AlignmentPropertyEditorWidget.java

/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
*/

package org.pentaho.pms.ui.concept.editor;

import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.pentaho.pms.schema.concept.types.alignment.AlignmentSettings;

public class AlignmentPropertyEditorWidget extends AbstractPropertyEditorWidget implements ISelectionChangedListener {
  // ~ Static fields/initializers ======================================================================================

  private static final Log logger = LogFactory.getLog(AlignmentPropertyEditorWidget.class);

  // ~ Instance fields =================================================================================================

  private ComboViewer typeComboViewer;

  Label typeLabel;

  Combo type;

  // ~ Constructors ====================================================================================================

  public AlignmentPropertyEditorWidget(final Composite parent, final int style, final IConceptModel conceptModel,
      final String propertyId, final Map context) {
    super(parent, style, conceptModel, propertyId, context);
    refresh();
    if (logger.isDebugEnabled()) {
      logger.debug("created AlignmentPropertyEditorWidget");
    }
  }

  // ~ Methods =========================================================================================================

  protected void createContents(final Composite parent) {
    addDisposeListener(new DisposeListener() {
      public void widgetDisposed(DisposeEvent e) {
        AlignmentPropertyEditorWidget.this.widgetDisposed(e);
      }
    });
    typeLabel = new Label(parent, SWT.NONE);
    typeLabel.setText("Alignment Type:");
    type = new Combo(parent, SWT.READ_ONLY | SWT.BORDER);
    typeComboViewer = new ComboViewer(type);

    typeComboViewer.setContentProvider(new IStructuredContentProvider() {
      public Object[] getElements(final Object inputElement) {
        return (AlignmentSettings[]) inputElement;
      }

      public void dispose() {
      }

      public void inputChanged(final Viewer viewer, final Object oldInput, final Object newInput) {
      }
    });

    typeComboViewer.setInput(AlignmentSettings.types);

    typeComboViewer.setLabelProvider(new LabelProvider() {
      public Image getImage(final Object element) {
        // no images in this combo
        return null;
      }

      public String getText(final Object element) {
        return ((AlignmentSettings) element).getDescription();
      }
    });

    FormData fdType = new FormData();
    fdType.left = new FormAttachment(typeLabel, 10);
    fdType.top = new FormAttachment(0, 0);
    type.setLayoutData(fdType);

    FormData fdTypeLabel = new FormData();
    fdTypeLabel.left = new FormAttachment(0, 0);
    fdTypeLabel.top = new FormAttachment(type, 0, SWT.CENTER);
    typeLabel.setLayoutData(fdTypeLabel);

    typeComboViewer.addSelectionChangedListener(this);
  }

  protected void widgetDisposed(final DisposeEvent e) {
  }

  public Object getValue() {
    IStructuredSelection selection = (IStructuredSelection) typeComboViewer.getSelection();
    AlignmentSettings alignmentSettings = (AlignmentSettings) selection.getFirstElement();
    int aggType = alignmentSettings.getType();
    return new AlignmentSettings(aggType);
  }

  protected void setValue(final Object value) {
    if (value instanceof AlignmentSettings) {
      AlignmentSettings alignmentSettings = (AlignmentSettings) value;
      typeComboViewer.setSelection(new StructuredSelection(AlignmentSettings.getType(alignmentSettings.getCode())));
    }
  }

  public String validate() {
    return null;
  }

  public void selectionChanged(SelectionChangedEvent arg0) {
    putPropertyValue();
  }

  public void refresh() {
    refreshOverrideButton();
    typeComboViewer.removeSelectionChangedListener(this);
    typeLabel.setEnabled(isEditable());
    type.setEnabled(isEditable());
    setValue(getProperty().getValue());
    typeComboViewer.addSelectionChangedListener(this);
  }

  public void cleanup() {
    typeComboViewer.removeSelectionChangedListener(this);
  }
}