Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java @ 1036:e6aff80b59ff
Added proof-of-concept collision detection for text annotations.
flys-artifacts/trunk@2497 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 17 Aug 2011 09:16:20 +0000 |
parents | 9f69a5f0af98 |
children | 75cf1b11c97e |
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package de.intevation.flys.exports; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.apache.log4j.Logger; import java.awt.Shape; import java.awt.geom.Rectangle2D; import org.jfree.chart.annotations.XYLineAnnotation; import org.jfree.chart.annotations.XYTextAnnotation; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.title.TextTitle; import org.jfree.data.Range; import org.jfree.data.xy.XYSeries; import org.jfree.ui.TextAnchor; import org.jfree.chart.plot.PlotRenderingInfo; import org.jfree.text.TextUtilities; import org.jfree.chart.entity.XYAnnotationEntity; import org.jfree.chart.plot.PlotOrientation; import org.jfree.ui.RectangleEdge; import org.jfree.chart.plot.Plot; import org.jfree.chart.ChartRenderingInfo; import org.w3c.dom.Document; import de.intevation.artifacts.Artifact; import de.intevation.artifactdatabase.state.Facet; import de.intevation.flys.artifacts.FLYSArtifact; import de.intevation.flys.artifacts.model.FacetTypes; import de.intevation.flys.artifacts.model.WQKms; import de.intevation.flys.model.Annotation; /** * Custom annotations class that is drawn only if no collisions with other * already drawn CustomAnnotations in current plot are found. */ class CustomAnnotation extends XYTextAnnotation{ /** * Trivial constructor. * * @param text Text to display. * @param x X-position in dataspace (typical horizontal, in km). * @param y Y-position in dataspace (typical vertical, in m). */ public CustomAnnotation(String text, float x, float y) { super(text, x, y); } /** * Draw the Annotiation if it does not collide with other already drawn * Annotations. * * @param g2 the graphics device. * @param plot the plot. * @param dataArea the data area. * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param rendererIndex the render index. * @param info state information, escpecially collects info about * already drawn shapes (and thus annotations), used * for collision detection. */ @Override public void draw( java.awt.Graphics2D g2, XYPlot plot, java.awt.geom.Rectangle2D dataArea, ValueAxis domainAxis, ValueAxis rangeAxis, int rendererIndex, PlotRenderingInfo info) { if (info == null) return; // Calculate bounding box as in super.draw(). // TODO overwrite draw such that even if the annotation gets painted // the bounding box has to be calculated only once. ChartRenderingInfo chartInfo = info.getOwner(); PlotOrientation orientation = plot.getOrientation(); RectangleEdge domainEdge = Plot.resolveDomainAxisLocation( plot.getDomainAxisLocation(), orientation); RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation( plot.getRangeAxisLocation(), orientation); float anchorX = (float) domainAxis.valueToJava2D( getX(), dataArea, domainEdge); float anchorY = (float) rangeAxis.valueToJava2D( getY(), dataArea, rangeEdge); if (orientation == PlotOrientation.HORIZONTAL) { float tempAnchor = anchorX; anchorX = anchorY; anchorY = tempAnchor; } Shape hotspot = TextUtilities.calculateRotatedStringBounds( getText(), g2, anchorX, anchorY, getTextAnchor(), getRotationAngle(), getRotationAnchor()); Rectangle2D hotspotBox = hotspot.getBounds2D(); // Check for collisions with other XYAnnotations. for (Iterator i = chartInfo.getEntityCollection().iterator(); i.hasNext(); ) { Object next = i.next(); // Collision with other stuff than XYAnnotations are okay. if (next instanceof XYAnnotationEntity) { XYAnnotationEntity drawnShape = (XYAnnotationEntity) next; if (drawnShape.getArea().intersects(hotspotBox)) { // Found collision, early stop. return; } } } // Set URL of current annotation. This will let super.draw() add // the relevant info to the PlotRenderingInfo. setURL(""); super.draw(g2, plot, dataArea, domainAxis, rangeAxis, rendererIndex, info); } } /** * An OutGenerator that generates discharge curves. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class LongitudinalSectionGenerator extends XYChartGenerator implements FacetTypes { /** The logger that is used in this generator.*/ private static Logger logger = Logger.getLogger(LongitudinalSectionGenerator.class); public static final String I18N_CHART_TITLE = "chart.longitudinal.section.title"; public static final String I18N_CHART_SUBTITLE = "chart.longitudinal.section.subtitle"; public static final String I18N_XAXIS_LABEL = "chart.longitudinal.section.xaxis.label"; public static final String I18N_YAXIS_LABEL = "chart.longitudinal.section.yaxis.label"; public static final String I18N_2YAXIS_LABEL = "chart.longitudinal.section.yaxis.second.label"; public static final String I18N_CHART_TITLE_DEFAULT = "W-L\u00e4ngsschnitt"; public static final String I18N_XAXIS_LABEL_DEFAULT = "km"; public static final String I18N_YAXIS_LABEL_DEFAULT = "W [NN + m]"; public static final String I18N_2YAXIS_LABEL_DEFAULT = "Q [m\u00b3/s]"; protected boolean inverted; protected List<Annotation> annotations; public LongitudinalSectionGenerator() { super(); annotations = new ArrayList<Annotation>(); } protected String getChartTitle() { return msg(I18N_CHART_TITLE, I18N_CHART_TITLE_DEFAULT); } public boolean isInverted() { return inverted; } public void setInverted(boolean inverted) { this.inverted = inverted; } @Override protected void addSubtitles(JFreeChart chart) { double[] dist = getRange(); Object[] args = new Object[] { getRiverName(), dist[0], dist[1] }; String subtitle = msg(I18N_CHART_SUBTITLE, "", args); chart.addSubtitle(new TextTitle(subtitle)); } @Override public JFreeChart generateChart() { JFreeChart c = super.generateChart(); XYPlot p = (XYPlot) c.getPlot(); redoAnnotations(p, p.getDomainAxis()); return c; } protected String getXAxisLabel() { return msg(I18N_XAXIS_LABEL, I18N_XAXIS_LABEL_DEFAULT); } protected String getYAxisLabel() { return msg(I18N_YAXIS_LABEL, I18N_YAXIS_LABEL_DEFAULT); } protected void adjustAxes(XYPlot plot) { super.adjustAxes(plot); NumberAxis qAxis = new NumberAxis( msg(I18N_2YAXIS_LABEL, I18N_2YAXIS_LABEL_DEFAULT)); plot.setRangeAxis(1, qAxis); invertXAxis(plot.getDomainAxis()); } /** * Remove all annotations from plot and re-insert them at an approximately * okay position. The followed approach is naive but side-effect free. */ protected void redoAnnotations(XYPlot plot, ValueAxis axis) { plot.clearAnnotations(); ValueAxis yAxis = plot.getRangeAxis(); float posY = 140.f; if (yAxis != null) { posY = (float) yAxis.getRange().getLowerBound(); // Lets add some (1%) space between Text and Axis . posY += 0.1f * (yAxis.getRange().getUpperBound() - yAxis.getRange().getLowerBound()); } // Add all annotations. for (Annotation a: annotations) { float posX = (float) a.getRange().getA().doubleValue(); String text = a.getPosition().getValue(); XYTextAnnotation ta = new CustomAnnotation(text, posX, posY); double rotation = 270.0f * (Math.PI / 180.0f); ta.setRotationAngle(rotation); ta.setRotationAnchor(TextAnchor.CENTER_LEFT); ta.setTextAnchor(TextAnchor.CENTER_LEFT); plot.getRenderer().addAnnotation(ta); // TODO Merge XYLineAnnotation and CustomAnnotation. XYLineAnnotation la = new XYLineAnnotation(posX, 0, posX, posY); plot.getRenderer().addAnnotation(la); } } /** * This method overrides the XYChartGenerators zoomY method to include the 0 * value on the Q axis. */ @Override protected boolean zoomY(XYPlot plot, ValueAxis axis, Range range, Range x) { if (plot.getRangeAxisIndex(axis) == 1) { // we want the Q axis to start at 0 if no zooming has been done range = new Range(0d, range.getUpperBound()); } return super.zoomY(plot, axis, range, x); } /** * This method inverts the x-axis based on the kilometer information of the * selected river. If the head of the river is at kilometer 0, the axis is * not inverted, otherwise it is. * * @param xaxis The domain axis. */ protected void invertXAxis(ValueAxis xaxis) { if (inverted) { logger.debug("Invert X-Axis."); xaxis.setInverted(true); } } public void doOut(Artifact artifact, Facet facet, Document attr) { String name = facet.getName(); logger.debug("LongitudinalSectionGenerator.doOut: " + name); if (name == null) { logger.error("No facet name for doOut(). No output generated!"); return; } FLYSArtifact flys = (FLYSArtifact) artifact; Facet f = flys.getNativeFacet(facet); if (f == null) { return; } if (name.equals(LONGITUDINAL_W)) { doWOut((WQKms) f.getData(artifact, context), attr); } else if (name.equals(LONGITUDINAL_Q)) { doQOut((WQKms) f.getData(artifact, context), attr); } else if (name.equals(LONGITUDINAL_ANNOTATION)) { doAnnotationsOut(f.getData(artifact, context), attr); } else { logger.warn("Unknown facet name: " + name); return; } } protected void doAnnotationsOut(Object o, Document theme) { logger.debug("LongitudinalSectionGenerator.doAnnotationsOut"); this.annotations = (List<Annotation>) o; } /** * Process the output for W facets in a longitudinal section curve. * * @param wqkms An array of WQKms values. * @param theme The theme that contains styling information. */ protected void doWOut(WQKms wqkms, Document theme) { logger.debug("LongitudinalSectionGenerator.doWOut"); XYSeries series = new StyledXYSeries(getSeriesName(wqkms, "W"), theme); int size = wqkms.size(); if (logger.isDebugEnabled()) { if (wqkms.size() > 0) { logger.debug("Generate series: " + series.getKey()); logger.debug("Start km: " + wqkms.getKm(0)); logger.debug("End km: " + wqkms.getKm(size-1)); logger.debug("Values : " + size); } } for (int i = 0; i < size; i++) { series.add(wqkms.getKm(i), wqkms.getW(i)); } addFirstAxisSeries(series); if (wqkms.guessWaterIncreasing()) { setInverted(true); } } /** * Process the output for Q facets in a longitudinal section curve. * * @param wqkms An array of WQKms values. * @param theme The theme that contains styling information. */ protected void doQOut(WQKms wqkms, Document theme) { logger.debug("LongitudinalSectionGenerator.doQOut"); XYSeries series = new StyledXYSeries(getSeriesName(wqkms, "Q"), theme); int size = wqkms.size(); if (logger.isDebugEnabled()) { if (wqkms.size() > 0) { logger.debug("Generate series: " + series.getKey()); logger.debug("Start km: " + wqkms.getKm(0)); logger.debug("End km: " + wqkms.getKm(size-1)); logger.debug("Values : " + size); } } for (int i = 0; i < size; i++) { series.add(wqkms.getKm(i), wqkms.getQ(i)); } addSecondAxisSeries(series); if (wqkms.guessWaterIncreasing()) { setInverted(true); } } protected String getSeriesName(WQKms wqkms, String mode) { String name = wqkms.getName(); String prefix = name != null && name.indexOf(mode) >= 0 ? null : mode; return prefix != null && prefix.length() > 0 ? prefix + "(" + name +")" : name; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :