基于easyui开发Web版Activiti流程定制器详解（六）——Draw2d的扩展（一）
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基于easyui开发Web版Activiti流程定制器详解（六）——Draw2d的扩展（一）
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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;?? };??
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;
};
題外話：
? ? ? ?最近在忙公司的云項(xiàng)目空閑時(shí)間不是很多，所以很久沒來更新，今天補(bǔ)上一篇！
回顧：
? ? ? ?前幾篇介紹了一下設(shè)計(jì)器的界面和Draw2d基礎(chǔ)知識，這篇講解一下本設(shè)計(jì)器如何擴(kuò)展Draw2d。
?
進(jìn)入主題：
? ? ? ?先看一下擴(kuò)展的類圖：
?其中有顏色標(biāo)注的類即是擴(kuò)展類，其中Node、Port、InputPort、OutputPort是Draw2d提供的類，其余都是擴(kuò)展類。
?這里重點(diǎn)介紹幾個(gè)核心類以及相關(guān)重要的方法，如下：
上圖中黃色部分負(fù)責(zé)生成Activiti流程文件中Task對應(yīng)的XML片段，所以對于不同類型Task需要實(shí)現(xiàn)的方法，例如UserTask，代碼如下：
?
Js代碼 ??
?請注意代碼中toXML方法，這個(gè)方法負(fù)責(zé)產(chǎn)生UserTask節(jié)點(diǎn)的XML代碼片段，它調(diào)用了其他幾個(gè)方法：getStartElementXML、getDocumentationXML、getExtensionElementsXML、getMultiInstanceXML、getEndElementXML,不同類型的Task可能不需要調(diào)用所以這些方法，可以根據(jù)需要選擇性調(diào)用（當(dāng)然這取決于Activiti流程文件的規(guī)范），當(dāng)然對于不同類型的Task你也可以添加一些自定義的方法，如：生成操作人的方法（代碼中getPerformersXML方法）等等。
由于Activiti設(shè)計(jì)的Task類型比較多，這里就不一一介紹了有興趣可以去查看一下源代碼還是很好理解的，有問題可以給我留言！
時(shí)間有限就先寫到這吧！下一篇介紹一下其他擴(kuò)展類，敬請關(guān)注。。。。。。
?
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