/*
 * Copyright (c) 2008 Stiftung Deutsches Elektronen-Synchrotron,
 * 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.ui.figures;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.FigureListener;
import org.eclipse.draw2d.FreeformLayout;
import org.eclipse.draw2d.FreeformViewport;
import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.LayeredPane;
import org.eclipse.draw2d.Panel;
import org.eclipse.draw2d.ScalableFreeformLayeredPane;
import org.eclipse.draw2d.ScrollPane;
import org.eclipse.draw2d.XYLayout;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.editparts.ZoomManager;

/**
 * A Widget, which links to another display.
 *
 * @author Sven Wende
 *
 */
public final class LinkingContainerFigure extends Panel implements IAdaptable {

	/**
	 * The content pane of this widget.
	 */
	private final ScalableFreeformLayeredPane _pane;
	/**
	 * The zoom manager for this widget.
	 */
	private final ZoomManager _zoomManager;

	private final FreeformViewport _freeformViewport;
	private boolean autoFit;

	private final ScrollPane scrollpane;
    private CrossedOutAdapter _crossedOutAdapter;
    private IRhombusEquippedWidget _rhombusAdapter;
	/**
	 * Constructor.
	 */
	public LinkingContainerFigure() {
		final XYLayout layout = new XYLayout();
		setLayoutManager(layout);

		scrollpane = new ScrollPane();
		scrollpane.setScrollBarVisibility(ScrollPane.NEVER);
		_freeformViewport = new FreeformViewport();
		_freeformViewport.setSize(40,40);
		scrollpane.setViewport(_freeformViewport);
		add(scrollpane);

		_pane = new ScalableFreeformLayeredPane();
		_pane.setLayoutManager(new FreeformLayout());

		scrollpane.setContents(_pane);

		_zoomManager = new ZoomManager(_pane, _freeformViewport);

		setForegroundColor(ColorConstants.blue);
		setOpaque(true);

		addFigureListener(new FigureListener() {
			@Override
			public void figureMoved(final IFigure source) {
				updateChildConstraints();
				updateZoom();
			}

		});

		updateChildConstraints();
		updateZoom();
	}

	@Override
	public void paint(final Graphics graphics) {
	    super.paint(graphics);
	    _crossedOutAdapter.paint(graphics);
	    _rhombusAdapter.paint(graphics);
	}

	/**
	 *
	 *
	 */
	private void updateChildConstraints() {
		final Rectangle figureBounds = getBounds();

		Rectangle r = new Rectangle(0, 0, figureBounds.width
				, figureBounds.height);

		_freeformViewport.setSize(r.width, r.height);
		_pane.setSize(new Dimension(r.width, r.height));
		setConstraint(scrollpane, r);
	}


	/**
	 * Returns the content pane.
	 *
	 * @return IFigure The content pane.
	 */
	public LayeredPane getContentsPane() {
		return _pane;
	}

	/**
	 * Refreshes the zoom.
	 */
	public void updateZoom() {
		_zoomManager.setZoom(1.0);

		if (autoFit) {
			_zoomManager.setZoomAsText(ZoomManager.FIT_ALL);
		}
	}


	/**
	 * {@inheritDoc}
	 */
	@Override
    protected boolean useLocalCoordinates() {
		return true;
	}

	/**
	 * This method is a tribute to unit tests, which need a way to test the
	 * performance of the figure implementation. Implementors should produce
	 * some random changes and refresh the figure, when this method is called.
	 *
	 */
	public void randomNoiseRefresh() {
		// nothing to do yet
	}

	public void setAutoFit(final boolean autoFit) {
		this.autoFit = autoFit;
		updateZoom();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public Object getAdapter(final Class adapter) {
		if (adapter == IBorderEquippedWidget.class) {
			return new BorderAdapter(this);
		}else  if (adapter == ICrossedFigure.class) {
		    if(_crossedOutAdapter==null) {
		        _crossedOutAdapter = new CrossedOutAdapter(this);
		    }
            return _crossedOutAdapter;
		}else  if (adapter == IRhombusEquippedWidget.class) {
		    if(_rhombusAdapter==null) {
		        _rhombusAdapter = new RhombusAdapter(this);
		    }
		    return _rhombusAdapter;
		}
		return null;

	}

}