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Interface CH.ifa.draw.framework.ConnectionFigure

public interface interface ConnectionFigure

extends Figure, FigureChangeListener

A ConnectionFigure can have multiple segments. It provides operations to split and join segments.

Strategy
Strategy is used encapsulate the algorithm to locate the connection point. ConnectionFigure is the Strategy context and Connector is the Strategy.
Observer
Observer is used to track changes of the connected figures. A connection figure registers itself as listeners or observers of the source and target connector.

See Also:

Connector

canConnect(Figure, Figure)

Checks if two figures can be connected.

connectEnd(Connector)

Sets the end Connector of the connection.

connectsSame(ConnectionFigure)

Checks if the ConnectionFigure connects the same figures.

connectStart(Connector)

Sets the start Connector of the connection.

disconnectEnd()

Disconnects the end figure from the dependent figure

disconnectStart()

Disconnects the start figure from the dependent figure

end()

Gets the end Connector.

endPoint()

Gets the end point.

endPoint(int, int)

Sets the end point.

joinSegments(int, int)

Joins the hit segments.

pointAt(int)

Gets the Point at the given position

pointCount()

Gets the number of points or nodes of the connection

setPointAt(Point, int)

Sets the position of the point at the given position

splitSegment(int, int)

Splits the hit segment.

start()

Gets the start Connector

startPoint()

Gets the start point.

startPoint(int, int)

Sets the start point.

updateConnection()

Updates the connection

 public abstract void connectStart(Connector start)

Sets the start Connector of the connection.

Parameters:

figure - the start figure of the connection

 public abstract void connectEnd(Connector end)

Sets the end Connector of the connection.

Parameters:

figure - the end figure of the connection

 public abstract void updateConnection()

Updates the connection

 public abstract void disconnectStart()

Disconnects the start figure from the dependent figure

 public abstract void disconnectEnd()

Disconnects the end figure from the dependent figure

 public abstract Connector start()

Gets the start Connector

 public abstract Connector end()

Gets the end Connector.

 public abstract boolean canConnect(Figure start,
                                    Figure end)

Checks if two figures can be connected. Implement this method to constrain the allowed connections between figures.

 public abstract boolean connectsSame(ConnectionFigure other)

Checks if the ConnectionFigure connects the same figures.

 public abstract void startPoint(int x,
                                 int y)

Sets the start point.

 public abstract void endPoint(int x,
                               int y)

Sets the end point.

 public abstract Point startPoint()

Gets the start point.

 public abstract Point endPoint()

Gets the end point.

 public abstract void setPointAt(Point p,
                                 int index)

Sets the position of the point at the given position

 public abstract Point pointAt(int index)

Gets the Point at the given position

 public abstract int pointCount()

Gets the number of points or nodes of the connection

 public abstract int splitSegment(int x,
                                  int y)

Splits the hit segment.

Parameters:

x, - y the position where the figure should be split

Returns:

the index of the splitting point

 public abstract boolean joinSegments(int x,
                                      int y)

Joins the hit segments.

Parameters:

x, - y the position where the figure should be joined.

Returns:

whether the segment was joined

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