flowable设置流程跟踪高亮线的颜色

背景：在实际情况下，很多人对这个红色的高亮有意见，所以这里我把我的修改颜色的代码分享出来，希望对大家有帮助。（如果有问题可以加QQ群：633168411 里面很多高手，人也都非常善良）

效果如下：

 

1、定义 MyDefaultProcessDiagramCanvas

public class MyDefaultProcessDiagramCanvas extends DefaultProcessDiagramCanvas {
    //设置高亮线的颜色  这里我设置成绿色
    protected static Color HIGHLIGHT_SEQUENCEFLOW_COLOR = Color.GREEN;

    public MyDefaultProcessDiagramCanvas(int width, int height, int minX, int minY, String imageType, String activityFontName, String labelFontName, String annotationFontName, ClassLoader customClassLoader) {
        super(width, height, minX, minY, imageType, activityFontName, labelFontName, annotationFontName, customClassLoader);
    }

    public MyDefaultProcessDiagramCanvas(int width, int height, int minX, int minY, String imageType) {
        super(width, height, minX, minY, imageType);
    }


    /**
     * 画线颜色设置
     */
    public void drawConnection(int[] xPoints, int[] yPoints, boolean conditional, boolean isDefault, String connectionType,
                               AssociationDirection associationDirection, boolean highLighted, double scaleFactor) {

        Paint originalPaint = g.getPaint();
        Stroke originalStroke = g.getStroke();

        g.setPaint(CONNECTION_COLOR);
        if (connectionType.equals("association")) {
            g.setStroke(ASSOCIATION_STROKE);
        } else if (highLighted) {
            //设置线的颜色
            g.setPaint(HIGHLIGHT_SEQUENCEFLOW_COLOR);
            g.setStroke(HIGHLIGHT_FLOW_STROKE);
        }

        for (int i = 1; i < xPoints.length; i++) {
            Integer sourceX = xPoints[i - 1];
            Integer sourceY = yPoints[i - 1];
            Integer targetX = xPoints[i];
            Integer targetY = yPoints[i];
            Line2D.Double line = new Line2D.Double(sourceX, sourceY, targetX, targetY);
            g.draw(line);
        }

        if (isDefault) {
            Line2D.Double line = new Line2D.Double(xPoints[0], yPoints[0], xPoints[1], yPoints[1]);
            drawDefaultSequenceFlowIndicator(line, scaleFactor);
        }

        if (conditional) {
            Line2D.Double line = new Line2D.Double(xPoints[0], yPoints[0], xPoints[1], yPoints[1]);
            drawConditionalSequenceFlowIndicator(line, scaleFactor);
        }

        if (associationDirection == AssociationDirection.ONE || associationDirection == AssociationDirection.BOTH) {
            Line2D.Double line = new Line2D.Double(xPoints[xPoints.length - 2], yPoints[xPoints.length - 2], xPoints[xPoints.length - 1], yPoints[xPoints.length - 1]);
            drawArrowHead(line, scaleFactor);
        }
        if (associationDirection == AssociationDirection.BOTH) {
            Line2D.Double line = new Line2D.Double(xPoints[1], yPoints[1], xPoints[0], yPoints[0]);
            drawArrowHead(line, scaleFactor);
        }
        g.setPaint(originalPaint);
        g.setStroke(originalStroke);
    }

    /**
     * 高亮节点设置
     */
    public void drawHighLight(int x, int y, int width, int height) {
        Paint originalPaint = g.getPaint();
        Stroke originalStroke = g.getStroke();
        //设置高亮节点的颜色
        g.setPaint(HIGHLIGHT_COLOR);
        g.setStroke(THICK_TASK_BORDER_STROKE);

        RoundRectangle2D rect = new RoundRectangle2D.Double(x, y, width, height, 20, 20);
        g.draw(rect);

        g.setPaint(originalPaint);
        g.setStroke(originalStroke);
    }    

2、定义一个 MyDefaultProcessDiagramGenerator  

这里只是修改一下名称 把

DefaultProcessDiagramGenerator的代码搬进去即可  然后把

DefaultProcessDiagramCanvas 改成 MyDefaultProcessDiagramCanvas 即可

public class MyDefaultProcessDiagramGenerator implements ProcessDiagramGenerator {

}

3、生成图片

@Service
public class FlowProcessDiagramGenerator extends MyDefaultProcessDiagramGenerator {

    private static final String IMAGE_TYPE = "png";

    @Value("${flowable.activityFontName}")
    private String activityFontName;
    @Value("${flowable.labelFontName}")
    private String labelFontName;
    @Value("${flowable.annotationFontName}")
    private String annotationFontName;

    /**
     * 生成图片流
     *
     * @param bpmnModel             模型
     * @param highLightedActivities 活动节点
     * @param highLightedFlows      高亮线
     * @return
     */
    public InputStream generateDiagram(BpmnModel bpmnModel, List<String> highLightedActivities, List<String> highLightedFlows) {
        return generateDiagram(bpmnModel, IMAGE_TYPE, highLightedActivities,
                highLightedFlows, activityFontName, labelFontName, annotationFontName,
                null, 1.0, true);
    }
}