pieplot3d.java

用于制作报表的中间件控件,纯java编写,还附带有数据库操作的源代码

        if (sectionKeys.size() == 0) {
            return;
        }

        // establish the coordinates of the top left corner of the drawing area
        double arcX = pieArea.getX();
        double arcY = pieArea.getY();

        //g2.clip(clipArea);
        Composite originalComposite = g2.getComposite();
        g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 
                getForegroundAlpha()));

        double totalValue = DatasetUtilities.calculatePieDatasetTotal(dataset);
        double runningTotal = 0;
        if (depth < 0) {
            return;  // if depth is negative don't draw anything
        }

        ArrayList arcList = new ArrayList();
        Arc2D.Double arc;
        Paint paint;
        Paint outlinePaint;
        Stroke outlineStroke;

        Iterator iterator = sectionKeys.iterator();
        while (iterator.hasNext()) {

            Comparable currentKey = (Comparable) iterator.next();
            Number dataValue = dataset.getValue(currentKey);
            if (dataValue == null) {
                arcList.add(null);
                continue;
            }
            double value = dataValue.doubleValue();
            if (value <= 0) {
                arcList.add(null);
                continue;
            }
            double startAngle = getStartAngle();
            double direction = getDirection().getFactor();
            double angle1 = startAngle + (direction * (runningTotal * 360)) 
                    / totalValue;
            double angle2 = startAngle + (direction * (runningTotal + value) 
                    * 360) / totalValue;
            if (Math.abs(angle2 - angle1) > getMinimumArcAngleToDraw()) {
                arcList.add(new Arc2D.Double(arcX, arcY + depth, 
                        pieArea.getWidth(), pieArea.getHeight() - depth,
                        angle1, angle2 - angle1, Arc2D.PIE));
            }
            else {
                arcList.add(null);
            }
            runningTotal += value;
        }

        Shape oldClip = g2.getClip();

        Ellipse2D top = new Ellipse2D.Double(pieArea.getX(), pieArea.getY(), 
                pieArea.getWidth(), pieArea.getHeight() - depth);

        Ellipse2D bottom = new Ellipse2D.Double(pieArea.getX(), pieArea.getY() 
                + depth, pieArea.getWidth(), pieArea.getHeight() - depth);

        Rectangle2D lower = new Rectangle2D.Double(top.getX(), 
                top.getCenterY(), pieArea.getWidth(), bottom.getMaxY() 
                - top.getCenterY());

        Rectangle2D upper = new Rectangle2D.Double(pieArea.getX(), top.getY(), 
                pieArea.getWidth(), bottom.getCenterY() - top.getY());

        Area a = new Area(top);
        a.add(new Area(lower));
        Area b = new Area(bottom);
        b.add(new Area(upper));
        Area pie = new Area(a);
        pie.intersect(b);

        Area front = new Area(pie);
        front.subtract(new Area(top));

        Area back = new Area(pie);
        back.subtract(new Area(bottom));

        // draw the bottom circle
        int[] xs;
        int[] ys;
        arc = new Arc2D.Double(arcX, arcY + depth, pieArea.getWidth(), 
                pieArea.getHeight() - depth, 0, 360, Arc2D.PIE);

        int categoryCount = arcList.size();
        for (int categoryIndex = 0; categoryIndex < categoryCount; 
                 categoryIndex++) {
            arc = (Arc2D.Double) arcList.get(categoryIndex);
            if (arc == null) {
                continue;
            }
            Comparable key = getSectionKey(categoryIndex);
            paint = lookupSectionPaint(key, true);
            outlinePaint = lookupSectionOutlinePaint(key);
            outlineStroke = lookupSectionOutlineStroke(key);
            g2.setPaint(paint);
            g2.fill(arc);
            g2.setPaint(outlinePaint);
            g2.setStroke(outlineStroke);
            g2.draw(arc);
            g2.setPaint(paint);

            Point2D p1 = arc.getStartPoint();

            // draw the height
            xs = new int[] {(int) arc.getCenterX(), (int) arc.getCenterX(),
                    (int) p1.getX(), (int) p1.getX()};
            ys = new int[] {(int) arc.getCenterY(), (int) arc.getCenterY() 
                    - depth, (int) p1.getY() - depth, (int) p1.getY()};
            Polygon polygon = new Polygon(xs, ys, 4);
            g2.setPaint(java.awt.Color.lightGray);
            g2.fill(polygon);
            g2.setPaint(outlinePaint);
            g2.setStroke(outlineStroke);
            g2.draw(polygon);
            g2.setPaint(paint);

        }

        g2.setPaint(Color.gray);
        g2.fill(back);
        g2.fill(front);

        // cycle through once drawing only the sides at the back...
        int cat = 0;
        iterator = arcList.iterator();
        while (iterator.hasNext()) {
            Arc2D segment = (Arc2D) iterator.next();
            if (segment != null) {
                Comparable key = getSectionKey(cat);
                paint = lookupSectionPaint(key, true);
                outlinePaint = lookupSectionOutlinePaint(key);
                outlineStroke = lookupSectionOutlineStroke(key);
                drawSide(g2, pieArea, segment, front, back, paint, 
                        outlinePaint, outlineStroke, false, true);
            }
            cat++;
        }

        // cycle through again drawing only the sides at the front...
        cat = 0;
        iterator = arcList.iterator();
        while (iterator.hasNext()) {
            Arc2D segment = (Arc2D) iterator.next();
            if (segment != null) {
                Comparable key = getSectionKey(cat);
                paint = lookupSectionPaint(key);
                outlinePaint = lookupSectionOutlinePaint(key);
                outlineStroke = lookupSectionOutlineStroke(key);
                drawSide(g2, pieArea, segment, front, back, paint, 
                        outlinePaint, outlineStroke, true, false);
            }
            cat++;
        }

        g2.setClip(oldClip);

        // draw the sections at the top of the pie (and set up tooltips)...
        Arc2D upperArc;
        for (int sectionIndex = 0; sectionIndex < categoryCount; 
                 sectionIndex++) {
            arc = (Arc2D.Double) arcList.get(sectionIndex);
            if (arc == null) {
                continue;
            }
            upperArc = new Arc2D.Double(arcX, arcY, pieArea.getWidth(),
                    pieArea.getHeight() - depth, arc.getAngleStart(), 
                    arc.getAngleExtent(), Arc2D.PIE);
            
            Comparable currentKey = (Comparable) sectionKeys.get(sectionIndex);
            paint = lookupSectionPaint(currentKey, true);
            outlinePaint = lookupSectionOutlinePaint(currentKey);
            outlineStroke = lookupSectionOutlineStroke(currentKey);
            g2.setPaint(paint);
            g2.fill(upperArc);
            g2.setStroke(outlineStroke);
            g2.setPaint(outlinePaint);
            g2.draw(upperArc);

           // add a tooltip for the section...
            if (info != null) {
                EntityCollection entities 
                        = info.getOwner().getEntityCollection();
                if (entities != null) {
                    String tip = null;
                    PieToolTipGenerator tipster = getToolTipGenerator();
                    if (tipster != null) {
                        // @mgs: using the method's return value was missing 
                        tip = tipster.generateToolTip(dataset, currentKey);
                    }
                    String url = null;
                    if (getURLGenerator() != null) {
                        url = getURLGenerator().generateURL(dataset, currentKey,
                                getPieIndex());
                    }
                    PieSectionEntity entity = new PieSectionEntity(
                            upperArc, dataset, getPieIndex(), sectionIndex, 
                            currentKey, tip, url);
                    entities.add(entity);
                }
            }
            List keys = dataset.getKeys();
            Rectangle2D adjustedPlotArea = new Rectangle2D.Double(
                    originalPlotArea.getX(), originalPlotArea.getY(), 
                    originalPlotArea.getWidth(), originalPlotArea.getHeight() 
                    - depth);
            if (getSimpleLabels()) {
                drawSimpleLabels(g2, keys, totalValue, adjustedPlotArea, 
                        linkArea, state);
            }
            else {
                drawLabels(g2, keys, totalValue, adjustedPlotArea, linkArea, 
                        state);
            }
        }

        g2.setClip(savedClip);
        g2.setComposite(originalComposite);
        drawOutline(g2, originalPlotArea);

    }

    /**
     * Draws the side of a pie section.
     *
     * @param g2  the graphics device.
     * @param plotArea  the plot area.
     * @param arc  the arc.
     * @param front  the front of the pie.
     * @param back  the back of the pie.
     * @param paint  the color.
     * @param outlinePaint  the outline paint.
     * @param outlineStroke  the outline stroke.
     * @param drawFront  draw the front?
     * @param drawBack  draw the back?
     */
    protected void drawSide(Graphics2D g2,
                            Rectangle2D plotArea, 
                            Arc2D arc, 
                            Area front, 
                            Area back,
                            Paint paint, 
                            Paint outlinePaint,
                            Stroke outlineStroke,
                            boolean drawFront, 
                            boolean drawBack) {

        if (getDarkerSides()) {
            if (paint instanceof Color) {
                Color c = (Color) paint;
                c = c.darker();
                paint = c;
            }
        }

        double start = arc.getAngleStart();
        double extent = arc.getAngleExtent();
        double end = start + extent;

        g2.setStroke(outlineStroke);
        
        // for CLOCKWISE charts, the extent will be negative...
        if (extent < 0.0) {

            if (isAngleAtFront(start)) {  // start at front

                if (!isAngleAtBack(end)) {

                    if (extent > -180.0) {  // the segment is entirely at the 
                                            // front of the chart
                        if (drawFront) {
                            Area side = new Area(new Rectangle2D.Double(
                                    arc.getEndPoint().getX(), plotArea.getY(), 
                                    arc.getStartPoint().getX() 
                                    - arc.getEndPoint().getX(),
                                    plotArea.getHeight()));
                            side.intersect(front);
                            g2.setPaint(paint);
                            g2.fill(side);
                            g2.setPaint(outlinePaint);
                            g2.draw(side);
                        }
                    }
                    else {  // the segment starts at the front, and wraps all 
                            // the way around
                            // the back and finishes at the front again
                        Area side1 = new Area(new Rectangle2D.Double(
                                plotArea.getX(), plotArea.getY(),
                                arc.getStartPoint().getX() - plotArea.getX(), 
                                plotArea.getHeight()));
                        side1.intersect(front);

                        Area side2 = new Area(new Rectangle2D.Double(
                                arc.getEndPoint().getX(), plotArea.getY(),
                                plotArea.getMaxX() - arc.getEndPoint().getX(),
                                plotArea.getHeight()));

                        side2.intersect(front);
                        g2.setPaint(paint);
                        if (drawFront) {
                            g2.fill(side1);
                            g2.fill(side2);
                        }

                        if (drawBack) {
                            g2.fill(back);
                        }

                        g2.setPaint(outlinePaint);
                        if (drawFront) {
                            g2.draw(side1);
                            g2.draw(side2);
                        }

                        if (drawBack) {
                            g2.draw(back);
                        }

                    }
                }
                else {  // starts at the front, finishes at the back (going 
                        // around the left side)

                    if (drawBack) {
                        Area side2 = new Area(new Rectangle2D.Double(
                                plotArea.getX(), plotArea.getY(),