anchors.js

var mxgraph = require("../../../dist/build")({
      mxImageBasePath: "../../src/images",
      mxBasePath: "../../src"
    }),
    mxGraph = mxgraph.mxGraph,
    mxShape = mxgraph.mxShape,
    mxConnectionConstraint = mxgraph.mxConnectionConstraint,
    mxPoint = mxgraph.mxPoint,
    mxPolyline = mxgraph.mxPolyline,
    mxEvent = mxgraph.mxEvent,
    mxRubberband = mxgraph.mxRubberband,
    mxCellState = mxgraph.mxCellState;

window.onload = function () {
  // Overridden to define per-shape connection points
  mxGraph.prototype.getAllConnectionConstraints = function(terminal, source)
  {
    if (terminal != null && terminal.shape != null)
    {
      if (terminal.shape.stencil != null)
      {
        if (terminal.shape.stencil.constraints != null)
        {
          return terminal.shape.stencil.constraints;
        }
      }
      else if (terminal.shape.constraints != null)
      {
        return terminal.shape.constraints;
      }
    }

    return null;
  };

  // Defines the default constraints for all shapes
  mxShape.prototype.constraints = [new mxConnectionConstraint(new mxPoint(0.25, 0), true),
                   new mxConnectionConstraint(new mxPoint(0.5, 0), true),
                   new mxConnectionConstraint(new mxPoint(0.75, 0), true),
                               new mxConnectionConstraint(new mxPoint(0, 0.25), true),
                               new mxConnectionConstraint(new mxPoint(0, 0.5), true),
                               new mxConnectionConstraint(new mxPoint(0, 0.75), true),
                             new mxConnectionConstraint(new mxPoint(1, 0.25), true),
                             new mxConnectionConstraint(new mxPoint(1, 0.5), true),
                             new mxConnectionConstraint(new mxPoint(1, 0.75), true),
                             new mxConnectionConstraint(new mxPoint(0.25, 1), true),
                             new mxConnectionConstraint(new mxPoint(0.5, 1), true),
                             new mxConnectionConstraint(new mxPoint(0.75, 1), true)];

  // Edges have no connection points
  mxPolyline.prototype.constraints = null;

  // Program starts here. Creates a sample graph in the
  // DOM node with the specified ID. This function is invoked
  // from the onLoad event handler of the document (see below).
  function main(container)
  {
    // Disables the built-in context menu
    mxEvent.disableContextMenu(container);

    // Creates the graph inside the given container
    var graph = new mxGraph(container);
    graph.setConnectable(true);

    // Enables connect preview for the default edge style
    graph.connectionHandler.createEdgeState = function(me)
    {
      var edge = graph.createEdge(null, null, null, null, null);

      return new mxCellState(this.graph.view, edge, this.graph.getCellStyle(edge));
    };

    // Specifies the default edge style
    graph.getStylesheet().getDefaultEdgeStyle()['edgeStyle'] = 'orthogonalEdgeStyle';

    // Enables rubberband selection
    new mxRubberband(graph);

    // Gets the default parent for inserting new cells. This
    // is normally the first child of the root (ie. layer 0).
    var parent = graph.getDefaultParent();

    // Adds cells to the model in a single step
    graph.getModel().beginUpdate();
    try
    {
      var v1 = graph.insertVertex(parent, null, 'Hello,', 20, 20, 80, 30);
      var v2 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 30);
      var e1 = graph.insertEdge(parent, null, '', v1, v2);
    }
    finally
    {
      // Updates the display
      graph.getModel().endUpdate();
    }
  };

  main(document.getElementById('graphContainer'));
};