ganttrenderer.java

制作图表的好工具

            double translatedValue1 = rangeAxis.valueToJava2D(
                value1.doubleValue(), dataArea, rangeAxisLocation
            );
    
            if (translatedValue1 < translatedValue0) {
                double temp = translatedValue1;
                translatedValue1 = translatedValue0;
                translatedValue0 = temp;
            }
    
            double rectStart = calculateBarW0(
                plot, plot.getOrientation(), dataArea, domainAxis, state, 
                row, column
            );
            double rectLength = Math.abs(translatedValue1 - translatedValue0);
            double rectBreadth = state.getBarWidth();
    
            // DRAW THE BARS...
            Rectangle2D bar = null;
            
            if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
                bar = new Rectangle2D.Double(
                    translatedValue0, rectStart, rectLength, rectBreadth
                );
            }
            else if (plot.getOrientation() == PlotOrientation.VERTICAL) {
                bar = new Rectangle2D.Double(
                    rectStart, translatedValue0, 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;
        }

        double rectStart = calculateBarW0(
            plot, orientation, dataArea, domainAxis, state, row, column
        );
        double rectBreadth = state.getBarWidth();
        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);
            }
        }

    }
    
}