bundles/org.eclipse.e4.tools.emf.ui/src/org/eclipse/e4/tools/emf/ui/internal/common/component/CoreExpressionEditor.java

/*******************************************************************************
 * Copyright (c) 2010 BestSolution.at and others.
 * 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:
 *     Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
 ******************************************************************************/
package org.eclipse.e4.tools.emf.ui.internal.common.component;

import java.net.MalformedURLException;
import java.net.URL;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.value.WritableValue;
import org.eclipse.e4.tools.emf.ui.common.component.AbstractComponentEditor;
import org.eclipse.e4.tools.emf.ui.internal.Messages;
import org.eclipse.e4.tools.emf.ui.internal.common.ModelEditor;
import org.eclipse.e4.tools.emf.ui.internal.common.component.dialogs.ExpressionIdDialog;
import org.eclipse.e4.ui.model.application.ui.MCoreExpression;
import org.eclipse.e4.ui.model.application.ui.impl.UiPackageImpl;
import org.eclipse.emf.databinding.EMFDataBindingContext;
import org.eclipse.emf.databinding.edit.EMFEditProperties;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.jface.databinding.swt.IWidgetValueProperty;
import org.eclipse.jface.databinding.swt.WidgetProperties;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

public class CoreExpressionEditor extends AbstractComponentEditor {
	private Composite composite;
	private Image image;
	private EMFDataBindingContext context;

	public CoreExpressionEditor(EditingDomain editingDomain, ModelEditor editor) {
		super(editingDomain, editor);
	}

	@Override
	public Image getImage(Object element, Display display) {
		if (image == null) {
			try {
				image = loadSharedImage(display, new URL("platform:/plugin/org.eclipse.e4.tools.emf.ui/icons/full/modelelements/CoreExpression.png")); //$NON-NLS-1$
			} catch (MalformedURLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

		return image;
	}

	@Override
	public String getLabel(Object element) {
		return Messages.CoreExpressionEditor_TreeLabel;
	}

	@Override
	public String getDetailLabel(Object element) {
		if (((MCoreExpression) element).getCoreExpressionId() != null && ((MCoreExpression) element).getCoreExpressionId().trim().length() > 0) {
			return ((MCoreExpression) element).getCoreExpressionId();
		}
		return null;
	}

	@Override
	public String getDescription(Object element) {
		return Messages.CoreExpressionEditor_TreeLabelDescription;
	}

	@Override
	public Composite getEditor(Composite parent, Object object) {
		if (composite == null) {
			context = new EMFDataBindingContext();
			composite = new Composite(parent, SWT.NONE);
			composite.setLayout(new FillLayout());
			createForm(composite, context, getMaster());
		}
		getMaster().setValue(object);
		return composite;
	}

	private Composite createForm(Composite parent, EMFDataBindingContext context, WritableValue master) {
		parent = new Composite(parent, SWT.NONE);
		GridLayout gl = new GridLayout(3, false);
		gl.horizontalSpacing = 10;
		parent.setLayout(gl);

		if (getEditor().isShowXMIId() || getEditor().isLiveModel()) {
			ControlFactory.createXMIId(parent, this);
		}

		IWidgetValueProperty textProp = WidgetProperties.text(SWT.Modify);

		{
			Label l = new Label(parent, SWT.NONE);
			l.setText(Messages.CoreExpressionEditor_ExpressionId);
			l.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_END));

			final Text t = new Text(parent, SWT.BORDER);
			GridData gd = new GridData(GridData.FILL_HORIZONTAL);
			t.setLayoutData(gd);
			context.bindValue(textProp.observeDelayed(200, t), EMFEditProperties.value(getEditingDomain(), UiPackageImpl.Literals.CORE_EXPRESSION__CORE_EXPRESSION_ID).observeDetail(getMaster()));

			if (getEditor().getExtensionLookup() == null) {
				gd.horizontalSpan = 2;
			} else {
				Button b = new Button(parent, SWT.PUSH | SWT.FLAT);
				b.setText(Messages.ModelTooling_Common_FindEllipsis);
				b.addSelectionListener(new SelectionAdapter() {
					@Override
					public void widgetSelected(SelectionEvent e) {
						ExpressionIdDialog dialog = new ExpressionIdDialog(t.getShell(), getEditor().getExtensionLookup(), (MCoreExpression) getMaster().getValue(), getEditingDomain(), getEditor().isLiveModel());
						dialog.open();
					}
				});
			}
		}

		return parent;
	}

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

}