abstractxyitemrenderer.java

来自「JFreeChart它主要是用来制作各种各样的图表」· Java 代码 · 共 1,520 行 · 第 1/4 页

                x2 - x1, dataArea.getMaxY() - dataArea.getMinY());
        Paint paint = plot.getDomainTickBandPaint();

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

    }

    /**
     * Fills a band between two values on the range axis.  This can be used to 
     * color bands between the grid lines.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param axis  the range axis.
     * @param dataArea  the data area.
     * @param start  the start value.
     * @param end  the end value.
     */
    public void fillRangeGridBand(Graphics2D g2,
                                  XYPlot plot,
                                  ValueAxis axis,
                                  Rectangle2D dataArea,
                                  double start, double end) {

        double y1 = axis.valueToJava2D(start, dataArea, 
                plot.getRangeAxisEdge());
        double y2 = axis.valueToJava2D(end, dataArea, plot.getRangeAxisEdge());
        // TODO: need to change the next line to take account of the plot 
        //       orientation
        Rectangle2D band = new Rectangle2D.Double(dataArea.getMinX(), y2, 
                dataArea.getWidth(), y1 - y2);
        Paint paint = plot.getRangeTickBandPaint();

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

    }

    /**
     * Draws a grid line against the range axis.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param axis  the value axis.
     * @param dataArea  the area for plotting data (not yet adjusted for any 
     *                  3D effect).
     * @param value  the value at which the grid line should be drawn.
     */
    public void drawDomainGridLine(Graphics2D g2,
                                   XYPlot plot,
                                   ValueAxis axis,
                                   Rectangle2D dataArea,
                                   double value) {

        Range range = axis.getRange();
        if (!range.contains(value)) {
            return;
        }

        PlotOrientation orientation = plot.getOrientation();
        double v = axis.valueToJava2D(value, dataArea, 
                plot.getDomainAxisEdge());
        Line2D line = null;
        if (orientation == PlotOrientation.HORIZONTAL) {
            line = new Line2D.Double(dataArea.getMinX(), v, 
                    dataArea.getMaxX(), v);
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            line = new Line2D.Double(v, dataArea.getMinY(), v, 
                    dataArea.getMaxY());
        }

        Paint paint = plot.getDomainGridlinePaint();
        Stroke stroke = plot.getDomainGridlineStroke();
        g2.setPaint(paint != null ? paint : Plot.DEFAULT_OUTLINE_PAINT);
        g2.setStroke(stroke != null ? stroke : Plot.DEFAULT_OUTLINE_STROKE);
        g2.draw(line);

    }

    /**
     * Draws a line perpendicular to the range axis.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param axis  the value axis.
     * @param dataArea  the area for plotting data (not yet adjusted for any 3D
     *                  effect).
     * @param value  the value at which the grid line should be drawn.
     * @param paint  the paint.
     * @param stroke  the stroke.
     */
    public void drawRangeLine(Graphics2D g2,
                              XYPlot plot,
                              ValueAxis axis,
                              Rectangle2D dataArea,
                              double value,
                              Paint paint,
                              Stroke stroke) {

        Range range = axis.getRange();
        if (!range.contains(value)) {
            return;
        }

        PlotOrientation orientation = plot.getOrientation();
        Line2D line = null;
        double v = axis.valueToJava2D(value, dataArea, plot.getRangeAxisEdge());
        if (orientation == PlotOrientation.HORIZONTAL) {
            line = new Line2D.Double(v, dataArea.getMinY(), v, 
                    dataArea.getMaxY());
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            line = new Line2D.Double(dataArea.getMinX(), v, 
                    dataArea.getMaxX(), v);
        }
        
        g2.setPaint(paint);
        g2.setStroke(stroke);
        g2.draw(line);

    }

    /**
     * Draws a vertical line on the chart to represent a 'range marker'.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param domainAxis  the domain axis.
     * @param marker  the marker line.
     * @param dataArea  the axis data area.
     */
    public void drawDomainMarker(Graphics2D g2,
                                 XYPlot plot,
                                 ValueAxis domainAxis,
                                 Marker marker,
                                 Rectangle2D dataArea) {

        if (marker instanceof ValueMarker) {
            ValueMarker vm = (ValueMarker) marker;
            double value = vm.getValue();
            Range range = domainAxis.getRange();
            if (!range.contains(value)) {
                return;
            }

            double v = domainAxis.valueToJava2D(value, dataArea, 
                    plot.getDomainAxisEdge());

            PlotOrientation orientation = plot.getOrientation();
            Line2D line = null;
            if (orientation == PlotOrientation.HORIZONTAL) {
                line = new Line2D.Double(dataArea.getMinX(), v, 
                        dataArea.getMaxX(), v);
            }
            else if (orientation == PlotOrientation.VERTICAL) {
                line = new Line2D.Double(v, dataArea.getMinY(), v, 
                        dataArea.getMaxY());
            }

            final Composite originalComposite = g2.getComposite();
            g2.setComposite(AlphaComposite.getInstance(
                    AlphaComposite.SRC_OVER, marker.getAlpha()));
            g2.setPaint(marker.getPaint());
            g2.setStroke(marker.getStroke());
            g2.draw(line);

            String label = marker.getLabel();
            RectangleAnchor anchor = marker.getLabelAnchor();
            if (label != null) {
                Font labelFont = marker.getLabelFont();
                g2.setFont(labelFont);
                g2.setPaint(marker.getLabelPaint());
                Point2D coordinates = calculateDomainMarkerTextAnchorPoint(
                        g2, orientation, dataArea, line.getBounds2D(), 
                        marker.getLabelOffset(), 
                        LengthAdjustmentType.EXPAND, anchor);
                TextUtilities.drawAlignedString(label, g2, 
                        (float) coordinates.getX(), (float) coordinates.getY(), 
                        marker.getLabelTextAnchor());
            }
            g2.setComposite(originalComposite);
        }
        else if (marker instanceof IntervalMarker) {
            IntervalMarker im = (IntervalMarker) marker;
            double start = im.getStartValue();
            double end = im.getEndValue();
            Range range = domainAxis.getRange();
            if (!(range.intersects(start, end))) {
                return;
            }

            double start2d = domainAxis.valueToJava2D(start, dataArea, 
                    plot.getDomainAxisEdge());
            double end2d = domainAxis.valueToJava2D(end, dataArea, 
                    plot.getDomainAxisEdge());

            PlotOrientation orientation = plot.getOrientation();
            Rectangle2D rect = null;
            if (orientation == PlotOrientation.HORIZONTAL) {
                rect = new Rectangle2D.Double(dataArea.getMinX(), 
                        Math.min(start2d, end2d), dataArea.getWidth(), 
                        Math.abs(end2d - start2d));
            }
            else if (orientation == PlotOrientation.VERTICAL) {
                rect = new Rectangle2D.Double(Math.min(start2d, end2d), 
                        dataArea.getMinY(), Math.abs(end2d - start2d), 
                        dataArea.getHeight());
            }

            final Composite originalComposite = g2.getComposite();
            g2.setComposite(AlphaComposite.getInstance(
                    AlphaComposite.SRC_OVER, marker.getAlpha()));
            Paint p = marker.getPaint();
            if (p instanceof GradientPaint) {
                GradientPaint gp = (GradientPaint) p;
                GradientPaintTransformer t = im.getGradientPaintTransformer();
                if (t != null) {
                    gp = t.transform(gp, rect);  
                }
                g2.setPaint(gp);
            }
            else {
                g2.setPaint(p);
            }
            g2.fill(rect);
            
            // now draw the outlines, if visible...
            if (im.getOutlinePaint() != null && im.getOutlineStroke() != null) {
                double x0 = rect.getMinX();
                double x1 = rect.getMaxX();
                double y0 = rect.getMinY();
                double y1 = rect.getMaxY();
                if (orientation == PlotOrientation.VERTICAL) {
                    Line2D line = new Line2D.Double(x0, y0, x0, y1);
                    g2.setPaint(im.getOutlinePaint());
                    g2.setStroke(im.getOutlineStroke());
                    g2.draw(line);
                    line.setLine(x1, y0, x1, y1);
                    g2.draw(line);
                }
                else { // PlotOrientation.HORIZONTAL
                    Line2D line = new Line2D.Double(x0, y0, x1, y0);
                    g2.setPaint(im.getOutlinePaint());
                    g2.setStroke(im.getOutlineStroke());
                    g2.draw(line);
                    line.setLine(x0, y1, x1, y1);
                    g2.draw(line);                    
                }
            }

            String label = marker.getLabel();
            RectangleAnchor anchor = marker.getLabelAnchor();
            if (label != null) {
                Font labelFont = marker.getLabelFont();
                g2.setFont(labelFont);
                g2.setPaint(marker.getLabelPaint());
                Point2D coordinates = calculateDomainMarkerTextAnchorPoint(
                        g2, orientation, dataArea, rect, 
                        marker.getLabelOffset(), marker.getLabelOffsetType(), 
                        anchor);
                TextUtilities.drawAlignedString(label, g2, 
                        (float) coordinates.getX(), (float) coordinates.getY(), 
                        marker.getLabelTextAnchor());
            }
            g2.setComposite(originalComposite);

        }

    }

    /**
     * Calculates the (x, y) coordinates for drawing a marker label.
     *
     * @param g2  the graphics device.
     * @param orientation  the plot orientation.
     * @param dataArea  the data area.
     * @param markerArea  the rectangle surrounding the marker area.
     * @param markerOffset  the marker label offset.
     * @param labelOffsetType  the label offset type.
     * @param anchor  the label anchor.
     *
     * @return The coordinates for drawing the marker label.
     */
    protected Point2D calculateDomainMarkerTextAnchorPoint(Graphics2D g2,
            PlotOrientation orientation,
            Rectangle2D dataArea,
            Rectangle2D markerArea,
            RectangleInsets markerOffset,
            LengthAdjustmentType labelOffsetType,
            RectangleAnchor anchor) {

        Rectangle2D anchorRect = null;
        if (orientation == PlotOrientation.HORIZONTAL) {
            anchorRect = markerOffset.createAdjustedRectangle(markerArea, 
                    LengthAdjustmentType.CONTRACT, labelOffsetType);
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            anchorRect = markerOffset.createAdjustedRectangle(markerArea, 
                    labelOffsetType, LengthAdjustmentType.CONTRACT);
        }
        return RectangleAnchor.coordinates(anchorRect, anchor);

    }

    /**
     * Draws a horizontal line across the chart to represent a 'range marker'.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param rangeAxis  the range axis.
     * @param marker  the marker line.
     * @param dataArea  the axis data area.
     */
    public void drawRangeMarker(Graphics2D g2,
                                XYPlot plot,
                                ValueAxis rangeAxis,
                                Marker marker,
                                Rectangle2D dataArea) {

        if (marker instanceof ValueMarker) {
            ValueMarker vm = (ValueMarker) marker;
            double value = vm.getValue();
            Range range = rangeAxis.getRange();
            if (!range.contains(value)) {
                return;
            }

            double v = rangeAxis.valueToJava2D(value, dataArea, 
                    plot.getRangeAxisEdge());
            PlotOrientation orientation = plot.getOrientation();
            Line2D line = null;
            if (orientation == PlotOrientation.HORIZONTAL) {
                line = new Line2D.Double(v, dataArea.getMinY(), v, 
                        dataArea.getMaxY());
            }
            else if (orientation == PlotOrientation.VERTICAL) {
                line = new Line2D.Double(dataArea.getMinX(), v, 
                        dataArea.getMaxX(), v);
            }

            final Composite originalComposite = g2.getComposite();
            g2.setComposite(AlphaComposite.getInstance(
                    AlphaComposite.SRC_OVER, marker.getAlpha()));
            g2.setPaint(marker.getPaint());
            g2.setStroke(marker.getStroke());
            g2.draw(line);

            String label = marker.getLabel();
            RectangleAnchor anchor = marker.getLabelAnchor();
            if (label != null) {
                Font labelFont = marker.getLabelFont();
                g2.setFont(labelFont);
                g2.setPaint(marker.getLabelPaint());
                Point2D coordinates = calculateRangeMarkerTextAnchorPoint(
                        g2, orientation, dataArea, line.getBounds2D(), 
                        marker.getLabelOffset(), 
                        LengthAdjustmentType.EXPAND, anchor);
                TextUtilities.drawAlignedString(label, g2, 
                        (float) coordinates.getX(), (float) coordinates.getY(), 
                        marker.getLabelTextAnchor());
            }
            g2.setComposite(originalComposite);
        }
        else if (marker instanceof IntervalMarker) {
            
            IntervalMarker im = (IntervalMarker) marker;
            double start = im.getStartValue();
            double end = im.getEndValue();
            Range range = rangeAxis.getRange();
            if (!(range.intersects(start, end))) {
                return;
            }

            double start2d = rangeAxis.valueToJava2D(start, dataArea,