mxEdgeStyle

Provides various edge styles to be used as the values for mxConstants.STYLE_EDGE in a cell style.

Example

var style = stylesheet.getDefaultEdgeStyle();
style[mxConstants.STYLE_EDGE] = mxEdgeStyle.ElbowConnector;

Sets the default edge style to ElbowConnector.

Custom edge style

To write a custom edge style, a function must be added to the mxEdgeStyle object as follows:

mxEdgeStyle.MyStyle = function(state, source, target, points, result)
{
  if (source != null && target != null)
  {
    var pt = new mxPoint(target.getCenterX(), source.getCenterY());

    if (mxUtils.contains(source, pt.x, pt.y))
    {
      pt.y = source.y + source.height;
    }

    result.push(pt);
  }
};

In the above example, a right angle is created using a point on the horizontal center of the target vertex and the vertical center of the source vertex.  The code checks if that point intersects the source vertex and makes the edge straight if it does.  The point is then added into the result array, which acts as the return value of the function.

The new edge style should then be registered in the mxStyleRegistry as follows

mxStyleRegistry.putValue('myEdgeStyle', mxEdgeStyle.MyStyle);

The custom edge style above can now be used in a specific edge as follows

model.setStyle(edge, 'edgeStyle=myEdgeStyle');

Note that the key of the mxStyleRegistry entry for the function should be used in string values, unless mxGraphView.allowEval is true, in which case you can also use mxEdgeStyle.MyStyle for the value in the cell style above.

Or it can be used for all edges in the graph as follows

var style = graph.getStylesheet().getDefaultEdgeStyle();
style[mxConstants.STYLE_EDGE] = mxEdgeStyle.MyStyle;

Note that the object can be used directly when programmatically setting the value, but the key in the mxStyleRegistry should be used when setting the value via a key, value pair in a cell style.