eu.geclipse.workflow.ui.edit.policies.WorkflowJobDragDropEditPolicy.java Source code

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Here is the source code for eu.geclipse.workflow.ui.edit.policies.WorkflowJobDragDropEditPolicy.java

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/*******************************************************************************
 * Copyright (c) 2008 g-Eclipse Consortium 
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0 
 * which accompanies this distribution, and is available at 
 * http://www.eclipse.org/legal/epl-v10.html 
 * 
 * Initial development of the original code was made for the g-Eclipse project 
 * funded by European Union project number: FP6-IST-034327 
 * http://www.geclipse.eu/
 *  
 * Contributors:
 *     RUR (http://acet.rdg.ac.uk/)
 *     - David Johnson - initial API and implementation
 ******************************************************************************/
package eu.geclipse.workflow.ui.edit.policies;

import java.util.List;

import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.CompoundCommand;
import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.DragDropEditPolicy;
import org.eclipse.gmf.runtime.diagram.ui.requests.DropObjectsRequest;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;

import eu.geclipse.jsdl.JSDLJobDescription;
import eu.geclipse.workflow.model.IWorkflowJob;
import eu.geclipse.workflow.ui.edit.commands.CopyJobDescToWorkflowCommand;
import eu.geclipse.workflow.ui.edit.commands.UpdateJobPortsCommand;
import eu.geclipse.workflow.ui.edit.parts.WorkflowJobEditPart;
import eu.geclipse.workflow.ui.part.Messages;

/**
 * @author david
 */
public class WorkflowJobDragDropEditPolicy extends DragDropEditPolicy {

    private WorkflowJobEditPart selectedElement = null;

    /*
     * (non-Javadoc)
     * @see
     * org.eclipse.gmf.runtime.diagram.ui.editpolicies.DiagramDragDropEditPolicy
     * #getDropObjectsCommand
     * (org.eclipse.gmf.runtime.diagram.ui.requests.DropObjectsRequest)
     */
    @SuppressWarnings("unchecked")
    @Override
    public Command getDropObjectsCommand(DropObjectsRequest dropRequest) {
        List objects = dropRequest.getObjects();
        CompoundCommand cmd = new CompoundCommand();
        JSDLJobDescription jsdl = null;

        for (Object o : objects) {

            if (o instanceof JSDLJobDescription) {
                jsdl = (JSDLJobDescription) o;
                this.selectedElement = (WorkflowJobEditPart) getHost();
                IWorkflowJob selectedJob = (IWorkflowJob) this.selectedElement.resolveSemanticElement();

                CopyJobDescToWorkflowCommand copyCmd = new CopyJobDescToWorkflowCommand(
                        this.selectedElement.resolveSemanticElement(), jsdl);
                UpdateJobPortsCommand updatePortsCmd = new UpdateJobPortsCommand(this.selectedElement, jsdl);

                if (!(selectedJob.getName() == null && selectedJob.getJobDescription() == null)) {
                    MessageDialog confirmDialog = new MessageDialog(null,
                            Messages.getString("WorkflowJobDragDropEditPolicy_confirmationTitle"), //$NON-NLS-1$
                            null, Messages.getString("WorkflowJobDragDropEditPolicy_userPrompt"), //$NON-NLS-1$
                            true ? MessageDialog.QUESTION : MessageDialog.WARNING,
                            new String[] { IDialogConstants.YES_LABEL, IDialogConstants.NO_LABEL }, 0);
                    int result = confirmDialog.open();
                    if (result == 0) {
                        cmd.add(new ICommandProxy(copyCmd));
                        cmd.add(new ICommandProxy(updatePortsCmd));
                    }
                } else {
                    cmd.add(new ICommandProxy(copyCmd));
                    cmd.add(new ICommandProxy(updatePortsCmd));
                }
            }

            return cmd;
        }
        return super.getDropObjectsCommand(dropRequest);
    }
}