categoryplot.java

java图形利器

        CategoryDataset result = null;
        if (this.datasets.size() > index) {
            result = (CategoryDataset) this.datasets.get(index);
        }
        return result;
    }

    /**
     * Sets the dataset for the plot, replacing the existing dataset, if there 
     * is one.  This method also calls the 
     * {@link #datasetChanged(DatasetChangeEvent)} method, which adjusts the 
     * axis ranges if necessary and sends a {@link PlotChangeEvent} to all 
     * registered listeners.
     *
     * @param dataset  the dataset (<code>null</code> permitted).
     * 
     * @see #getDataset()
     */
    public void setDataset(CategoryDataset dataset) {
        setDataset(0, dataset);
    }

    /**
     * Sets a dataset for the plot.
     *
     * @param index  the dataset index.
     * @param dataset  the dataset (<code>null</code> permitted).
     * 
     * @see #getDataset(int)
     */
    public void setDataset(int index, CategoryDataset dataset) {
        
        CategoryDataset existing = (CategoryDataset) this.datasets.get(index);
        if (existing != null) {
            existing.removeChangeListener(this);
        }
        this.datasets.set(index, dataset);
        if (dataset != null) {
            dataset.addChangeListener(this);
        }
        
        // send a dataset change event to self...
        DatasetChangeEvent event = new DatasetChangeEvent(this, dataset);
        datasetChanged(event);
        
    }

    /**
     * Returns the number of datasets.
     *
     * @return The number of datasets.
     * 
     * @since 1.0.2
     */
    public int getDatasetCount() {
        return this.datasets.size();
    }

    /**
     * Maps a dataset to a particular domain axis.
     * 
     * @param index  the dataset index (zero-based).
     * @param axisIndex  the axis index (zero-based).
     * 
     * @see #getDomainAxisForDataset(int)
     */
    public void mapDatasetToDomainAxis(int index, int axisIndex) {
        this.datasetToDomainAxisMap.set(index, new Integer(axisIndex));  
        // fake a dataset change event to update axes...
        datasetChanged(new DatasetChangeEvent(this, getDataset(index)));  
    }

    /**
     * Returns the domain axis for a dataset.  You can change the axis for a 
     * dataset using the {@link #mapDatasetToDomainAxis(int, int)} method.
     * 
     * @param index  the dataset index.
     * 
     * @return The domain axis.
     * 
     * @see #mapDatasetToDomainAxis(int, int)
     */
    public CategoryAxis getDomainAxisForDataset(int index) {
        CategoryAxis result = getDomainAxis();
        Integer axisIndex = (Integer) this.datasetToDomainAxisMap.get(index);
        if (axisIndex != null) {
            result = getDomainAxis(axisIndex.intValue());
        }
        return result;    
    }
    
    /**
     * Maps a dataset to a particular range axis.
     * 
     * @param index  the dataset index (zero-based).
     * @param axisIndex  the axis index (zero-based).
     * 
     * @see #getRangeAxisForDataset(int)
     */
    public void mapDatasetToRangeAxis(int index, int axisIndex) {
        this.datasetToRangeAxisMap.set(index, new Integer(axisIndex));
        // fake a dataset change event to update axes...
        datasetChanged(new DatasetChangeEvent(this, getDataset(index)));  
    }

    /**
     * Returns the range axis for a dataset.  You can change the axis for a 
     * dataset using the {@link #mapDatasetToRangeAxis(int, int)} method.
     * 
     * @param index  the dataset index.
     * 
     * @return The range axis.
     * 
     * @see #mapDatasetToRangeAxis(int, int)
     */
    public ValueAxis getRangeAxisForDataset(int index) {
        ValueAxis result = getRangeAxis();
        Integer axisIndex = (Integer) this.datasetToRangeAxisMap.get(index);
        if (axisIndex != null) {
            result = getRangeAxis(axisIndex.intValue());
        }
        return result;    
    }
    
    /**
     * Returns a reference to the renderer for the plot.
     *
     * @return The renderer.
     * 
     * @see #setRenderer(CategoryItemRenderer)
     */
    public CategoryItemRenderer getRenderer() {
        return getRenderer(0);
    }

    /**
     * Returns the renderer at the given index.
     *
     * @param index  the renderer index.
     *
     * @return The renderer (possibly <code>null</code>).
     * 
     * @see #setRenderer(int, CategoryItemRenderer)
     */
    public CategoryItemRenderer getRenderer(int index) {
        CategoryItemRenderer result = null;
        if (this.renderers.size() > index) {
            result = (CategoryItemRenderer) this.renderers.get(index);
        }
        return result;
    }
    
    /**
     * Sets the renderer at index 0 (sometimes referred to as the "primary" 
     * renderer) and sends a {@link PlotChangeEvent} to all registered 
     * listeners.
     *
     * @param renderer  the renderer (<code>null</code> permitted.
     * 
     * @see #getRenderer()
     */
    public void setRenderer(CategoryItemRenderer renderer) {
        setRenderer(0, renderer, true);
    }

    /**
     * Sets the renderer at index 0 (sometimes referred to as the "primary" 
     * renderer) and, if requested, sends a {@link PlotChangeEvent} to all 
     * registered listeners.
     * <p>
     * You can set the renderer to <code>null</code>, but this is not 
     * recommended because:
     * <ul>
     *   <li>no data will be displayed;</li>
     *   <li>the plot background will not be painted;</li>
     * </ul>
     *
     * @param renderer  the renderer (<code>null</code> permitted).
     * @param notify  notify listeners?
     * 
     * @see #getRenderer()
     */
    public void setRenderer(CategoryItemRenderer renderer, boolean notify) {
        setRenderer(0, renderer, notify);
    }

    /**
     * Sets the renderer at the specified index and sends a 
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param index  the index.
     * @param renderer  the renderer (<code>null</code> permitted).
     * 
     * @see #getRenderer(int)
     * @see #setRenderer(int, CategoryItemRenderer, boolean)
     */
    public void setRenderer(int index, CategoryItemRenderer renderer) {
        setRenderer(index, renderer, true);   
    }

    /**
     * Sets a renderer.  A {@link PlotChangeEvent} is sent to all registered 
     * listeners.
     *
     * @param index  the index.
     * @param renderer  the renderer (<code>null</code> permitted).
     * @param notify  notify listeners?
     * 
     * @see #getRenderer(int)
     */
    public void setRenderer(int index, CategoryItemRenderer renderer, 
                            boolean notify) {
        
        // stop listening to the existing renderer...
        CategoryItemRenderer existing 
            = (CategoryItemRenderer) this.renderers.get(index);
        if (existing != null) {
            existing.removeChangeListener(this);
        }
        
        // register the new renderer...
        this.renderers.set(index, renderer);
        if (renderer != null) {
            renderer.setPlot(this);
            renderer.addChangeListener(this);
        }
        
        configureDomainAxes();
        configureRangeAxes();
        
        if (notify) {
            notifyListeners(new PlotChangeEvent(this));
        }
    }

    /**
     * Sets the renderers for this plot and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     * 
     * @param renderers  the renderers.
     */
    public void setRenderers(CategoryItemRenderer[] renderers) {
        for (int i = 0; i < renderers.length; i++) {
            setRenderer(i, renderers[i], false);   
        }
        notifyListeners(new PlotChangeEvent(this));
    }
    
    /**
     * Returns the renderer for the specified dataset.  If the dataset doesn't
     * belong to the plot, this method will return <code>null</code>.
     * 
     * @param dataset  the dataset (<code>null</code> permitted).
     * 
     * @return The renderer (possibly <code>null</code>).
     */
    public CategoryItemRenderer getRendererForDataset(CategoryDataset dataset) {
        CategoryItemRenderer result = null;
        for (int i = 0; i < this.datasets.size(); i++) {
            if (this.datasets.get(i) == dataset) {
                result = (CategoryItemRenderer) this.renderers.get(i);   
                break;
            }
        }
        return result;
    }
    
    /**
     * Returns the index of the specified renderer, or <code>-1</code> if the
     * renderer is not assigned to this plot.
     * 
     * @param renderer  the renderer (<code>null</code> permitted).
     * 
     * @return The renderer index.
     */
    public int getIndexOf(CategoryItemRenderer renderer) {
        return this.renderers.indexOf(renderer);
    }

    /**
     * Returns the dataset rendering order.
     *
     * @return The order (never <code>null</code>).
     * 
     * @see #setDatasetRenderingOrder(DatasetRenderingOrder)
     */
    public DatasetRenderingOrder getDatasetRenderingOrder() {
        return this.renderingOrder;
    }

    /**
     * Sets the rendering order and sends a {@link PlotChangeEvent} to all 
     * registered listeners.  By default, the plot renders the primary dataset 
     * last (so that the primary dataset overlays the secondary datasets).  You 
     * can reverse this if you want to.
     *
     * @param order  the rendering order (<code>null</code> not permitted).
     * 
     * @see #getDatasetRenderingOrder()
     */
    public void setDatasetRenderingOrder(DatasetRenderingOrder order) {
        if (order == null) {
            throw new IllegalArgumentException("Null 'order' argument.");   
        }
        this.renderingOrder = order;
        notifyListeners(new PlotChangeEvent(this));
    }

    /**
     * Returns the order in which the columns are rendered.  The default value
     * is <code>SortOrder.ASCENDING</code>.
     * 
     * @return The column rendering order (never <code>null</code).
     * 
     * @see #setColumnRenderingOrder(SortOrder)
     */    
    public SortOrder getColumnRenderingOrder() {
        return this.columnRenderingOrder;
    }
    
    /**
     * Sets the column order in which the items in each dataset should be 
     * rendered and sends a {@link PlotChangeEvent} to all registered 
     * listeners.  Note that this affects the order in which items are drawn, 
     * NOT their position in the chart.
     * 
     * @param order  the order (<code>null</code> not permitted).
     * 
     * @see #getColumnRenderingOrder()
     * @see #setRowRenderingOrder(SortOrder)
     */
    public void setColumnRenderingOrder(SortOrder order) {
        if (order == null) {
            throw new IllegalArgumentException("Null 'order' argument.");
        }
        this.columnRenderingOrder = order;
        notifyListeners(new PlotChangeEvent(this));
    }
    
    /**
     * Returns the order in which the rows should be rendered.  The default 
     * value is <code>SortOrder.ASCENDING</code>.
     * 
     * @return The order (never <code>null</code>).
     * 
     * @see #setRowRenderingOrder(SortOrder)
     */
    public SortOrder getRowRenderingOrder() {
        return this.rowRenderingOrder;
    }

    /**
     * Sets the row order in which the items in each dataset should be 
     * rendered and sends a {@link PlotChangeEvent} to all registered 
     * listeners.  Note that this affects the order in which items are drawn, 
     * NOT their position in the chart.
     * 
     * @param order  the order (<code>null</code> not permitted).
     * 
     * @see #getRowRenderingOrder()
     * @see #setColumnRenderingOrder(SortOrder)
     */
    public void setRowRenderingOrder(SortOrder order) {
        if (order == null) {
            throw new IllegalArgumentException("Null 'order' argument.");
        }
        this.rowRenderingOrder = order;
        notifyListeners(new PlotChangeEvent(this));
    }
    
    /**
     * Returns the flag that controls whether the domain grid-lines are visible.
     *
     * @return The <code>true</code> or <code>false</code>.
     * 
     * @see #setDomainGridlinesVisible(boolean)
     */