org.kalypso.ogc.gml.outline.handler.ExportFileControls.java Source code

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Here is the source code for org.kalypso.ogc.gml.outline.handler.ExportFileControls.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 * 
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 * 
 *  and
 *  
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 * 
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 * 
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 *  Contact:
 * 
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *   
 *  ---------------------------------------------------------------------------*/
package org.kalypso.ogc.gml.outline.handler;

import org.eclipse.core.databinding.beans.BeansObservables;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.databinding.swt.ISWTObservableValue;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.kalypso.commons.databinding.DataBinder;
import org.kalypso.commons.databinding.IDataBinding;
import org.kalypso.commons.databinding.conversion.FileToStringConverter;
import org.kalypso.commons.databinding.conversion.StringToFileConverter;
import org.kalypso.commons.databinding.swt.FileValueSelectionListener;
import org.kalypso.commons.databinding.validation.FileAlreadyExistsValidator;
import org.kalypso.commons.databinding.validation.FileShouldNotBeDirectoryValidator;
import org.kalypso.commons.databinding.validation.StringBlankValidator;
import org.kalypso.ui.internal.i18n.Messages;

/**
 * Helper class for creating the typical export file field and button.
 * 
 * @author Gernot Belger
 */
public class ExportFileControls {
    private final IDataBinding m_binding;

    private final IExportFileData m_data;

    private final FileValueSelectionListener m_fileListener;

    public ExportFileControls(final IExportFileData data, final IDataBinding binding, final String titel) {
        m_data = data;
        m_binding = binding;

        m_fileListener = new FileValueSelectionListener(null, titel, SWT.SAVE);
    }

    public void createControls(final Composite parent, final int numFieldColumns) {
        final Text fileField = new Text(parent, SWT.BORDER | SWT.SINGLE);
        fileField.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

        final Button fileButton = new Button(parent, SWT.PUSH);
        fileButton.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false, numFieldColumns, 1));
        fileButton.setText(Messages.getString("ExportFileControls_0")); //$NON-NLS-1$

        /* field binding */
        final ISWTObservableValue target = SWTObservables.observeText(fileField,
                new int[] { SWT.Modify, SWT.DefaultSelection });
        final IObservableValue model = BeansObservables.observeValue(m_data,
                AbstractExportFileData.PROPERTY_EXPORT_FILE);
        final DataBinder binder = new DataBinder(target, model);

        binder.setTargetToModelConverter(new StringToFileConverter());
        binder.setModelToTargetConverter(new FileToStringConverter());

        binder.addTargetAfterGetValidator(
                new StringBlankValidator(IStatus.ERROR, Messages.getString("ExportFileControls_1"))); //$NON-NLS-1$
        binder.addTargetAfterConvertValidator(new FileShouldNotBeDirectoryValidator());
        binder.addTargetAfterConvertValidator(new FileAlreadyExistsValidator());

        m_binding.bindValue(binder);

        /* Button binding */
        m_fileListener.addAllFilter();
        m_fileListener.setFileValue(model);
        fileButton.addSelectionListener(m_fileListener);
    }

    public void addFilter(final String name, final String extension) {
        m_fileListener.addFilter(name, extension);
    }
}