org.eclipse.emf.ecp.controls.vaadin.internal.EnumComboViewerVaadinRenderer.java Source code

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Here is the source code for org.eclipse.emf.ecp.controls.vaadin.internal.EnumComboViewerVaadinRenderer.java

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/*******************************************************************************
 * Copyright (c) 2014 Dennis Melzer 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:
 * Dennis - initial API and implementation
 ******************************************************************************/
package org.eclipse.emf.ecp.controls.vaadin.internal;

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

import org.eclipse.emf.ecore.EEnum;
import org.eclipse.emf.ecore.EEnumLiteral;
import org.eclipse.emf.ecore.EStructuralFeature.Setting;
import org.eclipse.emf.ecp.controls.vaadin.AbstractVaadinSimpleControlRenderer;
import org.eclipse.emf.edit.provider.IItemLabelProvider;

import com.vaadin.ui.AbstractSelect.ItemCaptionMode;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.Component;

/**
 * The Vaadin Renderer for a enum value.
 *
 * @author Dennis Melzer
 *
 */
public class EnumComboViewerVaadinRenderer extends AbstractVaadinSimpleControlRenderer {

    @Override
    public Component createControl() {
        final Setting setting = getVElement().getDomainModelReference().getIterator().next();
        final IItemLabelProvider labelProvider = getItemPropertyDescriptor(setting).getLabelProvider(null);

        final ComboBox combobox = new ComboBox() {
            @Override
            public String getItemCaption(Object itemId) {
                return labelProvider.getText(itemId);
            }
        };
        combobox.setItemCaptionMode(ItemCaptionMode.ITEM);
        final List<Object> inputValues = new ArrayList<Object>();
        for (final EEnumLiteral literal : EEnum.class.cast(setting.getEStructuralFeature().getEType())
                .getELiterals()) {
            inputValues.add(literal.getInstance());
        }

        combobox.setInvalidAllowed(false);
        combobox.setNullSelectionAllowed(false);
        combobox.addItems(inputValues);
        return combobox;
    }

    @Override
    protected String getUnsetLabel() {
        return VaadinRendererMessages.EnumComboViewerVaadinRenderer_NoValueSetClickToSetValue;
    }

}