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A modified version of some JGraph files
The newest version!
/*
* @(#)EdgeView.java 1.0 03-JUL-04
*
* Copyright (c) 2001-2004 Gaudenz Alder
*
*/
package org.jgraph.graph;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.event.MouseEvent;
import java.awt.geom.AffineTransform;
import java.awt.geom.GeneralPath;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.BevelBorder;
import org.jgraph.JGraph;
import org.jgraph.plaf.GraphUI;
import org.jgraph.plaf.basic.BasicGraphUI;
/**
* The default implementation of an edge view. The getEdgeRenderer method
* assumes a renderer of type EdgeRenderer. If you provide a custom renderer to
* a subclass, you must also override the methods that call this method, namely:
* getShape, getLabelBounds, getExtraLabelBounds, intersects and getBounds.
*
* @version 1.0 1/1/02
* @author Gaudenz Alder
*/
public class EdgeView extends AbstractCellView {
/** Renderer for the class. */
public static transient EdgeRenderer renderer = new EdgeRenderer();
/** List of points of the edge. May contain ports. */
protected List points=new ArrayList(0);
/** Cached source and target portview of the edge. */
protected CellView source, target;
protected CellView sourceParentView, targetParentView;
/** Cached label position of the edge. */
protected Point2D labelPosition;
protected Point2D[] extraLabelPositions;
protected transient Point2D labelVector = null;
/** Drawing attributes that are created on the fly */
public transient Shape beginShape, endShape, lineShape;
/** Shared-path tune-up. */
public transient GeneralPath sharedPath = null;
protected transient Rectangle2D cachedBounds = null;
/** Whether or not pre 5.12.3.3 disconnectable behaviour is to be used.
* This allowed an edge to reconnect to another vertex ever when
* isDisconnectable was false for the edge. Set to false
* with isDisconnectable set to false for the edge forbids
* any disconnection. Default is true. */
public static boolean LEGACY_DISCONNECTABLE = true;
/**
* Constructs an empty edge view.
*/
public EdgeView() {
super();
initialiseDefaultPoints();
}
public void initialiseDefaultPoints(){
List controlPoints = GraphConstants.getPoints(allAttributes);
if (controlPoints == null) {
controlPoints = new ArrayList(4);
controlPoints.add(allAttributes.createPoint(10, 10));
controlPoints.add(allAttributes.createPoint(20, 20));
GraphConstants.setPoints(allAttributes, controlPoints);
}
points=controlPoints;
}
/**
* Constructs an edge view for the specified model object.
*
* @param cell
* reference to the model object
*/
public EdgeView(Object cell) {
super(cell);
}
//
// Data Source
//
/**
* 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.
*/
public void refresh(GraphLayoutCache cache, CellMapper mapper,
boolean createDependentViews) {
// Makes sure the manual control points are passed to
// the router instead of the cached control points after
// changes to the edge (normally manual point changes).
initialiseDefaultPoints();
super.refresh(cache, mapper, createDependentViews);
// Re-sync source- and targetportviews
GraphModel model = cache.getModel();
Object modelSource = model.getSource(cell);
Object modelTarget = model.getTarget(cell);
setSource(mapper.getMapping(modelSource, createDependentViews));
setTarget(mapper.getMapping(modelTarget, createDependentViews));
if (modelSource != null && getSource() == null)
sourceParentView = getVisibleParent(model, mapper, modelSource);
else
sourceParentView = null;
if (modelTarget != null && getTarget() == null)
targetParentView = getVisibleParent(model, mapper, modelTarget);
else
targetParentView = null;
}
protected CellView getVisibleParent(GraphModel model, CellMapper mapper,
Object port) {
CellView view = null;
do {
view = mapper.getMapping(port, false);
port = model.getParent(port);
} while (view == null && port != null);
return view;
}
/**
* Update attributes and recurse children.
*/
public void update(GraphLayoutCache cache) {
super.update(cache);
// Save the reference to the points so they can be changed
// in-place by use of setPoint, setSource, setTarget methods.
List controlPoints = GraphConstants.getPoints(allAttributes);
if (controlPoints == null) {
controlPoints = new ArrayList(4);
controlPoints.add(allAttributes.createPoint(10, 10));
controlPoints.add(allAttributes.createPoint(20, 20));
GraphConstants.setPoints(allAttributes, controlPoints);
}
// Uses the manual control points while the edge is being routed.
// Otherwise uses the cached points (eg. for preview).
if (points == null)
points = controlPoints;
Edge.Routing routing = GraphConstants.getRouting(allAttributes);
List routedPoints = null;
// Passes the current cached points to the router
if (routing != null)
routedPoints = routing.route(cache, this);
// Shadows the manual control points with the
// routed control points
points = (routedPoints != null && !routedPoints.isEmpty()) ? routedPoints
: controlPoints;
// Overrides manual point locations with the real port views
if (points == controlPoints) {
if (source != null)
setSource(source);
if (target != null)
setTarget(target);
}
// Checks and caches label positions
checkDefaultLabelPosition();
Point2D[] positions = GraphConstants
.getExtraLabelPositions(allAttributes);
if (positions != null) {
extraLabelPositions = new Point2D[positions.length];
for (int i = 0; i < positions.length; i++)
extraLabelPositions[i] = positions[i];
} else
extraLabelPositions = null;
// Clear cached shapes
beginShape = null;
endShape = null;
lineShape = null;
invalidate();
}
/**
* Hook for subclassers to avoid default label positions.
*/
protected void checkDefaultLabelPosition() {
labelPosition = GraphConstants.getLabelPosition(allAttributes);
String label = String.valueOf(getCell());
if (labelPosition == null && label != null && label.length() > 0) {
int center = GraphConstants.PERMILLE / 2;
labelPosition = new Point(center, 0);
GraphConstants.setLabelPosition(allAttributes, labelPosition);
}
}
/**
* Resets the cached values of the edge view
*/
protected void invalidate() {
labelVector = null;
sharedPath = null;
cachedBounds = null;
}
/**
* Returns the shape of the view according to the last rendering state
*/
public Shape getShape() {
if (sharedPath != null)
return sharedPath;
else {
return sharedPath = (GeneralPath) getEdgeRenderer().createShape();
}
}
//
// View Methods
//
/**
* Returns true if this view intersects the given rectangle.
*/
public boolean intersects(JGraph graph, Rectangle2D rect) {
boolean intersects = super.intersects(graph, rect);
if (!isLeaf()) {
return intersects;
} else if (intersects) {
Rectangle r = new Rectangle((int) rect.getX(), (int) rect.getY(),
(int) rect.getWidth(), (int) rect.getHeight());
return getEdgeRenderer().intersects(graph, this, r);
}
return false;
}
/**
* Returns the location for this edgeview.
*/
public Rectangle2D getBounds() {
Rectangle2D rect = super.getBounds();
if (rect == null) {
if (cachedBounds == null) {
cachedBounds = getEdgeRenderer().getBounds(this);
}
rect = cachedBounds;
}
return rect;
}
/**
* Returns the local renderer. Do not access the renderer field directly.
* Use this method instead. Note: This method is package private.
*/
EdgeRenderer getEdgeRenderer() {
return (EdgeRenderer) getRenderer();
}
/**
* Returns a renderer for the class.
*/
public CellViewRenderer getRenderer() {
return renderer;
}
/**
* Returns a cell handle for the view.
*/
public CellHandle getHandle(GraphContext context) {
return new EdgeHandle(this, context);
}
//
// Cached Values
//
/**
* Returns the CellView that represents the source of the edge.
*/
public CellView getSource() {
return source;
}
public CellView getSourceParentView() {
return sourceParentView;
}
/**
* Sets the sourceView of the edge.
*/
public void setSource(CellView sourceView) {
sourceParentView = null;
source = sourceView;
if (source != null)
points.set(0, source);
else
points.set(0, getPoint(0));
invalidate();
}
/**
* Returns the CellView that represents the target of the edge.
*/
public CellView getTarget() {
return target;
}
public CellView getTargetParentView() {
return targetParentView;
}
/**
* Sets the targetView of the edge.
*/
public void setTarget(CellView targetView) {
target = targetView;
targetParentView = null;
int n = points.size() - 1;
if (target != null)
points.set(n, target);
else
points.set(n, getPoint(n));
invalidate();
}
/**
* Returns a point that describes the position of the label.
*/
public Point2D getExtraLabelPosition(int index) {
return extraLabelPositions[index];
}
/**
* Returns a point that describes the position of the label.
*/
public Point2D getLabelPosition() {
return labelPosition;
}
/**
* Sets the description of the label position.
*/
public void setLabelPosition(Point2D pos) {
labelPosition.setLocation(pos);
invalidate();
}
/**
* Sets the description of the label position.
*/
public void setExtraLabelPosition(int index, Point2D pos) {
extraLabelPositions[index].setLocation(pos);
invalidate();
}
//
// Points
//
/**
* Returns true if the edge is a loop.
*/
public boolean isLoop() {
return (getSource() != null && getSource() == getTarget())
|| (sourceParentView != null && sourceParentView == targetParentView)
|| (sourceParentView != null && getTarget() != null && getTarget()
.getParentView() == sourceParentView)
|| (targetParentView != null && getSource() != null && getSource()
.getParentView() == targetParentView);
}
/**
* Returns the points.
*
* @return List
*/
public List getPoints() {
return points;
}
/**
* Returns the number of point for this edge.
*/
public int getPointCount() {
if (points != null) {
return points.size();
} else {
return 0;
}
}
/**
* Returns the cached points for this edge.
*/
public Point2D getPoint(int index) {
Object obj = points.get(index);
if (index == 0 && sourceParentView != null) {
return sourceParentView.getPerimeterPoint(this,
getCenterPoint(sourceParentView),
getNearestPoint(index == 0));
} else if (index == getPointCount() - 1 && targetParentView != null) {
return targetParentView.getPerimeterPoint(this,
getCenterPoint(targetParentView),
getNearestPoint(index == 0));
} else if (obj instanceof PortView)
// Port Location Seen From This Edge
return ((PortView) obj).getLocation(this,
getNearestPoint(index == 0));
else if (obj instanceof CellView) {
// Should not happen
Rectangle2D r = ((CellView) obj).getBounds();
return new Point2D.Double(r.getX(), r.getY());
} else if (obj instanceof Point2D)
// Regular Point
return (Point2D) obj;
return null;
}
/**
* Returns the nearest point wrt to the source or target. This method
* returns the next or previous point or port in the points list, eg. if
* source is true it returns the location of the point or port at index 1
* without calling the getLocation method on any ports.
* Likewise, the method returns the location at index getPointCount()-2 if
* source is false.
*/
protected Point2D getNearestPoint(boolean source) {
if (getPointCount() == 2) {
if (source
&& target instanceof PortView
&& GraphConstants.getOffset(target.getAllAttributes()) != null) {
return ((PortView) target).getLocation(this);
}
if (!source
&& this.source instanceof PortView
&& GraphConstants.getOffset(this.source.getAllAttributes()) != null) {
return ((PortView) this.source).getLocation(this);
}
if (source && targetParentView != null && targetParentView.isLeaf())
return getCenterPoint(targetParentView);
else if (!source && sourceParentView != null
&& sourceParentView.isLeaf())
return getCenterPoint(sourceParentView);
}
return getPointLocation((source) ? 1 : getPointCount() - 2);
}
/**
* Returns the point of edge at index. Avoids
* calling getLocation on any ports of edge.
*
* This is used from within getPoint to pass the nearest point to the
* portview to find it's location. This uses the center point of the parent
* view to determine the port view's location to avoid infinite recursion.
*/
protected Point2D getPointLocation(int index) {
Object obj = points.get(index);
if (obj instanceof Point2D)
return (Point2D) obj;
else if (obj instanceof PortView) {
CellView vertex = ((CellView) obj).getParentView();
if (vertex != null)
return getCenterPoint(vertex);
}
return null;
}
/**
* Sets the point at index to p.
*/
public void setPoint(int index, Point2D p) {
points.set(index, p);
invalidate();
}
/**
* Adds p at position index.
*/
public void addPoint(int index, Point2D p) {
points.add(index, p);
invalidate();
}
/**
* Removes the point at position index.
*/
public void removePoint(int index) {
points.remove(index);
invalidate();
}
/**
* Adds an extra label.
*/
public void addExtraLabel(Point2D location, Object label) {
Object[] extraLabels = GraphConstants
.getExtraLabels(getAllAttributes());
Point2D[] positions = GraphConstants
.getExtraLabelPositions(getAllAttributes());
// Inserts a new extra label
if (extraLabels == null) {
extraLabels = new Object[1];
positions = new Point2D[1];
} else {
Object[] tmp = new Object[extraLabels.length + 1];
System.arraycopy(extraLabels, 0, tmp, 0, extraLabels.length);
extraLabels = tmp;
Point2D[] pts = new Point2D[positions.length + 1];
System.arraycopy(positions, 0, pts, 0, positions.length);
positions = pts;
}
int newIndex = extraLabels.length - 1;
extraLabels[newIndex] = label;
positions[newIndex] = location;
GraphConstants.setExtraLabels(getAllAttributes(), extraLabels);
GraphConstants.setExtraLabelPositions(getAllAttributes(), positions);
}
/**
* Removes the point at position index.
*/
public void removeExtraLabel(int index) {
Object[] labels = GraphConstants.getExtraLabels(getAllAttributes());
Point2D[] pts = GraphConstants
.getExtraLabelPositions(getAllAttributes());
if (labels == null || labels.length > 1) {
Object[] newLabels = new Object[labels.length - 1];
Point2D[] newPts = new Point2D[pts.length - 1];
System.arraycopy(labels, 0, newLabels, 0, index);
if (index < newLabels.length)
System.arraycopy(labels, index + 1, newLabels, index,
newLabels.length - index);
System.arraycopy(pts, 0, newPts, 0, index);
if (index < newPts.length)
System.arraycopy(pts, index + 1, newPts, index, newPts.length
- index);
GraphConstants.setExtraLabels(getAllAttributes(), newLabels);
GraphConstants.setExtraLabelPositions(getAllAttributes(), newPts);
} else {
// TODO: Remove via REMOVEATTRIBUTES
GraphConstants.setExtraLabels(getAllAttributes(), new Object[0]);
GraphConstants.setExtraLabelPositions(getAllAttributes(),
new Point2D[0]);
}
}
/**
* Utility method that returns the first point of the pair that forms the
* segment that is relativeX along the edge as a proportion
*
* @return the index of the first point. A value of -1 indicate to use the
* first and last points
*/
public int getFirstPointOfSegment() {
boolean exactSegment = GraphConstants
.isExactSegmentLabel(allAttributes);
double dx = 0;
double dy = 0;
int n = getPointCount();
if (exactSegment) {
// Determine the vector based on the actual edge segment the
// label lies on
Point2D lastPoint = getPoint(0);
double totalLength = 0;
for (int i = 1; i < n; i++) {
Point2D currentPoint = getPoint(i);
dx = currentPoint.getX() - lastPoint.getX();
dy = currentPoint.getY() - lastPoint.getY();
totalLength += Math.sqrt(dx * dx + dy * dy);
lastPoint = currentPoint;
}
double relativeX = getLabelPosition().getX()/(double)GraphConstants.PERMILLE;
double labelXPositionDistance = relativeX * totalLength;
totalLength = 0;
lastPoint = getPoint(0);
if (relativeX <= 0.0 || relativeX >= 1.0) {
return -1;
} else {
for (int i = 1; i < n; i++) {
Point2D currentPoint = getPoint(i);
dx = currentPoint.getX() - lastPoint.getX();
dy = currentPoint.getY() - lastPoint.getY();
totalLength += Math.sqrt(dx * dx + dy * dy);
if (totalLength > labelXPositionDistance) {
return i-1;
}
}
}
}
else {
return -1;
}
return -1;
}
/**
* Hook to return the vector that is taken as the base vector to compute
* relative label positions. Normally, the vector goes from the first to the
* last point on the edge, unless these points are equal, in which case the
* average distance of all points to the source point is used.
*/
public Point2D getLabelVector() {
if (labelVector == null) {
Point2D p0 = getPoint(0);
double dx = 0;
double dy = 0;
// Finds an average distance
int n = getPointCount();
if (isLoop()) {
for (int i = 1; i < n; i++) {
Point2D point = getPoint(i);
dx += point.getX() - p0.getX();
dy += point.getY() - p0.getY();
}
n /= 2;
dx /= n;
dy /= n;
labelVector = new Point2D.Double(dx, dy);
} else {
boolean exactSegment = GraphConstants
.isExactSegmentLabel(allAttributes);
if (exactSegment) {
// Determine the vector based on the actual edge segment the
// label lies on
Point2D lastPoint = getPoint(0);
double totalLength = 0;
for (int i = 1; i < n; i++) {
Point2D currentPoint = getPoint(i);
dx = currentPoint.getX() - lastPoint.getX();
dy = currentPoint.getY() - lastPoint.getY();
totalLength += Math.sqrt(dx * dx + dy * dy);
lastPoint = currentPoint;
}
double relativeX = getLabelPosition().getX()/(double)GraphConstants.PERMILLE;
double labelXPositionDistance = relativeX * totalLength;
totalLength = 0;
lastPoint = getPoint(0);
if (relativeX <= 0.0 || relativeX >= 1.0) {
exactSegment = false;
} else {
for (int i = 1; i < n; i++) {
Point2D currentPoint = getPoint(i);
dx = currentPoint.getX() - lastPoint.getX();
dy = currentPoint.getY() - lastPoint.getY();
totalLength += Math.sqrt(dx * dx + dy * dy);
if (totalLength > labelXPositionDistance) {
labelVector = new Point2D.Double(dx, dy);
break;
}
lastPoint = currentPoint;
}
}
}
if (!exactSegment || labelVector == null) {
Point2D point = getPoint(n - 1);
dx = point.getX() - p0.getX();
dy = point.getY() - p0.getY();
labelVector = new Point2D.Double(dx, dy);
}
}
}
return labelVector;
}
/**
* Returns the absolute position of the main label
* @return the absolute position of the main label
*/
protected Point2D getAbsoluteLabelPosition() {
Point2D result = getAbsoluteLabelPositionFromRelative(GraphConstants.getLabelPosition(getAllAttributes()));
return result;
}
/**
* Returns the absolute position of the specified extra label
* @param index the index of the extra label
* @return the absolute position of the specified extra label
*/
protected Point2D getAbsoluteExtraLabelPosition(int index) {
Point2D[] positions = GraphConstants
.getExtraLabelPositions(getAllAttributes());
if (positions != null && positions.length > index) {
Point2D result = getAbsoluteLabelPositionFromRelative(positions[index]);
return result;
}
return null;
}
/**
* Converts relative label position to absolute and allows for
* any label offset.
* @param geometry the relative label position
* @return the absolute label position including any offset
*/
protected Point2D getAbsoluteLabelPositionFromRelative(Point2D geometry) {
Point2D result = convertRelativeLabelPositionToAbsolute(geometry);
if (result != null)
{
double offsetX = 0;
double offsetY = 0;
Point2D offset = GraphConstants.getOffset(getAllAttributes());
if (offset != null) {
offsetX = offset.getX();
offsetY = offset.getY();
}
double x = result.getX() + offsetX;
double y = result.getY() + offsetY;
return new Point2D.Double(x, y);
}
return null;
}
/**
* Converts an relative label position (x is distance along edge and y is
* distance above/below edge vector) into an absolute co-ordination point
* @param geometry the relative label position
* @return the absolute label position
*/
protected Point2D convertRelativeLabelPositionToAbsolute(Point2D geometry) {
Point2D pt = getPoint(0);
if (pt != null)
{
double length = 0;
int pointCount = getPointCount();
double[] segments = new double[pointCount];
// Find the total length of the segments and also store the length
// of each segment
for (int i = 1; i < pointCount; i++)
{
Point2D tmp = getPoint(i);
if (tmp != null)
{
double dx = pt.getX() - tmp.getX();
double dy = pt.getY() - tmp.getY();
double segment = Math.sqrt(dx * dx + dy * dy);
segments[i - 1] = segment;
length += segment;
pt = tmp;
}
}
// Change x to be a value between 0 and 1 indicating how far
// along the edge the label is
double x = geometry.getX()/GraphConstants.PERMILLE;
double y = geometry.getY();
// dist is the distance along the edge the label is
double dist = x * length;
length = 0;
int index = 1;
double segment = segments[0];
// Find the length up to the start of the segment the label is
// on (length) and retrieve the length of that segment (segment)
while (dist > length + segment && index < pointCount - 1)
{
length += segment;
segment = segments[index++];
}
// factor is the proportion along this segment the label lies at
double factor = (dist - length) / segment;
Point2D p0 = getPoint(index - 1);
Point2D pe = getPoint(index);
if (p0 != null && pe != null)
{
// The x and y offsets of the label from the start point
// of the segment
double dx = pe.getX() - p0.getX();
double dy = pe.getY() - p0.getY();
// The normal vectors of
double nx = dy / segment;
double ny = dx / segment;
// The x position is the start x of the segment + the factor of
// the x offset between the start and end of the segment + the
// x component of the y (height) offset contributed along the
// normal vector.
x = p0.getX() + dx * factor - nx * y;
// The x position is the start y of the segment + the factor of
// the y offset between the start and end of the segment + the
// y component of the y (height) offset contributed along the
// normal vector.
y = p0.getY() + dy * factor + ny * y;
return new Point2D.Double(x, y);
}
}
return null;
}
//
// Routing
//
public static double getLength(CellView view) {
double cost = 1;
if (view instanceof EdgeView) {
EdgeView edge = (EdgeView) view;
Point2D last = null, current = null;
for (int i = 0; i < edge.getPointCount(); i++) {
current = edge.getPoint(i);
if (last != null)
cost += last.distance(current);
last = current;
}
}
return cost;
}
//
// Handle
//
// This implementation uses the point instance to make the change. No index
// is used for the current point because routing could change the index
// during
// the move operation.
public static class EdgeHandle implements CellHandle, Serializable {
protected JGraph graph;
/* Pointer to the edge and its clone. */
protected EdgeView edge, orig;
/*
* Boolean indicating whether the source, target or label is being
* edited.
*/
protected boolean label = false, source = false, target = false;
/**
* Holds the index of the current (editing) label or point.
*/
protected int currentLabel = -1, currentIndex = -1;
/* Pointer to the currently selected point. */
protected Point2D currentPoint;
/* Array of control points represented as rectangles. */
protected transient Rectangle2D[] r;
/* A control point for the label position. */
protected transient Rectangle2D loc;
protected transient Rectangle2D[] extraLabelLocations;
protected boolean firstOverlayCall = true;
protected boolean isEdgeConnectable = true;
protected EdgeView relevantEdge = null;
/**
* True if the cell is being edited.
*/
protected boolean editing = false;
/**
* Holds the initial location of the label.
*/
protected Point2D initialLabelLocation = null;
/**
* Indicates whether the edge has been modified during the last mouse
* pressed and dragged operations.
*/
protected boolean edgeModified = false;
/**
* Component that is used for highlighting cells if
* the graph does not allow XOR painting.
*/
protected JComponent highlight = new JPanel();
public EdgeHandle(EdgeView edge, GraphContext ctx) {
this.graph = ctx.getGraph();
this.edge = edge;
editing = graph.getEditingCell() == edge.getCell();
loc = new Rectangle();
Object[] labels = GraphConstants.getExtraLabels(edge
.getAllAttributes());
if (labels != null) {
extraLabelLocations = new Rectangle[labels.length];
for (int i = 0; i < extraLabelLocations.length; i++)
extraLabelLocations[i] = new Rectangle();
}
orig = (EdgeView) graph.getGraphLayoutCache().getMapping(
edge.getCell(), false);
reloadPoints(orig);
isEdgeConnectable = GraphConstants.isConnectable(edge
.getAllAttributes());
// Configures the panel for highlighting ports
highlight = createHighlight();
}
/**
* Creates the component that is used for highlighting cells if
* the graph does not allow XOR painting.
*/
protected JComponent createHighlight()
{
JPanel panel = new JPanel();
panel.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED));
panel.setVisible(false);
panel.setOpaque(false);
return panel;
}
protected void reloadPoints(EdgeView edge) {
relevantEdge = edge;
r = new Rectangle[edge.getPointCount()];
for (int i = 0; i < r.length; i++)
r[i] = new Rectangle();
invalidate();
}
// Update and paint control points
public void paint(Graphics g) {
invalidate();
if (!edge.isLeaf())
return;
for (int i = 0; i < r.length; i++) {
if (isEdgeConnectable && !editing)
g.setColor(graph.getHandleColor());
else
g.setColor(graph.getLockedHandleColor());
g.fill3DRect((int) r[i].getX(), (int) r[i].getY(), (int) r[i]
.getWidth(), (int) r[i].getHeight(), true);
CellView port = null;
if (i == 0 && edge.getSource() != null)
port = edge.getSource();
else if (i == r.length - 1 && edge.getTarget() != null)
port = edge.getTarget();
if (port != null
|| (i == 0 && edge.getSourceParentView() != null)
|| (i == r.length - 1 && edge.getTargetParentView() != null)) {
g.setColor(graph.getLockedHandleColor());
Point2D tmp = (port != null) ? GraphConstants
.getOffset(port.getAllAttributes()) : null;
if (tmp != null) {
g.drawLine((int) r[i].getX() + 1,
(int) r[i].getY() + 1,
(int) (r[i].getX() + r[i].getWidth()) - 3,
(int) (r[i].getY() + r[i].getHeight()) - 3);
g.drawLine((int) r[i].getX() + 1,
(int) (r[i].getY() + r[i].getHeight()) - 3,
(int) (r[i].getX() + r[i].getWidth()) - 3,
(int) r[i].getY() + 1);
} else
g.drawRect((int) r[i].getX() + 2,
(int) r[i].getY() + 2,
(int) r[i].getWidth() - 5, (int) r[i]
.getHeight() - 5);
}
}
if (!graph.isXorEnabled()) {
firstOverlayCall = false;
overlay(g);
}
}
/**
* Highlights the given cell view or removes the highlight if
* no cell view is specified.
*
* @param graph
* @param cellView
*/
protected void highlight(JGraph graph, CellView cellView)
{
if (cellView != null)
{
highlight.setBounds(getHighlightBounds(graph, cellView));
if (highlight.getParent() == null)
{
graph.add(highlight);
highlight.setVisible(true);
}
}
else
{
if (highlight.getParent() != null)
{
highlight.setVisible(false);
highlight.getParent().remove(highlight);
}
}
}
/**
* Returns the bounds to be used to highlight the given cell view.
*
* @param graph
* @param cellView
* @return
*/
protected Rectangle getHighlightBounds(JGraph graph, CellView cellView)
{
boolean offset = (GraphConstants.getOffset(cellView.getAllAttributes()) != null);
Rectangle2D r = (offset) ? cellView.getBounds() : cellView
.getParentView().getBounds();
r = graph.toScreen((Rectangle2D) r.clone());
int s = 3;
return new Rectangle((int) (r.getX() - s), (int) (r.getY() - s),
(int) (r.getWidth() + 2 * s), (int) (r.getHeight() + 2 * s));
}
public void overlay(Graphics g) {
if (edge != null && !firstOverlayCall && edge.isLeaf()) {
// g.setColor(graph.getBackground()); // JDK 1.3
g.setColor(graph.getForeground());
if (graph.isXorEnabled()) {
g.setXORMode(graph.getBackground().darker());
}
Graphics2D g2 = (Graphics2D) g;
AffineTransform oldTransform = g2.getTransform();
g2.scale(graph.getScale(), graph.getScale());
graph.getUI().paintCell(g, edge, edge.getBounds(), true);
g2.setTransform(oldTransform);
if (graph.isXorEnabled())
{
if (isSourceEditing() && edge.getSource() != null)
paintPort(g, edge.getSource());
else if (isTargetEditing() && edge.getTarget() != null)
paintPort(g, edge.getTarget());
}
}
if (!graph.isXorEnabled())
{
if (isSourceEditing())
highlight(graph, edge.getSource());
else if (isTargetEditing())
highlight(graph, edge.getTarget());
}
firstOverlayCall = false;
}
protected void paintPort(Graphics g, CellView p) {
boolean offset = (GraphConstants.getOffset(p.getAllAttributes()) != null);
Rectangle2D r = (offset) ? p.getBounds() : p.getParentView()
.getBounds();
r = graph.toScreen((Rectangle2D) r.clone());
int s = 3;
r.setFrame(r.getX() - s, r.getY() - s, r.getWidth() + 2 * s, r
.getHeight()
+ 2 * s);
graph.getUI().paintCell(g, p, r, true);
}
protected boolean snap(boolean source, Point2D point) {
boolean connect = graph.isConnectable() && isEdgeConnectable;
Object port = graph.getPortForLocation(point.getX(), point.getY());
if (port != null
&& graph.getModel().getParent(port) == edge.getCell())
port = null;
if (port != null && connect) {
CellView portView = graph.getGraphLayoutCache().getMapping(
port, false);
Rectangle2D dirty = edge.getBounds();
dirty.add(portView.getParentView().getBounds());
if (GraphConstants.isConnectable(portView.getParentView()
.getAllAttributes())) {
Object cell = edge.getCell();
if (source && graph.getModel().acceptsSource(cell, port)) {
if (edge.getSource() != portView) {
edgeModified = true;
if (graph.isXorEnabled()) {
overlay(graph.getGraphics());
}
edge.setSource(portView);
edge.update(graph.getGraphLayoutCache());
if (graph.isXorEnabled()) {
overlay(graph.getGraphics());
} else {
dirty.add(edge.getBounds());
graph.repaint((int) dirty.getX(), (int) dirty
.getY(), (int) dirty.getWidth(),
(int) dirty.getHeight());
}
}
return true;
} else if (!source
&& graph.getModel().acceptsTarget(cell, port)) {
if (edge.getTarget() != portView) {
edgeModified = true;
if (graph.isXorEnabled()) {
overlay(graph.getGraphics());
}
edge.setTarget(portView);
edge.update(graph.getGraphLayoutCache());
if (graph.isXorEnabled()) {
overlay(graph.getGraphics());
} else {
dirty.add(edge.getBounds());
graph.repaint((int) dirty.getX(), (int) dirty
.getY(), (int) dirty.getWidth(),
(int) dirty.getHeight());
}
}
return true;
}
}
}
return false;
}
public boolean isConstrainedMoveEvent(MouseEvent e) {
GraphUI ui = graph.getUI();
if (ui instanceof BasicGraphUI)
return ((BasicGraphUI) ui).isConstrainedMoveEvent(e);
return false;
}
/**
* Returning true signifies a mouse event adds a new point to an edge.
*/
public boolean isAddPointEvent(MouseEvent event) {
return event.isPopupTrigger()
|| SwingUtilities.isRightMouseButton(event);
}
/**
* Returning true signifies a mouse event removes a given point.
*/
public boolean isRemovePointEvent(MouseEvent event) {
return event.isPopupTrigger()
|| SwingUtilities.isRightMouseButton(event);
}
protected boolean isSourceEditing() {
return source;
}
protected boolean isTargetEditing() {
return target;
}
/*
* Returns true if either the source, target, label or a point is being
* edited.
*/
protected boolean isEditing() {
return source || target || label || currentLabel >= 0
|| currentPoint != null;
}
/**
* Invoked when the mouse pointer has been moved on a component (with no
* buttons down).
*/
public void mouseMoved(MouseEvent event) {
for (int i = 0; i < r.length; i++)
if (r[i].contains(event.getPoint())) {
graph.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));
event.consume();
return;
}
if (loc.contains(event.getPoint()) && graph.isMoveable()
&& GraphConstants.isMoveable(edge.getAllAttributes())) {
graph.setCursor(new Cursor(Cursor.HAND_CURSOR));
event.consume();
}
if (extraLabelLocations != null && graph.isMoveable()
&& GraphConstants.isMoveable(edge.getAllAttributes())) {
for (int i = 0; i < extraLabelLocations.length; i++) {
if (extraLabelLocations[i].contains(event.getPoint())) {
graph.setCursor(new Cursor(Cursor.HAND_CURSOR));
event.consume();
}
}
}
}
// Handle mouse pressed event.
public void mousePressed(MouseEvent event) {
/* INV: currentPoint = null; source = target = label = false; */
if (!edge.isLeaf())
return;
boolean bendable = graph.isBendable()
&& GraphConstants.isBendable(edge.getAllAttributes());
int x = event.getX();
int y = event.getY();
// Detect hit on control point
int index = 0;
for (index = 0; index < r.length; index++)
{
if (r[index].contains(x, y))
{
if (EdgeView.LEGACY_DISCONNECTABLE)
{
currentPoint = edge.getPoint(index);
currentIndex = index;
source = index == 0;
target = index == r.length - 1;
break;
}
else
{
if ((index > 0 && index < r.length - 1)
|| GraphConstants.isDisconnectable(edge
.getAllAttributes()))
{
currentPoint = edge.getPoint(index);
currentIndex = index;
source = index == 0;
target = index == r.length - 1;
break;
}
else
{
event.consume();
}
}
}
}
// Detect hit on label
if (!isEditing() && graph.isMoveable()
&& GraphConstants.isMoveable(edge.getAllAttributes())
&& loc != null && loc.contains(x, y)
&& !isAddPointEvent(event) && !isRemovePointEvent(event)
&& graph.getEdgeLabelsMovable()) {
initialLabelLocation = (Point2D) edge.getLabelPosition()
.clone();
label = true;
}
// Detect hit on extra labels
else if (extraLabelLocations != null && !isEditing()
&& graph.isMoveable() && graph.getEdgeLabelsMovable()
&& GraphConstants.isMoveable(edge.getAllAttributes())) {
for (int i = 0; i < extraLabelLocations.length; i++) {
if (extraLabelLocations[i] != null
&& extraLabelLocations[i].contains(x, y)) {
currentLabel = i;
initialLabelLocation = (Point2D) edge
.getExtraLabelPosition(currentLabel).clone();
if (isRemovePointEvent(event)) {
edge.removeExtraLabel(i);
edgeModified = true;
mouseReleased(event);
}
break;
}
}
}
// Remove Point
if (isRemovePointEvent(event)
&& currentPoint != null
&& !source
&& !target
&& bendable
&& (edge.getSource() == null || currentIndex > 0)
&& (edge.getTarget() == null || currentIndex < edge
.getPointCount() - 1)) {
edge.removePoint(index);
edgeModified = true;
mouseReleased(event);
// Add Point
} else if (isAddPointEvent(event) && !isEditing() && bendable) {
int s = graph.getHandleSize();
Rectangle2D rect = graph.fromScreen(new Rectangle(x - s, y - s,
2 * s, 2 * s));
if (edge.intersects(graph, rect)) {
Point2D point = graph.fromScreen(graph.snap(new Point(event
.getPoint())));
double min = Double.MAX_VALUE, dist = 0;
for (int i = 0; i < edge.getPointCount() - 1; i++) {
Point2D p = edge.getPoint(i);
Point2D p1 = edge.getPoint(i + 1);
dist = new Line2D.Double(p, p1).ptSegDistSq(point);
if (dist < min) {
min = dist;
index = i + 1;
}
}
edge.addPoint(index, point);
edgeModified = true;
currentPoint = point;
reloadPoints(edge);
paint(graph.getGraphics());
}
}
if (isEditing())
event.consume();
}
public void mouseDragged(MouseEvent event) {
Rectangle2D dirty = edge.getBounds();
Point2D p = graph.fromScreen(new Point(event.getPoint()));
// Move Label
if (label || currentLabel >= 0) {
Rectangle2D r = edge.getBounds();
if (r != null) {
edgeModified = true;
if (graph.isXorEnabled()) {
overlay(graph.getGraphics());
}
if (!GraphConstants.isLabelAlongEdge(edge.getAllAttributes())) {
p = getRelativeLabelPosition(edge, p);
} else {
double x = p.getX();
double y = p.getY();
Point2D p0 = edge.getPoint(0);
double p0x = p0.getX();
double p0y = p0.getY();
Point2D vector = edge.getLabelVector();
double dx = vector.getX();
double dy = vector.getY();
double pex = p0.getX() + dx;
double pey = p0.getY() + dy;
double len = Math.sqrt(dx * dx + dy * dy);
if (len > 0) {
double u = GraphConstants.PERMILLE;
double posy = len
* (-y * dx + p0y * dx + x * dy - p0x * dy)
/ (-pey * dy + p0y * dy - dx * pex + dx * p0x);
double posx = u
* (-y * pey + y * p0y + p0y * pey - p0y * p0y
- pex * x + pex * p0x + p0x * x - p0x
* p0x)
/ (-pey * dy + p0y * dy - dx * pex + dx * p0x);
p = new Point2D.Double(posx, posy);
} else {
p = new Point2D.Double(x - p0.getX(), y - p0.getY());
}
}
if (label) {
edge.setLabelPosition(p);
} else {
edge.setExtraLabelPosition(currentLabel, p);
}
edge.update(graph.getGraphLayoutCache());
if (graph.isXorEnabled()) {
overlay(graph.getGraphics());
} else {
graph.repaint((int) dirty.getX() - 1,
(int) dirty.getY() - 1, (int) dirty.getWidth() + 2,
(int) dirty.getHeight() + 2);
}
}
} else if (isEditing() && currentPoint != null) {
boolean disconnectable = (!source && !target)
|| (graph.isDisconnectable() && GraphConstants
.isDisconnectable(orig.getAllAttributes()));
if (source)
disconnectable = disconnectable
&& ((orig.getSource() == null && orig
.getSourceParentView() == null)
|| (orig.getSource() != null && GraphConstants
.isDisconnectable(orig.getSource()
.getParentView()
.getAllAttributes())) || (orig
.getSourceParentView() != null && GraphConstants
.isDisconnectable(orig
.getSourceParentView()
.getAllAttributes())));
if (target)
disconnectable = disconnectable
&& ((orig.getTarget() == null && orig
.getTargetParentView() == null)
|| (orig.getTarget() != null && GraphConstants
.isDisconnectable(orig.getTarget()
.getParentView()
.getAllAttributes())) || (orig
.getTargetParentView() != null && GraphConstants
.isDisconnectable(orig
.getTargetParentView()
.getAllAttributes())));
// Find Source/Target Port
if (!((source && snap(true, event.getPoint())) || (target && snap(
false, event.getPoint())))
&& disconnectable) {
// Else Use Point
boolean acceptSource = source
&& (graph.getModel().acceptsSource(edge.getCell(),
null) || graph.isPreviewInvalidNullPorts());
boolean acceptTarget = target
&& (graph.getModel().acceptsTarget(edge.getCell(),
null) || graph.isPreviewInvalidNullPorts());
if (acceptSource || acceptTarget || !(source || target)) {
edgeModified = true;
if (edge.getSource() != null) {
dirty.add(edge.getSource().getParentView()
.getBounds());
}
if (edge.getTarget() != null) {
dirty.add(edge.getTarget().getParentView()
.getBounds());
}
if (graph.isXorEnabled()) {
overlay(graph.getGraphics());
}
p = graph.fromScreen(graph.snap(new Point(event
.getPoint())));
// Constrained movement
if (isConstrainedMoveEvent(event) && currentIndex >= 0) {
// Reset Initial Positions
EdgeView orig = (EdgeView) graph
.getGraphLayoutCache().getMapping(
edge.getCell(), false);
Point2D origPoint = orig.getPoint(currentIndex);
double totDx = p.getX() - origPoint.getX();
double totDy = p.getY() - origPoint.getY();
if (Math.abs(totDx) < Math.abs(totDy))
p.setLocation(origPoint.getX(), p.getY());
else
p.setLocation(p.getX(), origPoint.getY());
}
// Do not move into negative space
p.setLocation(Math.max(0, p.getX()), Math.max(0, p
.getY()));
currentPoint.setLocation(p);
if (source) {
edge.setPoint(0, p);
edge.setSource(null);
} else if (target) {
edge.setPoint(edge.getPointCount() - 1, p);
edge.setTarget(null);
}
edge.update(graph.getGraphLayoutCache());
dirty.add(edge.getBounds());
if (graph.isXorEnabled()) {
overlay(graph.getGraphics());
} else {
if (edge.getSource() != null) {
dirty.add(edge.getSource().getParentView()
.getBounds());
}
if (edge.getTarget() != null) {
dirty.add(edge.getTarget().getParentView()
.getBounds());
}
dirty = graph.toScreen((Rectangle2D) dirty.clone());
graph.repaint((int) dirty.getX(), (int) dirty
.getY(), (int) dirty.getWidth(),
(int) dirty.getHeight());
}
}
}
else if (!graph.isXorEnabled())
{
dirty.add(edge.getBounds());
dirty = graph.toScreen((Rectangle2D) dirty.clone());
graph.repaint((int) dirty.getX(), (int) dirty
.getY(), (int) dirty.getWidth(),
(int) dirty.getHeight());
}
}
}
protected Point2D getRelativeLabelPosition(EdgeView edge, Point2D p) {
int pointCount = edge.getPointCount();
double totalLength = 0;
double[] segments = new double[pointCount];
Point2D p0 = edge.getPoint(0);
Point2D pt = p0;
// Calculate the total length of the edge
for (int i = 1; i < pointCount; i++)
{
Point2D tmp = edge.getPoint(i);
if (tmp != null)
{
double dx = pt.getX() - tmp.getX();
double dy = pt.getY() - tmp.getY();
double segment = Math.sqrt(dx * dx + dy * dy);
segments[i - 1] = segment;
totalLength += segment;
pt = tmp;
}
}
// Work which line segment the point of the label is closest to
Point2D last = edge.getPoint(1);
Line2D line = new Line2D.Double(p0, last);
double minDist = line.ptSegDistSq(p);
int index = 0;
double tmp = 0;
double length = 0;
for (int i = 2; i < pointCount; i++)
{
tmp += segments[i-2];
line = new Line2D.Double(edge.getPoint(i), last);
double dist = line.ptSegDistSq(p);
if (dist < minDist) {
minDist = dist;
index = i-1;
length = tmp;
}
last = edge.getPoint(i);
}
double seg = segments[index];
pt = edge.getPoint(index);
double x2 = pt.getX();
double y2 = pt.getY();
Point2D pt2 = edge.getPoint(index+1);
double x1 = pt2.getX();
double y1 = pt2.getY();
double px = p.getX();
double py = p.getY();
double xSegment = x2 - x1;
double ySegment = y2 - y1;
px -= x1;
py -= y1;
double projlenSq = 0;
px = xSegment - px;
py = ySegment - py;
double dotprod = px * xSegment + py * ySegment;
if (dotprod <= 0.0)
{
projlenSq = 0;
}
else
{
projlenSq = dotprod * dotprod / (xSegment * xSegment + ySegment * ySegment);
}
double projlen = Math.sqrt(projlenSq);
if (projlen > seg)
{
projlen = seg;
}
double yDistance = Line2D.ptLineDist(pt2.getX(), pt2.getY(), pt.getX(), pt.getY(), p.getX(), p.getY());
int direction = Line2D.relativeCCW(pt2.getX(), pt2.getY(), pt.getX(), pt.getY(), p.getX(), p.getY());
if (direction == -1) {
yDistance = -yDistance;
}
// Constructs the relative point for the label
Point2D result = new Point2D.Double(((((totalLength/2 - length - projlen)/
totalLength)*-2)+1)*GraphConstants.PERMILLE / 2, yDistance);
// Use the utility method to find
Point2D storedRelativePosition = edge.convertRelativeLabelPositionToAbsolute(result);
if (p.equals(storedRelativePosition)) {
GraphConstants.setRemoveAttributes(edge.getAllAttributes(), new Object[] {GraphConstants.OFFSET});
edge.getAllAttributes().remove(GraphConstants.OFFSET);
} else {
Point2D off = new Point2D.Double(p.getX() - storedRelativePosition.getX(), p.getY() - storedRelativePosition.getY());
GraphConstants.setOffset(edge.getAllAttributes(), off);
}
return result;
}
// Handle mouse released event
public void mouseReleased(MouseEvent e) {
highlight(graph, null); // removes the highlight
boolean clone = e.isControlDown() && graph.isCloneable();
GraphModel model = graph.getModel();
Object source = (edge.getSource() != null) ? edge.getSource()
.getCell() : null;
Object target = (edge.getTarget() != null) ? edge.getTarget()
.getCell() : null;
if (edgeModified && model.acceptsSource(edge.getCell(), source)
&& model.acceptsTarget(edge.getCell(), target)) {
// Creates an extra label if the label was cloned
if (clone && initialLabelLocation != null) {
// Resets the dragging label position and adds a new label
// instead. Note: label locations are modified in-place
// which is why we need to clone at beginning.
Object value = null;
Point2D location = null;
Object[] extraLabels = GraphConstants.getExtraLabels(edge
.getAllAttributes());
if (label) {
location = (Point2D) edge.getLabelPosition().clone();
value = graph.convertValueToString(orig);
edge.setLabelPosition(initialLabelLocation);
} else {
location = (Point2D) edge.getExtraLabelPosition(
currentLabel).clone();
value = extraLabels[currentLabel];
edge.setExtraLabelPosition(currentLabel,
initialLabelLocation);
}
edge.addExtraLabel(location, value);
edge.update(graph.getGraphLayoutCache());
clone = false;
}
// Creates the data required for the edit/insert call
ConnectionSet cs = createConnectionSet(edge, clone);
Map nested = GraphConstants.createAttributes(
new CellView[] { edge }, null);
// The cached points may be different from what's
// in the attribute map if the edge is routed.
Map tmp = (Map) nested.get(edge.getCell());
List controlPoints = GraphConstants.getPoints(tmp);
List currentPoints = edge.getPoints();
// Checks if we're dealing with a routing algorithm
// and if we are, replaces only the source and target
// in the control point list.
if (controlPoints != currentPoints) {
controlPoints.set(0, edge.getPoint(0));
controlPoints.set(controlPoints.size() - 1, edge
.getPoint(edge.getPointCount() - 1));
}
if (clone) {
Map cellMap = graph.cloneCells(graph
.getDescendants(new Object[] { edge.getCell() }));
processNestedMap(nested, true);
nested = GraphConstants.replaceKeys(cellMap, nested);
cs = cs.clone(cellMap);
Object[] cells = cellMap.values().toArray();
graph.getGraphLayoutCache().insert(cells, nested, cs, null,
null);
} else {
processNestedMap(nested, false);
graph.getGraphLayoutCache().edit(nested, cs, null, null);
}
} else {
if (graph.isXorEnabled()) {
overlay(graph.getGraphics());
} else {
Rectangle2D dirty = edge.getBounds();
graph.repaint((int) dirty.getX(), (int) dirty.getY(),
(int) dirty.getWidth(), (int) dirty.getHeight());
}
edge.refresh(graph.getGraphLayoutCache(), graph.getGraphLayoutCache(),
false);
}
initialLabelLocation = null;
currentPoint = null;
this.edgeModified = false;
this.label = false;
this.source = false;
this.target = false;
currentLabel = -1;
currentIndex = -1;
firstOverlayCall = true;
e.consume();
}
protected void processNestedMap(Map nested, boolean clone) {
// subclassers can override this to modify the attributes
}
protected ConnectionSet createConnectionSet(EdgeView view,
boolean verbose) {
Object edge = view.getCell();
GraphModel model = graph.getModel();
ConnectionSet cs = new ConnectionSet();
Object sourcePort = null, targetPort = null;
if (view.getSource() != null)
sourcePort = view.getSource().getCell();
else if (view.getSourceParentView() != null)
sourcePort = model.getSource(edge);
if (view.getTarget() != null)
targetPort = view.getTarget().getCell();
else if (view.getTargetParentView() != null)
targetPort = model.getTarget(edge);
if (view.getTarget() != null)
targetPort = view.getTarget().getCell();
if (verbose || (sourcePort != model.getSource(edge) && source))
cs.connect(edge, sourcePort, true);
if (verbose || (targetPort != model.getTarget(edge) && target))
cs.connect(edge, targetPort, false);
return cs;
}
// Update control points
protected void invalidate() {
EdgeView e = relevantEdge;
int handlesize = graph.getHandleSize();
EdgeRenderer er = (EdgeRenderer) edge.getRenderer();
Point2D labelPosition = er.getLabelPosition(e);
Point2D p = null;
if (labelPosition != null) {
p = (Point2D)labelPosition.clone();
graph.toScreen(p);
}
Dimension d = er.getLabelSize(e, graph.convertValueToString(e));
if (p != null && d != null) {
Point2D s = graph.toScreen(new Point2D.Double(d.width,
d.height));
loc.setFrame(p.getX() - s.getX() / 2, p.getY() - s.getY()
/ 2, s.getX(), s.getY());
}
for (int i = 0; i < r.length; i++) {
p = e.getPoint(i);
p = graph.toScreen(new Point2D.Double(p.getX(), p.getY()));
r[i].setFrame(p.getX() - handlesize, p.getY() - handlesize,
2 * handlesize, 2 * handlesize);
}
if (extraLabelLocations != null) {
for (int i = 0; i < extraLabelLocations.length; i++) {
p = er.getExtraLabelPosition(e, i);
if (p != null) {
p = graph.toScreen((Point2D) p.clone());
d = er.getExtraLabelSize(graph, e, i);
if (d != null) {
Point2D s = graph.toScreen(new Point2D.Double(
d.width, d.height));
extraLabelLocations[i].setFrame(p.getX() - s.getX()
/ 2, p.getY() - s.getY() / 2, s.getX(), s
.getY());
}
}
}
}
}
}
public Point2D getPerimeterPoint(EdgeView edge, Point2D source, Point2D p) {
if (getPointCount() > 2)
return getPoint(getPointCount() / 2);
Point2D p0 = getPoint(0);
Point2D pe = getPoint(getPointCount() - 1);
return new Point2D.Double((pe.getX() + p0.getX()) / 2, (pe.getY() + p0
.getY()) / 2);
}
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