examples.tutorial.property;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.graphiti.mm.pictograms.PictogramElement;
import org.eclipse.graphiti.services.Graphiti;
import org.eclipse.graphiti.ui.platform.GFPropertySection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CLabel;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.views.properties.tabbed.ITabbedPropertyConstants;
import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage;
import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetWidgetFactory;

public class TutorialEClassSection extends GFPropertySection implements ITabbedPropertyConstants {

	private Text nameText;
	private PictogramElement currentPe;

	@Override
	public void createControls(Composite parent, TabbedPropertySheetPage tabbedPropertySheetPage) {
		super.createControls(parent, tabbedPropertySheetPage);

		TabbedPropertySheetWidgetFactory factory = getWidgetFactory();
		Composite composite = factory.createFlatFormComposite(parent);
		FormData data;

		nameText = factory.createText(composite, ""); //$NON-NLS-1$
		nameText.setEditable(false);
		data = new FormData();
		data.left = new FormAttachment(0, STANDARD_LABEL_WIDTH);
		data.right = new FormAttachment(100, 0);
		data.top = new FormAttachment(0, VSPACE);
		nameText.setLayoutData(data);

		CLabel valueLabel = factory.createCLabel(composite, "Name:"); //$NON-NLS-1$
		data = new FormData();
		data.left = new FormAttachment(0, 0);
		data.right = new FormAttachment(nameText, -HSPACE);
		data.top = new FormAttachment(nameText, 0, SWT.CENTER);
		valueLabel.setLayoutData(data);
	}

	@Override
	public void refresh() {
		PictogramElement pe = getSelectedPictogramElement();
		if (pe != null && !pe.equals(currentPe)) {
			currentPe = pe;
			Object bo = Graphiti.getLinkService().getBusinessObjectForLinkedPictogramElement(pe);
			// the filter assured, that it is a EClass
			if (bo == null)
				return;
			String name = ((EClass) bo).getName();
			nameText.setText(name == null ? "" : name); //$NON-NLS-1$
		}
	}
}