flowable 走过的流程图节点描红线

深藏阁楼爱情的钟 2022-09-04 02:47 163阅读 0赞

在正常的flowable就是显示当前节点，路径需要我们自己获取，特别是来回的驳回会导致节点混乱，这里主要就是如何正确的显示流程图

效果：

已经结束的流程

![908626bee72b17090b043df39c9facc6.png][]

正在执行的流程

![aac3151b610490825de9589e4c124d69.png][]

代码：1、生成图片

// 源码 www.1b23.com
    public byte[] createImage2(String processInstanceId) {
            //1.获取当前的流程实例
            ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
            String processDefinitionId = null;
            List<String> activeActivityIds = null;
            //2.获取所有的历史轨迹对象
            List<HistoricActivityInstance> list = historyService.createHistoricActivityInstanceQuery()
                    .processInstanceId(processInstanceId).list();
            Map<String, HistoricActivityInstance> hisActivityMap = new HashMap<>();
            list.forEach(historicActivityInstance -> {
                if (!hisActivityMap.containsKey(historicActivityInstance.getActivityId())) {
                    hisActivityMap.put(historicActivityInstance.getActivityId(), historicActivityInstance);
                }
            });
            //3. 获取流程定义id和高亮的节点id
            if (processInstance != null) {
                //3.1. 正在运行的流程实例
                processDefinitionId = processInstance.getProcessDefinitionId();
                activeActivityIds = runtimeService.getActiveActivityIds(processInstanceId);
            } else {
                //3.2. 已经结束的流程实例
                HistoricProcessInstance historicProcessInstance = historyService.createHistoricProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
                processDefinitionId = historicProcessInstance.getProcessDefinitionId();
                activeActivityIds = new ArrayList<>();
                List<EndEvent> endEvents = bpmnModelService.findEndFlowElement(processDefinitionId);
                List<String> finalActiveActivityIds = activeActivityIds;
                endEvents.forEach(endEvent -> {
                    if (hisActivityMap.containsKey(endEvent.getId())) {
                        finalActiveActivityIds.add(endEvent.getId());
                    }
                });
            }
            //4. 获取流程定义的所有节点信息
            List<FlowNode> flowNodes = bpmnModelService.findFlowNodes(processDefinitionId);
            Map<String, FlowNode> activityMap = flowNodes.stream().collect(Collectors.toMap(FlowNode::getId, flowNode -> flowNode));
            List<String> highLightedFlows = new ArrayList<>();
            //5. 递归得到高亮线
            activeActivityIds.forEach(activeActivityId -> this.getHighLightedFlows(activityMap, hisActivityMap, activeActivityId, highLightedFlows, activeActivityId));
            //6. 获取bpmnModel对象
            BpmnModel bpmnModel = bpmnModelService.getBpmnModelByProcessDefId(processDefinitionId);
            //7. 生成图片流
            InputStream inputStream = flowProcessDiagramGenerator.generateDiagram(bpmnModel, activeActivityIds, highLightedFlows);
            //8. 转化成byte便于网络传输
            byte[] datas = IoUtil.readInputStream(inputStream, "image inputStream name");
            return datas;
        }

递归获取高

//from www.fhadmin.cn
    private void getHighLightedFlows(Map<String, FlowNode> flowNodeMap,
                Map<String, HistoricActivityInstance> hisActivityMap,
                String activeActivityId,
                List<String> highLightedFlows,
                String oldActivityId) {
            FlowNode flowNode = flowNodeMap.get(activeActivityId);
            List<SequenceFlow> incomingFlows = flowNode.getIncomingFlows();
            for (SequenceFlow sequenceFlow : incomingFlows) {
                String sourceRefId = sequenceFlow.getSourceRef();
                if (hisActivityMap.containsKey(sourceRefId) && !oldActivityId.equals(sourceRefId)) {
                    highLightedFlows.add(sequenceFlow.getId());
                    this.getHighLightedFlows(flowNodeMap, hisActivityMap, sourceRefId, highLightedFlows, oldActivityId);
                } else {
    　
    　　　　　　　　　　if (hisActivityMap.containsKey(sourceRefId)){
    　　　　　　　　　　　　　　highLightedFlows.add(sequenceFlow.getId());
    　　　　　　　　　　}
    　　　　　　　　　　break; 
    } } }

[908626bee72b17090b043df39c9facc6.png]: /images/20220829/7027b5a5443044eb8e2e0b8b970c6b79.png
[aac3151b610490825de9589e4c124d69.png]: /images/20220829/a54e9294f8e34c9f9577e19ba3551b44.png