ganttrenderer2.java

在软件开发中用来绘制各种图表的源码

                        rectBreadth, rectLength);
            }
    
            Rectangle2D completeBar = null;
            Rectangle2D incompleteBar = null;
            Number percent = dataset.getPercentComplete(row, column, 
                    subinterval);
            double start = getStartPercent();
            double end = getEndPercent();
            if (percent != null) {
                double p = percent.doubleValue();
                if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
                    completeBar = new Rectangle2D.Double(translatedValue0, 
                            rectStart + start * rectBreadth, rectLength * p, 
                            rectBreadth * (end - start));
                    incompleteBar = new Rectangle2D.Double(translatedValue0 
                            + rectLength * p, rectStart + start * rectBreadth, 
                            rectLength * (1 - p), rectBreadth * (end - start));
                }
                else if (plot.getOrientation() == PlotOrientation.VERTICAL) {
                    completeBar = new Rectangle2D.Double(rectStart + start 
                            * rectBreadth, translatedValue0 + rectLength 
                            * (1 - p), rectBreadth * (end - start), 
                            rectLength * p);
                    incompleteBar = new Rectangle2D.Double(rectStart + start 
                            * rectBreadth, translatedValue0, 
                            rectBreadth * (end - start), rectLength * (1 - p));
                }
                
            }

            Paint seriesPaint = getItemPaint(row, column);
            g2.setPaint(seriesPaint);
            g2.fill(bar);
            if (completeBar != null) {
                g2.setPaint(getCompletePaint());
                g2.fill(completeBar);
            }
            if (incompleteBar != null) {
                g2.setPaint(getIncompletePaint());
                g2.fill(incompleteBar);
            }
            if (isDrawBarOutline() 
                    && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
                g2.setStroke(getItemStroke(row, column));
                g2.setPaint(getItemOutlinePaint(row, column));
                g2.draw(bar);
            }
    
            // collect entity and tool tip information...
            if (state.getInfo() != null) {
                EntityCollection entities = state.getEntityCollection();
                if (entities != null) {
                    String tip = null;
                    if (getToolTipGenerator(row, column) != null) {
                        tip = getToolTipGenerator(row, column).generateToolTip(
                                dataset, row, column);
                    }
                    String url = null;
                    if (getItemURLGenerator(row, column) != null) {
                        url = getItemURLGenerator(row, column).generateURL(
                                dataset, row, column);
                    }
                    CategoryItemEntity entity = new CategoryItemEntity(bar, 
                            tip, url, dataset, row, 
                            dataset.getColumnKey(column), column);
                    entities.add(entity);
                }
            }
        }
    }
    
    /**
     * Draws a single task.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the data plot area.
     * @param plot  the plot.
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the data.
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     */
    protected void drawTask(Graphics2D g2,
                            CategoryItemRendererState state,
                            Rectangle2D dataArea,
                            CategoryPlot plot,
                            CategoryAxis domainAxis,
                            ValueAxis rangeAxis,
                            GanttCategoryDataset dataset,
                            int row,
                            int column) {

        PlotOrientation orientation = plot.getOrientation();

        RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge();
        
        // Y0
        Number value0 = dataset.getEndValue(row, column);
        if (value0 == null) {
            return;
        }
        double java2dValue0 = rangeAxis.valueToJava2D(value0.doubleValue(), 
                dataArea, rangeAxisLocation);

        // Y1
        Number value1 = dataset.getStartValue(row, column);
        if (value1 == null) {
            return;
        }
        double java2dValue1 = rangeAxis.valueToJava2D(value1.doubleValue(), 
                dataArea, rangeAxisLocation);

        if (java2dValue1 < java2dValue0) {
            double temp = java2dValue1;
            java2dValue1 = java2dValue0;
            java2dValue0 = temp;
            Number tempNum = value1;
            value1 = value0;
            value0 = tempNum;
        }

        // count the number of non-null values
        int totalBars = countNonNullValues(dataset, column);  
        if (totalBars == 0) {
            return;
        }
        // count non-null values up to but not including the current value
        int priorBars = countPriorNonNullValues(dataset, column, row); 
        
//        double rectStart = calculateBarW0(plot, orientation, dataArea, 
//                domainAxis, state, row, column);
//        double rectBreadth = state.getBarWidth();

        double rectBreadth = (domainAxis.getCategoryEnd(column, getColumnCount(), 
                dataArea, plot.getDomainAxisEdge()) 
                - domainAxis.getCategoryStart(column, getColumnCount(), 
                dataArea, plot.getDomainAxisEdge())) / totalBars;
        double rectStart = domainAxis.getCategoryStart(column, getColumnCount(), 
                dataArea, plot.getDomainAxisEdge()) + rectBreadth * priorBars;
        double rectLength = Math.abs(java2dValue1 - java2dValue0);
        
        Rectangle2D bar = null;
        if (orientation == PlotOrientation.HORIZONTAL) {
            bar = new Rectangle2D.Double(java2dValue0, rectStart, rectLength, 
                    rectBreadth);
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            bar = new Rectangle2D.Double(rectStart, java2dValue1, rectBreadth, 
                    rectLength);
        }

        Rectangle2D completeBar = null;
        Rectangle2D incompleteBar = null;
        Number percent = dataset.getPercentComplete(row, column);
        double start = getStartPercent();
        double end = getEndPercent();
        if (percent != null) {
            double p = percent.doubleValue();
            if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
                completeBar = new Rectangle2D.Double(java2dValue0, 
                        rectStart + start * rectBreadth, rectLength * p, 
                        rectBreadth * (end - start));
                incompleteBar = new Rectangle2D.Double(java2dValue0 
                        + rectLength * p, rectStart + start * rectBreadth, 
                        rectLength * (1 - p), rectBreadth * (end - start));
            }
            else if (plot.getOrientation() == PlotOrientation.VERTICAL) {
                completeBar = new Rectangle2D.Double(rectStart + start 
                        * rectBreadth, java2dValue1 + rectLength * (1 - p), 
                        rectBreadth * (end - start), rectLength * p);
                incompleteBar = new Rectangle2D.Double(rectStart + start 
                        * rectBreadth, java2dValue1, rectBreadth 
                        * (end - start), rectLength * (1 - p));
            }
                
        }

        Paint seriesPaint = getItemPaint(row, column);
        g2.setPaint(seriesPaint);
        g2.fill(bar);

        if (completeBar != null) {
            g2.setPaint(getCompletePaint());
            g2.fill(completeBar);
        }
        if (incompleteBar != null) {
            g2.setPaint(getIncompletePaint());
            g2.fill(incompleteBar);
        }
        
        // draw the outline...
        if (isDrawBarOutline() 
                && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
            Stroke stroke = getItemOutlineStroke(row, column);
            Paint paint = getItemOutlinePaint(row, column);
            if (stroke != null && paint != null) {
                g2.setStroke(stroke);
                g2.setPaint(paint);
                g2.draw(bar);
            }
        }
        
        CategoryItemLabelGenerator generator 
            = getItemLabelGenerator(row, column);
        if (generator != null && isItemLabelVisible(row, column)) {
            drawItemLabel(g2, dataset, row, column, plot, generator, bar, 
                    false);
        }        

        // collect entity and tool tip information...
        if (state.getInfo() != null) {
            EntityCollection entities = state.getEntityCollection();
            if (entities != null) {
                String tip = null;
                CategoryToolTipGenerator tipster = getToolTipGenerator(row, 
                        column);
                if (tipster != null) {
                    tip = tipster.generateToolTip(dataset, row, column);
                }
                String url = null;
                if (getItemURLGenerator(row, column) != null) {
                    url = getItemURLGenerator(row, column).generateURL(dataset, 
                            row, column);
                }
                CategoryItemEntity entity = new CategoryItemEntity(bar, tip, 
                        url, dataset, row, dataset.getColumnKey(column), 
                        column);
                entities.add(entity);
            }
        }

    }
    
    
    /**
     * Calculates the coordinate of the first "side" of a bar.  This will be 
     * the minimum x-coordinate for a vertical bar, and the minimum 
     * y-coordinate for a horizontal bar.
     *
     * @param plot  the plot.
     * @param orientation  the plot orientation.
     * @param dataArea  the data area.
     * @param domainAxis  the domain axis.
     * @param state  the renderer state (has the bar width precalculated).
     * @param row  the row index.
     * @param column  the column index.
     * 
     * @return The coordinate.
     */
    protected double calculateBarW0(CategoryPlot plot, 
                                    PlotOrientation orientation, 
                                    Rectangle2D dataArea,
                                    CategoryAxis domainAxis,
                                    CategoryItemRendererState state,
                                    int row,
                                    int column) {
        // calculate bar width...
        double space = 0.0;
        if (orientation == PlotOrientation.HORIZONTAL) {
            space = dataArea.getHeight();
        }
        else {
            space = dataArea.getWidth();
        }
        double barW0 = domainAxis.getCategoryStart(column, getColumnCount(), 
                dataArea, plot.getDomainAxisEdge());
        int seriesCount = getRowCount();
        int categoryCount = getColumnCount();
        if (seriesCount > 1) {
            double seriesGap = space * getItemMargin() 
                               / (categoryCount * (seriesCount - 1));
            double seriesW = calculateSeriesWidth(space, domainAxis, 
                    categoryCount, seriesCount);
            barW0 = barW0 + row * (seriesW + seriesGap) 
                          + (seriesW / 2.0) - (state.getBarWidth() / 2.0);
        }
        else {
            barW0 = domainAxis.getCategoryMiddle(column, getColumnCount(), 
                    dataArea, plot.getDomainAxisEdge()) - state.getBarWidth() 
                    / 2.0;
        }
        return barW0;
    }
    
    private int countNonNullValues(CategoryDataset dataset, int column) {
        return countPriorNonNullValues(dataset, column, dataset.getRowCount());
    }
    
    private int countPriorNonNullValues(CategoryDataset dataset, int column, 
            int row) {
        if (row == 0) {
            return 0;
        }
        int count = 0;
        for (int r = 0; r < row; r++) {
            if (dataset.getValue(r, column) != null) {
                count++;
            }
        }
        return count;
    }
    
}