/*
 * Copyright (c) 2006 Stiftung Deutsches Elektronen-Synchroton,
 * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY.
 *
 * THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS.
 * WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. SHOULD THE SOFTWARE PROVE DEFECTIVE
 * IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR
 * CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE.
 * NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER.
 * DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
 * OR MODIFICATIONS.
 * THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION,
 * USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS
 * PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY
 * AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM
 */
package org.csstudio.sds.components.ui.internal.editparts;

import org.csstudio.sds.components.model.WaveformModel;
import org.csstudio.sds.components.ui.internal.figures.WaveformFigure;
import org.csstudio.sds.ui.editparts.IWidgetPropertyChangeHandler;
import org.eclipse.draw2d.IFigure;

/**
 * EditPart controller for the Waveform widget. The controller mediates between
 * {@link WaveformModel} and {@link WaveformFigure}.
 *
 * @author Sven Wende, Kai Meyer, Joerg Rathlev
 *
 */
public final class WaveformEditPart extends AbstractChartEditPart {

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected IFigure doCreateFigure() {
		WaveformModel model = (WaveformModel) getWidgetModel();
		WaveformFigure figure = new WaveformFigure(WaveformModel.NUMBER_OF_ARRAYS);
		initializeCommonFigureProperties(figure, model);
		initializeDataProperties(figure, model);
		return figure;
	}

	/**
	 * Initializes the data properties of the figure.
	 *
	 * @param figure
	 *            the figure.
	 * @param model
	 *            the model.
	 */
	private void initializeDataProperties(final WaveformFigure figure,
			final WaveformModel model) {
		for (int i = 0; i < model.numberOfDataSeries(); i++) {
			figure.setData(i, model.getData(i));
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected void registerPropertyChangeHandlers() {
		registerCommonPropertyChangeHandlers();
		registerDataPropertyChangeHandlers();
	}

	/**
	 * Registers the property change handlers for the waveform data properties.
	 */
	private void registerDataPropertyChangeHandlers() {
		/**
		 * Change handler for the waveform data properties.
		 */
		class DataChangeHandler implements IWidgetPropertyChangeHandler {

			private final int _index;

			/**
			 * Constructor.
			 * @param index the index of the data array.
			 */
			DataChangeHandler(final int index) {
				_index = index;
			}

			/**
			 * {@inheritDoc}
			 */
			@Override
			public boolean handleChange(final Object oldValue,
					final Object newValue, final IFigure refreshableFigure) {
				WaveformFigure figure = (WaveformFigure) refreshableFigure;
				figure.setData(_index, (double[]) newValue);
				return true;
			}
		}

		for (int i = 0; i < WaveformModel.NUMBER_OF_ARRAYS; i++) {
			setPropertyChangeHandler(WaveformModel.dataPropertyId(i),
					new DataChangeHandler(i));
		}
	}
}