flowdiagramelementeditpart.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.editparts.policies.FlowDiagramElementEditPolicy;
import net.orthanc.flow4j.designer.model.FlowDiagramElementModelPart;

import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.GraphicalEditPart;

/**
 * @author agreif
 *
 * TODO
 * 
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public abstract class FlowDiagramElementEditPart extends Flow4JEditPart {



	/* (non-Javadoc)
	 * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#createFigure()
	 */
	protected IFigure createFigure() {
		// TODO Auto-generated method stub
		return null;
	}


	/**
	 * @see org.eclipse.gef.editparts.AbstractEditPart#createEditPolicies()
	 */
	protected void createEditPolicies() {
		super.createEditPolicies();
		installEditPolicy(EditPolicy.COMPONENT_ROLE, new FlowDiagramElementEditPolicy());
//		removeEditPolicy(EditPolicy.SELECTION_FEEDBACK_ROLE);

	}


	/**
	 * Returns the diagram element's tool tip of type<code>IFlow4JToolTip</code>.
	 * @return the diagram element's tool tip of type<code>IFlow4JToolTip</code>.
	 */
	public IFlow4JToolTip getFlowDiagramElementToolTip() {
		return (IFlow4JToolTip)getFigure().getToolTip();
	}


	/**
	 * Returns the model instance.
	 * @return the model instance.
	 */
	private FlowDiagramElementModelPart getFlowDiagramElement() {
		return (FlowDiagramElementModelPart)getModel();
	}


	/**
	 * Register the editPart as a property change listener of the 
	 * modelPart
	 * @see org.eclipse.gef.EditPart#activate()
	 */
	public void activate() {
		if (isActive())
			return;
		super.activate();
		getFlowDiagramElement().addPropertyChangeListener(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();
		getFlowDiagramElement().removePropertyChangeListener(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.
	 * @param evt  Event which details the property change.
	 * @see java.beans.PropertyChangeListener#propertyChange(java.beans.PropertyChangeEvent)
	 *
	 */
	public void propertyChange(PropertyChangeEvent evt) {
		String propName = evt.getPropertyName();
		if (FlowDiagramElementModelPart.PROP_LOCATION.equals(propName))
			refreshVisuals();
//		else
//			System.out.println(this.getClass().getName() + "(FlowDiagramElementEditPart).propertyChange() unknown propName: " + propName);
	}
	



	/**
	 * Updates the visual aspect of this. 
	 * @see org.eclipse.gef.editparts.AbstractEditPart#refreshVisuals()
	 */
	protected void refreshVisuals() {
		super.refreshVisuals();
		Point point = getFlowDiagramElement().getLocation();
		//Dimension size = getFlow4JModelPart().getSize();
		Rectangle r = new Rectangle(point.x, point.y, -1, -1);	//	prefered size
	
		((GraphicalEditPart) getParent()).setLayoutConstraint(this, getFigure(), r);
	}
	
	


}