org.jhotdraw.draw
Class LineConnectionFigure

java.lang.Object
  org.jhotdraw.beans.AbstractBean
      org.jhotdraw.draw.AbstractFigure
          org.jhotdraw.draw.AbstractAttributedFigure
              org.jhotdraw.draw.BezierFigure
                  org.jhotdraw.draw.LineFigure
                      org.jhotdraw.draw.LineConnectionFigure

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, ConnectionFigure, Figure, DOMStorable

Direct Known Subclasses:

DependencyFigure, LabeledLineConnectionFigure

public class LineConnectionFigure
extends LineFigure
implements ConnectionFigure

A LineConnection is a standard implementation of the ConnectionFigure interface. The interface is implemented with BezierFigure.

Version:

1.0.2 2007-05-02 Set connector variables directly when reading in connectors.
1.0.1 2006-02-06 Fixed redo bug.
1.0 23. Januar 2006 Created.

Author:

Werner Randelshofer

See Also:

Serialized Form

Field Summary

Fields inherited from class org.jhotdraw.draw.BezierFigure

path

Fields inherited from class org.jhotdraw.draw.AbstractFigure

changingDepth, listenerList

Fields inherited from class org.jhotdraw.beans.AbstractBean

propertySupport

Constructor Summary

LineConnectionFigure()
Creates a new instance.

Method Summary

void	addNotify(Drawing drawing) This method is invoked, when the Figure is being removed from a Drawing.
boolean	canConnect() Tests whether a figure can be a connection target.
boolean	canConnect(Connector start) Checks if this ConnectionFigure can be connect to the specified Connector.
boolean	canConnect(Connector start, Connector end) Returns true, if this ConnectionFigure can connect the specified Connectors.
LineConnectionFigure	clone() Returns a clone of the figure, with clones of all aggregated figures, such as chilrend and decorators.
java.util.Collection<Handle>	createHandles(int detailLevel) Gets the handles of the figure.
BezierPath	getBezierPath() FIXME - Liner must work with API of LineConnection!
Connector	getEndConnector() Gets the end Connector.
Figure	getEndFigure() Gets the end figure of the connection.
Liner	getLiner() Get a Liner object which encapsulated a lineout algorithm for this figure.
Connector	getStartConnector() Gets the start Connector.
Figure	getStartFigure() Gets the start figure of the connection.
protected void	handleConnect(Connector start, Connector end) Handles the connection of a connection.
protected void	handleDisconnect(Connector start, Connector end) Handles the disconnection of a connection.
boolean	handleMouseClick(java.awt.geom.Point2D.Double p, java.awt.event.MouseEvent evt, DrawingView view) Handles a mouse click.
void	lineout() A lineout algorithm is used to define how the child components should be laid out in relation to each other.
void	read(DOMInput in)
protected void	readLiner(DOMInput in)
protected void	readPoints(DOMInput in)
void	remap(java.util.Map oldToNew) After cloning a collection of figures, the ConnectionFigures contained in this collection still connect to the original figures instead of to the clones.
void	removeNotify(Drawing drawing) This method is invoked, when the Figure is being removed from a Drawing.
void	reverseConnection()
void	setEndConnector(Connector newEnd) Sets the end Connector of the connection.
void	setEndPoint(java.awt.geom.Point2D.Double p) Convenience method for setting the point coordinate of the end point.
void	setLiner(Liner newValue) Set a Liner object which encapsulated a lineout algorithm for this figure.
void	setNode(int index, BezierPath.Node p) Sets a control point.
void	setPoint(int index, java.awt.geom.Point2D.Double p) Sets the point coordinate of control point 0 at the specified node.
void	setStartConnector(Connector newStart) Sets the start Connector of the connection.
void	setStartPoint(java.awt.geom.Point2D.Double p) Convenience method for setting the point coordinate of the start point.
void	transform(java.awt.geom.AffineTransform tx) Ensures that a connection is updated if the connection was moved.
void	updateConnection() Updates the start and end point of the figure and fires figureChanged events.
void	validate()
void	write(DOMOutput out)
protected void	writeLiner(DOMOutput out)
protected void	writePoints(DOMOutput out)

Methods inherited from class org.jhotdraw.draw.BezierFigure

addNode, addNode, chop, contains, drawCaps, drawFill, drawStroke, findCompatibleConnector, findConnector, findNode, findSegment, getBounds, getCappedPath, getCenter, getDrawingArea, getEndPoint, getNode, getNodeCount, getOutermostPoint, getPoint, getPoint, getPointOnPath, getStartPoint, getTransformRestoreData, invalidate, isClosed, joinSegments, joinSegments, layout, removeAllNodes, removeNode, restoreTransformTo, setAttribute, setBezierPath, setBounds, setClosed, setPoint, splitSegment, splitSegment

Methods inherited from class org.jhotdraw.draw.AbstractAttributedFigure

applyAttributesTo, draw, drawText, getAttribute, getAttributeKey, getAttributes, getAttributesRestoreData, getStroke, getStrokeMiterLimitFactor, hasAttribute, isAttributeEnabled, readAttributes, removeAttribute, restoreAttributesTo, setAttributeEnabled, setAttributes, writeAttributes

Methods inherited from class org.jhotdraw.draw.AbstractFigure

addFigureListener, basicClone, changed, findFigureInside, fireAreaInvalidated, fireAreaInvalidated, fireAreaInvalidated, fireAttributeChanged, fireFigureAdded, fireFigureChanged, fireFigureChanged, fireFigureChanged, fireFigureHandlesChanged, fireFigureRemoved, fireFigureRequestRemove, fireUndoableEditHappened, getActions, getChangingDepth, getConnectors, getCursor, getDecomposition, getDrawing, getFontRenderContext, getLayer, getLock, getPreferredSize, getTool, getToolTipText, handleDrop, includes, isChanging, isRemovable, isSelectable, isTransformable, isVisible, remap, removeFigureListener, requestRemove, setBounds, setRemovable, setSelectable, setTransformable, setVisible, toString, willChange

Methods inherited from class org.jhotdraw.beans.AbstractBean

addPropertyChangeListener, addPropertyChangeListener, firePropertyChange, firePropertyChange, firePropertyChange, removePropertyChangeListener, removePropertyChangeListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jhotdraw.draw.ConnectionFigure

getEndPoint, getNode, getNodeCount, getPoint, getStartPoint

Methods inherited from interface org.jhotdraw.draw.Figure

addFigureListener, changed, contains, draw, findCompatibleConnector, findConnector, findFigureInside, getActions, getAttribute, getAttributes, getAttributesRestoreData, getBounds, getConnectors, getCursor, getDecomposition, getDrawingArea, getLayer, getPreferredSize, getTool, getToolTipText, getTransformRestoreData, handleDrop, includes, isRemovable, isSelectable, isTransformable, isVisible, removeFigureListener, requestRemove, restoreAttributesTo, restoreTransformTo, setAttribute, setBounds, willChange

Constructor Detail

LineConnectionFigure

public LineConnectionFigure()

Creates a new instance.

Method Detail

transform

public void transform(java.awt.geom.AffineTransform tx)

Ensures that a connection is updated if the connection was moved.

Specified by:

transform in interface Figure

Overrides:

transform in class BezierFigure

Parameters:

tx - The transformation.

See Also:

Figure.getTransformRestoreData(), Figure.restoreTransformTo(java.lang.Object)

createHandles

public java.util.Collection<Handle> createHandles(int detailLevel)

Gets the handles of the figure. It returns the normal PolylineHandles but adds ChangeConnectionHandles at the start and end.

Specified by:

createHandles in interface Figure

Overrides:

createHandles in class LineFigure

Parameters:

detailLevel - The detail level of the handles. Usually this is 0 for bounding box handles and 1 for point handles.

Returns:

a Collection of handles

See Also:

Handle

canConnect

public boolean canConnect()

Tests whether a figure can be a connection target. ConnectionFigures cannot be connected and return false.

Specified by:

canConnect in interface Figure

Overrides:

canConnect in class LineFigure

updateConnection

public void updateConnection()

Description copied from interface: ConnectionFigure

Updates the start and end point of the figure and fires figureChanged events.

Specified by:

updateConnection in interface ConnectionFigure

validate

public void validate()

Overrides:

validate in class BezierFigure

canConnect

public boolean canConnect(Connector start,
                          Connector end)

Description copied from interface: ConnectionFigure

Returns true, if this ConnectionFigure can connect the specified Connectors. Implement this method to constrain the allowed connections between figures.

Specified by:

canConnect in interface ConnectionFigure

getEndConnector

public Connector getEndConnector()

Description copied from interface: ConnectionFigure

Gets the end Connector. Returns null, if there is no end connection.

Specified by:

getEndConnector in interface ConnectionFigure

getEndFigure

public Figure getEndFigure()

Description copied from interface: ConnectionFigure

Gets the end figure of the connection. This is a convenience method for doing getEndConnector().getOwner() and handling null cases.

Specified by:

getEndFigure in interface ConnectionFigure

getStartConnector

public Connector getStartConnector()

Description copied from interface: ConnectionFigure

Gets the start Connector. Returns null, if there is no start connection.

Specified by:

getStartConnector in interface ConnectionFigure

getStartFigure

public Figure getStartFigure()

Description copied from interface: ConnectionFigure

Gets the start figure of the connection. This is a convenience method for doing getStartConnector().getOwner() and handling null cases.

Specified by:

getStartFigure in interface ConnectionFigure

setEndConnector

public void setEndConnector(Connector newEnd)

Description copied from interface: ConnectionFigure

Sets the end Connector of the connection. Set this to null to disconnect the end connection.

Specified by:

setEndConnector in interface ConnectionFigure

Parameters:

newEnd - the end Connector of the connection

setStartConnector

public void setStartConnector(Connector newStart)

Description copied from interface: ConnectionFigure

Sets the start Connector of the connection. Set this to null to disconnect the start connection.

Specified by:

setStartConnector in interface ConnectionFigure

Parameters:

newStart - the start Connector of the connection

addNotify

public void addNotify(Drawing drawing)

This method is invoked, when the Figure is being removed from a Drawing. This method invokes handleConnect, if the Figure is connected.

Specified by:

addNotify in interface Figure

Overrides:

addNotify in class AbstractFigure

See Also:

handleConnect(org.jhotdraw.draw.Connector, org.jhotdraw.draw.Connector)

removeNotify

public void removeNotify(Drawing drawing)

This method is invoked, when the Figure is being removed from a Drawing. This method invokes handleDisconnect, if the Figure is connected.

Specified by:

removeNotify in interface Figure

Overrides:

removeNotify in class AbstractFigure

See Also:

handleDisconnect(org.jhotdraw.draw.Connector, org.jhotdraw.draw.Connector)

handleDisconnect

protected void handleDisconnect(Connector start,
                                Connector end)

Handles the disconnection of a connection. Override this method to handle this event.

Note: This method is only invoked, when the Figure is part of a Drawing. If the Figure is removed from a Drawing, this method is invoked on behalf of the removeNotify call to the Figure.

See Also:

removeNotify(org.jhotdraw.draw.Drawing)

handleConnect

protected void handleConnect(Connector start,
                             Connector end)

Handles the connection of a connection. Override this method to handle this event.

Note: This method is only invoked, when the Figure is part of a Drawing. If the Figure is added to a Drawing this method is invoked on behalf of the addNotify call to the Figure.

clone

public LineConnectionFigure clone()

Description copied from interface: Figure

Returns a clone of the figure, with clones of all aggregated figures, such as chilrend and decorators. The cloned figure does not clone the list of FigureListeners from its original.

Specified by:

clone in interface Figure

Overrides:

clone in class BezierFigure

remap

public void remap(java.util.Map oldToNew)

Description copied from interface: Figure

After cloning a collection of figures, the ConnectionFigures contained in this collection still connect to the original figures instead of to the clones. Using This operation and providing a map, which maps from the original collection of figures to the new collection, connections can be remapped to the new figures.

Specified by:

remap in interface Figure

Overrides:

remap in class AbstractFigure

canConnect

public boolean canConnect(Connector start)

Description copied from interface: ConnectionFigure

Checks if this ConnectionFigure can be connect to the specified Connector. This is used to provide an early feedback to the user, when he/she creates a new connection.

Specified by:

canConnect in interface ConnectionFigure

handleMouseClick

public boolean handleMouseClick(java.awt.geom.Point2D.Double p,
                                java.awt.event.MouseEvent evt,
                                DrawingView view)

Handles a mouse click.

Specified by:

handleMouseClick in interface Figure

Overrides:

handleMouseClick in class LineFigure

Parameters:

p - The location of the mouse event.

evt - The mouse event.

view - The drawing view which is the source of the mouse event.

Returns:

Returns true, if the event was consumed.

readPoints

protected void readPoints(DOMInput in)
                   throws java.io.IOException

Overrides:

readPoints in class BezierFigure

Throws:

java.io.IOException

read

public void read(DOMInput in)
          throws java.io.IOException

Specified by:

read in interface DOMStorable

Overrides:

read in class BezierFigure

Throws:

java.io.IOException

readLiner

protected void readLiner(DOMInput in)
                  throws java.io.IOException

Throws:

java.io.IOException

write

public void write(DOMOutput out)
           throws java.io.IOException

Specified by:

write in interface DOMStorable

Overrides:

write in class BezierFigure

Throws:

java.io.IOException

writeLiner

protected void writeLiner(DOMOutput out)
                   throws java.io.IOException

Throws:

java.io.IOException

writePoints

protected void writePoints(DOMOutput out)
                    throws java.io.IOException

Overrides:

writePoints in class BezierFigure

Throws:

java.io.IOException

setLiner

public void setLiner(Liner newValue)

Description copied from interface: ConnectionFigure

Set a Liner object which encapsulated a lineout algorithm for this figure. Typically, a Liner accesses the child components of this figure and arranges their graphical presentation.

Specified by:

setLiner in interface ConnectionFigure

Parameters:

newValue - encapsulation of a lineout algorithm.

setNode

public void setNode(int index,
                    BezierPath.Node p)

Description copied from class: BezierFigure

Sets a control point.

Specified by:

setNode in interface ConnectionFigure

Overrides:

setNode in class BezierFigure

lineout

public void lineout()

Description copied from interface: ConnectionFigure

A lineout algorithm is used to define how the child components should be laid out in relation to each other. The task for lineouting the child components for presentation is delegated to a Liner which can be plugged in at runtime.

Specified by:

lineout in interface ConnectionFigure

getBezierPath

public BezierPath getBezierPath()

FIXME - Liner must work with API of LineConnection!

Overrides:

getBezierPath in class BezierFigure

getLiner

public Liner getLiner()

Description copied from interface: ConnectionFigure

Get a Liner object which encapsulated a lineout algorithm for this figure. Typically, a Liner accesses the child components of this figure and arranges their graphical presentation.

Specified by:

getLiner in interface ConnectionFigure

Returns:

lineout strategy used by this figure

setStartPoint

public void setStartPoint(java.awt.geom.Point2D.Double p)

Description copied from class: BezierFigure

Convenience method for setting the point coordinate of the start point. If the BezierFigure has not at least two nodes, nodes are added to the figure until the BezierFigure has at least two nodes.

Specified by:

setStartPoint in interface ConnectionFigure

Overrides:

setStartPoint in class BezierFigure

setPoint

public void setPoint(int index,
                     java.awt.geom.Point2D.Double p)

Description copied from class: BezierFigure

Sets the point coordinate of control point 0 at the specified node.

Specified by:

setPoint in interface ConnectionFigure

Overrides:

setPoint in class BezierFigure

setEndPoint

public void setEndPoint(java.awt.geom.Point2D.Double p)

Description copied from class: BezierFigure

Convenience method for setting the point coordinate of the end point. If the BezierFigure has not at least two nodes, nodes are added to the figure until the BezierFigure has at least two nodes.

Specified by:

setEndPoint in interface ConnectionFigure

Overrides:

setEndPoint in class BezierFigure

reverseConnection

public void reverseConnection()