view java/src/uk/ac/qmul/eecs/ccmi/gui/Diagram.java @ 8:ea7885bd9bff tip

fixed bug : render solid line as dotted/dashed when moving the stylus from dotted/dashed to solid

/*  
 CCmI Editor - A Collaborative Cross-Modal Diagram Editing Tool
  
 Copyright (C) 2011  Queen Mary University of London (http://ccmi.eecs.qmul.ac.uk/)

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package uk.ac.qmul.eecs.ccmi.gui;

import java.awt.geom.Point2D;
import java.util.Set;

import uk.ac.qmul.eecs.ccmi.diagrammodel.CollectionModel;
import uk.ac.qmul.eecs.ccmi.diagrammodel.DiagramElement;
import uk.ac.qmul.eecs.ccmi.diagrammodel.DiagramModel;
import uk.ac.qmul.eecs.ccmi.diagrammodel.DiagramTreeNode;
import uk.ac.qmul.eecs.ccmi.diagrammodel.NodeProperties;
import uk.ac.qmul.eecs.ccmi.diagrammodel.TreeModel;
import uk.ac.qmul.eecs.ccmi.gui.persistence.PrototypePersistenceDelegate;
import uk.ac.qmul.eecs.ccmi.network.AwarenessMessage;
import uk.ac.qmul.eecs.ccmi.network.DiagramEventActionSource;

/**
 * The {@code Diagram} class holds all the data needed for a representation of the diagram. It is used by component classes 
 * such as {@link GraphPanel} and {@link DiagramTree} to draw the diagram by accessing the diagram model or by 
 * {@link EditorTabbedPane} to assign a title to the tabs out of the diagram name. 
 *
 */
public abstract class Diagram implements Cloneable {
	
	/**
	 * Crates a new instance of a Diagram. The diagram created through this method is not shared with any peer via 
	 * a server. 
	 * @param name the name of the diagram.
	 * @param nodes an array of node prototypes. Nodes inserted by users in the diagram will be created by cloning these nodes. 
	 * @param edges an array of edge prototypes. Edges inserted by users in the diagram will be created by cloning these edges.
	 * @param prototypePersistenceDelegate a delegate class to handle nodes and edges persistence.
	 * @return a new instance of {@code Diagram}
	 */
	public static Diagram newInstance(String name, Node[] nodes, Edge[] edges, PrototypePersistenceDelegate prototypePersistenceDelegate){
		return new LocalDiagram(name,nodes,edges,prototypePersistenceDelegate);
	}
	
	/**
	 * Returns the name of the diagram. The name identifies the diagram uniquely in the editor. There cannot
	 * be two diagrams with the same name open at the same time. This makes things easier when sharing diagrams
	 * with other users via the network.
	 * 
	 * @return the name of the diagram
	 */
	public abstract String getName();

	/**
	 * Assign this diagram a new name. 
	 * @param name the new name of the diagram
	 */
	public abstract void setName(String name);

	/**
	 * Returns an array with the node prototypes. Node prototypes are used when creating new node 
	 * instances via the {@code clone()} method. 
	 * 
	 * @return an array of nodes 
	 */
	public abstract Node[] getNodePrototypes();

	/**
	 * Returns an array with the edge prototypes. Edge prototypes are used when creating new edge 
	 * instances via the {@code clone()} method.
	 * 
	 * @return an array of edges
	 */
	public abstract Edge[] getEdgePrototypes();

	/**
	 * Returns the tree model of this diagram. Note that each diagram holds a {@code DiagramModel} 
	 * which has  two sub-models ({@code TreeModel} and {@code CollectionModel}). Changes on one 
	 * sub-model will affect the other model as well. 
	 * 
	 * @return the tree model of this diagram 
	 * 
	 * @see uk.ac.qmul.eecs.ccmi.diagrammodel.DiagramModel uk.ac.qmul.eecs.ccmi.diagrammodel.DiagramModel
	 */
	public abstract TreeModel<Node,Edge> getTreeModel();

	/**
	 * Returns the collection model of this diagram. Note that each diagram holds a {@code DiagramModel} 
	 * which has  two sub-models ({@code TreeModel} and {@code CollectionModel}). Changes on one 
	 * sub-model will affect the other model as well. 
	 * 
	 * @return the tree model of this diagram 
	 * 
	 * @see uk.ac.qmul.eecs.ccmi.diagrammodel.DiagramModel uk.ac.qmul.eecs.ccmi.diagrammodel.DiagramModel
	 */
	public abstract CollectionModel<Node,Edge> getCollectionModel();

	/**
	 * Returns the model updater of this diagram. The model updater is the delegate for all the 
	 * update operations affecting the diagram model.
	 * 
	 * @return the model updater for this diagram
	 */
	public abstract DiagramModelUpdater getModelUpdater();
	
	/**
	 * Returns the label of the diagram. The label is slightly different from the name as it's the string 
	 * appearing in the tabbed pane of the editor. It includes asterisk character at the end when the {@code DiagramModel}
	 * of this class has been changed and not  yet saved on hard disk.   
	 *  
	 * @return a label for this diagram
	 */
	public abstract String getLabel();
	
	/**
	 * Returns the delegates for this diagram for nodes and edges prototypes persistence. 
	 * When saving a diagram to an xml file each node and edge of the prototypes is encoded  
	 * in the xml file. Indeed the template of a diagram is made of of its prototypes. 
	 * In the template is held the general attributes common to all the nodes and edges, like 
	 * for instance the type of a node but not its current position. 
	 *  
	 * @return the PrototypePersistenceDelegate for this diagram 
	 */
	public abstract PrototypePersistenceDelegate getPrototypePersistenceDelegate();

	@Override
	public Object clone(){
		try {
			return super.clone();
		} catch (CloneNotSupportedException e) {
			throw new RuntimeException(e);
		}
	}
	
	private static class LocalDiagram extends Diagram {

		private LocalDiagram(String name, Node[] nodes, Edge[] edges,PrototypePersistenceDelegate prototypePersistenceDelegate){
			this.name = name;
			this.nodes = nodes;
			this.edges = edges;
			this.prototypePersistenceDelegate = prototypePersistenceDelegate;
			diagramModel = new DiagramModel<Node,Edge>(nodes,edges);
			innerModelUpdater = new InnerModelUpdater();
		}

		@Override
		public String getName(){
			return name;
		}

		@Override
		public void setName(String name){
			this.name = name;
		}

		@Override
		public Node[] getNodePrototypes(){
			return nodes;
		}

		@Override
		public Edge[] getEdgePrototypes(){
			return edges;
		}

		@Override
		public TreeModel<Node,Edge> getTreeModel(){
			return diagramModel.getTreeModel();
		}

		@Override
		public CollectionModel<Node,Edge> getCollectionModel(){
			return diagramModel.getDiagramCollection();
		}

		@Override
		public String getLabel(){
			return name;
		}
		
		@Override
		public DiagramModelUpdater getModelUpdater(){
			return innerModelUpdater;
		}
		
		@Override
		public String toString(){
			return name;
		}
		
		@Override
		public PrototypePersistenceDelegate getPrototypePersistenceDelegate(){
			return prototypePersistenceDelegate;
		}
		
		/**
		 * Creates a new {@code Diagram} by clonation.  
		 */
		@Override
		public Object clone(){
			LocalDiagram clone = (LocalDiagram)super.clone();
			clone.name = getName();
			clone.nodes = getNodePrototypes();
			clone.edges = getEdgePrototypes();
			/* constructor with no args makes just a dummy wrapper */
			clone.diagramModel = new DiagramModel<Node,Edge>(nodes,edges);
			clone.innerModelUpdater = clone.new InnerModelUpdater();
			return clone;
		}

		private DiagramModel<Node,Edge> diagramModel;
		private InnerModelUpdater innerModelUpdater;
		private PrototypePersistenceDelegate prototypePersistenceDelegate;
		private String name;
		private Node[] nodes;
		private Edge[] edges;

		private class InnerModelUpdater implements DiagramModelUpdater {

			@Override
			public boolean getLock(DiagramTreeNode treeNode, Lock lock, DiagramEventActionSource source) {
				/* using a non shared diagram requires no actual lock, therefore the answer is always yes */
				return true;
			}
			
			@Override
			public void yieldLock(DiagramTreeNode treeNode, Lock lock, DiagramEventActionSource actionSource) {}

			@Override 
			public void sendAwarenessMessage(AwarenessMessage.Name awMsgName, Object source){}
			
			@Override
			public void insertInCollection(DiagramElement element,DiagramEventSource source) {
				if(element instanceof Node)
					diagramModel.getDiagramCollection().insert((Node)element,source);
				else
					diagramModel.getDiagramCollection().insert((Edge)element,source);
			}

			@Override
			public void insertInTree(DiagramElement element) {
				if(element instanceof Node)
					diagramModel.getTreeModel().insertTreeNode((Node)element,DiagramEventSource.TREE);
				else
					diagramModel.getTreeModel().insertTreeNode((Edge)element,DiagramEventSource.TREE);
			}

			@Override
			public void takeOutFromCollection(DiagramElement element, DiagramEventSource source) {
				diagramModel.getDiagramCollection().takeOut(element,source);
			}

			@Override
			public void takeOutFromTree(DiagramElement element) {
				diagramModel.getTreeModel().takeTreeNodeOut(element,DiagramEventSource.TREE);
			}

			@Override
			public void setName(DiagramElement element, String name,DiagramEventSource source) {
				element.setName(name,source);
			}

			@Override
			public void setNotes(DiagramTreeNode treeNode, String notes,DiagramEventSource source) {
				diagramModel.getTreeModel().setNotes(treeNode, notes,source);
			}

			@Override
			public void setProperty(Node node, String type, int index,
					String value,DiagramEventSource source) {
				node.setProperty(type, index, value,source);
			}

			@Override
			public void setProperties(Node node, NodeProperties properties,DiagramEventSource source) {
				node.setProperties(properties,source);
			}

			@Override
			public void clearProperties(Node node,DiagramEventSource source) {
				node.clearProperties(source);
			}

			@Override
			public void addProperty(Node node, String type, String value,DiagramEventSource source) {
				node.addProperty(type, value,source);
			}

			@Override
			public void removeProperty(Node node, String type, int index,DiagramEventSource source) {
				node.removeProperty(type, index,source);
			}

			@Override
			public void setModifiers(Node node, String type, int index,
					Set<Integer> modifiers,DiagramEventSource source) {
				node.setModifierIndexes(type, index, modifiers,source);				
			}

			@Override
			public void setEndLabel(Edge edge, Node node, String label,DiagramEventSource source) {
				edge.setEndLabel(node, label,source);
			}

			@Override
			public void setEndDescription(Edge edge, Node node,
					int index,DiagramEventSource source) {
				edge.setEndDescription(node, index,source);
			}

			@Override
			public void translate(GraphElement ge, Point2D p, double x, double y,DiagramEventSource source) {
				ge.translate(p, x, y,source);
			}

			@Override
			public void startMove(GraphElement ge, Point2D p,DiagramEventSource source) {
				ge.startMove(p,source);
			}

			@Override
			public void bend(Edge edge, Point2D p,DiagramEventSource source) {
				edge.bend(p,source);
			}

			@Override
			public void stopMove(GraphElement ge,DiagramEventSource source) {
				ge.stopMove(source);
			}
		}
	}

}