Ptidej-v5.2-master/PADL Creator JavaFile (Eclipse) Tests/data/argouml/trunk/src_new/org/argouml/uml/diagram/ui/ActionAddMessage.java
// $Id$
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package org.argouml.uml.diagram.ui;

import java.awt.event.ActionEvent;

import javax.swing.Action;

import org.argouml.application.helpers.ResourceLoaderWrapper;
import org.argouml.i18n.Translator;
import org.argouml.model.Model;
import org.argouml.ui.targetmanager.TargetManager;
import org.tigris.gef.base.Editor;
import org.tigris.gef.base.Globals;
import org.tigris.gef.base.Layer;
import org.tigris.gef.graph.GraphModel;
import org.tigris.gef.graph.GraphNodeRenderer;
import org.tigris.gef.presentation.FigNode;
import org.tigris.gef.undo.UndoableAction;

/**
 * Action to add a message.
 * @stereotype singleton
 */
public class ActionAddMessage extends UndoableAction {

    ////////////////////////////////////////////////////////////////
    // static variables

    private static ActionAddMessage singleton = new ActionAddMessage();


    ////////////////////////////////////////////////////////////////
    // constructors

    /**
     * The constructor.
     */
    private ActionAddMessage() {
        super(Translator.localize("action.add-message"),
                ResourceLoaderWrapper.lookupIcon("action.add-message"));
        // Set the tooltip string:
        putValue(Action.SHORT_DESCRIPTION, 
                Translator.localize("action.add-message"));
    }


    ////////////////////////////////////////////////////////////////
    // main methods

    /**
     * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
     */
    public void actionPerformed(ActionEvent ae) {
        super.actionPerformed(ae);
    	Object target =  TargetManager.getInstance().getModelTarget();

    	if (!(Model.getFacade().isAAssociationRole(target))
	    && Model.getFacade().isACollaboration(Model.getFacade()
                .getNamespace(target))) {
    	    return;
    	}
        // So, the target is a MAssociationRole
    	this.addMessage(target);
    }

    /**
     * Add a message to an associationRole: it builds it using the
     * Factory method and then it creates the Fig and adds it to the
     * diagram.
     *
     * @param associationrole the associationRole to which the new message
     *                        must be added
     */
    private void addMessage(Object associationrole) {
        Object collaboration = Model.getFacade().getNamespace(associationrole);
        Object message =
            Model.getCollaborationsFactory()
            	.buildMessage(collaboration, associationrole);
        Editor e = Globals.curEditor();
        GraphModel gm = e.getGraphModel();
        Layer lay = e.getLayerManager().getActiveLayer();
        GraphNodeRenderer gr = e.getGraphNodeRenderer();
        FigNode figMsg = gr.getFigNodeFor(gm, lay, message, null);
        ((FigMessage) figMsg).addPathItemToFigAssociationRole(lay);

        gm.getNodes().add(message); /*MVW This is not the correct way,
        * but it allows connecting a CommentEdge to it!
        * See e.g. ActionAddNote for the correct way.
        * Testcase:
        * 1. Select the message.
        * 2. Click the Comment tool.
        * */

        TargetManager.getInstance().setTarget(message);
    }

    /**
     * @see org.tigris.gef.undo.UndoableAction#isEnabled()
     */
    public boolean isEnabled() {
	Object target =  TargetManager.getInstance().getModelTarget();
	return super.isEnabled()
	    && Model.getFacade().isAAssociationRole(target);
    }

    /**
     * @return Returns the singleton.
     */
    public static ActionAddMessage getSingleton() {
        return singleton;
    }
}  /* end class ActionAddMessage */
