org.jgraph.graph
Class EdgeView

java.lang.Object
  org.jgraph.graph.AbstractCellView
      org.jgraph.graph.EdgeView

All Implemented Interfaces:

Serializable, CellView

public class EdgeView
extends AbstractCellView

The default implementation of an edge view.

Version:

1.0 1/1/02

Author:

Gaudenz Alder

See Also:

Serialized Form

Nested Class Summary

class

EdgeView.EdgeHandle

Field Summary

Shape	beginShape Drawing attributes that are created on the fly
Shape	endShape Drawing attributes that are created on the fly
protected Point	labelPosition Cached label position of the edge.
Shape	lineShape Drawing attributes that are created on the fly
protected List	points List of points of the edge.
static EdgeRenderer	renderer Renderer for the class.
static long	shapeHits
GeneralPath	sharedPath Shared-path tune-up.
protected CellView	source Cached source and target portview of the edge.
protected CellView	target Cached source and target portview of the edge.

Fields inherited from class org.jgraph.graph.AbstractCellView

allAttributes, attributes, cell, cellEditor, childViews, graph, mapper, parent

Constructor Summary

EdgeView(Object cell, JGraph graph, CellMapper mapper)
Constructs an edge view for the specified model object.

Method Summary

void	addPoint(int index, Point p) Adds p at position index.
Rectangle	getBounds() Returns the location for this portview.
EdgeRenderer	getEdgeRenderer() Returns the local renderer.
CellHandle	getHandle(GraphContext context) Returns a cell handle for the view.
Rectangle	getLabelBounds() Returns the bounds of label according to the last rendering state
Point	getLabelPosition() Returns a point that describes the position of the label.
static double	getLength(CellView view)
Point	getPoint(int index) Returns the cached points for this edge.
int	getPointCount() Returns the number of point for this edge.
List	getPoints() Returns the points.
CellViewRenderer	getRenderer() Returns a renderer for the class.
Shape	getShape() Returns the shape of the view according to the last rendering state
CellView	getSource() Returns the CellView that represents the source of the edge.
CellView	getTarget() Returns the CellView that represents the target of the edge.
boolean	intersects(Graphics g, Rectangle rect) Returns true if this view intersects the given rectangle.
boolean	isAddPointEvent(MouseEvent event) Returning true signifies a mouse event adds a new point to an edge.
boolean	isConstrainedMoveEvent(MouseEvent e)
boolean	isRemovePointEvent(MouseEvent event) Returning true signifies a mouse event removes a given point.
void	refresh(boolean createDependentViews) Overrides the parent method to udpate the cached points, source and target port.
void	removePoint(int index) Removes the point at position index.
void	setLabelPosition(Point pos) Sets the description of the label position.
void	setPoint(int index, Point p) Sets the point at index to p.
void	setSource(CellView sourceView) Sets the sourceView of the edge.
void	setTarget(CellView targetView) Sets the targetView of the edge.
void	update() Update attributes and recurse children.

Methods inherited from class org.jgraph.graph.AbstractCellView

childUpdated, getAllAttributes, getAttributes, getBounds, getCell, getChildViews, getDescendantViews, getEditor, getGraph, getMapper, getModel, getParentView, getRendererComponent, isLeaf, removeFromParent, scale, setAttributes, setBounds, translate, updateAllAttributes

Methods inherited from class java.lang.Object

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

Field Detail

renderer

public static EdgeRenderer renderer

Renderer for the class.

points

protected List points

List of points of the edge. May contain ports.

source

protected CellView source

Cached source and target portview of the edge.

target

protected CellView target

Cached source and target portview of the edge.

labelPosition

protected Point labelPosition

Cached label position of the edge.

beginShape

public Shape beginShape

Drawing attributes that are created on the fly

endShape

public Shape endShape

Drawing attributes that are created on the fly

lineShape

public Shape lineShape

Drawing attributes that are created on the fly

sharedPath

public transient GeneralPath sharedPath

Shared-path tune-up.

shapeHits

public static long shapeHits

Constructor Detail

EdgeView

public EdgeView(Object cell,
                JGraph graph,
                CellMapper mapper)

Constructs an edge view for the specified model object.

Parameters:

cell - reference to the model object

Method Detail

refresh

public void refresh(boolean createDependentViews)

Overrides the parent method to udpate the cached points, source and target port. If the source or target is removed, a point is inserted into the array of points.

Specified by:

refresh in interface CellView

Overrides:

refresh in class AbstractCellView

update

public void update()

Update attributes and recurse children.

Specified by:

update in interface CellView

Overrides:

update in class AbstractCellView

getShape

public final Shape getShape()

Returns the shape of the view according to the last rendering state

getLabelBounds

public final Rectangle getLabelBounds()

Returns the bounds of label according to the last rendering state

intersects

public boolean intersects(Graphics g,
                          Rectangle rect)

Returns true if this view intersects the given rectangle.

Specified by:

intersects in interface CellView

Overrides:

intersects in class AbstractCellView

getBounds

public Rectangle getBounds()

Returns the location for this portview.

Specified by:

getBounds in interface CellView

Specified by:

getBounds in class AbstractCellView

getEdgeRenderer

public EdgeRenderer getEdgeRenderer()

Returns the local renderer. Do not access the renderer field directly. Use this method instead!

getRenderer

public CellViewRenderer getRenderer()

Returns a renderer for the class.

Specified by:

getRenderer in class AbstractCellView

getHandle

public CellHandle getHandle(GraphContext context)

Returns a cell handle for the view.

Specified by:

getHandle in interface CellView

Specified by:

getHandle in class AbstractCellView

getSource

public CellView getSource()

Returns the CellView that represents the source of the edge.

setSource

public void setSource(CellView sourceView)

Sets the sourceView of the edge.

getTarget

public CellView getTarget()

Returns the CellView that represents the target of the edge.

setTarget

public void setTarget(CellView targetView)

Sets the targetView of the edge.

getLabelPosition

public Point getLabelPosition()

Returns a point that describes the position of the label.

setLabelPosition

public void setLabelPosition(Point pos)

Sets the description of the label position.

getPoints

public List getPoints()

Returns the points.

Returns:

java.util.List

getPointCount

public int getPointCount()

Returns the number of point for this edge.

getPoint

public Point getPoint(int index)

Returns the cached points for this edge.

setPoint

public void setPoint(int index,
                     Point p)

Sets the point at index to p.

addPoint

public void addPoint(int index,
                     Point p)

Adds p at position index.

removePoint

public void removePoint(int index)

Removes the point at position index.

isAddPointEvent

public boolean isAddPointEvent(MouseEvent event)

Returning true signifies a mouse event adds a new point to an edge.

isRemovePointEvent

public boolean isRemovePointEvent(MouseEvent event)

Returning true signifies a mouse event removes a given point.

getLength

public static double getLength(CellView view)

isConstrainedMoveEvent

public boolean isConstrainedMoveEvent(MouseEvent e)