基于easyui开发Web版Activiti流程定制器详解(六)——Draw2d的扩展(三)
题外话:
最近在忙公司的云项目空闲时间不是很多,所以很久没来更新,今天补上一篇!
回顾:
前几篇介绍了一下设计器的界面和Draw2d基础知识,这篇讲解一下本设计器如何扩展Draw2d。
进入主题:
先看一下扩展的类图:
其中有颜色标注的类即是扩展类,其中Node、Port、InputPort、OutputPort是Draw2d提供的类,其余都是扩展类。
这里重点介绍几个核心类以及相关重要的方法,如下:
上图中黄色部分负责生成Activiti流程文件中Task对应的XML片段,所以对于不同类型Task需要实现的方法,例如UserTask,代码如下:
- draw2d.UserTask=function(configPropCallback){
- draw2d.Task.call(this,configPropCallback);
- this.performerType=null;
- this.dueDate=null;
- this.priority=null;
- this.formKey = null;
- this.expression=null;
- this.isUseExpression=null;
- this.assignee=null;
- this.candidateUsers=new draw2d.ArrayList();
- this.candidateGroups=new draw2d.ArrayList();
- this.formProperties=new draw2d.ArrayList();
- this.taskListeners=new draw2d.ArrayList();
- this.setTitle("User Task");
- };
- draw2d.UserTask.prototype=new draw2d.Task();
- draw2d.UserTask.prototype.type="draw2d.UserTask";
- draw2d.UserTask.newInstance=function(userTaskXMLNode){
- var task = new draw2d.UserTask();
- task.id=userTaskXMLNode.attr('id');
- task.taskId=userTaskXMLNode.attr('id');
- task.taskName=userTaskXMLNode.attr('name');
- task.setContent(userTaskXMLNode.attr('name'));
- return task;
- };
- draw2d.UserTask.prototype.getIconClassName = function(){
- return "user-task-icon";
- };
- draw2d.UserTask.prototype.getStartElementXML=function(){
- var xml='<userTask ';
- xml=xml+this.getGeneralXML();
- xml=xml+this.getPerformersXML();
- xml=xml+'>\n';
- return xml;
- };
- draw2d.UserTask.prototype.getEndElementXML=function(){
- var xml = '</userTask>\n';
- return xml;
- };
- draw2d.UserTask.prototype.getDocumentationXML=function(){
- if(this.documentation==null||this.documentation=='')return '';
- var xml='<documentation>';
- xml=xml+this.documentation;
- xml=xml+'</documentation>';
- return xml;
- };
- draw2d.UserTask.prototype.getPerformersXML=function(){
- var xml='';
- if(this.isUseExpression){
- if(this.expression!=null&&this.expression!=''){
- if(this.performerType=='assignee'){
- xml=xml+'activiti:assignee="'+this.expression+'" ';
- }else if(this.performerType=='candidateUsers'){
- xml=xml+'activiti:candidateUsers="'+this.expression+'" ';
- }else if(this.performerType=='candidateGroups'){
- xml=xml+'activiti:candidateGroups="'+this.expression+'" ';
- }
- }
- }else{
- if(this.performerType=='assignee'){
- if(this.assignee!=null&&this.assignee!='')
- xml=xml+this.assignee;
- }else if(this.performerType=='candidateUsers'){
- for(var i=0;i<this.candidateUsers.getSize();i++){
- var user = this.candidateUsers.get(i);
- xml=xml+user.sso+',';
- }
- }else if(this.performerType=='candidateGroups'){
- for(var i=0;i<this.candidateGroups.getSize();i++){
- var group = this.candidateGroups.get(i);
- xml=xml+group+',';
- }
- }
- }
- if(this.dueDate!=null&&this.dueDate!=''){
- xml=xml+'activiti:dueDate="'+this.dueDate+'" '
- }
- if(this.formKey != null && this.formKey != ""){
- xml=xml+'activiti:formKey="'+this.formKey+'" ';
- }
- if(this.priority!=null&&this.priority!=''){
- xml=xml+'activiti:priority="'+this.priority+'" '
- }
- return xml;
- };
- draw2d.UserTask.prototype.getExtensionElementsXML=function(){
- if(this.listeners.getSize()==0&&this.formProperties.getSize()==0)return '';
- var xml = '<extensionElements>\n';
- xml=xml+this.getFormPropertiesXML();
- xml=xml+this.getListenersXML();
- xml=xml+'</extensionElements>\n';
- return xml;
- };
- draw2d.UserTask.prototype.getListenersXML=function(){
- var xml = draw2d.Task.prototype.getListenersXML.call(this);
- for(var i=0;i<this.taskListeners.getSize();i++){
- var listener = this.taskListeners.get(i);
- xml=xml+listener.toXML();
- }
- return xml;
- };
- draw2d.UserTask.prototype.getFormPropertiesXML=function(){
- var xml = '';
- for(var i=0;i<this.formProperties.getSize();i++){
- var formProperty = this.formProperties.get(i);
- xml=xml+formProperty.toXML();
- }
- return xml;
- };
- draw2d.UserTask.prototype.toXML=function(){
- var xml=this.getStartElementXML();
- xml=xml+this.getDocumentationXML();
- xml=xml+this.getExtensionElementsXML();
- xml=xml+this.getMultiInstanceXML();
- xml=xml+this.getEndElementXML();
- return xml;
- }
- draw2d.UserTask.prototype.getCandidateUser=function(sso){
- for(var i=0;i<this.candidateUsers.getSize();i++){
- var candidate = this.candidateUsers.get(i);
- if(candidate.sso===sso){
- return candidate;
- }
- }
- return null;
- };
- draw2d.UserTask.prototype.deleteCandidateUser=function(sso){
- var candidate = this.getCandidateUser(sso);
- this.candidateUsers.remove(candidate);
- };
- draw2d.UserTask.prototype.addCandidateUser=function(user){
- if(this.getCandidateUser(user.sso)==null)
- this.candidateUsers.add(user);
- };
- draw2d.UserTask.prototype.getCandidateGroup=function(name){
- for(var i=0;i<this.candidateGroups.getSize();i++){
- var candidate = this.candidateGroups.get(i);
- if(candidate===name){
- return candidate;
- }
- }
- return null;
- };
- draw2d.UserTask.prototype.deleteCandidateGroup=function(name){
- var candidate = this.getCandidateGroup(name);
- this.candidateGroups.remove(candidate);
- };
- draw2d.UserTask.prototype.addCandidateGroup=function(name){
- if(!this.candidateGroups.contains(name))
- this.candidateGroups.add(name);
- };
- draw2d.UserTask.prototype.getTaskListener=function(id){
- for(var i=0;i<this.taskListeners.getSize();i++){
- var listener = this.taskListeners.get(i);
- if(listener.getId()=== id){
- return listener;
- }
- }
- };
- draw2d.UserTask.prototype.deleteTaskListener=function(id){
- var listener = this.getTaskListener(id);
- this.taskListeners.remove(listener);
- };
- draw2d.UserTask.prototype.addTaskListener=function(listener){
- this.taskListeners.add(listener);
- };
- draw2d.UserTask.prototype.setTaskListeners=function(listeners){
- this.taskListeners = listeners;
- };
- draw2d.UserTask.prototype.getFormProperties=function(id){
- for(var i=0;i<this.formProperties.getSize();i++){
- var prop = this.formProperties.get(i);
- if(prop.id== id){
- return prop;
- }
- }
- };
- draw2d.UserTask.prototype.deleteFormProperties=function(id){
- var prop = this.getFormProperties(id);
- this.formProperties.remove(prop);
- };
- draw2d.UserTask.prototype.addFormProperties=function(prop){
- this.formProperties.add(prop);
- };
- draw2d.UserTask.prototype.setFormProperties=function(props){
- this.formProperties = props;
- };
请注意代码中toXML方法,这个方法负责产生UserTask节点的XML代码片段,它调用了其他几个方法:getStartElementXML、getDocumentationXML、getExtensionElementsXML、getMultiInstanceXML、getEndElementXML,不同类型的Task可能不需要调用所以这些方法,可以根据需要选择性调用(当然这取决于Activiti流程文件的规范),当然对于不同类型的Task你也可以添加一些自定义的方法,如:生成操作人的方法(代码中getPerformersXML方法)等等。
由于Activiti设计的Task类型比较多,这里就不一一介绍了有兴趣可以去查看一下源代码还是很好理解的,有问题可以给我留言!
时间有限就先写到这吧!下一篇介绍一下其他扩展类,敬请关注。。。。。。
http://lisonghua2010.iteye.com/admin/blogs/1490165
为了大家下载方便,最近开通的Github下载地址:
https://github.com/lisonghua/activiti-designer
Activit官方文档地址
http://activiti.org/userguide/index.html
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