Common parameters for all modes

Link style (CL)

When the layout algorithm moves the nodes, straight-line links, such as instances of IlvLinkImage, automatically “follow” the new positions of their end nodes. If the grapher contains other types of links (for example, IlvPolylineLinkImage or IlvSplineLinkImage), the shape of the link might not be appropriate because the intermediate points of the link is not moved. In this case, you can ask the layout algorithm to automatically remove all the intermediate points of the links (if any).

Example of specifying automatic removal of all intermediate points of the links (CL algorithm)

To specify that the layout algorithm automatically removes all the intermediate points of the links (if any):

In CSS

Add to the GraphLayout section:

linkStyle : "STRAIGHT_LINE_STYLE";

In Java

Use the method:

void setLinkStyle(int style)

The valid values for style are:

IlvCircularLayout.NO_RESHAPE_STYLE

None of the links is reshaped in any way.
IlvCircularLayout.STRAIGHT_LINE_STYLE

All the intermediate points of the links (if any) are removed. It is the default value.

Note

The layout algorithm may raise an IlvInappropriateLinkException if layout is performed on an IlvGrapher, but inappropriate link classes or link connector classes are used. See Layout exceptions for details and solutions to this problem.

Connect links to node center (CL)

This feature is shared by all subclasses of the Basic Link Style Layout. See Connect links to node center for details.

Multilink and self-link features (CL)

These features are shared by all subclasses of the Basic Link Style Layout. See Multilink and self-link features for details.

Using a link clipping interface with the Circular Layout

By default, the Circular Layout does not place the connection points of links. It relies on the link connectors of the nodes to determine the connection points. If no link connectors are installed at the nodes, the default behavior is to connect to a point at the border of the bounding box of the nodes.

If the node has a shape other than rectangular, such as a triangle, rhombus, or circle, you may want the connection points to be placed exactly on the border of the shape. This can be achieved by specifying a link clip interface. The link clip interface allows you to correct the calculated connection point so that it lies on the border of the shape.

The following figure shows an example of link clipping.

Picture
of a layout without link clipping and with link clipping

Effect of link clipping interface

You can modify the position of the connection points of the links by providing a class that implements the IlvLinkClipInterface. An example for the implementation of a link clip interface is in Link clipping.

Example of setting a link clip interface (CL algorithm)

To set a link clip interface:

In Java

Use the method:

void setLinkClipInterface(IlvLinkClipInterface interface)

Note

The link clip interface requires link connectors at the nodes of an IlvGrapher that allow connector pins to be placed freely at the node border. It is recommended that you use IlvFreeLinkConnector or IlvClippingLinkConnector for link connectors to be used in combination with IlvGrapher objects. The clip link connector updates the clipped connection points automatically during interactive node movements.