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.gephi.preview.plugin.renderers; import com.itextpdf.text.pdf.PdfContentByte; import com.itextpdf.text.pdf.PdfGState; import java.awt.Color; import org.gephi.graph.api.Node; import org.gephi.preview.api.*; import org.gephi.preview.plugin.builders.NodeBuilder; import org.gephi.preview.plugin.items.NodeItem; import org.gephi.preview.spi.ItemBuilder; import org.gephi.preview.spi.Renderer; import org.gephi.preview.types.DependantColor; import org.openide.util.NbBundle; import org.openide.util.lookup.ServiceProvider; import org.w3c.dom.Element; import processing.core.PGraphics; /** * * @author Yudi Xue, Mathieu Bastian */ @ServiceProvider(service = Renderer.class, position = 300) public class NodeRenderer implements Renderer { //Default values protected float defaultBorderWidth = 1f; protected DependantColor defaultBorderColor = new DependantColor(Color.BLACK); protected float defaultOpacity = 100f; public void preProcess(PreviewModel previewModel) { } public void render(Item item, RenderTarget target, PreviewProperties properties) { if (target instanceof ProcessingTarget) { renderProcessing(item, (ProcessingTarget) target, properties); } else if (target instanceof SVGTarget) { renderSVG(item, (SVGTarget) target, properties); } else if (target instanceof PDFTarget) { renderPDF(item, (PDFTarget) target, properties); } } public void renderProcessing(Item item, ProcessingTarget target, PreviewProperties properties) { //Params Float x = item.getData(NodeItem.X); Float y = item.getData(NodeItem.Y); Float size = item.getData(NodeItem.SIZE); Color color = item.getData(NodeItem.COLOR); Color borderColor = ((DependantColor) properties.getValue(PreviewProperty.NODE_BORDER_COLOR)) .getColor(color); float borderSize = properties.getFloatValue(PreviewProperty.NODE_BORDER_WIDTH); int alpha = (int) ((properties.getFloatValue(PreviewProperty.NODE_OPACITY) / 100f) * 255f); if (alpha > 255) { alpha = 255; } //Graphics PGraphics graphics = target.getGraphics(); // x = x - size; // y = y - size; if (borderSize > 0) { graphics.stroke(borderColor.getRed(), borderColor.getGreen(), borderColor.getBlue(), alpha); graphics.strokeWeight(borderSize); } else { graphics.noStroke(); } graphics.fill(color.getRed(), color.getGreen(), color.getBlue(), alpha); graphics.ellipse(x, y, size, size); } public void renderSVG(Item item, SVGTarget target, PreviewProperties properties) { Node node = (Node) item.getSource(); //Params Float x = item.getData(NodeItem.X); Float y = item.getData(NodeItem.Y); Float size = item.getData(NodeItem.SIZE); size /= 2f; Color color = item.getData(NodeItem.COLOR); Color borderColor = ((DependantColor) properties.getValue(PreviewProperty.NODE_BORDER_COLOR)) .getColor(color); float borderSize = properties.getFloatValue(PreviewProperty.NODE_BORDER_WIDTH); float alpha = properties.getFloatValue(PreviewProperty.NODE_OPACITY) / 100f; if (alpha > 1) { alpha = 1; } Element nodeElem = target.createElement("circle"); nodeElem.setAttribute("class", node.getNodeData().getId()); nodeElem.setAttribute("cx", x.toString()); nodeElem.setAttribute("cy", y.toString()); nodeElem.setAttribute("r", size.toString()); nodeElem.setAttribute("fill", target.toHexString(color)); nodeElem.setAttribute("fill-opacity", "" + alpha); if (borderSize > 0) { nodeElem.setAttribute("stroke", target.toHexString(borderColor)); nodeElem.setAttribute("stroke-width", new Float(borderSize * target.getScaleRatio()).toString()); nodeElem.setAttribute("stroke-opacity", "" + alpha); } target.getTopElement(SVGTarget.TOP_NODES).appendChild(nodeElem); } public void renderPDF(Item item, PDFTarget target, PreviewProperties properties) { Float x = item.getData(NodeItem.X); Float y = item.getData(NodeItem.Y); Float size = item.getData(NodeItem.SIZE); size /= 2f; Color color = item.getData(NodeItem.COLOR); Color borderColor = ((DependantColor) properties.getValue(PreviewProperty.NODE_BORDER_COLOR)) .getColor(color); float borderSize = properties.getFloatValue(PreviewProperty.NODE_BORDER_WIDTH); float alpha = properties.getFloatValue(PreviewProperty.NODE_OPACITY) / 100f; PdfContentByte cb = target.getContentByte(); cb.setRGBColorStroke(borderColor.getRed(), borderColor.getGreen(), borderColor.getBlue()); cb.setLineWidth(borderSize); cb.setRGBColorFill(color.getRed(), color.getGreen(), color.getBlue()); if (alpha < 1f) { cb.saveState(); PdfGState gState = new PdfGState(); gState.setFillOpacity(alpha); gState.setStrokeOpacity(alpha); cb.setGState(gState); } cb.circle(x, -y, size); if (borderSize > 0) { cb.fillStroke(); } else { cb.fill(); } if (alpha < 1f) { cb.restoreState(); } } public PreviewProperty[] getProperties() { return new PreviewProperty[] { PreviewProperty.createProperty(this, PreviewProperty.NODE_BORDER_WIDTH, Float.class, NbBundle.getMessage(NodeRenderer.class, "NodeRenderer.property.borderWidth.displayName"), NbBundle.getMessage(NodeRenderer.class, "NodeRenderer.property.borderWidth.description"), PreviewProperty.CATEGORY_NODES).setValue(defaultBorderWidth), PreviewProperty.createProperty(this, PreviewProperty.NODE_BORDER_COLOR, DependantColor.class, NbBundle.getMessage(NodeRenderer.class, "NodeRenderer.property.borderColor.displayName"), NbBundle.getMessage(NodeRenderer.class, "NodeRenderer.property.borderColor.description"), PreviewProperty.CATEGORY_NODES).setValue(defaultBorderColor), PreviewProperty.createProperty(this, PreviewProperty.NODE_OPACITY, Float.class, NbBundle.getMessage(NodeRenderer.class, "NodeRenderer.property.opacity.displayName"), NbBundle.getMessage(NodeRenderer.class, "NodeRenderer.property.opacity.description"), PreviewProperty.CATEGORY_NODES).setValue(defaultOpacity) }; } private boolean showNodes(PreviewProperties properties) { return properties.getFloatValue(PreviewProperty.NODE_OPACITY) > 0; } public boolean isRendererForitem(Item item, PreviewProperties properties) { return item instanceof NodeItem && showNodes(properties); } public boolean needsItemBuilder(ItemBuilder itemBuilder, PreviewProperties properties) { return itemBuilder instanceof NodeBuilder && showNodes(properties); } public String getDisplayName() { return NbBundle.getMessage(NodeRenderer.class, "NodeRenderer.name"); } }