chartcomposite.java

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

        int x = (int) Math.round(rect.getX() * getScaleX()) + insets.x;
        int y = (int) Math.round(rect.getY() * this.getScaleY()) + insets.y;
        int w = (int) Math.round(rect.getWidth() * this.getScaleX());
        int h = (int) Math.round(rect.getHeight() * this.getScaleY());
        return new Rectangle(x, y, w, h);
    }

    /**
     * Returns the data area for the chart (the area inside the axes) with the
     * current scaling applied (that is, the area as it appears on screen).
     *
     * @return The scaled data area.
     */
    public Rectangle getScreenDataArea() {
        Rectangle2D dataArea = this.info.getPlotInfo().getDataArea();
        Rectangle clientArea = this.getClientArea();
        int x = (int) (dataArea.getX() * this.scaleX + clientArea.x);
        int y = (int) (dataArea.getY() * this.scaleY + clientArea.y);
        int w = (int) (dataArea.getWidth() * this.scaleX);
        int h = (int) (dataArea.getHeight() * this.scaleY);
        return new Rectangle(x, y, w, h);
    }
    
    /**
     * Returns the data area (the area inside the axes) for the plot or subplot,
     * with the current scaling applied.
     *
     * @param x  the x-coordinate (for subplot selection).
     * @param y  the y-coordinate (for subplot selection).
     * 
     * @return The scaled data area.
     */
    public Rectangle getScreenDataArea(int x, int y) {
        PlotRenderingInfo plotInfo = this.info.getPlotInfo();
        Rectangle result;
        if (plotInfo.getSubplotCount() == 0)
            result = getScreenDataArea();
        else {
            // get the origin of the zoom selection in the Java2D space used for
            // drawing the chart (that is, before any scaling to fit the panel)
            Point2D selectOrigin = translateScreenToJava2D(new Point(x, y));
            int subplotIndex = plotInfo.getSubplotIndex(selectOrigin);
            if (subplotIndex == -1) {
                return null;
            }
            result = scale(plotInfo.getSubplotInfo(subplotIndex).getDataArea());
        }
        return result;
    }

    /**
     * Translates a Java2D point on the chart to a screen location.
     *
     * @param java2DPoint  the Java2D point.
     *
     * @return The screen location.
     */
    public Point translateJava2DToScreen(Point2D java2DPoint) {
        Rectangle insets = this.getClientArea();
        int x = (int) (java2DPoint.getX() * this.scaleX + insets.x);
        int y = (int) (java2DPoint.getY() * this.scaleY + insets.y);
        return new Point(x, y);
    }

    /**
     * Translates a screen location to a Java SWT point.
     *
     * @param screenPoint  the screen location.
     *
     * @return The Java2D coordinates.
     */
    public Point translateScreenToJavaSWT(Point screenPoint) {
        Rectangle insets = this.getClientArea();
        int x = (int) ((screenPoint.x - insets.x) / this.scaleX);
        int y = (int) ((screenPoint.y - insets.y) / this.scaleY);
        return new Point(x, y);
    }

    /**
     * Translates a screen location to a Java2D point.
     *
     * @param screenPoint  the screen location.
     *
     * @return The Java2D coordinates.
     */
    public Point2D translateScreenToJava2D(Point screenPoint) {
        Rectangle insets = this.getClientArea();
        int x = (int) ((screenPoint.x - insets.x) / this.scaleX);
        int y = (int) ((screenPoint.y - insets.y) / this.scaleY);
        return new Point2D.Double(x, y);
    }

    /**
     * Returns the flag that controls whether or not a horizontal axis trace
     * line is drawn over the plot area at the current mouse location.
     * 
     * @return A boolean.
     */
    public boolean getHorizontalAxisTrace() {
        return this.horizontalAxisTrace;    
    }
    
    /**
     * A flag that controls trace lines on the horizontal axis.
     *
     * @param flag  <code>true</code> enables trace lines for the mouse
     *      pointer on the horizontal axis.
     */
    public void setHorizontalAxisTrace(boolean flag) {
        this.horizontalAxisTrace = flag;
    }
    
    /**
     * Returns the flag that controls whether or not a vertical axis trace
     * line is drawn over the plot area at the current mouse location.
     * 
     * @return A boolean.
     */
    public boolean getVerticalAxisTrace() {
        return this.verticalAxisTrace;    
    }
    
    /**
     * A flag that controls trace lines on the vertical axis.
     *
     * @param flag  <code>true</code> enables trace lines for the mouse
     *              pointer on the vertical axis.
     */
    public void setVerticalAxisTrace(boolean flag) {
        this.verticalAxisTrace = flag;
    }

    /**
     * @param displayToolTips the displayToolTips to set
     */
    public void setDisplayToolTips( boolean displayToolTips ) {
        this.displayToolTips = displayToolTips;
    }

    /**
     * Returns a string for the tooltip.
     *
     * @param e  the mouse event.
     *
     * @return A tool tip or <code>null</code> if no tooltip is available.
     */
    public String getToolTipText(org.eclipse.swt.events.MouseEvent e) {
        String result = null;
        if (this.info != null) {
            EntityCollection entities = this.info.getEntityCollection();
            if (entities != null) {
                Rectangle insets = getClientArea();
                ChartEntity entity = entities.getEntity(
                        (int) ((e.x - insets.x) / this.scaleX),
                        (int) ((e.y - insets.y) / this.scaleY));
                if (entity != null) {
                    result = entity.getToolTipText();
                }
            }
        }
        return result;

    }

    /**
     * The idea is to modify the zooming options depending on the type of chart 
     * being displayed by the panel.
     *
     * @param x  horizontal position of the popup.
     * @param y  vertical position of the popup.
     */
    protected void displayPopupMenu(int x, int y) {
        if (this.popup != null) {
            // go through each zoom menu item and decide whether or not to 
            // enable it...
            Plot plot = this.chart.getPlot();
            boolean isDomainZoomable = false;
            boolean isRangeZoomable = false;
            if (plot instanceof Zoomable) {
                Zoomable z = (Zoomable) plot;
                isDomainZoomable = z.isDomainZoomable();
                isRangeZoomable = z.isRangeZoomable();
            }
            if (this.zoomInDomainMenuItem != null) {
                this.zoomInDomainMenuItem.setEnabled(isDomainZoomable);
            }
            if (this.zoomOutDomainMenuItem != null) {
                this.zoomOutDomainMenuItem.setEnabled(isDomainZoomable);
            } 
            if (this.zoomResetDomainMenuItem != null) {
                this.zoomResetDomainMenuItem.setEnabled(isDomainZoomable);
            }

            if (this.zoomInRangeMenuItem != null) {
                this.zoomInRangeMenuItem.setEnabled(isRangeZoomable);
            }
            if (this.zoomOutRangeMenuItem != null) {
                this.zoomOutRangeMenuItem.setEnabled(isRangeZoomable);
            }

            if (this.zoomResetRangeMenuItem != null) {
                this.zoomResetRangeMenuItem.setEnabled(isRangeZoomable);
            }

            if (this.zoomInBothMenuItem != null) {
                this.zoomInBothMenuItem.setEnabled(
                    isDomainZoomable & isRangeZoomable
                );
            }
            if (this.zoomOutBothMenuItem != null) {
                this.zoomOutBothMenuItem.setEnabled(isDomainZoomable 
                        & isRangeZoomable);
            }
            if (this.zoomResetBothMenuItem != null) {
                this.zoomResetBothMenuItem.setEnabled(isDomainZoomable 
                        & isRangeZoomable);
            }

            this.popup.setLocation(x, y);
            this.popup.setVisible(true);
        }

    }

    /**
     * Creates a print job for the chart.
     */
    public void createChartPrintJob() {
        //FIXME try to replace swing print stuff by swt
        PrinterJob job = PrinterJob.getPrinterJob();
        PageFormat pf = job.defaultPage();
        PageFormat pf2 = job.pageDialog(pf);
        if (pf2 != pf) {
            job.setPrintable(this, pf2);
            if (job.printDialog()) {
                try {
                    job.print();
                }
                catch (PrinterException e) {
                    MessageBox messageBox = new MessageBox( 
                            this.canvas.getShell(), SWT.OK | SWT.ICON_ERROR );
                    messageBox.setMessage( e.getMessage() );
                    messageBox.open();
                }
            }
        }
    }

    /**
     * Creates a popup menu for the canvas.
     *
     * @param properties  include a menu item for the chart property editor.
     * @param save  include a menu item for saving the chart.
     * @param print  include a menu item for printing the chart.
     * @param zoom  include menu items for zooming.
     *
     * @return The popup menu.
     */
    protected Menu createPopupMenu(boolean properties, boolean save, 
            boolean print, boolean zoom) {
        
        Menu result = new Menu(this);
        boolean separator = false;

        if (properties) {
            MenuItem propertiesItem = new MenuItem(result, SWT.PUSH);
            propertiesItem.setText(localizationResources.getString(
                    "Properties..."));
            propertiesItem.setData(PROPERTIES_COMMAND);
            propertiesItem.addSelectionListener(this);
            separator = true;
        }
        if (save) {
            if (separator) {
                new MenuItem(result, SWT.SEPARATOR);
                separator = false;
            }
            MenuItem saveItem = new MenuItem(result, SWT.NONE);
            saveItem.setText(localizationResources.getString("Save_as..."));
            saveItem.setData(SAVE_COMMAND);
            saveItem.addSelectionListener(this);
            separator = true;
        }
        if (print) {
            if (separator) {
                new MenuItem(result, SWT.SEPARATOR);
                separator = false;
            }
            MenuItem printItem = new MenuItem(result, SWT.NONE);
            printItem.setText(localizationResources.getString("Print..."));
            printItem.setData(PRINT_COMMAND);
            printItem.addSelectionListener(this);
            separator = true;
        }
        if (zoom) {
            if (separator) {
                new MenuItem(result, SWT.SEPARATOR);
                separator = false;
            }

            Menu zoomInMenu = new Menu(result);
            MenuItem zoomInMenuItem = new MenuItem(result, SWT.CASCADE);
            zoomInMenuItem.setText(localizationResources.getString("Zoom_In"));
            zoomInMenuItem.setMenu(zoomInMenu);

            this.zoomInBothMenuItem = new MenuItem(zoomInMenu, SWT.PUSH);
            this.zoomInBothMenuItem.setText(localizationResources.getString(
                    "All_Axes"));
            this.zoomInBothMenuItem.setData(ZOOM_IN_BOTH_COMMAND);
            this.zoomInBothMenuItem.addSelectionListener(this);

            new MenuItem(zoomInMenu, SWT.SEPARATOR);

            this.zoomInDomainMenuItem = new MenuItem(zoomInMenu, SWT.PUSH);
            this.zoomInDomainMenuItem.setText(localizationResources.getString(
                    "Domain_Axis"));
            this.zoomInDomainMenuItem.setData(ZOOM_IN_DOMAIN_COMMAND);
            this.zoomInDomainMenuItem.addSelectionListener(this);

            this.zoomInRangeMenuItem = new MenuItem(zoomInMenu, SWT.PUSH);
            this.zoomInRangeMenuItem.setText(localizationResources.getString(
                    "Range_Axis"));
            this.zoomInRangeMenuItem.setData(ZOOM_IN_RANGE_COMMAND);
            this.zoomInRangeMenuItem.addSelectionListener(this);

            Menu zoomOutMenu = new Menu(result);
            MenuItem zoomOutMenuItem = new MenuItem(result, SWT.CASCADE);
            zoomOutMenuItem.setText(localizationResources.getString(
                    "Zoom_Out"));
            zoomOutMenuItem.setMenu(zoomOutMenu);

            this.zoomOutBothMenuItem = new MenuItem(zoomOutMenu, SWT.PUSH);
            this.zoomOutBothMenuItem.setText(localizationResources.getString(
                    "All_Axes"));
            this.zoomOutBothMenuItem.setData(ZOOM_OUT_BOTH_COMMAND);
            this.zoomOutBothMenuItem.addSelectionListener(this);
            
            new MenuItem(zoomOutMenu, SWT.SEPARATOR);

            this.zoomOutDomainMenuItem = new MenuItem(zoomOutMenu, SWT.PUSH);
            this.zoomOutDomainMenuItem.setText(localizationResources.getString(
                    "Domain_Axis"));
            this.zoomOutDomainMenuItem.setData(ZOOM_OUT_DOMAIN_COMMAND);
            this.zoomOutDomainMenuItem.addSelectionListener(this);

            this.zoomOutRangeMenuItem = new MenuItem(zoomOutMenu, SWT.PUSH);
            this.zoomOutRangeMenuItem.setText(
                    localizationResources.getString("Range_Axis"));
            this.zoomOutRangeMenuItem.setData(ZOOM_OUT_RANGE_COMMAND);
            this.zoomOutRangeMenuItem.addSelectionListener(this);

            Menu autoRangeMenu = new Menu(result);
            MenuItem autoRangeMenuItem = new MenuItem(result, SWT.CASCADE);
            autoRangeMenuItem.setText(localizationResources.getString(
                    "Auto_Range"));