abstractcategoryitemrenderer.java

java图形利器

            final Composite savedComposite = g2.getComposite();
            g2.setComposite(AlphaComposite.getInstance(
                    AlphaComposite.SRC_OVER, marker.getAlpha()));

            double start2d = axis.valueToJava2D(start, dataArea,
                    plot.getRangeAxisEdge());
            double end2d = axis.valueToJava2D(end, dataArea,
                    plot.getRangeAxisEdge());
            double low = Math.min(start2d, end2d);
            double high = Math.max(start2d, end2d);

            PlotOrientation orientation = plot.getOrientation();
            Rectangle2D rect = null;
            if (orientation == PlotOrientation.HORIZONTAL) {
                // clip left and right bounds to data area
                low = Math.max(low, dataArea.getMinX());
                high = Math.min(high, dataArea.getMaxX());
                rect = new Rectangle2D.Double(low,
                        dataArea.getMinY(), high - low,
                        dataArea.getHeight());
            }
            else if (orientation == PlotOrientation.VERTICAL) {
                // clip top and bottom bounds to data area
                low = Math.max(low, dataArea.getMinY());
                high = Math.min(high, dataArea.getMaxY());
                rect = new Rectangle2D.Double(dataArea.getMinX(),
                        low, dataArea.getWidth(),
                        high - low);
            }
            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) {
                if (orientation == PlotOrientation.VERTICAL) {
                    Line2D line = new Line2D.Double();
                    double x0 = dataArea.getMinX();
                    double x1 = dataArea.getMaxX();
                    g2.setPaint(im.getOutlinePaint());
                    g2.setStroke(im.getOutlineStroke());
                    if (range.contains(start)) {
                        line.setLine(x0, start2d, x1, start2d);
                        g2.draw(line);
                    }
                    if (range.contains(end)) {
                        line.setLine(x0, end2d, x1, end2d);
                        g2.draw(line);
                    }
                }
                else { // PlotOrientation.HORIZONTAL
                    Line2D line = new Line2D.Double();
                    double y0 = dataArea.getMinY();
                    double y1 = dataArea.getMaxY();
                    g2.setPaint(im.getOutlinePaint());
                    g2.setStroke(im.getOutlineStroke());
                    if (range.contains(start)) {
                        line.setLine(start2d, y0, start2d, y1);
                        g2.draw(line);
                    }
                    if (range.contains(end)) {
                        line.setLine(end2d, y0, end2d, 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 = calculateRangeMarkerTextAnchorPoint(
                        g2, orientation, dataArea, rect,
                        marker.getLabelOffset(), marker.getLabelOffsetType(),
                        anchor);
                TextUtilities.drawAlignedString(label, g2,
                        (float) coordinates.getX(), (float) coordinates.getY(),
                        marker.getLabelTextAnchor());
            }
            g2.setComposite(savedComposite);
        }
    }

    /**
     * Calculates the (x, y) coordinates for drawing the label for a marker on
     * the range axis.
     *
     * @param g2  the graphics device.
     * @param orientation  the plot orientation.
     * @param dataArea  the data area.
     * @param markerArea  the rectangle surrounding the marker.
     * @param markerOffset  the marker 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);

    }

    /**
     * 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.
     * @param markerOffset  the marker offset.
     * @param labelOffsetType  the label offset type.
     * @param anchor  the label anchor.
     *
     * @return The coordinates for drawing the marker label.
     */
    protected Point2D calculateRangeMarkerTextAnchorPoint(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,
                    labelOffsetType, LengthAdjustmentType.CONTRACT);
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            anchorRect = markerOffset.createAdjustedRectangle(markerArea,
                    LengthAdjustmentType.CONTRACT, labelOffsetType);
        }
        return RectangleAnchor.coordinates(anchorRect, anchor);

    }

    /**
     * Returns a legend item for a series.  This default implementation will
     * return <code>null</code> if {@link #isSeriesVisible(int)} or 
     * {@link #isSeriesVisibleInLegend(int)} returns <code>false</code>.
     *
     * @param datasetIndex  the dataset index (zero-based).
     * @param series  the series index (zero-based).
     *
     * @return The legend item (possibly <code>null</code>).
     *
     * @see #getLegendItems()
     */
    public LegendItem getLegendItem(int datasetIndex, int series) {

        CategoryPlot p = getPlot();
        if (p == null) {
            return null;
        }

        // check that a legend item needs to be displayed...
        if (!isSeriesVisible(series) || !isSeriesVisibleInLegend(series)) {
            return null;
        }

        CategoryDataset dataset = p.getDataset(datasetIndex);
        String label = this.legendItemLabelGenerator.generateLabel(dataset,
                series);
        String description = label;
        String toolTipText = null;
        if (this.legendItemToolTipGenerator != null) {
            toolTipText = this.legendItemToolTipGenerator.generateLabel(
                    dataset, series);
        }
        String urlText = null;
        if (this.legendItemURLGenerator != null) {
            urlText = this.legendItemURLGenerator.generateLabel(dataset,
                    series);
        }
        Shape shape = lookupSeriesShape(series);
        Paint paint = lookupSeriesPaint(series);
        Paint outlinePaint = lookupSeriesOutlinePaint(series);
        Stroke outlineStroke = lookupSeriesOutlineStroke(series);

        LegendItem item = new LegendItem(label, description, toolTipText,
                urlText, shape, paint, outlineStroke, outlinePaint);
        item.setSeriesKey(dataset.getRowKey(series));
        item.setSeriesIndex(series);
        item.setDataset(dataset);
        item.setDatasetIndex(datasetIndex);
        return item;
    }

    /**
     * Tests this renderer for equality with another object.
     *
     * @param obj  the object.
     *
     * @return <code>true</code> or <code>false</code>.
     */
    public boolean equals(Object obj) {

        if (obj == this) {
            return true;
        }
        if (!(obj instanceof AbstractCategoryItemRenderer)) {
            return false;
        }
        AbstractCategoryItemRenderer that = (AbstractCategoryItemRenderer) obj;

        if (!ObjectUtilities.equal(this.itemLabelGenerator,
                that.itemLabelGenerator)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.itemLabelGeneratorList,
                that.itemLabelGeneratorList)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.baseItemLabelGenerator,
                that.baseItemLabelGenerator)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.toolTipGenerator,
                that.toolTipGenerator)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.toolTipGeneratorList,
                that.toolTipGeneratorList)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.baseToolTipGenerator,
                that.baseToolTipGenerator)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.itemURLGenerator,
                that.itemURLGenerator)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.itemURLGeneratorList,
                that.itemURLGeneratorList)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.baseItemURLGenerator,
                that.baseItemURLGenerator)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.legendItemLabelGenerator,
                that.legendItemLabelGenerator)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.legendItemToolTipGenerator,
                that.legendItemToolTipGenerator)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.legendItemURLGenerator,
                that.legendItemURLGenerator)) {
            return false;
        }
        return super.equals(obj);
    }

    /**
     * Returns a hash code for the renderer.
     *
     * @return The hash code.
     */
    public int hashCode() {
        int result = super.hashCode();
        return result;
    }

    /**
     * Returns the drawing supplier from the plot.
     *
     * @return The drawing supplier (possibly <code>null</code>).
     */
    public DrawingSupplier getDrawingSupplier() {
        DrawingSupplier result = null;
        CategoryPlot cp = getPlot();
        if (cp != null) {
            result = cp.getDrawingSupplier();
        }
        return result;
    }

    /**
     * Draws an item label.
     *
     * @param g2  the graphics device.
     * @param orientation  the orientation.
     * @param dataset  the dataset.
     * @param row  the row.
     * @param column  the column.
     * @param x  the x coordinate (in Java2D space).
     * @param y  the y coordinate (in Java2D space).
     * @param negative  indicates a negative value (which affects the item
     *                  label position).
     */
    protected void drawItemLabel(Graphics2D g2,