cyclicxyitemrenderer.java

这是一个segy数据显示程序

        }

        OverwriteDataSet newset = new OverwriteDataSet(x, y, dataset);

        if (cnax != null) {
            if (xcycleBound == x[0]) {
                cnax.setBoundMappedToLastCycle(x[1] <= xcycleBound);
            }
            if (xcycleBound == x[1]) {
                cnax.setBoundMappedToLastCycle(x[0] <= xcycleBound);
            }
        }
        if (cnay != null) {
            if (ycycleBound == y[0]) {
                cnay.setBoundMappedToLastCycle(y[1] <= ycycleBound);
            }
            if (ycycleBound == y[1]) {
                cnay.setBoundMappedToLastCycle(y[0] <= ycycleBound);
            }
        }
        super.drawItem(
            g2, state, dataArea, info, plot, domainAxis, rangeAxis, newset, series, 1, 
            crosshairState, pass
        );

        if (cnax != null) {
            if (xcycleBound == x[1]) {
                cnax.setBoundMappedToLastCycle(x[2] <= xcycleBound);
            }
            if (xcycleBound == x[2]) {
                cnax.setBoundMappedToLastCycle(x[1] <= xcycleBound);
            }
        }
        if (cnay != null) {
            if (ycycleBound == y[1]) {
                cnay.setBoundMappedToLastCycle(y[2] <= ycycleBound);
            }
            if (ycycleBound == y[2]) {
                cnay.setBoundMappedToLastCycle(y[1] <= ycycleBound);
            }
        }
        super.drawItem(
            g2, state, dataArea, info, plot, domainAxis, rangeAxis, newset, series, 2, 
            crosshairState, pass
        );

        if (x.length == 4) {
            if (cnax != null) {
                if (xcycleBound == x[2]) {
                    cnax.setBoundMappedToLastCycle(x[3] <= xcycleBound);
                }
                if (xcycleBound == x[3]) {
                    cnax.setBoundMappedToLastCycle(x[2] <= xcycleBound);
                }
            }
            if (cnay != null) {
                if (ycycleBound == y[2]) {
                    cnay.setBoundMappedToLastCycle(y[3] <= ycycleBound);
                }
                if (ycycleBound == y[3]) {
                    cnay.setBoundMappedToLastCycle(y[2] <= ycycleBound);
                }
            }
            super.drawItem(
                g2, state, dataArea, info, plot, domainAxis, rangeAxis, newset, 
                series, 3, crosshairState, pass
            );
        }
        
        if (cnax != null) {
            cnax.setBoundMappedToLastCycle(xBoundMapping);
        }
        if (cnay != null) {
            cnay.setBoundMappedToLastCycle(yBoundMapping);
        }
    }

    /** 
     * A dataset to hold the interpolated points when drawing new lines. 
     */
    protected static class OverwriteDataSet implements XYDataset {
        
        /** The delegate dataset. */
        protected XYDataset delegateSet;
        
        /** Storage for the x and y values. */
        Double[] x, y;
        
        /**
         * Creates a new dataset.
         * 
         * @param x  the x values.
         * @param y  the y values.
         * @param delegateSet  the dataset.
         */
        public OverwriteDataSet(double [] x, double[] y, XYDataset delegateSet) {
            this.delegateSet = delegateSet;
            this.x = new Double[x.length]; this.y = new Double[y.length];
            for (int i = 0; i < x.length; ++i) { 
                this.x[i] = new Double(x[i]);
                this.y[i] = new Double(y[i]);
            }
        }

        /**
         * Returns the number of items for the given series.
         * 
         * @param series  the series index (zero-based).
         * 
         * @return The item count.
         */
        public int getItemCount(int series) {
            return this.x.length;
        }

        /**
         * Returns the x-value.
         * 
         * @param series  the series index (zero-based).
         * @param item  the item index (zero-based).
         * 
         * @return the x-value.
         */
        public Number getXValue(int series, int item) {
            return this.x[item];
        }

        /**
         * Returns the x-value (as a double primitive) for an item within a series.
         * 
         * @param series  the series (zero-based index).
         * @param item  the item (zero-based index).
         * 
         * @return The x-value.
         */
        public double getX(int series, int item) {
            double result = Double.NaN;
            Number x = getXValue(series, item);
            if (x != null) {
                result = x.doubleValue();   
            }
            return result;   
        }

        /**
         * Returns the y-value.
         * 
         * @param series  the series index (zero-based).
         * @param item  the item index (zero-based).
         * 
         * @return the y-value.
         */
        public Number getYValue(int series, int item) {
            return this.y[item];
        }

        /**
         * Returns the y-value (as a double primitive) for an item within a series.
         * 
         * @param series  the series (zero-based index).
         * @param item  the item (zero-based index).
         * 
         * @return The y-value.
         */
        public double getY(int series, int item) {
            double result = Double.NaN;
            Number y = getYValue(series, item);
            if (y != null) {
                result = y.doubleValue();   
            }
            return result;   
        }

        /**
         * Returns the number of series in the dataset.
         * 
         * @return the series count.
         */
        public int getSeriesCount() {
            return this.delegateSet.getSeriesCount();
        }

        /**
         * Returns the name of the given series.
         * 
         * @param series  the series index (zero-based).
         * 
         * @return The series name.
         */
        public String getSeriesName(int series) {
            return this.delegateSet.getSeriesName(series);
        }

        /**
         * Does nothing.
         * 
         * @param listener  ignored.
         */
        public void addChangeListener(DatasetChangeListener listener) {
            // unused in parent
        }

        /**
         * Does nothing.
         * 
         * @param listener  ignored.
         */
        public void removeChangeListener(DatasetChangeListener listener) {
            // unused in parent
        }

        /**
         * Returns the dataset group.
         * 
         * @return the dataset group.
         */
        public DatasetGroup getGroup() {
            // unused but must return something, so while we are at it...
            return this.delegateSet.getGroup();
        }

        /**
         * Does nothing.
         * 
         * @param group  ignored.
         */
        public void setGroup(DatasetGroup group) {
            // unused in parent
        }
        
    }
    
}