flowdiagrameditpart.java

一个java写的business process management系统

/*
 * Copyright (c) 2003, Alexander Greif
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Flow4J-Eclipse project nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.orthanc.flow4j.designer.editparts;

import java.beans.PropertyChangeEvent;

import net.orthanc.flow4j.designer.model.FlowDiagramModelPart;

import org.eclipse.core.resources.IFile;
import org.eclipse.draw2d.AutomaticRouter;
import org.eclipse.draw2d.BendpointConnectionRouter;
import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.ConnectionLayer;
import org.eclipse.draw2d.FanRouter;
import org.eclipse.draw2d.Figure;
import org.eclipse.draw2d.FreeformLayer;
import org.eclipse.draw2d.FreeformLayout;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.MarginBorder;
import org.eclipse.gef.DragTracker;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.LayerConstants;
import org.eclipse.gef.Request;
import org.eclipse.gef.requests.SelectionRequest;
import org.eclipse.gef.tools.DeselectAllTracker;
import org.eclipse.gef.tools.MarqueeDragTracker;

/**
 * @author agreif
 *
 * TODO
 * 
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class FlowDiagramEditPart extends Flow4JContainerEditPart
	implements LayerConstants
{

	private IFile flowFile;

	
	/**
	 * Creates the editPart instance
	 * @param flowFile the flow file
	 */
	public FlowDiagramEditPart(IFile flowFile) {
		super();
		this.flowFile = flowFile;
	}




	/**
	 * @see net.orthanc.flow4j.designer.editparts.Flow4JEditPart#createAccessible()
	 */
	/*protected AccessibleEditPart createAccessible() {
		return new AccessibleGraphicalEditPart(){
			public void getName(AccessibleEvent e) {
				e.result = getFlowDiagram().toString();
			}
		};
	}*/


	/**
	 * Installs EditPolicies specific to this. 
	 * @see org.eclipse.gef.editparts.AbstractEditPart#createEditPolicies()
	 */
	protected void createEditPolicies() {
		super.createEditPolicies();
		//installEditPolicy(EditPolicy.NODE_ROLE, null);
		//installEditPolicy(EditPolicy.GRAPHICAL_NODE_ROLE, null);
		//installEditPolicy(EditPolicy.SELECTION_FEEDBACK_ROLE, null);
		//installEditPolicy(EditPolicy.COMPONENT_ROLE, new RootComponentEditPolicy());
	}


	/**
	 * @see org.eclipse.gef.EditPart#activate()
	 */
	public void activate(){
		if (isActive())
			return;
		super.activate();
		getFlowDiagram().addStructureChangeListener(this);
	}
	
	/**
	 * Makes the EditPart insensible to changes in the model
	 * by removing itself from the model's list of listeners.
	 */
	public void deactivate(){
		if (!isActive())
			return;
		super.deactivate();
		getFlowDiagram().removeStructureChangeListener(this);
	}




	/**
	 * Handles changes in properties of this. It is 
	 * activated through the PropertyChangeListener.
	 * It updates children, source and target connections,
	 * and the visuals of this based on the property
	 * changed.
	 * @see java.beans.PropertyChangeListener#propertyChange(java.beans.PropertyChangeEvent)
	 *
	 * @param evt  Event which details the property change.
	 */
	public void propertyChange(PropertyChangeEvent evt) {
		String propName = evt.getPropertyName();
		if (FlowDiagramModelPart.CHILDREN.equals(propName))
			refreshChildren();
	}
	


	/**
	 * @see org.eclipse.gef.EditPart#getDragTracker(org.eclipse.gef.Request)
	 */
	public DragTracker getDragTracker(Request req) {
		if (req instanceof SelectionRequest 
			&& ((SelectionRequest)req).getLastButtonPressed() == 3)
				return new DeselectAllTracker(this);
		return new MarqueeDragTracker();
	}





	/**
	 * Returns the model of this as a FlowDiagramModelPart.
	 *
	 * @return  FlowDiagramModelPart of this.
	 */
	protected FlowDiagramModelPart getFlowDiagram() {
		return (FlowDiagramModelPart)getModel();
	}





	/**
	 * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#createFigure()
	 */
	protected IFigure createFigure() {
		Figure f = new FreeformLayer();
		f.setLayoutManager(new FreeformLayout());
		f.setBorder(new MarginBorder(5));
		f.setBackgroundColor(ColorConstants.listBackground);
		f.setOpaque(true);
		return f;
	}

	

	/**
	 * @see org.eclipse.gef.editparts.AbstractEditPart#refreshVisuals()
	 */
	protected void refreshVisuals() {
		super.refreshVisuals();
		ConnectionLayer cLayer = (ConnectionLayer)getLayer(CONNECTION_LAYER);
		AutomaticRouter router = new FanRouter();
		router.setNextRouter(new BendpointConnectionRouter());
		cLayer.setConnectionRouter(router);
	}






	/* (non-Javadoc)
	 * @see org.eclipse.gef.editparts.AbstractEditPart#addChild(org.eclipse.gef.EditPart, int)
	 */
	protected void addChild(EditPart child, int index) {
		// TODO Auto-generated method stub
		super.addChild(child, index);
	}

	/**
	 * Returns the file of this flow diagram
	 * @return the file of this flow diagram
	 */
	public IFile getFlowFile() {
		return flowFile;
	}

}