/*
Copyright 2008-2011 Gephi
Authors : Yudi Xue <yudi.xue@usask.ca>, Mathieu Bastian
Website : http://www.gephi.org
This file is part of Gephi.
DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
Copyright 2011 Gephi Consortium. All rights reserved.
The contents of this file are subject to the terms of either the GNU
General Public License Version 3 only ("GPL") or the Common
Development and Distribution License("CDDL") (collectively, the
"License"). You may not use this file except in compliance with the
License. You can obtain a copy of the License at
http://gephi.org/about/legal/license-notice/
or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the
specific language governing permissions and limitations under the
License. When distributing the software, include this License Header
Notice in each file and include the License files at
/cddl-1.0.txt and /gpl-3.0.txt. If applicable, add the following below the
License Header, with the fields enclosed by brackets [] replaced by
your own identifying information:
"Portions Copyrighted [year] [name of copyright owner]"
If you wish your version of this file to be governed by only the CDDL
or only the GPL Version 3, indicate your decision by adding
"[Contributor] elects to include this software in this distribution
under the [CDDL or GPL Version 3] license." If you do not indicate a
single choice of license, a recipient has the option to distribute
your version of this file under either the CDDL, the GPL Version 3 or
to extend the choice of license to its licensees as provided above.
However, if you add GPL Version 3 code and therefore, elected the GPL
Version 3 license, then the option applies only if the new code is
made subject to such option by the copyright holder.
Contributor(s):
Portions Copyrighted 2011 Gephi Consortium.
*/
package org.gephi.preview.plugin.renderers;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfGState;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.geom.GeneralPath;
import java.awt.geom.Line2D;
import java.util.Locale;
import org.gephi.graph.api.Edge;
import org.gephi.graph.api.Node;
import org.gephi.preview.api.*;
import org.gephi.preview.plugin.builders.EdgeBuilder;
import org.gephi.preview.plugin.builders.NodeBuilder;
import org.gephi.preview.plugin.items.EdgeItem;
import org.gephi.preview.plugin.items.NodeItem;
import org.gephi.preview.spi.ItemBuilder;
import org.gephi.preview.spi.Renderer;
import org.gephi.preview.types.EdgeColor;
import org.openide.util.NbBundle;
import org.openide.util.lookup.ServiceProvider;
import org.w3c.dom.Element;
/**
*
* @author Yudi Xue, Mathieu Bastian
*/
@ServiceProvider(service = Renderer.class, position = 100)
public class EdgeRenderer implements Renderer {
//Custom properties
public static final String EDGE_MIN_WEIGHT = "edge.min-weight";
public static final String EDGE_MAX_WEIGHT = "edge.max-weight";
public static final String BEZIER_CURVENESS = "edge.bezier-curveness";
public static final String SOURCE = "source";
public static final String TARGET = "target";
public static final String TARGET_RADIUS = "edge.target.radius";
public static final String SOURCE_RADIUS = "edge.source.radius";
//Default values
protected boolean defaultShowEdges = true;
protected float defaultThickness = 1;
protected boolean defaultRescaleWeight = true;
protected EdgeColor defaultColor = new EdgeColor(EdgeColor.Mode.MIXED);
protected boolean defaultEdgeCurved = true;
protected float defaultBezierCurviness = 0.2f;
protected int defaultOpacity = 100;
protected float defaultRadius = 0f;
private static final StraightEdgeRenderer STRAIGHT_RENDERER
= new StraightEdgeRenderer();
private static final CurvedEdgeRenderer CURVED_RENDERER
= new CurvedEdgeRenderer();
private static final SelfLoopEdgeRenderer SELF_LOOP_RENDERER
= new SelfLoopEdgeRenderer();
@Override
public void preProcess(PreviewModel previewModel) {
final PreviewProperties properties = previewModel.getProperties();
final Item[] edgeItems = previewModel.getItems(Item.EDGE);
//Put nodes in edge item
for (final Item item : edgeItems) {
final Edge edge = (Edge) item.getSource();
final Node source = edge.getSource();
final Node target = edge.getTarget();
final Item nodeSource = previewModel.getItem(Item.NODE, source);
final Item nodeTarget = previewModel.getItem(Item.NODE, target);
item.setData(SOURCE, nodeSource);
item.setData(TARGET, nodeTarget);
}
//Calculate max and min weight
double minWeight = Double.POSITIVE_INFINITY;
double maxWeight = Double.NEGATIVE_INFINITY;
for (Item edge : edgeItems) {
minWeight = Math.min(
minWeight,
(Double) edge.getData(EdgeItem.WEIGHT));
maxWeight = Math.max(
maxWeight,
(Double) edge.getData(EdgeItem.WEIGHT));
}
properties.putValue(EDGE_MIN_WEIGHT, minWeight);
properties.putValue(EDGE_MAX_WEIGHT, maxWeight);
//Put bezier curveness in properties
if (!properties.hasProperty(BEZIER_CURVENESS)) {
properties.putValue(BEZIER_CURVENESS, defaultBezierCurviness);
}
//Rescale weight if necessary - and avoid negative weights
final boolean rescaleWeight = properties.getBooleanValue(
PreviewProperty.EDGE_RESCALE_WEIGHT);
for (final Item item : edgeItems) {
double weight = (Double) item.getData(EdgeItem.WEIGHT);
//Rescale weight
if (rescaleWeight) {
if (!Double.isInfinite(minWeight)
&& !Double.isInfinite(maxWeight)
&& maxWeight != minWeight) {
final double ratio = 1.0 / (maxWeight - minWeight);
weight = (weight - minWeight) * ratio;
}
} else if (minWeight <= 0) {
//Avoid negative weight
weight += Math.abs(minWeight) + 1;
}
//Multiply by thickness
weight *= properties.getFloatValue(PreviewProperty.EDGE_THICKNESS);
item.setData(EdgeItem.WEIGHT, weight);
}
//Radius
for (final Item item : edgeItems) {
if (!(Boolean) item.getData(EdgeItem.SELF_LOOP)) {
final float edgeRadius
= properties.getFloatValue(PreviewProperty.EDGE_RADIUS);
boolean isDirected = (Boolean) item.getData(EdgeItem.DIRECTED);
if (isDirected
|| edgeRadius > 0F) {
//Target
final Item targetItem = (Item) item.getData(TARGET);
final Double weight = item.getData(EdgeItem.WEIGHT);
//Avoid negative arrow size:
float arrowSize = properties.getFloatValue(
PreviewProperty.ARROW_SIZE);
if (arrowSize < 0F) {
arrowSize = 0F;
}
final float arrowRadiusSize = isDirected ? arrowSize * weight.floatValue() : 0f;
final float targetRadius = -(edgeRadius
+ (Float) targetItem.getData(NodeItem.SIZE) / 2f
+ properties.getFloatValue(PreviewProperty.NODE_BORDER_WIDTH) / 2f //We have to divide by 2 because the border stroke is not only an outline but also draws the other half of the curve inside the node
+ arrowRadiusSize
);
item.setData(TARGET_RADIUS, targetRadius);
//Source
final Item sourceItem = (Item) item.getData(SOURCE);
final float sourceRadius = -(edgeRadius
+ (Float) sourceItem.getData(NodeItem.SIZE) / 2f
+ properties.getFloatValue(PreviewProperty.NODE_BORDER_WIDTH) / 2f
);
item.setData(SOURCE_RADIUS, sourceRadius);
}
}
}
}
@Override
public void render(
Item item,
RenderTarget target,
PreviewProperties properties) {
if (isSelfLoopEdge(item)) {
SELF_LOOP_RENDERER.render(item, target, properties);
} else if (properties.getBooleanValue(PreviewProperty.EDGE_CURVED)) {
CURVED_RENDERER.render(item, target, properties);
} else {
STRAIGHT_RENDERER.render(item, target, properties);
}
}
@Override
public CanvasSize getCanvasSize(Item item, PreviewProperties properties) {
if (isSelfLoopEdge(item)) {
return SELF_LOOP_RENDERER.getCanvasSize(item, properties);
} else if (properties.getBooleanValue(PreviewProperty.EDGE_CURVED)) {
return CURVED_RENDERER.getCanvasSize(item, properties);
} else {
return STRAIGHT_RENDERER.getCanvasSize(item, properties);
}
}
@Override
public PreviewProperty[] getProperties() {
return new PreviewProperty[]{
PreviewProperty.createProperty(this, PreviewProperty.SHOW_EDGES, Boolean.class,
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.display.displayName"),
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.display.description"),
PreviewProperty.CATEGORY_EDGES).setValue(defaultShowEdges),
PreviewProperty.createProperty(this, PreviewProperty.EDGE_THICKNESS, Float.class,
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.thickness.displayName"),
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.thickness.description"),
PreviewProperty.CATEGORY_EDGES, PreviewProperty.SHOW_EDGES).setValue(defaultThickness),
PreviewProperty.createProperty(this, PreviewProperty.EDGE_RESCALE_WEIGHT, Boolean.class,
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.rescaleWeight.displayName"),
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.rescaleWeight.description"),
PreviewProperty.CATEGORY_EDGES, PreviewProperty.SHOW_EDGES).setValue(defaultRescaleWeight),
PreviewProperty.createProperty(this, PreviewProperty.EDGE_COLOR, EdgeColor.class,
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.color.displayName"),
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.color.description"),
PreviewProperty.CATEGORY_EDGES, PreviewProperty.SHOW_EDGES).setValue(defaultColor),
PreviewProperty.createProperty(this, PreviewProperty.EDGE_OPACITY, Float.class,
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.opacity.displayName"),
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.opacity.description"),
PreviewProperty.CATEGORY_EDGES, PreviewProperty.SHOW_EDGES).setValue(defaultOpacity),
PreviewProperty.createProperty(this, PreviewProperty.EDGE_CURVED, Boolean.class,
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.curvedEdges.displayName"),
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.curvedEdges.description"),
PreviewProperty.CATEGORY_EDGES, PreviewProperty.SHOW_EDGES).setValue(defaultEdgeCurved),
PreviewProperty.createProperty(this, PreviewProperty.EDGE_RADIUS, Float.class,
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.radius.displayName"),
NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.property.radius.description"),
PreviewProperty.CATEGORY_EDGES, PreviewProperty.SHOW_EDGES).setValue(defaultRadius),};
}
@Override
public boolean isRendererForitem(Item item, PreviewProperties properties) {
if (item instanceof EdgeItem) {
return showEdges(properties);
}
return false;
}
@Override
public boolean needsItemBuilder(ItemBuilder itemBuilder, PreviewProperties properties) {
return (itemBuilder instanceof EdgeBuilder
|| itemBuilder instanceof NodeBuilder)
&& showEdges(properties);//Needs some properties of nodes
}
@Override
public String getDisplayName() {
return NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.name");
}
public static Color getColor(
final Item item,
final PreviewProperties properties) {
final Item sourceItem = item.getData(SOURCE);
final Item targetItem = item.getData(TARGET);
final EdgeColor edgeColor
= (EdgeColor) properties.getValue(PreviewProperty.EDGE_COLOR);
final Color color = edgeColor.getColor(
(Color) item.getData(EdgeItem.COLOR),
(Color) sourceItem.getData(NodeItem.COLOR),
(Color) targetItem.getData(NodeItem.COLOR));
return new Color(
color.getRed(),
color.getGreen(),
color.getBlue(),
(int) (getAlpha(properties) * 255));
}
private boolean showEdges(PreviewProperties properties) {
return properties.getBooleanValue(PreviewProperty.SHOW_EDGES)
&& !properties.getBooleanValue(PreviewProperty.MOVING);
}
private static boolean isSelfLoopEdge(final Item item) {
final Item sourceItem = item.getData(SOURCE);
final Item targetItem = item.getData(TARGET);
return item instanceof EdgeItem && sourceItem == targetItem;
}
private static float getAlpha(final PreviewProperties properties) {
float opacity = properties.getIntValue(PreviewProperty.EDGE_OPACITY) / 100F;
if (opacity < 0) {
opacity = 0;
}
if (opacity > 1) {
opacity = 1;
}
return opacity;
}
private static float getThickness(final Item item) {
return ((Double) item.getData(EdgeItem.WEIGHT)).floatValue();
}
private static class StraightEdgeRenderer {
public void render(
final Item item,
final RenderTarget target,
final PreviewProperties properties) {
final Helper h = new Helper(item);
final Color color = getColor(item, properties);
if (target instanceof G2DTarget) {
final Graphics2D graphics = ((G2DTarget) target).getGraphics();
graphics.setStroke(new BasicStroke(
getThickness(item),
BasicStroke.CAP_SQUARE,
BasicStroke.JOIN_MITER));
graphics.setColor(color);
final Line2D.Float line
= new Line2D.Float(h.x1, h.y1, h.x2, h.y2);
graphics.draw(line);
} else if (target instanceof SVGTarget) {
final SVGTarget svgTarget = (SVGTarget) target;
final Element edgeElem = svgTarget.createElement("path");
edgeElem.setAttribute("class", String.format(
"%s %s",
((Node) h.sourceItem.getSource()).getId(),
((Node) h.targetItem.getSource()).getId()));
edgeElem.setAttribute("d", String.format(
Locale.ENGLISH,
"M %f,%f L %f,%f",
h.x1, h.y1, h.x2, h.y2));
edgeElem.setAttribute("stroke", svgTarget.toHexString(color));
edgeElem.setAttribute(
"stroke-width",
Float.toString(getThickness(item)
* svgTarget.getScaleRatio()));
edgeElem.setAttribute(
"stroke-opacity",
(color.getAlpha() / 255f) + "");
edgeElem.setAttribute("fill", "none");
svgTarget.getTopElement(SVGTarget.TOP_EDGES)
.appendChild(edgeElem);
} else if (target instanceof PDFTarget) {
final PDFTarget pdfTarget = (PDFTarget) target;
final PdfContentByte cb = pdfTarget.getContentByte();
cb.moveTo(h.x1, -h.y1);
cb.lineTo(h.x2, -h.y2);
cb.setRGBColorStroke(
color.getRed(),
color.getGreen(),
color.getBlue());
cb.setLineWidth(getThickness(item));
if (color.getAlpha() < 255) {
cb.saveState();
final PdfGState gState = new PdfGState();
gState.setStrokeOpacity(
getAlpha(properties));
cb.setGState(gState);
}
cb.stroke();
if (color.getAlpha() < 255) {
cb.restoreState();
}
}
}
public CanvasSize getCanvasSize(
final Item item,
final PreviewProperties properties) {
final Item sourceItem = item.getData(SOURCE);
final Item targetItem = item.getData(TARGET);
final Float x1 = sourceItem.getData(NodeItem.X);
final Float x2 = targetItem.getData(NodeItem.X);
final Float y1 = sourceItem.getData(NodeItem.Y);
final Float y2 = targetItem.getData(NodeItem.Y);
final float minX = Math.min(x1, x2);
final float minY = Math.min(y1, y2);
final float maxX = Math.max(x1, x2);
final float maxY = Math.max(y1, y2);
return new CanvasSize(minX, minY, maxX - minX, maxY - minY);
}
private class Helper {
public final Item sourceItem;
public final Item targetItem;
public final Float x1;
public final Float x2;
public final Float y1;
public final Float y2;
public Helper(final Item item) {
sourceItem = item.getData(SOURCE);
targetItem = item.getData(TARGET);
Float _x1 = sourceItem.getData(NodeItem.X);
Float _x2 = targetItem.getData(NodeItem.X);
Float _y1 = sourceItem.getData(NodeItem.Y);
Float _y2 = targetItem.getData(NodeItem.Y);
//Target radius - to start at the base of the arrow
final Float targetRadius = item.getData(TARGET_RADIUS);
//Avoid edge from passing the node's center:
if (targetRadius != null && targetRadius < 0) {
Vector direction = new Vector(_x2, _y2);
direction.sub(new Vector(_x1, _y1));
direction.normalize();
direction.mult(targetRadius);
direction.add(new Vector(_x2, _y2));
_x2 = direction.x;
_y2 = direction.y;
}
//Source radius
final Float sourceRadius = item.getData(SOURCE_RADIUS);
//Avoid edge from passing the node's center:
if (sourceRadius != null && sourceRadius < 0) {
Vector direction = new Vector(_x1, _y1);
direction.sub(new Vector(_x2, _y2));
direction.normalize();
direction.mult(sourceRadius);
direction.add(new Vector(_x1, _y1));
_x1 = direction.x;
_y1 = direction.y;
}
x1 = _x1;
y1 = _y1;
x2 = _x2;
y2 = _y2;
}
}
}
private static class CurvedEdgeRenderer {
public void render(
final Item item,
final RenderTarget target,
final PreviewProperties properties) {
final Helper h = new Helper(item, properties);
final Color color = getColor(item, properties);
if (target instanceof G2DTarget) {
final Graphics2D graphics = ((G2DTarget) target).getGraphics();
graphics.setStroke(new BasicStroke(getThickness(item)));
graphics.setColor(color);
final GeneralPath gp
= new GeneralPath(GeneralPath.WIND_NON_ZERO);
gp.moveTo(h.x1, h.y1);
gp.curveTo(h.v1.x, h.v1.y, h.v2.x, h.v2.y, h.x2, h.y2);
graphics.draw(gp);
} else if (target instanceof SVGTarget) {
final SVGTarget svgTarget = (SVGTarget) target;
final Element edgeElem = svgTarget.createElement("path");
edgeElem.setAttribute("class", String.format(
"%s %s",
((Node) h.sourceItem.getSource()).getId(),
((Node) h.targetItem.getSource()).getId()));
edgeElem.setAttribute("d", String.format(
Locale.ENGLISH,
"M %f,%f C %f,%f %f,%f %f,%f",
h.x1, h.y1,
h.v1.x, h.v1.y, h.v2.x, h.v2.y, h.x2, h.y2));
edgeElem.setAttribute("stroke", svgTarget.toHexString(color));
edgeElem.setAttribute(
"stroke-width",
Float.toString(getThickness(item)
* svgTarget.getScaleRatio()));
edgeElem.setAttribute(
"stroke-opacity",
(color.getAlpha() / 255f) + "");
edgeElem.setAttribute("fill", "none");
svgTarget.getTopElement(SVGTarget.TOP_EDGES)
.appendChild(edgeElem);
} else if (target instanceof PDFTarget) {
final PDFTarget pdfTarget = (PDFTarget) target;
final PdfContentByte cb = pdfTarget.getContentByte();
cb.moveTo(h.x1, -h.y1);
cb.curveTo(h.v1.x, -h.v1.y, h.v2.x, -h.v2.y, h.x2, -h.y2);
cb.setRGBColorStroke(
color.getRed(),
color.getGreen(),
color.getBlue());
cb.setLineWidth(getThickness(item));
if (color.getAlpha() < 255) {
cb.saveState();
final PdfGState gState = new PdfGState();
gState.setStrokeOpacity(
getAlpha(properties));
cb.setGState(gState);
}
cb.stroke();
if (color.getAlpha() < 255) {
cb.restoreState();
}
}
}
public CanvasSize getCanvasSize(
final Item item,
final PreviewProperties properties) {
final Helper h = new Helper(item, properties);
final float minX
= Math.min(Math.min(Math.min(h.x1, h.x2), h.v1.x), h.v2.x);
final float minY
= Math.min(Math.min(Math.min(h.y1, h.y2), h.v1.y), h.v2.y);
final float maxX
= Math.max(Math.max(Math.max(h.x1, h.x2), h.v1.x), h.v2.x);
final float maxY
= Math.max(Math.max(Math.max(h.y1, h.y2), h.v1.y), h.v2.y);
return new CanvasSize(minX, minY, maxX - minX, maxY - minY);
}
private class Helper {
public final Item sourceItem;
public final Item targetItem;
public final Float x1;
public final Float x2;
public final Float y1;
public final Float y2;
public final Vector v1;
public final Vector v2;
public Helper(
final Item item,
final PreviewProperties properties) {
sourceItem = item.getData(SOURCE);
targetItem = item.getData(TARGET);
x1 = sourceItem.getData(NodeItem.X);
x2 = targetItem.getData(NodeItem.X);
y1 = sourceItem.getData(NodeItem.Y);
y2 = targetItem.getData(NodeItem.Y);
final Vector direction = new Vector(x2, y2);
direction.sub(new Vector(x1, y1));
final float length = direction.mag();
direction.normalize();
final float factor
= properties.getFloatValue(BEZIER_CURVENESS) * length;
final Vector n = new Vector(direction.y, -direction.x);
n.mult(factor);
v1 = computeCtrlPoint(x1, y1, direction, factor, n);
v2 = computeCtrlPoint(x2, y2, direction, -factor, n);
}
private Vector computeCtrlPoint(
final Float x,
final Float y,
final Vector direction,
final float factor,
final Vector normalVector) {
final Vector v = new Vector(direction.x, direction.y);
v.mult(factor);
v.add(new Vector(x, y));
v.add(normalVector);
return v;
}
}
}
private static class SelfLoopEdgeRenderer {
public static final String ID = "SelfLoopEdge";
public void render(
final Item item,
final RenderTarget target,
final PreviewProperties properties) {
final Helper h = new Helper(item);
final Color color = getColor(item, properties);
//FIXME: This still won't draw a curve (draws a line) in any of the targets and I don't know why
if (target instanceof G2DTarget) {
final Graphics2D graphics = ((G2DTarget) target).getGraphics();
graphics.setStroke(new BasicStroke(getThickness(item)));
graphics.setColor(color);
final GeneralPath gp
= new GeneralPath(GeneralPath.WIND_NON_ZERO);
gp.moveTo(h.x, h.y);
gp.curveTo(h.v1.x, h.v1.y, h.v2.x, h.v2.y, h.x, h.y);
graphics.draw(gp);
} else if (target instanceof SVGTarget) {
final SVGTarget svgTarget = (SVGTarget) target;
final Element selfLoopElem = svgTarget.createElement("path");
selfLoopElem.setAttribute("d", String.format(
Locale.ENGLISH,
"M %f,%f C %f,%f %f,%f %f,%f",
h.x, h.y, h.v1.x, h.v1.y, h.v2.x, h.v2.y, h.x, h.y));
selfLoopElem.setAttribute("class", h.node.getId().toString());
selfLoopElem.setAttribute(
"stroke",
svgTarget.toHexString(color));
selfLoopElem.setAttribute(
"stroke-opacity",
(color.getAlpha() / 255f) + "");
selfLoopElem.setAttribute("stroke-width", Float.toString(
getThickness(item) * svgTarget.getScaleRatio()));
selfLoopElem.setAttribute("fill", "none");
svgTarget.getTopElement(SVGTarget.TOP_EDGES)
.appendChild(selfLoopElem);
} else if (target instanceof PDFTarget) {
final PDFTarget pdfTarget = (PDFTarget) target;
final PdfContentByte cb = pdfTarget.getContentByte();
cb.moveTo(h.x, -h.y);
cb.curveTo(h.v1.x, -h.v1.y, h.v2.x, -h.v2.y, h.x, -h.y);
cb.setRGBColorStroke(
color.getRed(),
color.getGreen(),
color.getBlue());
cb.setLineWidth(getThickness(item));
if (color.getAlpha() < 255) {
cb.saveState();
final PdfGState gState = new PdfGState();
gState.setStrokeOpacity(
getAlpha(properties));
cb.setGState(gState);
}
cb.stroke();
if (color.getAlpha() < 255) {
cb.restoreState();
}
}
}
public CanvasSize getCanvasSize(
final Item item,
final PreviewProperties properties) {
final Helper h = new Helper(item);
final float minX = Math.min(Math.min(h.x, h.v1.x), h.v2.x);
final float minY = Math.min(Math.min(h.y, h.v1.y), h.v2.y);
final float maxX = Math.max(Math.max(h.x, h.v1.x), h.v2.x);
final float maxY = Math.max(Math.max(h.y, h.v1.y), h.v2.y);
return new CanvasSize(minX, minY, maxX - minX, maxY - minY);
}
private class Helper {
public final Float x;
public final Float y;
public final Node node;
public final Vector v1;
public final Vector v2;
public Helper(final Item item) {
node = ((Edge) item.getSource()).getSource();
Item nodeSource = item.getData(SOURCE);
x = nodeSource.getData(NodeItem.X);
y = nodeSource.getData(NodeItem.Y);
Float size = nodeSource.getData(NodeItem.SIZE);
v1 = new Vector(x, y);
v1.add(size, -size);
v2 = new Vector(x, y);
v2.add(size, size);
}
}
}
}