Eclipse GEF and Draw2d Plug-in Developer Guide (Galileo) - MidpointLocator (Eclipse Draw2d API Specification)

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Eclipse Draw2d
3.3

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org.eclipse.draw2d
Class MidpointLocator

java.lang.Object
  

org.eclipse.draw2d.AbstractLocator
      

org.eclipse.draw2d.ConnectionLocator
          
org.eclipse.draw2d.MidpointLocator

All Implemented Interfaces:: Locator

public class MidpointLocator
extends ConnectionLocator

A ConnectionLocator that is used to place figures at the midpoint between two points on a Connection.

Field Summary

Fields inherited from class org.eclipse.draw2d. ConnectionLocator

END, MIDDLE, MIDPOINT, SOURCE, START, TARGET

Constructor Summary

MidpointLocator ( Connection c, int i)
          Constructs a MidpointLocator with associated Connection c and index i.

Method Summary

protected int getIndex ()
          Returns this MidpointLocator's index.

protected Point getReferencePoint ()
          Returns the point of reference associated with this locator.

Methods inherited from class org.eclipse.draw2d. ConnectionLocator

getAlignment, getConnection, getLocation, setAlignment, setConnection

Methods inherited from class org.eclipse.draw2d. AbstractLocator

getGap, getNewBounds, getRelativePosition, relocate, setGap, setRelativePosition

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MidpointLocator

public MidpointLocator(
Connection c,
                       int i)

Constructs a MidpointLocator with associated Connection c and index i. The points at index i and i+1 on the connection are used to calculate the midpoint of the line segment.
Parameters:: c - the connection associated with the locator; i - the point from where the connection's midpoint will be calculated.
Since:: 2.0

Method Detail

getIndex

protected int getIndex()

Returns this MidpointLocator's index. This integer represents the position of the start point in this MidpointLocator's associated Connection from where midpoint calculation will be made.