Java tutorial
/* 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. 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Contributor(s): Portions Copyrighted 2011 Gephi Consortium. */ package org.frobic.colorednodes.renderers; import com.itextpdf.text.pdf.PdfContentByte; import com.itextpdf.text.pdf.PdfGState; import java.awt.Color; import java.util.Locale; //import javax.swing.Renderer; import org.gephi.graph.api.Edge; import org.gephi.graph.api.Node; import org.gephi.preview.api.Item; import org.gephi.preview.api.PDFTarget; import org.gephi.preview.api.PreviewModel; import org.gephi.preview.api.PreviewProperties; import org.gephi.preview.api.PreviewProperty; import org.gephi.preview.api.ProcessingTarget; import org.gephi.preview.api.RenderTarget; import org.gephi.preview.api.SVGTarget; import org.gephi.preview.plugin.items.EdgeItem; import org.frobic.colorednodes.items.NodeItem; import org.gephi.preview.plugin.renderers.EdgeRenderer; 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; import processing.core.PGraphics; import processing.core.PVector; /** * * @author Yudi Xue, Mathieu Bastian */ @ServiceProvider(service = Renderer.class, position = 100) public class NewEdgeRenderer extends EdgeRenderer { //Custom propertie @Override public void preProcess(PreviewModel previewModel) { PreviewProperties properties = previewModel.getProperties(); Item[] edgeItems = previewModel.getItems(Item.EDGE); //Put nodes in edge item for (Item item : edgeItems) { Edge edge = (Edge) item.getSource(); Node source = edge.getSource().getNodeData().getRootNode(); Node target = edge.getTarget().getNodeData().getRootNode(); Item nodeSource = previewModel.getItem(Item.NODE, source); Item nodeTarget = previewModel.getItem(Item.NODE, target); item.setData(SOURCE, nodeSource); item.setData(TARGET, nodeTarget); } //Calculate max and min weight float minWeight = Float.POSITIVE_INFINITY; float maxWeight = Float.NEGATIVE_INFINITY; for (Item edge : edgeItems) { minWeight = Math.min(minWeight, (Float) edge.getData(EdgeItem.WEIGHT)); maxWeight = Math.max(maxWeight, (Float) 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 boolean rescaleWeight = properties.getBooleanValue(PreviewProperty.EDGE_RESCALE_WEIGHT); for (Item item : edgeItems) { float weight = (Float) item.getData(EdgeItem.WEIGHT); //Rescale weight if (rescaleWeight) { if (!Double.isInfinite(minWeight) && !Double.isInfinite(maxWeight) && maxWeight != minWeight) { float ratio = 1f / (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 (Item item : edgeItems) { if (!(Boolean) item.getData(EdgeItem.SELF_LOOP)) { float edgeRadius = properties.getFloatValue(PreviewProperty.EDGE_RADIUS); float targetRadius = 0; if ((Boolean) item.getData(EdgeItem.DIRECTED) || edgeRadius > 0f) { //Target Item targetItem = (Item) item.getData(TARGET); Float weight = item.getData(EdgeItem.WEIGHT); //Avoid negative arrow size: float arrowSize = properties.getFloatValue(PreviewProperty.ARROW_SIZE); if (arrowSize < 0) { arrowSize = 0; } float size = arrowSize * weight; targetRadius = -(edgeRadius + (Float) targetItem.getData(NodeItem.SIZE) / 2f + properties.getFloatValue(PreviewProperty.NODE_BORDER_WIDTH)); item.setData(TARGET_RADIUS, targetRadius - size); } if (edgeRadius > 0) { //Source Item sourceItem = (Item) item.getData(SOURCE); float sourceRadius = -(edgeRadius + (Float) sourceItem.getData(NodeItem.SIZE) / 2f + properties.getFloatValue(PreviewProperty.NODE_BORDER_WIDTH)); item.setData(SOURCE_RADIUS, sourceRadius); } } } } @Override public void render(Item item, RenderTarget target, PreviewProperties properties) { //Get nodes Item sourceItem = item.getData(SOURCE); Item targetItem = item.getData(TARGET); //Weight and color Float weight = item.getData(EdgeItem.WEIGHT); EdgeColor edgeColor = (EdgeColor) properties.getValue(PreviewProperty.EDGE_COLOR); Color color = edgeColor.getColor((Color) item.getData(EdgeItem.COLOR), (Color) sourceItem.getData(NodeItem.COLOR), (Color) targetItem.getData(NodeItem.COLOR)); int alpha = (int) ((properties.getIntValue(PreviewProperty.EDGE_OPACITY) / 100f) * 255f); color = new Color(color.getRed(), color.getGreen(), color.getBlue(), alpha); if (sourceItem == targetItem) { renderSelfLoop(sourceItem, weight, color, properties, target); } else if (properties.getBooleanValue(PreviewProperty.EDGE_CURVED) && weight >= 0.1) { renderCurvedEdge(item, sourceItem, targetItem, weight, color, properties, target); } else if (weight >= 0.1) { renderStraightEdge(item, sourceItem, targetItem, weight, color, properties, target); } } @Override public void renderSelfLoop(Item nodeItem, float thickness, Color color, PreviewProperties properties, RenderTarget renderTarget) { Float x = nodeItem.getData(NodeItem.X); Float y = nodeItem.getData(NodeItem.Y); Float size = nodeItem.getData(NodeItem.SIZE); Node node = (Node) nodeItem.getSource(); PVector v1 = new PVector(x, y); v1.add(size, -size, 0); PVector v2 = new PVector(x, y); v2.add(size, size, 0); if (renderTarget instanceof ProcessingTarget) { PGraphics graphics = ((ProcessingTarget) renderTarget).getGraphics(); graphics.strokeWeight(thickness); graphics.stroke(color.getRed(), color.getGreen(), color.getBlue(), color.getAlpha()); graphics.noFill(); graphics.bezier(x, y, v1.x, v1.y, v1.x, v2.y, x, y); } else if (renderTarget instanceof SVGTarget) { SVGTarget svgTarget = (SVGTarget) renderTarget; Element selfLoopElem = svgTarget.createElement("path"); selfLoopElem.setAttribute("d", String.format(Locale.ENGLISH, "M %f,%f C %f,%f %f,%f %f,%f", x, y, v1.x, v1.y, v2.x, v2.y, x, y)); selfLoopElem.setAttribute("class", node.getNodeData().getId()); selfLoopElem.setAttribute("stroke", svgTarget.toHexString(color)); selfLoopElem.setAttribute("stroke-opacity", (color.getAlpha() / 255f) + ""); selfLoopElem.setAttribute("stroke-width", Float.toString(thickness * svgTarget.getScaleRatio())); selfLoopElem.setAttribute("fill", "none"); svgTarget.getTopElement(SVGTarget.TOP_EDGES).appendChild(selfLoopElem); } else if (renderTarget instanceof PDFTarget) { PDFTarget pdfTarget = (PDFTarget) renderTarget; PdfContentByte cb = pdfTarget.getContentByte(); cb.moveTo(x, -y); cb.curveTo(v1.x, -v1.y, v2.x, -v2.y, x, -y); cb.setRGBColorStroke(color.getRed(), color.getGreen(), color.getBlue()); cb.setLineWidth(thickness); if (color.getAlpha() < 255) { cb.saveState(); float alpha = color.getAlpha() / 255f; PdfGState gState = new PdfGState(); gState.setStrokeOpacity(alpha); cb.setGState(gState); } cb.stroke(); if (color.getAlpha() < 255) { cb.restoreState(); } } } @Override public void renderCurvedEdge(Item edgeItem, Item sourceItem, Item targetItem, float thickness, Color color, PreviewProperties properties, RenderTarget renderTarget) { Edge edge = (Edge) edgeItem.getSource(); Float x1 = sourceItem.getData(NodeItem.X); Float x2 = targetItem.getData(NodeItem.X); Float y1 = sourceItem.getData(NodeItem.Y); Float y2 = targetItem.getData(NodeItem.Y); //Curved edgs PVector direction = new PVector(x2, y2); direction.sub(new PVector(x1, y1)); float length = direction.mag(); direction.normalize(); float factor = properties.getFloatValue(BEZIER_CURVENESS) * length; // normal vector to the edge PVector n = new PVector(direction.y, -direction.x); n.mult(factor); // first control point PVector v1 = new PVector(direction.x, direction.y); v1.mult(factor); v1.add(new PVector(x1, y1)); v1.add(n); // second control point PVector v2 = new PVector(direction.x, direction.y); v2.mult(-factor); v2.add(new PVector(x2, y2)); v2.add(n); if (renderTarget instanceof ProcessingTarget) { PGraphics graphics = ((ProcessingTarget) renderTarget).getGraphics(); graphics.strokeWeight(thickness); graphics.stroke(color.getRed(), color.getGreen(), color.getBlue(), color.getAlpha()); graphics.noFill(); graphics.bezier(x1, y1, v1.x, v1.y, v2.x, v2.y, x2, y2); } else if (renderTarget instanceof SVGTarget) { SVGTarget svgTarget = (SVGTarget) renderTarget; Element edgeElem = svgTarget.createElement("path"); edgeElem.setAttribute("class", edge.getSource().getNodeData().getId() + " " + edge.getTarget().getNodeData().getId()); edgeElem.setAttribute("d", String.format(Locale.ENGLISH, "M %f,%f C %f,%f %f,%f %f,%f", x1, y1, v1.x, v1.y, v2.x, v2.y, x2, y2)); edgeElem.setAttribute("stroke", svgTarget.toHexString(color)); edgeElem.setAttribute("stroke-width", Float.toString(thickness * svgTarget.getScaleRatio())); edgeElem.setAttribute("stroke-opacity", (color.getAlpha() / 255f) + ""); edgeElem.setAttribute("fill", "none"); svgTarget.getTopElement(SVGTarget.TOP_EDGES).appendChild(edgeElem); } else if (renderTarget instanceof PDFTarget) { PDFTarget pdfTarget = (PDFTarget) renderTarget; PdfContentByte cb = pdfTarget.getContentByte(); cb.moveTo(x1, -y1); cb.curveTo(v1.x, -v1.y, v2.x, -v2.y, x2, -y2); cb.setRGBColorStroke(color.getRed(), color.getGreen(), color.getBlue()); cb.setLineWidth(thickness); if (color.getAlpha() < 255) { cb.saveState(); float alpha = color.getAlpha() / 255f; PdfGState gState = new PdfGState(); gState.setStrokeOpacity(alpha); cb.setGState(gState); } cb.stroke(); if (color.getAlpha() < 255) { cb.restoreState(); } } } @Override public void renderStraightEdge(Item edgeItem, Item sourceItem, Item targetItem, float thickness, Color color, PreviewProperties properties, RenderTarget renderTarget) { Edge edge = (Edge) edgeItem.getSource(); 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 Float targetRadius = edgeItem.getData(TARGET_RADIUS); //Avoid edge from passing the node's center: if (targetRadius != null && targetRadius < 0) { PVector direction = new PVector(x2, y2); direction.sub(new PVector(x1, y1)); direction.normalize(); direction = new PVector(direction.x, direction.y); direction.mult(targetRadius); direction.add(new PVector(x2, y2)); x2 = direction.x; y2 = direction.y; } //Source radius Float sourceRadius = edgeItem.getData(SOURCE_RADIUS); //Avoid edge from passing the node's center: if (sourceRadius != null && sourceRadius < 0) { PVector direction = new PVector(x1, y1); direction.sub(new PVector(x2, y2)); direction.normalize(); direction = new PVector(direction.x, direction.y); direction.mult(sourceRadius); direction.add(new PVector(x1, y1)); x1 = direction.x; y1 = direction.y; } if (renderTarget instanceof ProcessingTarget) { PGraphics graphics = ((ProcessingTarget) renderTarget).getGraphics(); graphics.strokeWeight(thickness); graphics.strokeCap(PGraphics.SQUARE); graphics.stroke(color.getRed(), color.getGreen(), color.getBlue(), color.getAlpha()); graphics.noFill(); graphics.line(x1, y1, x2, y2); } else if (renderTarget instanceof SVGTarget) { SVGTarget svgTarget = (SVGTarget) renderTarget; Element edgeElem = svgTarget.createElement("path"); edgeElem.setAttribute("class", edge.getSource().getNodeData().getId() + " " + edge.getTarget().getNodeData().getId()); edgeElem.setAttribute("d", String.format(Locale.ENGLISH, "M %f,%f L %f,%f", x1, y1, x2, y2)); edgeElem.setAttribute("stroke", svgTarget.toHexString(color)); edgeElem.setAttribute("stroke-width", Float.toString(thickness * svgTarget.getScaleRatio())); edgeElem.setAttribute("stroke-opacity", (color.getAlpha() / 255f) + ""); edgeElem.setAttribute("fill", "none"); svgTarget.getTopElement(SVGTarget.TOP_EDGES).appendChild(edgeElem); } else if (renderTarget instanceof PDFTarget) { PDFTarget pdfTarget = (PDFTarget) renderTarget; PdfContentByte cb = pdfTarget.getContentByte(); cb.moveTo(x1, -y1); cb.lineTo(x2, -y2); cb.setRGBColorStroke(color.getRed(), color.getGreen(), color.getBlue()); cb.setLineWidth(thickness); if (color.getAlpha() < 255) { cb.saveState(); float alpha = color.getAlpha() / 255f; PdfGState gState = new PdfGState(); gState.setStrokeOpacity(alpha); cb.setGState(gState); } cb.stroke(); if (color.getAlpha() < 255) { cb.restoreState(); } } } @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 && properties.getBooleanValue(PreviewProperty.SHOW_EDGES) && !properties.getBooleanValue(PreviewProperty.MOVING)) { return true; } return false; } public String getName() { return NbBundle.getMessage(EdgeRenderer.class, "EdgeRenderer.name"); } }