chartcomposite.java

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

     * @param style The style of the composite.
     */
    public ChartComposite(Composite comp, int style) {
        this(comp, 
                style,
                null,
                DEFAULT_WIDTH,
                DEFAULT_HEIGHT,
                DEFAULT_MINIMUM_DRAW_WIDTH,
                DEFAULT_MINIMUM_DRAW_HEIGHT,
                DEFAULT_MAXIMUM_DRAW_WIDTH,
                DEFAULT_MAXIMUM_DRAW_HEIGHT,
                DEFAULT_BUFFER_USED,
                true,  // properties
                true,  // save
                true,  // print
                true,  // zoom
                true   // tooltips
        );
    }

    /**
     * Constructs a panel that displays the specified chart.
     *
     * @param comp The parent.
     * @param style The style of the composite.
     * @param chart  the chart.
     */
    public ChartComposite(Composite comp, int style, JFreeChart chart) {
        this( 
                comp, 
                style,
                chart,
                DEFAULT_WIDTH,
                DEFAULT_HEIGHT,
                DEFAULT_MINIMUM_DRAW_WIDTH,
                DEFAULT_MINIMUM_DRAW_HEIGHT,
                DEFAULT_MAXIMUM_DRAW_WIDTH,
                DEFAULT_MAXIMUM_DRAW_HEIGHT,
                DEFAULT_BUFFER_USED,
                true,  // properties
                true,  // save
                true,  // print
                true,  // zoom
                true   // tooltips
        );
    }

    /**
     * Constructs a panel containing a chart.
     *
     * @param comp The parent.
     * @param style The style of the composite.
     * @param chart  the chart.
     * @param useBuffer  a flag controlling whether or not an off-screen buffer
     *                   is used.
     */
    public ChartComposite(Composite comp, int style, JFreeChart chart, 
            boolean useBuffer) {
        
        this(comp, style, chart,
                DEFAULT_WIDTH,
                DEFAULT_HEIGHT,
                DEFAULT_MINIMUM_DRAW_WIDTH,
                DEFAULT_MINIMUM_DRAW_HEIGHT,
                DEFAULT_MAXIMUM_DRAW_WIDTH,
                DEFAULT_MAXIMUM_DRAW_HEIGHT,
                useBuffer,
                true,  // properties
                true,  // save
                true,  // print
                true,  // zoom
                true   // tooltips
                );
    }
    
    /**
     * Constructs a JFreeChart panel.
     *
     * @param comp The parent.
     * @param style The style of the composite.
     * @param chart  the chart.
     * @param properties  a flag indicating whether or not the chart property
     *                    editor should be available via the popup menu.
     * @param save  a flag indicating whether or not save options should be
     *              available via the popup menu.
     * @param print  a flag indicating whether or not the print option
     *               should be available via the popup menu.
     * @param zoom  a flag indicating whether or not zoom options should
     *              be added to the popup menu.
     * @param tooltips  a flag indicating whether or not tooltips should be
     *                  enabled for the chart.
     */
    public ChartComposite(
            Composite comp, 
            int style,
            JFreeChart chart,
            boolean properties,
            boolean save,
            boolean print,
            boolean zoom,
            boolean tooltips) {
        this(
                comp,
                style,
                chart,
                DEFAULT_WIDTH,
                DEFAULT_HEIGHT,
                DEFAULT_MINIMUM_DRAW_WIDTH,
                DEFAULT_MINIMUM_DRAW_HEIGHT,
                DEFAULT_MAXIMUM_DRAW_WIDTH,
                DEFAULT_MAXIMUM_DRAW_HEIGHT,
                DEFAULT_BUFFER_USED,
                properties,
                save,
                print,
                zoom,
                tooltips
                );
    }

    /**
     * Constructs a JFreeChart panel.
     *
     * @param comp The parent.
     * @param style The style of the composite.
     * @param jfreechart  the chart.
     * @param width  the preferred width of the panel.
     * @param height  the preferred height of the panel.
     * @param minimumDrawW  the minimum drawing width.
     * @param minimumDrawH  the minimum drawing height.
     * @param maximumDrawW  the maximum drawing width.
     * @param maximumDrawH  the maximum drawing height.
     * @param usingBuffer  a flag that indicates whether to use the off-screen
     *                   buffer to improve performance (at the expense of 
     *                   memory).
     * @param properties  a flag indicating whether or not the chart property
     *                    editor should be available via the popup menu.
     * @param save  a flag indicating whether or not save options should be
     *              available via the popup menu.
     * @param print  a flag indicating whether or not the print option
     *               should be available via the popup menu.
     * @param zoom  a flag indicating whether or not zoom options should be 
     *              added to the popup menu.
     * @param tooltips  a flag indicating whether or not tooltips should be 
     *                  enabled for the chart.
     */
    public ChartComposite(Composite comp, 
            int style,
            JFreeChart jfreechart,
            int width,
            int height,
            int minimumDrawW,
            int minimumDrawH,
            int maximumDrawW,
            int maximumDrawH,
            boolean usingBuffer,
            boolean properties,
            boolean save,
            boolean print,
            boolean zoom,
            boolean tooltips) {
        super(comp, style);
        this.setChart(jfreechart);
        this.chartMouseListeners = new EventListenerList();
        this.setLayout(new FillLayout());
        this.info = new ChartRenderingInfo();
        this.useBuffer = usingBuffer;
        this.refreshBuffer = false;
        this.minimumDrawWidth = minimumDrawW;
        this.minimumDrawHeight = minimumDrawH;
        this.maximumDrawWidth = maximumDrawW;
        this.maximumDrawHeight = maximumDrawH;
        this.zoomTriggerDistance = DEFAULT_ZOOM_TRIGGER_DISTANCE;
        this.setDisplayToolTips(tooltips);
        // create the canvas and add the required listeners
        this.canvas = new Canvas(this, SWT.DOUBLE_BUFFERED | SWT.NO_BACKGROUND);
        this.canvas.addPaintListener(this);
        this.canvas.addMouseListener(this);
        this.canvas.addMouseMoveListener(this);
            
        if (this.chart != null) {
            this.chart.addChangeListener(this);
            Plot plot = this.chart.getPlot();
            this.domainZoomable = false;
            this.rangeZoomable = false;
            if (plot instanceof Zoomable) {
                Zoomable z = (Zoomable) plot;
                this.domainZoomable = z.isDomainZoomable();
                this.rangeZoomable = z.isRangeZoomable();
                this.orientation = z.getOrientation();
            }
        }

        // set up popup menu...
        this.popup = null;
        if (properties || save || print || zoom)
            this.popup = createPopupMenu(properties, save, print, zoom);

        this.enforceFileExtensions = true;
    }
        
    /**
     * Returns the X scale factor for the chart.  This will be 1.0 if no 
     * scaling has been used.
     * 
     * @return The scale factor.
     */
    public double getScaleX() {
        return this.scaleX;
    }
    
    /**
     * Returns the Y scale factory for the chart.  This will be 1.0 if no 
     * scaling has been used.
     * 
     * @return The scale factor.
     */
    public double getScaleY() {
        return this.scaleY;
    }
    
    /**
     * Returns the anchor point.
     * 
     * @return The anchor point (possibly <code>null</code>).
     */
    public Point2D getAnchor() {
        return this.anchor;   
    }
    
    /**
     * Sets the anchor point.  This method is provided for the use of 
     * subclasses, not end users.
     * 
     * @param anchor  the anchor point (<code>null</code> permitted).
     */
    protected void setAnchor(Point2D anchor) {
        this.anchor = anchor;   
    }

    /**
     * Returns the chart contained in the panel.
     *
     * @return The chart (possibly <code>null</code>).
     */
    public JFreeChart getChart() {
        return this.chart;
    }

    /**
     * Sets the chart that is displayed in the panel.
     *
     * @param chart  the chart (<code>null</code> permitted).
     */
    public void setChart(JFreeChart chart) {
        // stop listening for changes to the existing chart
        if (this.chart != null) {
            this.chart.removeChangeListener(this);
            this.chart.removeProgressListener(this);
        }

        // add the new chart
        this.chart = chart;
        if (chart != null) {
            this.chart.addChangeListener(this);
            this.chart.addProgressListener(this);
            Plot plot = chart.getPlot();
            this.domainZoomable = false;
            this.rangeZoomable = false;
            if (plot instanceof Zoomable) {
                Zoomable z = (Zoomable) plot;
                this.domainZoomable = z.isDomainZoomable();
                this.rangeZoomable = z.isRangeZoomable();
                this.orientation = z.getOrientation();
            }
        }
        else {
            this.domainZoomable = false;
            this.rangeZoomable = false;
        }
        if (this.useBuffer) {
            this.refreshBuffer = true;
        }
    }

    /**
     * Returns the chart rendering info from the most recent chart redraw.
     *
     * @return The chart rendering info (possibly <code>null</code>).
     */
    public ChartRenderingInfo getChartRenderingInfo() {
        return this.info;
    }
    
    /**
     * Returns the flag that determines whether or not zooming is enabled for 
     * the domain axis.
     * 
     * @return A boolean.
     */
    public boolean isDomainZoomable() {
        return this.domainZoomable;
    }
    
    /**
     * Sets the flag that controls whether or not zooming is enable for the 
     * domain axis.  A check is made to ensure that the current plot supports
     * zooming for the domain values.
     *
     * @param flag  <code>true</code> enables zooming if possible.
     */
    public void setDomainZoomable(boolean flag) {
        if (flag) {
            Plot plot = this.chart.getPlot();
            if (plot instanceof Zoomable) {
                Zoomable z = (Zoomable) plot;
                this.domainZoomable = flag && (z.isDomainZoomable());  
            }
        }
        else {
            this.domainZoomable = false;
        }
    }

    /**
     * Returns the flag that determines whether or not zooming is enabled for 
     * the range axis.
     * 
     * @return A boolean.
     */
    public boolean isRangeZoomable() {
        return this.rangeZoomable;
    }
    
    /**
     * A flag that controls mouse-based zooming on the vertical axis.
     *
     * @param flag  <code>true</code> enables zooming.
     */
    public void setRangeZoomable(boolean flag) {
        if (flag) {
            Plot plot = this.chart.getPlot();
            if (plot instanceof Zoomable) {
                Zoomable z = (Zoomable) plot;
                this.rangeZoomable = flag && (z.isRangeZoomable());  
            }
        }
        else {
            this.rangeZoomable = false;
        }
    }

    /**
     * Returns the zoom in factor.