Java tutorial
/* * Copyright (C) 2009 Camptocamp * * This file is part of MapFish Server * * MapFish Server is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * MapFish Server is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with MapFish Server. If not, see <http://www.gnu.org/licenses/>. */ package org.mapfish.print.map.renderers.vector; import com.vividsolutions.jts.geom.Point; import com.vividsolutions.jts.geom.Coordinate; import com.lowagie.text.pdf.BaseFont; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfGState; import com.lowagie.text.BadElementException; import com.lowagie.text.Image; import com.lowagie.text.DocumentException; import org.mapfish.print.RenderingContext; import org.mapfish.print.PDFUtils; import org.mapfish.print.InvalidValueException; import org.mapfish.print.config.ColorWrapper; import org.mapfish.print.utils.PJsonObject; import java.net.URI; import java.net.URISyntaxException; import java.util.Map; import java.util.HashMap; /** * Render point geometries. Support for the 3 OL stylings: * <ol> * <li>externalGraphic * <li>graphicName * <li>circle * </ol> */ public class PointRenderer extends GeometriesRenderer<Point> { private static final Map<String, float[]> SYMBOLS = new HashMap<String, float[]>(); static { SYMBOLS.put("star", normalizeSymbol(new float[] { 350, 75, 379, 161, 469, 161, 397, 215, 423, 301, 350, 250, 277, 301, 303, 215, 231, 161, 321, 161, 350, 75 })); SYMBOLS.put("cross", normalizeSymbol( new float[] { 4, 0, 6, 0, 6, 4, 10, 4, 10, 6, 6, 6, 6, 10, 4, 10, 4, 6, 0, 6, 0, 4, 4, 4, 4, 0 })); SYMBOLS.put("x", normalizeSymbol(new float[] { 0, 0, 25, 0, 50, 35, 75, 0, 100, 0, 65, 50, 100, 100, 75, 100, 50, 65, 25, 100, 0, 100, 35, 50, 0, 0 })); SYMBOLS.put("square", normalizeSymbol(new float[] { 0, 0, 0, 1, 1, 1, 1, 0, 0, 0 })); SYMBOLS.put("triangle", normalizeSymbol(new float[] { 0, 10, 10, 10, 5, 0, 0, 10 })); } private static float[] normalizeSymbol(float[] coords) { float minX = Float.MAX_VALUE; float maxX = -Float.MAX_VALUE; float minY = Float.MAX_VALUE; float maxY = -Float.MAX_VALUE; for (int i = 0; i < coords.length; i += 2) { float x = coords[i]; float y = coords[i + 1]; minX = Math.min(minX, x); maxX = Math.max(maxX, x); minY = Math.min(minY, y); maxY = Math.max(maxY, y); } float width = maxX - minX; float height = maxY - minY; for (int i = 0; i < coords.length; i += 2) { coords[i] = (coords[i] - minX) / width; coords[i + 1] = (coords[i + 1] - minY) / height; } return coords; } protected void renderImpl(RenderingContext context, PdfContentByte dc, PJsonObject style, Point geometry) { PdfGState state = new PdfGState(); final Coordinate coordinate = geometry.getCoordinate(); float pointRadius = style.optFloat("pointRadius", 4.0f); final float f = context.getStyleFactor(); String graphicName = style.optString("graphicName"); float width = style.optFloat("graphicWidth", pointRadius * 2.0f); float height = style.optFloat("graphicHeight", pointRadius * 2.0f); float offsetX = style.optFloat("graphicXOffset", -width / 2.0f); float offsetY = style.optFloat("graphicYOffset", -height / 2.0f); // See Feature/Vector.js for more information about labels String label = style.optString("label"); String labelAlign = style.optString("labelAlign", "lb"); /* * Valid values for horizontal alignment: "l"=left, "c"=center, "r"=right. * Valid values for vertical alignment: "t"=top, "m"=middle, "b"=bottom. */ float labelXOffset = style.optFloat("labelXOffset", (float) 0.0); float labelYOffset = style.optFloat("labelYOffset", (float) 0.0); String fontColor = style.optString("fontColor", "#000000"); /* Supported itext fonts: COURIER, HELVETICA, TIMES_ROMAN */ String fontFamily = style.optString("fontFamily", "HELVETICA"); String fontSize = style.optString("fontSize", "12"); String fontWeight = style.optString("fontWeight", "normal"); if (style.optString("externalGraphic") != null) { float opacity = style.optFloat("graphicOpacity", style.optFloat("fillOpacity", 1.0f)); state.setFillOpacity(opacity); state.setStrokeOpacity(opacity); dc.setGState(state); try { Image image = PDFUtils.createImage(context, width * f, height * f, new URI(style.getString("externalGraphic")), 0.0f); image.setAbsolutePosition((float) coordinate.x + offsetX * f, (float) coordinate.y + offsetY * f); dc.addImage(image); } catch (BadElementException e) { context.addError(e); } catch (URISyntaxException e) { context.addError(e); } catch (DocumentException e) { context.addError(e); } } else if (graphicName != null && !graphicName.equalsIgnoreCase("circle")) { PolygonRenderer.applyStyle(context, dc, style, state); float[] symbol = SYMBOLS.get(graphicName); if (symbol == null) { throw new InvalidValueException("graphicName", graphicName); } dc.setGState(state); dc.moveTo((float) coordinate.x + symbol[0] * width * f + offsetX * f, (float) coordinate.y + symbol[1] * height * f + offsetY * f); for (int i = 2; i < symbol.length - 2; i += 2) { dc.lineTo((float) coordinate.x + symbol[i] * width * f + offsetX * f, (float) coordinate.y + symbol[i + 1] * height * f + offsetY * f); } dc.closePath(); dc.fillStroke(); } else if (label != null && label.length() > 0) { BaseFont bf = PDFUtils.getBaseFont(fontFamily, fontSize, fontWeight); float fontHeight = (float) Double.parseDouble(fontSize.toLowerCase().replaceAll("px", "")) * f; dc.setFontAndSize(bf, fontHeight); dc.setColorFill(ColorWrapper.convertColor(fontColor)); state.setFillOpacity((float) 1.0); dc.setGState(state); dc.beginText(); dc.setTextMatrix((float) coordinate.x + labelXOffset * f, (float) coordinate.y + labelYOffset * f); dc.setGState(state); dc.showTextAligned(PDFUtils.getHorizontalAlignment(labelAlign), label, (float) coordinate.x + labelXOffset * f, (float) coordinate.y + labelYOffset * f - PDFUtils.getVerticalOffset(labelAlign, fontHeight), 0); dc.endText(); } else { PolygonRenderer.applyStyle(context, dc, style, state); dc.setGState(state); dc.circle((float) coordinate.x, (float) coordinate.y, pointRadius * f); dc.fillStroke(); } } }