linerenderer3d.java

java图形利器

     * @param value  the Java2D value at which the grid line should be drawn.
     *
     */
    public void drawDomainGridline(Graphics2D g2,
                                   CategoryPlot plot,
                                   Rectangle2D dataArea,
                                   double value) {

        Line2D line1 = null;
        Line2D line2 = null;
        PlotOrientation orientation = plot.getOrientation();
        if (orientation == PlotOrientation.HORIZONTAL) {
            double y0 = value;
            double y1 = value - getYOffset();
            double x0 = dataArea.getMinX();
            double x1 = x0 + getXOffset();
            double x2 = dataArea.getMaxX();
            line1 = new Line2D.Double(x0, y0, x1, y1);
            line2 = new Line2D.Double(x1, y1, x2, y1);
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            double x0 = value;
            double x1 = value + getXOffset();
            double y0 = dataArea.getMaxY();
            double y1 = y0 - getYOffset();
            double y2 = dataArea.getMinY();
            line1 = new Line2D.Double(x0, y0, x1, y1);
            line2 = new Line2D.Double(x1, y1, x1, y2);
        }
        g2.setPaint(plot.getDomainGridlinePaint());
        g2.setStroke(plot.getDomainGridlineStroke());
        g2.draw(line1);
        g2.draw(line2);

    }

    /**
     * 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 drawRangeGridline(Graphics2D g2,
                                  CategoryPlot plot,
                                  ValueAxis axis,
                                  Rectangle2D dataArea,
                                  double value) {

        Range range = axis.getRange();

        if (!range.contains(value)) {
            return;
        }

        Rectangle2D adjusted = new Rectangle2D.Double(dataArea.getX(),
                dataArea.getY() + getYOffset(),
                dataArea.getWidth() - getXOffset(),
                dataArea.getHeight() - getYOffset());

        Line2D line1 = null;
        Line2D line2 = null;
        PlotOrientation orientation = plot.getOrientation();
        if (orientation == PlotOrientation.HORIZONTAL) {
            double x0 = axis.valueToJava2D(value, adjusted, 
                    plot.getRangeAxisEdge());
            double x1 = x0 + getXOffset();
            double y0 = dataArea.getMaxY();
            double y1 = y0 - getYOffset();
            double y2 = dataArea.getMinY();
            line1 = new Line2D.Double(x0, y0, x1, y1);
            line2 = new Line2D.Double(x1, y1, x1, y2);
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            double y0 = axis.valueToJava2D(value, adjusted,
                    plot.getRangeAxisEdge());
            double y1 = y0 - getYOffset();
            double x0 = dataArea.getMinX();
            double x1 = x0 + getXOffset();
            double x2 = dataArea.getMaxX();
            line1 = new Line2D.Double(x0, y0, x1, y1);
            line2 = new Line2D.Double(x1, y1, x2, y1);
        }
        g2.setPaint(plot.getRangeGridlinePaint());
        g2.setStroke(plot.getRangeGridlineStroke());
        g2.draw(line1);
        g2.draw(line2);

    }

    /**
     * Draws a range marker.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param axis  the value axis.
     * @param marker  the marker.
     * @param dataArea  the area for plotting data (not including 3D effect).
     */
    public void drawRangeMarker(Graphics2D g2,
                                CategoryPlot plot,
                                ValueAxis axis,
                                Marker marker,
                                Rectangle2D dataArea) {

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

            Rectangle2D adjusted = new Rectangle2D.Double(dataArea.getX(), 
                    dataArea.getY() + getYOffset(), 
                    dataArea.getWidth() - getXOffset(), 
                    dataArea.getHeight() - getYOffset());

            GeneralPath path = null;
            PlotOrientation orientation = plot.getOrientation();
            if (orientation == PlotOrientation.HORIZONTAL) {
                float x = (float) axis.valueToJava2D(value, adjusted, 
                        plot.getRangeAxisEdge());
                float y = (float) adjusted.getMaxY();
                path = new GeneralPath();
                path.moveTo(x, y);
                path.lineTo((float) (x + getXOffset()), 
                        y - (float) getYOffset());
                path.lineTo((float) (x + getXOffset()), 
                        (float) (adjusted.getMinY() - getYOffset()));
                path.lineTo(x, (float) adjusted.getMinY());
                path.closePath();
            }
            else if (orientation == PlotOrientation.VERTICAL) {
                float y = (float) axis.valueToJava2D(value, adjusted, 
                        plot.getRangeAxisEdge());
                float x = (float) dataArea.getX();
                path = new GeneralPath();
                path.moveTo(x, y);
                path.lineTo(x + (float) this.xOffset, y - (float) this.yOffset);
                path.lineTo((float) (adjusted.getMaxX() + this.xOffset), 
                        y - (float) this.yOffset);
                path.lineTo((float) (adjusted.getMaxX()), y);
                path.closePath();
            }
            g2.setPaint(marker.getPaint());
            g2.fill(path);
            g2.setPaint(marker.getOutlinePaint());
            g2.draw(path);
        }
    }
   
   /**
     * Draw a single data item.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the area in which the data is drawn.
     * @param plot  the plot.
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the dataset.
     * @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 dataset,
                         int row,
                         int column,
                         int pass) {

        if (!getItemVisible(row, column)) {
            return;   
        }
        
        // nothing is drawn for null...
        Number v = dataset.getValue(row, column);
        if (v == null) {
            return;
        }
       
        Rectangle2D adjusted = new Rectangle2D.Double(dataArea.getX(),
                dataArea.getY() + getYOffset(), 
                dataArea.getWidth() - getXOffset(),
                dataArea.getHeight() - getYOffset());
       
        PlotOrientation orientation = plot.getOrientation();

        // current data point...
        double x1 = domainAxis.getCategoryMiddle(column, getColumnCount(), 
                adjusted, plot.getDomainAxisEdge());
        double value = v.doubleValue();
        double y1 = rangeAxis.valueToJava2D(value, adjusted, 
                plot.getRangeAxisEdge());

        Shape shape = getItemShape(row, column);
        if (orientation == PlotOrientation.HORIZONTAL) {
            shape = ShapeUtilities.createTranslatedShape(shape, y1, x1);
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            shape = ShapeUtilities.createTranslatedShape(shape, x1, y1);
        }
       
        if (getItemLineVisible(row, column)) {
            if (column != 0) {

                Number previousValue = dataset.getValue(row, column - 1);
                if (previousValue != null) {

                    // previous data point...
                    double previous = previousValue.doubleValue();
                    double x0 = domainAxis.getCategoryMiddle(column - 1, 
                            getColumnCount(), adjusted, 
                            plot.getDomainAxisEdge());
                    double y0 = rangeAxis.valueToJava2D(previous, adjusted, 
                            plot.getRangeAxisEdge());

                    double x2 = x0 + getXOffset();
                    double y2 = y0 - getYOffset();
                    double x3 = x1 + getXOffset();
                    double y3 = y1 - getYOffset();
                   
                    GeneralPath clip = new GeneralPath();
                   
                    if (orientation == PlotOrientation.HORIZONTAL) {
                        clip.moveTo((float) y0, (float) x0);
                        clip.lineTo((float) y1, (float) x1);
                        clip.lineTo((float) y3, (float) x3);
                        clip.lineTo((float) y2, (float) x2);
                        clip.lineTo((float) y0, (float) x0);
                        clip.closePath();
                    }
                    else if (orientation == PlotOrientation.VERTICAL) {
                        clip.moveTo((float) x0, (float) y0);
                        clip.lineTo((float) x1, (float) y1);
                        clip.lineTo((float) x3, (float) y3);
                        clip.lineTo((float) x2, (float) y2);
                        clip.lineTo((float) x0, (float) y0);
                        clip.closePath();
                    }
                   
                    g2.setPaint(getItemPaint(row, column));
                    g2.fill(clip);
                    g2.setStroke(getItemOutlineStroke(row, column));
                    g2.setPaint(getItemOutlinePaint(row, column));
                    g2.draw(clip);
                }
            }
        }

        // draw the item label if there is one...
        if (isItemLabelVisible(row, column)) {
            drawItemLabel(g2, orientation, dataset, row, column, x1, y1, 
                    (value < 0.0));
        }

        // add an item entity, if this information is being collected
        EntityCollection entities = state.getEntityCollection();
        if (entities != null) {
            addItemEntity(entities, dataset, row, column, shape);
        }

    }
    
    /**
     * Checks this renderer for equality with an arbitrary object.
     * 
     * @param obj  the object (<code>null</code> permitted).
     * 
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof LineRenderer3D)) {
            return false;
        }
        LineRenderer3D that = (LineRenderer3D) obj;
        if (this.xOffset != that.xOffset) {
            return false;
        }
        if (this.yOffset != that.yOffset) {
            return false;
        }
        if (!PaintUtilities.equal(this.wallPaint, that.wallPaint)) {
            return false;
        }
        return super.equals(obj);
    }
    
    /**
     * Provides serialization support.
     *
     * @param stream  the output stream.
     *
     * @throws IOException  if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writePaint(this.wallPaint, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream.
     *
     * @throws IOException  if there is an I/O error.
     * @throws ClassNotFoundException  if there is a classpath problem.
     */
    private void readObject(ObjectInputStream stream)
            throws IOException, ClassNotFoundException {
        stream.defaultReadObject();
        this.wallPaint = SerialUtilities.readPaint(stream);
    }

}