Java ValueAxis類代碼示例

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Tests the the lower and upper margin settings produce the expected results.
 */
public void testAxisMargins() {
    XYSeries series = new XYSeries("S1");
    series.add(100.0, 1.1);
    series.add(200.0, 2.2);
    XYSeriesCollection dataset = new XYSeriesCollection(series);
    dataset.setIntervalWidth(0.0);
    JFreeChart chart = ChartFactory.createScatterPlot(
        "Title", "X", "Y", dataset, PlotOrientation.VERTICAL, false, false, false
    );
    ValueAxis domainAxis = chart.getXYPlot().getDomainAxis();
    Range r = domainAxis.getRange();
    assertTrue(NumberUtils.equal(110.0, r.getLength()));
    domainAxis.setLowerMargin(0.10);
    domainAxis.setUpperMargin(0.10);
    r = domainAxis.getRange();
    assertTrue(NumberUtils.equal(120.0, r.getLength()));
}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Draws the bar for one item in the dataset.
 *
 * @param g2  the graphics device.
 * @param state  the renderer state.
 * @param dataArea  the plot area.
 * @param plot  the plot.
 * @param domainAxis  the domain (category) axis.
 * @param rangeAxis  the range (value) axis.
 * @param data  the data.
 * @param row  the row index (zero-based).
 * @param column  the column index (zero-based).
 * @param pass  the pass index.
 */
public void drawItem(Graphics2D g2,
                     CategoryItemRendererState state,
                     Rectangle2D dataArea,
                     CategoryPlot plot,
                     CategoryAxis domainAxis,
                     ValueAxis rangeAxis,
                     CategoryDataset data,
                     int row,
                     int column,
                     int pass) {

    PlotOrientation orientation = plot.getOrientation();
    if (orientation == PlotOrientation.HORIZONTAL) {
        drawHorizontalItem(g2, state, dataArea, plot, domainAxis, rangeAxis, 
            data, row, column);
    }
    else if (orientation == PlotOrientation.VERTICAL) {
        drawVerticalItem(g2, state, dataArea, plot, domainAxis, rangeAxis, 
            data, row, column);
    }

}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Receives notification of a change to the plot's dataset.
 * <P>
 * The range axis bounds will be recalculated if necessary.
 *
 * @param event  information about the event (not used here).
 */
public void datasetChanged(DatasetChangeEvent event) {

    int count = this.rangeAxes.size();
    for (int axisIndex = 0; axisIndex < count; axisIndex++) {
        ValueAxis yAxis = getRangeAxis(axisIndex);
        if (yAxis != null) {
            yAxis.configure();
        }
    }
    if (getParent() != null) {
        getParent().datasetChanged(event);
    }
    else {
        PlotChangeEvent e = new PlotChangeEvent(this);
        notifyListeners(e);
    }

}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Returns the domain axis for a dataset.
 *
 * @param index  the dataset index.
 *
 * @return The axis.
 */
public ValueAxis getDomainAxisForDataset(int index) {

    if (index < 0 || index >= getDatasetCount()) {
        throw new IllegalArgumentException("Index 'index' out of bounds.");
    }

    ValueAxis valueAxis = null;
    Integer axisIndex = (Integer) this.datasetToDomainAxisMap.get(
            new Integer(index));
    if (axisIndex != null) {
        valueAxis = getDomainAxis(axisIndex.intValue());
    }
    else {
        valueAxis = getDomainAxis(0);
    }
    return valueAxis;

}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Sets a domain axis and, if requested, sends a {@link PlotChangeEvent} to
 * all registered listeners.
 *
 * @param index  the axis index.
 * @param axis  the axis.
 * @param notify  notify listeners?
 * 
 * @see #getDomainAxis(int)
 */
public void setDomainAxis(int index, ValueAxis axis, boolean notify) {
    ValueAxis existing = getDomainAxis(index);
    if (existing != null) {
        existing.removeChangeListener(this);
    }
    if (axis != null) {
        axis.setPlot(this);
    }
    this.domainAxes.set(index, axis);
    if (axis != null) {
        axis.configure();
        axis.addChangeListener(this);
    }
    if (notify) {
        notifyListeners(new PlotChangeEvent(this));
    }
}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Sets the range axis for the plot.
 *
 * @param axis  the new axis.
 */
public void setRangeAxis(ValueAxis axis) {

    if (axis != null) {
        axis.setPlot(this);
        axis.addChangeListener(this);
    }

    // plot is likely registered as a listener with the existing axis...
    if (this.rangeAxis != null) {
        this.rangeAxis.removeChangeListener(this);
    }

    this.rangeAxis = axis;

}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Sets the range axis for the plot.
 * <P>
 * An exception is thrown if the new axis and the plot are not mutually compatible.
 *
 * @param axis  the new axis.
 */
public void setRangeAxis(ValueAxis axis) {

  if (axis != null) {
    axis.setPlot(this);
    axis.addChangeListener(this);
  }

  // plot is likely registered as a listener with the existing axis...
  if (this.rangeAxis != null) {
    this.rangeAxis.removeChangeListener(this);
  }

  this.rangeAxis = axis;

}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Returns the range for an axis.
 *
 * @param axis  the axis.
 *
 * @return The range for an axis.
 */
public Range getDataRange(ValueAxis axis) {

    if (this.dataset == null) {
        return null;
    }

    Range result = null;

    if (axis == getDomainAxis()) {
        result = DatasetUtilities.findDomainExtent(this.dataset);
    }
    else if (axis == getRangeAxis()) {
        result = DatasetUtilities.findRangeExtent(this.dataset);
    }

    return result;

}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Draws a range crosshair.
 * 
 * @param g2  the graphics target.
 * @param dataArea  the data area.
 * @param orientation  the plot orientation.
 * @param value  the crosshair value.
 * @param axis  the axis against which the value is measured.
 * @param stroke  the stroke used to draw the crosshair line.
 * @param paint  the paint used to draw the crosshair line.
 * 
 * @since 1.0.5
 */
protected void drawRangeCrosshair(Graphics2D g2, Rectangle2D dataArea, 
        PlotOrientation orientation, double value, ValueAxis axis, 
        Stroke stroke, Paint paint) {
    
    if (!axis.getRange().contains(value)) {
        return;
    }
    Line2D line = null;
    if (orientation == PlotOrientation.HORIZONTAL) {
        double xx = axis.valueToJava2D(value, dataArea, 
                RectangleEdge.BOTTOM);
        line = new Line2D.Double(xx, dataArea.getMinY(), xx, 
                dataArea.getMaxY());
    }
    else {
        double yy = axis.valueToJava2D(value, dataArea, 
                RectangleEdge.LEFT);
        line = new Line2D.Double(dataArea.getMinX(), yy, 
                dataArea.getMaxX(), yy);
    }
    g2.setStroke(stroke);
    g2.setPaint(paint);
    g2.draw(line);
   
}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Draws the range tick bands, if any.
 *
 * @param g2  the graphics device.
 * @param dataArea  the data area.
 * @param ticks  the ticks.
 */
public void drawRangeTickBands(Graphics2D g2, Rectangle2D dataArea, List ticks) {

    // draw the range tick bands, if any...
    Paint bandPaint = getRangeTickBandPaint();
    if (bandPaint != null) {
        boolean fillBand = false;
        final ValueAxis axis = getRangeAxis();
        double previous = axis.getLowerBound();
        Iterator iterator = ticks.iterator();
        while (iterator.hasNext()) {
            ValueTick tick = (ValueTick) iterator.next();
            double current = tick.getValue();
            if (fillBand) {
                getRenderer().fillRangeGridBand(g2, this, axis, dataArea, previous, current);
            }
            previous = current;
            fillBand = !fillBand;
        }
        double end = axis.getUpperBound();
        if (fillBand) {
            getRenderer().fillRangeGridBand(g2, this, axis, dataArea, previous, end);
        }
    }
}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Sets a range axis and, if requested, sends a {@link PlotChangeEvent} to 
 * all registered listeners.
 *
 * @param index  the axis index.
 * @param axis  the axis (<code>null</code> permitted).
 * @param notify  notify listeners?
 * 
 * @see #getRangeAxis(int)
 */
public void setRangeAxis(int index, ValueAxis axis, boolean notify) {
    ValueAxis existing = getRangeAxis(index);
    if (existing != null) {
        existing.removeChangeListener(this);
    }
    if (axis != null) {
        axis.setPlot(this);
    }
    this.rangeAxes.set(index, axis);
    if (axis != null) {
        axis.configure();
        axis.addChangeListener(this);
    }
    if (notify) {
        notifyListeners(new PlotChangeEvent(this));
    }
}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Fills a band between two values on the axis.  This can be used to color
 * bands between the grid lines.
 *
 * @param g2  the graphics device.
 * @param plot  the plot.
 * @param axis  the domain axis.
 * @param dataArea  the data area.
 * @param start  the start value.
 * @param end  the end value.
 */
public void fillDomainGridBand(Graphics2D g2,
                               XYPlot plot,
                               ValueAxis axis,
                               Rectangle2D dataArea,
                               double start, double end) {

    double x1 = axis.valueToJava2D(start, dataArea,
            plot.getDomainAxisEdge());
    double x2 = axis.valueToJava2D(end, dataArea,
            plot.getDomainAxisEdge());
    // TODO: need to change the next line to take account of plot
    //       orientation...
    Rectangle2D band = new Rectangle2D.Double(x1, dataArea.getMinY(),
            x2 - x1, dataArea.getMaxY() - dataArea.getMinY());
    Paint paint = plot.getDomainTickBandPaint();

    if (paint != null) {
        g2.setPaint(paint);
        g2.fill(band);
    }

}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Replaces the dataset and checks that it has changed as expected.
 */
public void testReplaceDataset() {

    // create a dataset...
    Number[][] data = new Integer[][]
        {{new Integer(-30), new Integer(-20)},
         {new Integer(-10), new Integer(10)},
         {new Integer(20), new Integer(30)}};

    CategoryDataset newData = DatasetUtilities.createCategoryDataset("S", 
            "C", data);

    LocalListener l = new LocalListener();
    this.chart.addChangeListener(l);
    CategoryPlot plot = (CategoryPlot) this.chart.getPlot();
    plot.setDataset(newData);
    assertEquals(true, l.flag);
    ValueAxis axis = plot.getRangeAxis();
    Range range = axis.getRange();
    assertTrue("Expecting the lower bound of the range to be around -30: "
                + range.getLowerBound(), range.getLowerBound() <= -30);
    assertTrue("Expecting the upper bound of the range to be around 30: "
               + range.getUpperBound(), range.getUpperBound() >= 30);

}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Creates and returns a default instance of a candlesticks chart.
 *
 * @param title  the chart title (<code>null</code> permitted).
 * @param timeAxisLabel  a label for the time axis (<code>null</code> 
 *                       permitted).
 * @param valueAxisLabel  a label for the value axis (<code>null</code> 
 *                        permitted).
 * @param dataset  the dataset for the chart (<code>null</code> permitted).
 * @param legend  a flag specifying whether or not a legend is required.
 *
 * @return A candlestick chart.
 */
public static JFreeChart createCandlestickChart(String title,
                                                String timeAxisLabel,
                                                String valueAxisLabel,
                                                OHLCDataset dataset,
                                                boolean legend) {

    ValueAxis timeAxis = new DateAxis(timeAxisLabel);
    NumberAxis valueAxis = new NumberAxis(valueAxisLabel);
    XYPlot plot = new XYPlot(dataset, timeAxis, valueAxis, null);
    plot.setRenderer(new CandlestickRenderer());
    JFreeChart chart = new JFreeChart(title, JFreeChart.DEFAULT_TITLE_FONT,
            plot, legend);
    return chart;

}
 

import org.jfree.chart.axis.ValueAxis; //導入依賴的package包/類
/**
 * Draws a range crosshair.
 * 
 * @param g2  the graphics target.
 * @param dataArea  the data area.
 * @param orientation  the plot orientation.
 * @param value  the crosshair value.
 * @param axis  the axis against which the value is measured.
 * @param stroke  the stroke used to draw the crosshair line.
 * @param paint  the paint used to draw the crosshair line.
 * 
 * @since 1.0.4
 */
protected void drawRangeCrosshair(Graphics2D g2, Rectangle2D dataArea, 
        PlotOrientation orientation, double value, ValueAxis axis, 
        Stroke stroke, Paint paint) {
    
    if (axis.getRange().contains(value)) {
        Line2D line = null;
        if (orientation == PlotOrientation.HORIZONTAL) {
            double xx = axis.valueToJava2D(value, dataArea, 
                    RectangleEdge.BOTTOM);
            line = new Line2D.Double(xx, dataArea.getMinY(), xx, 
                    dataArea.getMaxY());
        }
        else {
            double yy = axis.valueToJava2D(value, dataArea, 
                    RectangleEdge.LEFT);
            line = new Line2D.Double(dataArea.getMinX(), yy, 
                    dataArea.getMaxX(), yy);
        }
        g2.setStroke(stroke);
        g2.setPaint(paint);
        g2.draw(line);
    }
    
}