contourplot.java

java图形利器

            if (isDomainCrosshairVisible()) {
                drawVerticalLine(g2, dataArea,
                                 getDomainCrosshairValue(),
                                 getDomainCrosshairStroke(),
                                 getDomainCrosshairPaint());
            }

            // draw horizontal crosshair if required...
            setRangeCrosshairValue(crosshairState.getCrosshairY(), false);
            if (isRangeCrosshairVisible()) {
                drawHorizontalLine(g2, dataArea,
                                   getRangeCrosshairValue(),
                                   getRangeCrosshairStroke(),
                                   getRangeCrosshairPaint());
            }

        }
        else if (this.clipPath != null) {
            getClipPath().draw(g2, dataArea, this.domainAxis, this.rangeAxis);
        }

    }

    /**
     * Fills the plot.
     *
     * @param g2  the graphics device.
     * @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 horizontalAxis  the domain (horizontal) axis.
     * @param verticalAxis  the range (vertical) axis.
     * @param colorBar  the color bar axis.
     * @param data  the dataset.
     * @param crosshairState  information about crosshairs on a plot.
     */
    public void contourRenderer(Graphics2D g2,
                                Rectangle2D dataArea,
                                PlotRenderingInfo info,
                                ContourPlot plot,
                                ValueAxis horizontalAxis,
                                ValueAxis verticalAxis,
                                ColorBar colorBar,
                                ContourDataset data,
                                CrosshairState crosshairState) {

        // setup for collecting optional entity info...
        Rectangle2D.Double entityArea = null;
        EntityCollection entities = null;
        if (info != null) {
            entities = info.getOwner().getEntityCollection();
        }

        Rectangle2D.Double rect = null;
        rect = new Rectangle2D.Double();

        //turn off anti-aliasing when filling rectangles
        Object antiAlias = g2.getRenderingHint(RenderingHints.KEY_ANTIALIASING);
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, 
                RenderingHints.VALUE_ANTIALIAS_OFF);

        // get the data points
        Number[] xNumber = data.getXValues();
        Number[] yNumber = data.getYValues();
        Number[] zNumber = data.getZValues();

        double[] x = new double[xNumber.length];
        double[] y = new double[yNumber.length];

        for (int i = 0; i < x.length; i++) {
            x[i] = xNumber[i].doubleValue();
            y[i] = yNumber[i].doubleValue();
        }

        int[] xIndex = data.indexX();
        int[] indexX = data.getXIndices();
        boolean vertInverted = ((NumberAxis) verticalAxis).isInverted();
        boolean horizInverted = false;
        if (horizontalAxis instanceof NumberAxis) {
            horizInverted = ((NumberAxis) horizontalAxis).isInverted();
        }
        double transX = 0.0;
        double transXm1 = 0.0;
        double transXp1 = 0.0;
        double transDXm1 = 0.0;
        double transDXp1 = 0.0;
        double transDX = 0.0;
        double transY = 0.0;
        double transYm1 = 0.0;
        double transYp1 = 0.0;
        double transDYm1 = 0.0;
        double transDYp1 = 0.0;
        double transDY = 0.0;
        int iMax = xIndex[xIndex.length - 1];
        for (int k = 0; k < x.length; k++) {
            int i = xIndex[k];
            if (indexX[i] == k) { // this is a new column
                if (i == 0) {
                    transX = horizontalAxis.valueToJava2D(x[k], dataArea, 
                            RectangleEdge.BOTTOM);
                    transXm1 = transX;
                    transXp1 = horizontalAxis.valueToJava2D(
                            x[indexX[i + 1]], dataArea, RectangleEdge.BOTTOM);
                    transDXm1 = Math.abs(0.5 * (transX - transXm1));
                    transDXp1 = Math.abs(0.5 * (transX - transXp1));
                }
                else if (i == iMax) {
                    transX = horizontalAxis.valueToJava2D(x[k], dataArea, 
                            RectangleEdge.BOTTOM);
                    transXm1 = horizontalAxis.valueToJava2D(x[indexX[i - 1]], 
                            dataArea, RectangleEdge.BOTTOM);
                    transXp1 = transX;
                    transDXm1 = Math.abs(0.5 * (transX - transXm1));
                    transDXp1 = Math.abs(0.5 * (transX - transXp1));
                }
                else {
                    transX = horizontalAxis.valueToJava2D(x[k], dataArea, 
                            RectangleEdge.BOTTOM);
                    transXp1 = horizontalAxis.valueToJava2D(x[indexX[i + 1]], 
                            dataArea, RectangleEdge.BOTTOM);
                    transDXm1 = transDXp1;
                    transDXp1 = Math.abs(0.5 * (transX - transXp1));
                }

                if (horizInverted) {
                    transX -= transDXp1;
                }
                else {
                    transX -= transDXm1;
                }

                transDX = transDXm1 + transDXp1;

                transY = verticalAxis.valueToJava2D(y[k], dataArea, 
                        RectangleEdge.LEFT);
                transYm1 = transY;
                if (k + 1 == y.length) {
                    continue;
                }
                transYp1 = verticalAxis.valueToJava2D(y[k + 1], dataArea, 
                        RectangleEdge.LEFT);
                transDYm1 = Math.abs(0.5 * (transY - transYm1));
                transDYp1 = Math.abs(0.5 * (transY - transYp1));
            }
            else if ((i < indexX.length - 1 
                     && indexX[i + 1] - 1 == k) || k == x.length - 1) {
                // end of column
                transY = verticalAxis.valueToJava2D(y[k], dataArea, 
                        RectangleEdge.LEFT);
                transYm1 = verticalAxis.valueToJava2D(y[k - 1], dataArea, 
                        RectangleEdge.LEFT);
                transYp1 = transY;
                transDYm1 = Math.abs(0.5 * (transY - transYm1));
                transDYp1 = Math.abs(0.5 * (transY - transYp1));
            }
            else {
                transY = verticalAxis.valueToJava2D(y[k], dataArea, 
                        RectangleEdge.LEFT);
                transYp1 = verticalAxis.valueToJava2D(y[k + 1], dataArea, 
                        RectangleEdge.LEFT);
                transDYm1 = transDYp1;
                transDYp1 = Math.abs(0.5 * (transY - transYp1));
            }
            if (vertInverted) {
                transY -= transDYm1;
            }
            else {
                transY -= transDYp1;
            }

            transDY = transDYm1 + transDYp1;

            rect.setRect(transX, transY, transDX, transDY);
            if (zNumber[k] != null) {
                g2.setPaint(colorBar.getPaint(zNumber[k].doubleValue()));
                g2.fill(rect);
            }
            else if (this.missingPaint != null) {
                g2.setPaint(this.missingPaint);
                g2.fill(rect);
            }

            entityArea = rect;

            // add an entity for the item...
            if (entities != null) {
                String tip = "";
                if (getToolTipGenerator() != null) {
                    tip = this.toolTipGenerator.generateToolTip(data, k);
                }
//              Shape s = g2.getClip();
//              if (s.contains(rect) || s.intersects(rect)) {
                String url = null;
                // if (getURLGenerator() != null) {    //dmo: look at this later
                //      url = getURLGenerator().generateURL(data, series, item);
                // }
                // Unlike XYItemRenderer, we need to clone entityArea since it 
                // reused.
                ContourEntity entity = new ContourEntity(
                        (Rectangle2D.Double) entityArea.clone(), tip, url);
                entity.setIndex(k);
                entities.add(entity);
//              }
            }

            // do we need to update the crosshair values?
            if (plot.isDomainCrosshairLockedOnData()) {
                if (plot.isRangeCrosshairLockedOnData()) {
                    // both axes
                    crosshairState.updateCrosshairPoint(x[k], y[k], transX, 
                            transY, PlotOrientation.VERTICAL);
                }
                else {
                    // just the horizontal axis...
                    crosshairState.updateCrosshairX(transX);
                }
            }
            else {
                if (plot.isRangeCrosshairLockedOnData()) {
                    // just the vertical axis...
                    crosshairState.updateCrosshairY(transY);
                }
            }
        }

        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, antiAlias);

        return;

    }

    /**
     * Draws the visual representation of a single data item.
     *
     * @param g2  the graphics device.
     * @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 (horizontal) axis.
     * @param rangeAxis  the range (vertical) axis.
     * @param colorBar  the color bar axis.
     * @param data  the dataset.
     * @param crosshairState  information about crosshairs on a plot.
     */
    public void pointRenderer(Graphics2D g2,
                              Rectangle2D dataArea,
                              PlotRenderingInfo info,
                              ContourPlot plot,
                              ValueAxis domainAxis,
                              ValueAxis rangeAxis,
                              ColorBar colorBar,
                              ContourDataset data,
                              CrosshairState crosshairState) {

        // setup for collecting optional entity info...
        RectangularShape entityArea = null;
        EntityCollection entities = null;
        if (info != null) {
            entities = info.getOwner().getEntityCollection();
        }

//      Rectangle2D.Double rect = null;
//      rect = new Rectangle2D.Double();
        RectangularShape rect = new Ellipse2D.Double();


        //turn off anti-aliasing when filling rectangles
        Object antiAlias = g2.getRenderingHint(RenderingHints.KEY_ANTIALIASING);
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, 
                RenderingHints.VALUE_ANTIALIAS_OFF);

        // if (tooltips!=null) tooltips.clearToolTips(); // reset collection
        // get the data points
        Number[] xNumber = data.getXValues();
        Number[] yNumber = data.getYValues();
        Number[] zNumber = data.getZValues();

        double[] x = new double[xNumber.length];
        double[] y = new double[yNumber.length];

        for (int i = 0; i < x.length; i++) {
            x[i] = xNumber[i].doubleValue();
            y[i] = yNumber[i].doubleValue();
        }

        double transX = 0.0;
        double transDX = 0.0;
        double transY = 0.0;
        double transDY = 0.0;
        double size = dataArea.getWidth() * this.ptSizePct;
        for (int k = 0; k < x.length; k++) {

            transX = domainAxis.valueToJava2D(x[k], dataArea, 
                    RectangleEdge.BOTTOM) - 0.5 * size;
            transY = rangeAxis.valueToJava2D(y[k], dataArea, RectangleEdge.LEFT)
                     - 0.5 * size;
            transDX = size;
            transDY = size;

            rect.setFrame(transX, transY, transDX, transDY);

            if (zNumber[k] != null) {
                g2.setPaint(colorBar.getPaint(zNumber[k].doubleValue()));
                g2.fill(rect);
            }
            else if (this.missingPaint != null) {
                g2.setPaint(this.missingPaint);
                g2.fill(rect);
            }


            entityArea = rect;

            // add an entity for the item...
            if (entities != null) {
                String tip = null;
                if (getToolTipGenerator() != null) {
                    tip = this.toolTipGenerator.generateToolTip(data, k);
                }
                String url = null;
                // if (getURLGenerator() != null) {   //dmo: look at this later
                //   url = getURLGenerator().generateURL(data, series, item);
                // }
                // Unlike XYItemRenderer, we need to clone entityArea since it 
                // reused.
                ContourEntity entity = new ContourEntity(
                        (RectangularShape) entityArea.clone(), tip, url);
                entity.setIndex(k);
                entities.add(entity);
            }

            // do we need to update the crosshair values?
            if (plot.isDomainCrosshairLockedOnData()) {
                if (plot.isRangeCrosshairLockedOnData()) {
                    // both axes
                    crosshairState.updateCrosshairPoint(x[k], y[k], transX, 
                            transY, PlotOrientation.VERTICAL);
                }
                else {
                    // just the horizontal axis...
                    crosshairState.updateCrosshairX(transX);
                }
            }
            else {
                if (plot.isRangeCrosshairLockedOnData()) {
                    // just the vertical axis...
                    crosshairState.updateCrosshairY(transY);
                }
            }
        }


        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, antiAlias);

        return;

    }

    /**
     * Utility method for drawing a crosshair on the chart (if required).
     *
     * @param g2  The graphics device.
     * @param dataArea  The data area.
     * @param value  The coordinate, where to draw the line.
     * @param stroke  The stroke to use.
     * @param paint  The paint to use.
     */
    protected void drawVerticalLine(Graphics2D g2, Rectangle2D dataArea,
                                    double value, Stroke stroke, Paint paint) {

        double xx = getDomainAxis().valueToJava2D(value, dataArea,