Examples of com.mxgraph.model.mxGraphModel

com.mxgraph.model.mxGraphModel
Extends mxEventSource to implement a graph model. The graph model acts as a wrapper around the cells which are in charge of storing the actual graph datastructure. The model acts as a transactional wrapper with event notification for all changes, whereas the cells contain the atomic operations for updating the actual datastructure. Layers: The cell hierarchy in the model must have a top-level root cell which contains the layers (typically one default layer), which in turn contain the top-level cells of the layers. This means each cell is contained in a layer. If no layers are required, then all new cells should be added to the default layer. Layers are useful for hiding and showing groups of cells, or for placing groups of cells on top of other cells in the display. To identify a layer, the function is used. It returns true if the parent of the given cell is the root of the model. This class fires the following events: mxEvent.CHANGE fires when an undoable edit is dispatched. The edit property contains the mxUndoableEdit. The changes property contains the list of undoable changes inside the undoable edit. The changes property is deprecated, please use edit.getChanges() instead. mxEvent.EXECUTE fires between begin- and endUpdate and after an atomic change was executed in the model. The change property contains the atomic change that was executed. mxEvent.BEGIN_UPDATE fires after the updateLevel was incremented in beginUpdate. This event contains no properties. mxEvent.END_UPDATE fires after the updateLevel was decreased in endUpdate but before any notification or change dispatching. The edit property contains the current mxUndoableEdit. mxEvent.BEFORE_UNDO fires before the change is dispatched after the update level has reached 0 in endUpdate. The edit property contains the current mxUndoableEdit. mxEvent.UNDO fires after the change was dispatched in endUpdate. The edit property contains the current mxUndoableEdit.

  /**
   * Constructs a new model codec.
   */
  public mxModelCodec()
  {
    this(new mxGraphModel());
  }

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  protected void encodeObject(mxCodec enc, Object obj, Node node)
  {
    if (obj instanceof mxGraphModel)
    {
      Node rootNode = enc.document.createElement("root");
      mxGraphModel model = (mxGraphModel) obj;
      enc.encodeCell((mxICell) model.getRoot(), rootNode, true);
      node.appendChild(rootNode);
    }
  }

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  public Node beforeDecode(mxCodec dec, Node node, Object into)
  {
    if (node instanceof Element)
    {
      Element elt = (Element) node;
      mxGraphModel model = null;


      if (into instanceof mxGraphModel)
      {
        model = (mxGraphModel) into;
      }
      else
      {
        model = new mxGraphModel();
      }


      // Reads the cells into the graph model. All cells
      // are children of the root element in the node.
      Node root = elt.getElementsByTagName("root").item(0);
      mxICell rootCell = null;


      if (root != null)
      {
        Node tmp = root.getFirstChild();


        while (tmp != null)
        {
          mxICell cell = dec.decodeCell(tmp, true);


          if (cell != null && cell.getParent() == null)
          {
            rootCell = cell;
          }


          tmp = tmp.getNextSibling();
        }


        root.getParentNode().removeChild(root);
      }


      // Sets the root on the model if one has been decoded
      if (rootCell != null)
      {
        model.setRoot(rootCell);
      }
    }


    return node;
  }

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   * @param model Model that contains the graph data
   */
  public mxGraph(mxIGraphModel model, mxStylesheet stylesheet)
  {
    selectionModel = createSelectionModel();
    setModel((model != null) ? model : new mxGraphModel());
    setStylesheet((stylesheet != null) ? stylesheet : createStylesheet());
    setView(createGraphView());
  }

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   * @param model Model that contains the graph data
   */
  public mxGraph(mxIGraphModel model, mxStylesheet stylesheet)
  {
    selectionModel = createSelectionModel();
    setModel((model != null) ? model : new mxGraphModel());
    setStylesheet((stylesheet != null) ? stylesheet : createStylesheet());
    setView(createGraphView());
  }

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  public static boolean isCyclicUndirected(mxAnalysisGraph aGraph)
  {
    mxGraph graph = aGraph.getGraph();
    mxIGraphModel model = graph.getModel();
    Object[] cells = model.cloneCells(aGraph.getChildCells(graph.getDefaultParent(), true, true), true);
    mxGraphModel modelCopy = new mxGraphModel();
    mxGraph graphCopy = new mxGraph(modelCopy);
    Object parentCopy = graphCopy.getDefaultParent();
    graphCopy.addCells(cells);
    //    mxAnalysisGraph aGraphCopy = new mxAnalysisGraph(graphCopy, aGraph.getGenerator(), aGraph.getProperties());
    mxAnalysisGraph aGraphCopy = new mxAnalysisGraph();

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  public static boolean isCyclicDirected(mxAnalysisGraph aGraph)
  {
    mxGraph graph = aGraph.getGraph();
    mxIGraphModel model = graph.getModel();
    Object[] cells = model.cloneCells(aGraph.getChildCells(graph.getDefaultParent(), true, true), true);
    mxGraphModel modelCopy = new mxGraphModel();
    mxGraph graphCopy = new mxGraph(modelCopy);
    Object parentCopy = graphCopy.getDefaultParent();
    graphCopy.addCells(cells);
    mxAnalysisGraph aGraphCopy = new mxAnalysisGraph();
    aGraphCopy.setGraph(graphCopy);

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    mxIGraphModel model = graph.getModel();


    if (aGraph.getEdges(vertex, null, true, true, false, true).length >= 2)
    {
      Object[] cells = model.cloneCells(aGraph.getChildCells(graph.getDefaultParent(), true, true), true);
      mxGraphModel modelCopy = new mxGraphModel();
      mxGraph graphCopy = new mxGraph(modelCopy);
      graphCopy.addCells(cells);
      mxAnalysisGraph aGraphCopy = new mxAnalysisGraph();
      aGraphCopy.setGraph(graphCopy);
      aGraphCopy.setGenerator(aGraph.getGenerator());

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    int destValue = (int) costFunction.getCost(new mxCellState(view, aGraph.getTerminal(edge, false), null));


    if (aGraph.getTerminal(edge, false) != null || aGraph.getTerminal(edge, true) != null)
    {
      Object[] cells = model.cloneCells(aGraph.getChildCells(graph.getDefaultParent(), true, true), true);
      mxGraphModel modelCopy = new mxGraphModel();
      mxGraph graphCopy = new mxGraph(modelCopy);
      graphCopy.addCells(cells);
      mxAnalysisGraph aGraphCopy = new mxAnalysisGraph();
      aGraphCopy.setGraph(graphCopy);
      aGraphCopy.setGenerator(aGraph.getGenerator());
      aGraphCopy.setProperties(aGraph.getProperties());


      Object[] edges = aGraphCopy.getChildEdges(aGraphCopy.getGraph().getDefaultParent());
      Object currEdge = edges[0];
      mxCostFunction costFunctionCopy = aGraphCopy.getGenerator().getCostFunction();
      mxGraphView viewCopy = graphCopy.getView();


      int currSrcValue = (int) costFunctionCopy.getCost(new mxCellState(viewCopy, aGraphCopy.getTerminal(currEdge, true), null));
      int currDestValue = (int) costFunctionCopy.getCost(new mxCellState(viewCopy, aGraphCopy.getTerminal(currEdge, false), null));
      int i = 0;


      while (currSrcValue != srcValue || currDestValue != destValue)
      {
        i++;
        currEdge = edges[i];
        currSrcValue = Integer.parseInt((String) modelCopy.getValue(aGraphCopy.getTerminal(currEdge, true)));
        currDestValue = Integer.parseInt((String) modelCopy.getValue(aGraphCopy.getTerminal(currEdge, false)));
      }


      graphCopy.removeCells(new Object[] { currEdge }, true);
      Object[][] oldComponents = getGraphComponents(aGraph);
      Object[][] newComponents = getGraphComponents(aGraphCopy);

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  /**
   * Constructs a new model codec.
   */
  public mxModelCodec()
  {
    this(new mxGraphModel());
  }

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Related Classes of com.mxgraph.model.mxGraphModel

com.mxgraph.analysis.mxGraphStructure

com.mxgraph.io.mxModelCodec

com.mxgraph.util.mxEventObject

com.mxgraph.util.mxPoint

com.mxgraph.util.mxUndoableEdit

com.mxgraph.view.mxGraph

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