CommandPropertySource.java

/*****************************************************************************
 *  Limpet - the Lightweight InforMation ProcEssing Toolkit
 *  http://limpet.info
 *
 *  (C) 2015-2016, Deep Blue C Technologies Ltd
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the Eclipse Public License v1.0
 *  (http://www.eclipse.org/legal/epl-v10.html)
 *
 *  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.
 *****************************************************************************/
package info.limpet.ui.data_provider.data;

import info.limpet.data.operations.arithmetic.SimpleMovingAverageOperation.SimpleMovingAverageCommand;
import info.limpet.ui.propertyeditors.SliderPropertyDescriptor;

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

import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.IPropertySource;
import org.eclipse.ui.views.properties.PropertyDescriptor;
import org.eclipse.ui.views.properties.TextPropertyDescriptor;

/**
 * This class provides property sheet properties for ButtonElement.
 */
public class CommandPropertySource implements IPropertySource
{

  private static final String COMMAND_NAME = "limpet.operation.name";
  private static final String COMMAND_DESCRIPTION =
      "limpet.operation.description";
  private static final String COMMAND_DYNAMIC = "limpet.operation.dynamic";
  private static final String AVERAGE_WINDOW =
      "limpet.operation.movingaverage.window";

  private IPropertyDescriptor[] propertyDescriptors;
  private final CommandWrapper _operation;

  /**
   * Creates a new ButtonElementPropertySource.
   * 
   * @param operationWrapper
   *          the element whose properties this instance represents
   */
  public CommandPropertySource(final CommandWrapper operationWrapper)
  {
    _operation = operationWrapper;
  }

  @Override
  public Object getEditableValue()
  {
    return _operation;
  }

  /**
   * @see org.eclipse.ui.views.properties.IPropertySource#getPropertyDescriptors()
   */
  @Override
  public IPropertyDescriptor[] getPropertyDescriptors()
  {
    if (propertyDescriptors == null)
    {
      List<IPropertyDescriptor> list = new ArrayList<IPropertyDescriptor>();

      // Create a descriptor and set a category
      final PropertyDescriptor textDescriptor =
          new PropertyDescriptor(COMMAND_NAME, "Name");
      textDescriptor.setCategory("Label");
      list.add(textDescriptor);
      final PropertyDescriptor descriptionDescriptor =
          new TextPropertyDescriptor(COMMAND_DESCRIPTION, "Description");
      descriptionDescriptor.setCategory("Label");
      list.add(descriptionDescriptor);
      final PropertyDescriptor dynamicDescriptor =
          new CheckboxPropertyDescriptor(COMMAND_DYNAMIC, "Dynamic updates");
      dynamicDescriptor.setCategory("Label");
      list.add(dynamicDescriptor);

      // hmm, is it our moving average?
      if (_operation.getCommand() instanceof SimpleMovingAverageCommand)
      {
        final SliderPropertyDescriptor windowDescriptor =
            new SliderPropertyDescriptor(AVERAGE_WINDOW, "Window", 1, 20);
        windowDescriptor.setCategory("Calculation");
        list.add(windowDescriptor);
      }

      propertyDescriptors =
          (IPropertyDescriptor[]) list.toArray(new IPropertyDescriptor[]
          {});
    }
    return propertyDescriptors;
  }

  @Override
  public Object getPropertyValue(final Object id)
  {
    final String prop = (String) id;

    if (prop.equals(COMMAND_NAME))
    {
      return _operation.getCommand().getName();
    }
    else if (prop.equals(COMMAND_DESCRIPTION))
    {
      return _operation.getCommand().getDescription();
    }
    else if (prop.equals(COMMAND_DYNAMIC))
    {
      return _operation.getCommand().getDynamic();
    }
    else if (prop.equals(AVERAGE_WINDOW))
    {
      return ""
          + ((SimpleMovingAverageCommand) _operation.getCommand())
              .getWindowSize();
    }

    return null;
  }

  @Override
  public boolean isPropertySet(final Object id)
  {
    // TODO Auto-generated method stub
    return false;
  }

  @Override
  public void resetPropertyValue(final Object id)
  {
    // TODO Auto-generated method stub

  }

  @Override
  public void setPropertyValue(final Object id, final Object value)
  {
    final String prop = (String) id;
    if (prop.equals(COMMAND_DYNAMIC))
    {
      boolean res = (boolean) value;
      _operation.getCommand().setDynamic(res);
    }
    else if (prop.equals(AVERAGE_WINDOW))
    {
      ((SimpleMovingAverageCommand) _operation.getCommand())
          .setWindowSize(Integer.parseInt((String) value));
    }
  }

}