xylineandshaperenderer.java

提供JFreechart图表功能, 提供JFreechart图表功能,提供JFreechart图表功能

     * Sets the flag that controls whether outlines are drawn for 
     * shapes, and sends a {@link RendererChangeEvent} to all registered 
     * listeners. 
     * <P>
     * In some cases, shapes look better if they do NOT have an outline, but 
     * this flag allows you to set your own preference.
     * 
     * @param flag  the flag.
     * 
     * @see #getDrawOutlines()
     */
    public void setDrawOutlines(boolean flag) {
        this.drawOutlines = flag;
        fireChangeEvent();
    }
    
    /**
     * Returns <code>true</code> if the renderer should use the fill paint 
     * setting to fill shapes, and <code>false</code> if it should just
     * use the regular paint.
     * <p>
     * Refer to <code>XYLineAndShapeRendererDemo2.java</code> to see the
     * effect of this flag.
     * 
     * @return A boolean.
     * 
     * @see #setUseFillPaint(boolean)
     * @see #getUseOutlinePaint()
     */
    public boolean getUseFillPaint() {
        return this.useFillPaint;
    }
    
    /**
     * Sets the flag that controls whether the fill paint is used to fill 
     * shapes, and sends a {@link RendererChangeEvent} to all 
     * registered listeners.
     * 
     * @param flag  the flag.
     * 
     * @see #getUseFillPaint()
     */
    public void setUseFillPaint(boolean flag) {
        this.useFillPaint = flag;
        fireChangeEvent();
    }
    
    /**
     * Returns <code>true</code> if the renderer should use the outline paint 
     * setting to draw shape outlines, and <code>false</code> if it should just
     * use the regular paint.
     * 
     * @return A boolean.
     * 
     * @see #setUseOutlinePaint(boolean)
     * @see #getUseFillPaint()
     */
    public boolean getUseOutlinePaint() {
        return this.useOutlinePaint;
    }
    
    /**
     * Sets the flag that controls whether the outline paint is used to draw 
     * shape outlines, and sends a {@link RendererChangeEvent} to all 
     * registered listeners.
     * <p>
     * Refer to <code>XYLineAndShapeRendererDemo2.java</code> to see the
     * effect of this flag.
     * 
     * @param flag  the flag.
     * 
     * @see #getUseOutlinePaint()
     */
    public void setUseOutlinePaint(boolean flag) {
        this.useOutlinePaint = flag;
        fireChangeEvent();
    }
    
    /**
     * Records the state for the renderer.  This is used to preserve state 
     * information between calls to the drawItem() method for a single chart 
     * drawing.
     */
    public static class State extends XYItemRendererState {
        
        /** The path for the current series. */
        public GeneralPath seriesPath;
        
        /** 
         * A flag that indicates if the last (x, y) point was 'good' 
         * (non-null). 
         */
        private boolean lastPointGood;
        
        /**
         * Creates a new state instance.
         * 
         * @param info  the plot rendering info.
         */
        public State(PlotRenderingInfo info) {
            super(info);
        }
        
        /**
         * Returns a flag that indicates if the last point drawn (in the 
         * current series) was 'good' (non-null).
         * 
         * @return A boolean.
         */
        public boolean isLastPointGood() {
            return this.lastPointGood;
        }
        
        /**
         * Sets a flag that indicates if the last point drawn (in the current 
         * series) was 'good' (non-null).
         * 
         * @param good  the flag.
         */
        public void setLastPointGood(boolean good) {
            this.lastPointGood = good;
        }
    }
    
    /**
     * Initialises the renderer.
     * <P>
     * This method will be called before the first item is rendered, giving the
     * renderer an opportunity to initialise any state information it wants to 
     * maintain.  The renderer can do nothing if it chooses.
     *
     * @param g2  the graphics device.
     * @param dataArea  the area inside the axes.
     * @param plot  the plot.
     * @param data  the data.
     * @param info  an optional info collection object to return data back to 
     *              the caller.
     *
     * @return The renderer state.
     */
    public XYItemRendererState initialise(Graphics2D g2,
                                          Rectangle2D dataArea,
                                          XYPlot plot,
                                          XYDataset data,
                                          PlotRenderingInfo info) {

        State state = new State(info);
        state.seriesPath = new GeneralPath();
        return state;

    }
    
    /**
     * Draws the visual representation of a single data item.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @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 axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the dataset.
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     * @param crosshairState  crosshair information for the plot 
     *                        (<code>null</code> permitted).
     * @param pass  the pass index.
     */
    public void drawItem(Graphics2D g2,
                         XYItemRendererState state,
                         Rectangle2D dataArea,
                         PlotRenderingInfo info,
                         XYPlot plot,
                         ValueAxis domainAxis,
                         ValueAxis rangeAxis,
                         XYDataset dataset,
                         int series,
                         int item,
                         CrosshairState crosshairState,
                         int pass) {

        // do nothing if item is not visible
        if (!getItemVisible(series, item)) {
            return;   
        }

        // first pass draws the background (lines, for instance)
        if (isLinePass(pass)) {
            if (item == 0) {
                if (this.drawSeriesLineAsPath) {
                    State s = (State) state;
                    s.seriesPath.reset();
                    s.lastPointGood = false;     
                }
            }

            if (getItemLineVisible(series, item)) {
                if (this.drawSeriesLineAsPath) {
                    drawPrimaryLineAsPath(state, g2, plot, dataset, pass, 
                            series, item, domainAxis, rangeAxis, dataArea);
                }
                else {
                    drawPrimaryLine(state, g2, plot, dataset, pass, series, 
                            item, domainAxis, rangeAxis, dataArea);
                }
            }
        }
        // second pass adds shapes where the items are ..
        else if (isItemPass(pass)) {

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

            drawSecondaryPass(g2, plot, dataset, pass, series, item, 
                    domainAxis, dataArea, rangeAxis, crosshairState, entities);
        }
    }

    /**
     * Returns <code>true</code> if the specified pass is the one for drawing 
     * lines.
     * 
     * @param pass  the pass.
     * 
     * @return A boolean.
     */
    protected boolean isLinePass(int pass) {
        return pass == 0;
    }

    /**
     * Returns <code>true</code> if the specified pass is the one for drawing 
     * items.
     * 
     * @param pass  the pass.
     * 
     * @return A boolean.
     */
    protected boolean isItemPass(int pass) {
        return pass == 1;
    }

    /**
     * Draws the item (first pass). This method draws the lines
     * connecting the items.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the area within which the data is being drawn.
     * @param plot  the plot (can be used to obtain standard color 
     *              information etc).
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the dataset.
     * @param pass  the pass.
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     */
    protected void drawPrimaryLine(XYItemRendererState state,
                                   Graphics2D g2,
                                   XYPlot plot,
                                   XYDataset dataset,
                                   int pass,
                                   int series,
                                   int item,
                                   ValueAxis domainAxis,
                                   ValueAxis rangeAxis,
                                   Rectangle2D dataArea) {
        if (item == 0) {
            return;
        }

        // get the data point...
        double x1 = dataset.getXValue(series, item);
        double y1 = dataset.getYValue(series, item);
        if (Double.isNaN(y1) || Double.isNaN(x1)) {
            return;
        }

        double x0 = dataset.getXValue(series, item - 1);
        double y0 = dataset.getYValue(series, item - 1);
        if (Double.isNaN(y0) || Double.isNaN(x0)) {
            return;
        }

        RectangleEdge xAxisLocation = plot.getDomainAxisEdge();
        RectangleEdge yAxisLocation = plot.getRangeAxisEdge();

        double transX0 = domainAxis.valueToJava2D(x0, dataArea, xAxisLocation);
        double transY0 = rangeAxis.valueToJava2D(y0, dataArea, yAxisLocation);

        double transX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation);
        double transY1 = rangeAxis.valueToJava2D(y1, dataArea, yAxisLocation);

        // only draw if we have good values
        if (Double.isNaN(transX0) || Double.isNaN(transY0)
            || Double.isNaN(transX1) || Double.isNaN(transY1)) {
            return;
        }

        PlotOrientation orientation = plot.getOrientation();
        if (orientation == PlotOrientation.HORIZONTAL) {
            state.workingLine.setLine(transY0, transX0, transY1, transX1);
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            state.workingLine.setLine(transX0, transY0, transX1, transY1);
        }

        if (state.workingLine.intersects(dataArea)) {
            drawFirstPassShape(g2, pass, series, item, state.workingLine);
        }
    }

    /**
     * Draws the first pass shape.
     * 
     * @param g2  the graphics device.
     * @param pass  the pass.
     * @param series  the series index.
     * @param item  the item index.
     * @param shape  the shape.
     */
    protected void drawFirstPassShape(Graphics2D g2, int pass, int series,
                                      int item, Shape shape) {
        g2.setStroke(getItemStroke(series, item));
        g2.setPaint(getItemPaint(series, item));
        g2.draw(shape);
    }


    /**
     * Draws the item (first pass). This method draws the lines
     * connecting the items. Instead of drawing separate lines,
     * a GeneralPath is constructed and drawn at the end of
     * the series painting.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param plot  the plot (can be used to obtain standard color information