org.eclipse.papyrus.widgets.editors.BooleanCombo.java Source code

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Here is the source code for org.eclipse.papyrus.widgets.editors.BooleanCombo.java

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/*****************************************************************************
 * Copyright (c) 2011 CEA LIST.
 *    
 * 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:
 *  Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
 *****************************************************************************/
package org.eclipse.papyrus.widgets.editors;

import org.eclipse.jface.databinding.viewers.ViewerProperties;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.papyrus.widgets.providers.AbstractStaticContentProvider;
import org.eclipse.papyrus.widgets.providers.EncapsulatedContentProvider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.widgets.Composite;

/**
 * An editor representing a boolean value as a combo box, with
 * two options (true / false)
 * 
 * @author Camille Letavernier
 * 
 */
public class BooleanCombo extends AbstractValueEditor {

    private ComboViewer viewer;

    /**
     * Constructor.
     * 
     * @param parent
     *        The Composite widget in which this editor will be displayed
     */
    public BooleanCombo(Composite parent) {
        this(parent, SWT.NONE, null);
    }

    /**
     * 
     * Constructor.
     * 
     * @param parent
     *        The Composite widget in which this editor will be displayed
     * @param style
     *        The style of this editor's CCombo
     * @param label
     *        This editor's label
     */
    public BooleanCombo(Composite parent, int style, String label) {
        super(parent, style, label);
        CCombo combo = factory.createCCombo(this, style);
        combo.setLayoutData(getDefaultLayoutData());
        combo.setEditable(false);
        viewer = new ComboViewer(combo);

        viewer.setContentProvider(new EncapsulatedContentProvider(new AbstractStaticContentProvider() {

            public Object[] getElements() {
                return new Boolean[] { Boolean.TRUE, Boolean.FALSE };
            }
        }));

        viewer.setInput(""); //$NON-NLS-1$

        setWidgetObservable(ViewerProperties.singleSelection().observe(viewer));

        setCommitOnFocusLost(combo);
    }

    /**
     * 
     * Constructor.
     * 
     * @param parent
     *        The Composite widget in which this editor will be displayed
     * @param style
     *        The style of this editor's CCombo
     */
    public BooleanCombo(Composite parent, int style) {
        this(parent, style, null);
    }

    /**
     * 
     * Constructor.
     * 
     * @param parent
     *        The Composite widget in which this editor will be displayed
     * @param label
     *        This editor's label
     */
    public BooleanCombo(Composite parent, String label) {
        this(parent, SWT.NONE, label);
    }

    @Override
    public Object getValue() {
        return ((StructuredSelection) viewer.getSelection()).getFirstElement();
    }

    @Override
    public Object getEditableType() {
        return Boolean.class;
    }

    @Override
    public void setReadOnly(boolean readOnly) {
        viewer.getCCombo().setEnabled(!readOnly);
    }

    @Override
    public boolean isReadOnly() {
        return !viewer.getCCombo().isEnabled();
    }

    @Override
    public void setToolTipText(String text) {
        viewer.getCCombo().setToolTipText(text);
        super.setLabelToolTipText(text);
    }

}