List of usage examples for org.jfree.data.xy XYDataset getItemCount
public int getItemCount(int series);
From source file:com.intel.stl.ui.common.view.ComponentFactory.java
public static JFreeChart createStepAreaChart(XYDataset dataset, XYItemLabelGenerator labelGenerator) { if (dataset == null) { throw new IllegalArgumentException("No dataset."); }// w w w . j av a2 s . co m JFreeChart jfreechart = ChartFactory.createXYLineChart(null, null, null, dataset, PlotOrientation.VERTICAL, false, true, false); XYPlot xyplot = (XYPlot) jfreechart.getPlot(); xyplot.setBackgroundPaint(UIConstants.INTEL_BACKGROUND_GRAY); // xyplot.setOutlinePaint(null); XYStepAreaRenderer xysteparearenderer = new XYStepAreaRenderer(XYStepAreaRenderer.AREA) { @Override public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item, CrosshairState crosshairState, int pass) { setShapesVisible(item == dataset.getItemCount(series) - 1); super.drawItem(g2, state, dataArea, info, plot, domainAxis, rangeAxis, dataset, series, item, crosshairState, pass); } }; xysteparearenderer.setDataBoundsIncludesVisibleSeriesOnly(false); xysteparearenderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator()); xysteparearenderer.setDefaultEntityRadius(6); xysteparearenderer.setShapesFilled(true); xyplot.setRenderer(xysteparearenderer); if (labelGenerator != null) { xysteparearenderer.setBaseItemLabelGenerator(labelGenerator); } xysteparearenderer.setSeriesPaint(0, UIConstants.INTEL_GREEN); xyplot.setOutlinePaint(UIConstants.INTEL_DARK_GRAY); xyplot.setDomainGridlinePaint(UIConstants.INTEL_DARK_GRAY); xyplot.setRangeGridlinePaint(UIConstants.INTEL_DARK_GRAY); xyplot.getDomainAxis().setVisible(false); NumberAxis axis = (NumberAxis) xyplot.getRangeAxis(); axis.setRangeType(RangeType.POSITIVE); axis.setAxisLineVisible(false); return jfreechart; }
From source file:de.hdm.uls.loadtests.ui.XYLineAndAreaRenderer.java
/** * Draws the visual representation of a single data item. * * @param g2 the graphics device./*from w w w. ja va 2 s.c om*/ * @param state the renderer state. * @param dataArea the area within which the data is being drawn. * @param info collects information about the drawing. * @param plot the plot (can be used to obtain standard color information * etc). * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param dataset the dataset. * @param series the series index (zero-based). * @param item the item index (zero-based). * @param crosshairState crosshair information for the plot * (<code>null</code> permitted). * @param pass the pass index. */ public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item, CrosshairState crosshairState, int pass) { if (!getItemVisible(series, item)) { return; } XYAreaRendererState areaState = (XYAreaRendererState) state; // get the data point... double x1 = dataset.getXValue(series, item); double y1 = dataset.getYValue(series, item); if (Double.isNaN(y1)) { y1 = 0.0; } double transX1 = domainAxis.valueToJava2D(x1, dataArea, plot.getDomainAxisEdge()); double transY1 = rangeAxis.valueToJava2D(y1, dataArea, plot.getRangeAxisEdge()); // get the previous point and the next point so we can calculate a // "hot spot" for the area (used by the chart entity)... int itemCount = dataset.getItemCount(series); double x0 = dataset.getXValue(series, Math.max(item - 1, 0)); double y0 = dataset.getYValue(series, Math.max(item - 1, 0)); if (Double.isNaN(y0)) { y0 = 0.0; } double transX0 = domainAxis.valueToJava2D(x0, dataArea, plot.getDomainAxisEdge()); double transY0 = rangeAxis.valueToJava2D(y0, dataArea, plot.getRangeAxisEdge()); double x2 = dataset.getXValue(series, Math.min(item + 1, itemCount - 1)); double y2 = dataset.getYValue(series, Math.min(item + 1, itemCount - 1)); if (Double.isNaN(y2)) { y2 = 0.0; } double transX2 = domainAxis.valueToJava2D(x2, dataArea, plot.getDomainAxisEdge()); double transY2 = rangeAxis.valueToJava2D(y2, dataArea, plot.getRangeAxisEdge()); double transZero = rangeAxis.valueToJava2D(0.0, dataArea, plot.getRangeAxisEdge()); Polygon hotspot = null; if (plot.getOrientation() == PlotOrientation.HORIZONTAL) { hotspot = new Polygon(); hotspot.addPoint((int) transZero, (int) ((transX0 + transX1) / 2.0)); hotspot.addPoint((int) ((transY0 + transY1) / 2.0), (int) ((transX0 + transX1) / 2.0)); hotspot.addPoint((int) transY1, (int) transX1); hotspot.addPoint((int) ((transY1 + transY2) / 2.0), (int) ((transX1 + transX2) / 2.0)); hotspot.addPoint((int) transZero, (int) ((transX1 + transX2) / 2.0)); } else { // vertical orientation hotspot = new Polygon(); hotspot.addPoint((int) ((transX0 + transX1) / 2.0), (int) transZero); hotspot.addPoint((int) ((transX0 + transX1) / 2.0), (int) ((transY0 + transY1) / 2.0)); hotspot.addPoint((int) transX1, (int) transY1); hotspot.addPoint((int) ((transX1 + transX2) / 2.0), (int) ((transY1 + transY2) / 2.0)); hotspot.addPoint((int) ((transX1 + transX2) / 2.0), (int) transZero); } if (item == 0) { // create a new area polygon for the series areaState.area = new Polygon(); // the first point is (x, 0) double zero = rangeAxis.valueToJava2D(0.0, dataArea, plot.getRangeAxisEdge()); if (plot.getOrientation() == PlotOrientation.VERTICAL) { areaState.area.addPoint((int) transX1, (int) zero); } else if (plot.getOrientation() == PlotOrientation.HORIZONTAL) { areaState.area.addPoint((int) zero, (int) transX1); } } // Add each point to Area (x, y) if (plot.getOrientation() == PlotOrientation.VERTICAL) { areaState.area.addPoint((int) transX1, (int) transY1); } else if (plot.getOrientation() == PlotOrientation.HORIZONTAL) { areaState.area.addPoint((int) transY1, (int) transX1); } PlotOrientation orientation = plot.getOrientation(); Paint paint = getItemPaint(series, item); Stroke stroke = getItemStroke(series, item); g2.setPaint(paint); g2.setStroke(stroke); Shape shape = null; if (getPlotShapes()) { shape = getItemShape(series, item); if (orientation == PlotOrientation.VERTICAL) { shape = ShapeUtilities.createTranslatedShape(shape, transX1, transY1); } else if (orientation == PlotOrientation.HORIZONTAL) { shape = ShapeUtilities.createTranslatedShape(shape, transY1, transX1); } g2.draw(shape); } if (getPlotLines()) { if (item > 0) { if (plot.getOrientation() == PlotOrientation.VERTICAL) { areaState.line.setLine(transX0, transY0, transX1, transY1); } else if (plot.getOrientation() == PlotOrientation.HORIZONTAL) { areaState.line.setLine(transY0, transX0, transY1, transX1); } g2.draw(areaState.line); } } // Check if the item is the last item for the series. // and number of items > 0. We can't draw an area for a single point. if (getPlotArea() && item > 0 && item == (itemCount - 1)) { if (orientation == PlotOrientation.VERTICAL) { // Add the last point (x,0) areaState.area.addPoint((int) transX1, (int) transZero); } else if (orientation == PlotOrientation.HORIZONTAL) { // Add the last point (x,0) areaState.area.addPoint((int) transZero, (int) transX1); } Paint fillPaint = getItemFillPaint(series, item); if (fillPaint instanceof GradientPaint) { GradientPaint gp = (GradientPaint) fillPaint; GradientPaintTransformer t = new StandardGradientPaintTransformer(); fillPaint = t.transform(gp, areaState.area.getBounds()); } g2.setPaint(fillPaint); g2.fill(areaState.area); // draw an outline around the Area. if (isOutline()) { g2.setStroke(getItemOutlineStroke(series, item)); g2.setPaint(getItemOutlinePaint(series, item)); g2.draw(areaState.area); } } updateCrosshairValues(crosshairState, x1, y1, transX1, transY1, orientation); // collect entity and tool tip information... if (state.getInfo() != null) { EntityCollection entities = state.getEntityCollection(); if (entities != null && hotspot != null) { String tip = null; XYToolTipGenerator generator = getToolTipGenerator(series, item); if (generator != null) { tip = generator.generateToolTip(dataset, series, item); } String url = null; if (getURLGenerator() != null) { url = getURLGenerator().generateURL(dataset, series, item); } XYItemEntity entity = new XYItemEntity(hotspot, dataset, series, item, tip, url); entities.add(entity); } } }
From source file:no.met.jtimeseries.chart.ChartPlotter.java
/** Add max min bar. Mainly used to show precipitation that has max and min values * @param timeBase//ww w .j av a2 s.co m * @param title * @param maxMinTimeSeriesEnabler * @param maxColor * @param minColor */ public void addMaxMinPercipitationBars(TimeBase timeBase, String title, NumberPhenomenon max, NumberPhenomenon min, Color maxColor, Color minColor) { XYDataset maxDataset = max.getTimeSeries(title, timeBase); XYDataset minDataset = min.getTimeSeries(title, timeBase); if (maxDataset.getSeriesCount() > 0 && minDataset.getSeriesCount() > 0 && maxDataset.getItemCount(0) > 0 && minDataset.getItemCount(0) > 0) { double margin = 0.2; double maxPrecipitation = max.getMaxValue(); addBarChart(minDataset, "min", minColor, margin, maxPrecipitation); showBarValuesOnBottom(plotIndex - 1, 1D); rangeAxisIndex--; addBarChart(maxDataset, "max", maxColor, margin, maxPrecipitation); showBarValuesOnTop(plotIndex - 1, 6D); plot.getRangeAxis(getRangeAxisIndex() - 1).setVisible(false); final Marker marker = new ValueMarker(0); marker.setPaint(Color.GRAY); marker.setStroke(new BasicStroke(1)); plot.addRangeMarker(getRangeAxisIndex() - 1, marker, Layer.BACKGROUND); } }
From source file:umontreal.iro.lecuyer.charts.EmpiricalRenderer.java
/** * Draws the visual representation of a single data item. * * @param g2 the graphics device. * @param state the renderer state. * @param dataArea the area within which the data is being drawn. * @param info collects information about the drawing. * @param plot the plot (can be used to obtain standard color * information etc). * @param domainAxis the domain axis.// www.j a v a 2 s . co m * @param rangeAxis the range axis. * @param dataset the dataset. * @param series the series index (zero-based). * @param item the item index (zero-based). * @param crosshairState crosshair information for the plot * (<code>null</code> permitted). * @param pass the pass index. */ public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item, CrosshairState crosshairState, int pass) { if (!getItemVisible(series, item)) return; PlotOrientation orientation = plot.getOrientation(); java.awt.Paint seriesPaint = getItemPaint(series, item); java.awt.Stroke seriesStroke = getItemStroke(series, item); g2.setPaint(seriesPaint); g2.setStroke(seriesStroke); double x0 = dataset.getXValue(series, item); double y0 = dataset.getYValue(series, item); if (java.lang.Double.isNaN(y0)) return; org.jfree.ui.RectangleEdge xAxisLocation = plot.getDomainAxisEdge(); org.jfree.ui.RectangleEdge yAxisLocation = plot.getRangeAxisEdge(); double transX0 = domainAxis.valueToJava2D(x0, dataArea, xAxisLocation); double transY0 = rangeAxis.valueToJava2D(y0, dataArea, yAxisLocation); double x1 = 0, y1 = 0; if (item < dataset.getItemCount(series) - 1) { x1 = dataset.getXValue(series, item + 1); y1 = dataset.getYValue(series, item + 1); } else { x1 = dataArea.getMaxX(); y1 = dataArea.getMaxY(); } boolean useFillPaint = getUseFillPaint(); ; boolean drawOutlines = getDrawOutlines(); if (!java.lang.Double.isNaN(y0)) { double transX1; double transY1; if (item < dataset.getItemCount(series) - 1) { transX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation); transY1 = rangeAxis.valueToJava2D(y1, dataArea, yAxisLocation); } else { transX1 = x1; transY1 = y1; } Line2D line = state.workingLine; if (orientation == PlotOrientation.HORIZONTAL) { line.setLine(transY0, transX0, transY0, transX1); g2.draw(line); } else if (orientation == PlotOrientation.VERTICAL) { line.setLine(transX0, transY0, transX1, transY0); g2.draw(line); } } if (getItemShapeVisible(series, item)) { Shape shape = getItemShape(series, item); if (orientation == PlotOrientation.HORIZONTAL) shape = ShapeUtilities.createTranslatedShape(shape, transY0, transX0); else if (orientation == PlotOrientation.VERTICAL) shape = ShapeUtilities.createTranslatedShape(shape, transX0, transY0); if (shape.intersects(dataArea)) { if (getItemShapeFilled(series, item)) { if (useFillPaint) g2.setPaint(getItemFillPaint(series, item)); else g2.setPaint(getItemPaint(series, item)); g2.fill(shape); } if (drawOutlines) { if (getUseOutlinePaint()) g2.setPaint(getItemOutlinePaint(series, item)); else g2.setPaint(getItemPaint(series, item)); g2.setStroke(getItemOutlineStroke(series, item)); g2.draw(shape); } } } if (isItemLabelVisible(series, item)) { double xx = transX0; double yy = transY0; if (orientation == PlotOrientation.HORIZONTAL) { xx = transY0; yy = transX0; } drawItemLabel(g2, orientation, dataset, series, item, xx, yy, y0 < 0.0D); } int domainAxisIndex = plot.getDomainAxisIndex(domainAxis); int rangeAxisIndex = plot.getRangeAxisIndex(rangeAxis); updateCrosshairValues(crosshairState, x0, y0, domainAxisIndex, rangeAxisIndex, transX0, transY0, orientation); if (state.getInfo() != null) { EntityCollection entities = state.getEntityCollection(); if (entities != null) { int r = getDefaultEntityRadius(); java.awt.Shape shape = orientation != PlotOrientation.VERTICAL ? ((java.awt.Shape) (new java.awt.geom.Rectangle2D.Double(transY0 - (double) r, transX0 - (double) r, 2 * r, 2 * r))) : ((java.awt.Shape) (new java.awt.geom.Rectangle2D.Double(transX0 - (double) r, transY0 - (double) r, 2 * r, 2 * r))); if (shape != null) { String tip = null; XYToolTipGenerator generator = getToolTipGenerator(series, item); if (generator != null) tip = generator.generateToolTip(dataset, series, item); String url = null; if (getURLGenerator() != null) url = getURLGenerator().generateURL(dataset, series, item); XYItemEntity entity = new XYItemEntity(shape, dataset, series, item, tip, url); entities.add(entity); } } } }
From source file:windows.sensorWindow.java
/** * collects values from the selection and copies them into the templatePlot * object// ww w . ja v a 2s . c om * * @param x1 * @param x2 * @param dataSet */ public static void collectPlotValues(double x1, double x2, XYDataset dataSet) { Comparable comparable; int indexOf; ArrayList<MeasurementEntry> entries = new ArrayList<MeasurementEntry>(); if (dataSet != null) { int k = dataSet.getSeriesCount(); for (int i = 0; i < dataSet.getSeriesCount(); i++) { comparable = dataSet.getSeriesKey(i); indexOf = dataSet.indexOf(comparable); for (int j = 0; j < dataSet.getItemCount(indexOf); j++) { long x = (long) dataSet.getXValue(indexOf, j); if (x >= x1) { double y = dataSet.getYValue(indexOf, j); // System.out.println("valueX["+j+"] = "+functions.Common.doubleToTime(x)+", y = "+y); entries.add(new MeasurementEntry(x, y)); } if (x >= x2) { break; } } } } templatePlot.replacePointList(entries); }
From source file:se.technipelago.weather.chart.Generator.java
private JFreeChart createLineChart(final String title, final String valueLabel, final XYDataset dataset) { final JFreeChart chart = ChartFactory.createTimeSeriesChart(title, null, valueLabel, dataset, false, false, false);/* w w w. ja v a 2s . co m*/ if (dataset.getItemCount(0) < 30) { final XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(); final XYPlot plot = (XYPlot) chart.getPlot(); plot.setRenderer(renderer); } return chart; }
From source file:org.operamasks.faces.render.graph.ChartRenderer.java
private XYSeries createCurveSeries(UICurve curve, XYDataset data, int index) { if (data.getItemCount(index) < 2) { throw new IllegalArgumentException("Not enough data"); }// w w w . ja v a 2 s . c o m Key key = new Key(index, curve.getLegend()); if (curve instanceof UIAverageLine) { double period = ((UIAverageLine) curve).getPeriod(); double skip = ((UIAverageLine) curve).getSkip(); if (data instanceof TimeSeriesCollection) { TimeSeries ts = ((TimeSeriesCollection) data).getSeries(index); return MovingAverage.createMovingAverage(ts, key, (int) period, (int) skip); } else { return MovingAverage.createMovingAverage(data, index, key, period, skip); } } else if (curve instanceof UIRegressionLine) { RegressionType type = ((UIRegressionLine) curve).getType(); int samples = ((UIRegressionLine) curve).getSamples(); if (type == null || type == RegressionType.Linear) { double[] p = Regression.getOLSRegression(data, index); Function2D f = new LineFunction2D(p[0], p[1]); return createFunctionSeries(data, index, key, f, samples); } else if (type == RegressionType.Power) { double[] p = Regression.getPowerRegression(data, index); Function2D f = new PowerFunction2D(p[0], p[1]); return createFunctionSeries(data, index, key, f, samples); } else { throw new IllegalArgumentException(type.toString()); } } else if (curve instanceof UISpline) { SplineType type = ((UISpline) curve).getType(); int samples = ((UISpline) curve).getSamples(); int degree = ((UISpline) curve).getDegree(); if (type == null || type == SplineType.BSpline) { return BSpline.createBSpline(data, index, key, samples, degree); } else if (type == SplineType.CubicSpline) { return CubicSpline.createCubicSpline(data, index, key, samples); } } return null; }
From source file:org.jfree.data.general.DatasetUtilities.java
/** * Returns <code>true</code> if the dataset is empty (or <code>null</code>), * and <code>false</code> otherwise. * * @param dataset the dataset (<code>null</code> permitted). * * @return A boolean.//from ww w.j ava 2 s . c o m */ public static boolean isEmptyOrNull(XYDataset dataset) { if (dataset != null) { for (int s = 0; s < dataset.getSeriesCount(); s++) { if (dataset.getItemCount(s) > 0) { return false; } } } return true; }
From source file:de.laures.cewolf.jfree.XYSplineRenderer.java
/** * Draws the item (first pass). This method draws the lines * connecting the items. Instead of drawing separate lines, * a GeneralPath is constructed and drawn at the end of the series painting. * * @param g2 the graphics device./*from w ww . j a v a 2s . c o m*/ * @param state the renderer state. * @param plot the plot (can be used to obtain standard color information etc). * @param dataset the dataset. * @param pass the pass. * @param series the series index (zero-based). * @param item the item index (zero-based). * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param dataArea the area within which the data is being drawn. */ protected void drawPrimaryLineAsPath(XYItemRendererState state, Graphics2D g2, XYPlot plot, XYDataset dataset, int pass, int series, int item, ValueAxis domainAxis, ValueAxis rangeAxis, Rectangle2D dataArea) { RectangleEdge xAxisLocation = plot.getDomainAxisEdge(); RectangleEdge yAxisLocation = plot.getRangeAxisEdge(); // get the data points double x1 = dataset.getXValue(series, item); double y1 = dataset.getYValue(series, item); double transX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation); double transY1 = rangeAxis.valueToJava2D(y1, dataArea, yAxisLocation); // collect points if (!Double.isNaN(transX1) && !Double.isNaN(transY1)) { ControlPoint p = new ControlPoint( plot.getOrientation() == PlotOrientation.HORIZONTAL ? (float) transY1 : (float) transX1, plot.getOrientation() == PlotOrientation.HORIZONTAL ? (float) transX1 : (float) transY1); if (!this.points.contains(p)) { this.points.add(p); } } if (item == dataset.getItemCount(series) - 1) { State s = (State) state; // construct path if (this.points.size() > 1) { // we need at least two points to draw something ControlPoint cp0 = (ControlPoint) this.points.get(0); s.seriesPath.moveTo(cp0.x, cp0.y); if (this.points.size() == 2) { // we need at least 3 points to spline. Draw simple line for two points ControlPoint cp1 = (ControlPoint) this.points.get(1); s.seriesPath.lineTo(cp1.x, cp1.y); } else { // construct spline int np = this.points.size(); // number of points float[] d = new float[np]; // Newton form coefficients float[] x = new float[np]; // x-coordinates of nodes float y; float t; float[] a = new float[np]; float t1; float t2; float[] h = new float[np]; for (int i = 0; i < np; i++) { ControlPoint cpi = (ControlPoint) this.points.get(i); x[i] = cpi.x; d[i] = cpi.y; } for (int i = 1; i <= np - 1; i++) { h[i] = x[i] - x[i - 1]; } float[] sub = new float[np - 1]; float[] diag = new float[np - 1]; float[] sup = new float[np - 1]; for (int i = 1; i <= np - 2; i++) { diag[i] = (h[i] + h[i + 1]) / 3; sup[i] = h[i + 1] / 6; sub[i] = h[i] / 6; a[i] = (d[i + 1] - d[i]) / h[i + 1] - (d[i] - d[i - 1]) / h[i]; } solveTridiag(sub, diag, sup, a, np - 2); // note that a[0]=a[np-1]=0 // draw s.seriesPath.moveTo(x[0], d[0]); for (int i = 1; i <= np - 1; i++) { // loop over intervals between nodes for (int j = 1; j <= this.precision; j++) { t1 = (h[i] * j) / this.precision; t2 = h[i] - t1; y = ((-a[i - 1] / 6 * (t2 + h[i]) * t1 + d[i - 1]) * t2 + (-a[i] / 6 * (t1 + h[i]) * t2 + d[i]) * t1) / h[i]; t = x[i - 1] + t1; s.seriesPath.lineTo(t, y); } } } // draw path drawFirstPassShape(g2, pass, series, item, s.seriesPath); } // reset points vector this.points = new Vector(); } }
From source file:no.met.jtimeseries.chart.XYSplineRenderer.java
/** * Draws the item (first pass). This method draws the lines * connecting the items. Instead of drawing separate lines, * a GeneralPath is constructed and drawn at the end of * the series painting./* w w w . j a v a2 s . c o m*/ * * @param g2 the graphics device. * @param state the renderer state. * @param plot the plot (can be used to obtain standard color information * etc). * @param dataset the dataset. * @param pass the pass. * @param series the series index (zero-based). * @param item the item index (zero-based). * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param dataArea the area within which the data is being drawn. */ @Override protected void drawPrimaryLineAsPath(XYItemRendererState state, Graphics2D g2, XYPlot plot, XYDataset dataset, int pass, int series, int item, ValueAxis domainAxis, ValueAxis rangeAxis, Rectangle2D dataArea) { RectangleEdge xAxisLocation = plot.getDomainAxisEdge(); RectangleEdge yAxisLocation = plot.getRangeAxisEdge(); // get the data points double x1 = dataset.getXValue(series, item); double y1 = dataset.getYValue(series, item); double transX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation); double transY1 = rangeAxis.valueToJava2D(y1, dataArea, yAxisLocation); // collect points if (!Double.isNaN(transX1) && !Double.isNaN(transY1)) { ControlPoint p = new ControlPoint( plot.getOrientation() == PlotOrientation.HORIZONTAL ? (float) transY1 : (float) transX1, plot.getOrientation() == PlotOrientation.HORIZONTAL ? (float) transX1 : (float) transY1); if (!this.points.contains(p)) { this.points.add(p); } } if (item == dataset.getItemCount(series) - 1) { State s = (State) state; // construct path if (this.points.size() > 1) { // we need at least two points to draw something ControlPoint cp0 = this.points.get(0); s.seriesPath.moveTo(cp0.x, cp0.y); if (this.points.size() == 2) { // we need at least 3 points to spline. Draw simple line // for two points ControlPoint cp1 = this.points.get(1); s.seriesPath.lineTo(cp1.x, cp1.y); } else { // construct spline int np = this.points.size(); // number of points float[] d = new float[np]; // Newton form coefficients float[] x = new float[np]; // x-coordinates of nodes float y; float t; float oldy = 0; float oldt = 0; float[] a = new float[np]; float t1; float t2; float[] h = new float[np]; for (int i = 0; i < np; i++) { ControlPoint cpi = this.points.get(i); x[i] = cpi.x; d[i] = cpi.y; } for (int i = 1; i <= np - 1; i++) { h[i] = x[i] - x[i - 1]; } float[] sub = new float[np - 1]; float[] diag = new float[np - 1]; float[] sup = new float[np - 1]; for (int i = 1; i <= np - 2; i++) { diag[i] = (h[i] + h[i + 1]) / 3; sup[i] = h[i + 1] / 6; sub[i] = h[i] / 6; a[i] = (d[i + 1] - d[i]) / h[i + 1] - (d[i] - d[i - 1]) / h[i]; } solveTridiag(sub, diag, sup, a, np - 2); // note that a[0]=a[np-1]=0 // draw oldt = x[0]; oldy = d[0]; s.seriesPath.moveTo(oldt, oldy); for (int i = 1; i <= np - 1; i++) { // loop over intervals between nodes for (int j = 1; j <= this.precision; j++) { t1 = (h[i] * j) / this.precision; t2 = h[i] - t1; y = ((-a[i - 1] / 6 * (t2 + h[i]) * t1 + d[i - 1]) * t2 + (-a[i] / 6 * (t1 + h[i]) * t2 + d[i]) * t1) / h[i]; t = x[i - 1] + t1; s.seriesPath.lineTo(t, y); oldt = t; oldy = y; } } } // draw path drawFirstPassShape(g2, pass, series, item, s.seriesPath); } // reset points vector this.points = new Vector<ControlPoint>(); } }