完整教程：iBizModel 实体逻辑（PSDELOGIC）中的界面逻辑子类（VIEWLOGIC）详解-尧图网站建设

// 界面逻辑参数定义
psdelogicparam(globalparam: 0, name: "currentData", defaultparam: 1, id: "currentData",
parampsdeid: "Demo.Order", logicname: "当前数据对象")
psdelogicparam(globalparam: 20, name: "currentView", id: "currentView",
logicname: "当前视图对象")
psdelogicparam(globalparam: 23, name: "dataGrid", id: "dataGrid",
logicname: "表格部件对象")
psdelogicparam(globalparam: 24, name: "appContext", id: "appContext",
logicname: "应用上下文变量")

2. 界面逻辑节点（PSDELOGICNODE）

界面逻辑节点提供了丰富的前端交互处理能力，特有的节点类型包括：

消息弹窗节点（MSGBOX）：

支持多种消息类型：INFO（常规）、QUESTION（询问）、WARNING（警告）、ERROR（错误）
可配置按钮组合：YESNO（是/否）、YESNOCANCEL（是/否/取消）、OK（确定）、OKCANCEL（确定/取消）

视图部件调用节点（VIEWCTRLINVOKE）：

调用特定视图部件的操作方法，如刷新表格、重置表单等
支持参数传递和返回值处理

前端插件节点（PFPLUGIN）：

集成自定义前端插件，扩展界面逻辑能力
支持插件参数配置和结果回调

脚本代码节点（RAWJSCODE）：

直接执行JavaScript代码片段
支持动态参数注入和结果返回

3. 界面逻辑连接（PSDELOGICLINK）

界面逻辑连接支持复杂的条件判断和流程控制：

连接条件类型：

单项条件（SINGLE）：基于单个参数值的条件判断
组合条件（GROUP）：多个条件的与（AND）/或（OR）组合
异步结束（defaultlink: 2）：前端异步调用结束时进入
异步拒绝（defaultlink: 3）：前端异步调用被拒绝时进入
异常连接（defaultlink: 9）：处理节点执行异常时的备用路径

条件操作支持：

等于（EQ）、不等于（NOTEQ）
大于（GT）、大于等于（GTANDEQ）
小于（LT）、小于等于（LTANDEQ）
空值判断（ISNULL、ISNOTNULL）
文本包含（LIKE、LEFTLIKE、RIGHTLIKE）

五、界面逻辑DSL示例详解

以下是一个完整的界面逻辑DSL示例，展示了各种界面交互场景：

//iBizModelDSL建模指令，目标：演示完整的界面逻辑流程
def de_order = "Demo.ORDER"
def mod_demo = "Demo"
psdelogic(
logictype: "VIEWLOGIC",
codename: "order_management_ui",
name: "订单管理界面逻辑",
psdeid: de_order,
psmoduleid: mod_demo
){
// 参数定义
psdelogicparam(globalparam: 0, name: "Default", defaultparam: 1, id: "Default",
parampsdeid: de_order, logicname: "传入数据对象")
psdelogicparam(globalparam: 23, name: "orderGrid", id: "orderGrid",
logicname: "订单表格部件")
psdelogicparam(globalparam: 24, name: "appContext", id: "appContext",
logicname: "应用上下文")
psdelogicparam(globalparam: 10, name: "userChoice", id: "userChoice",
stddatatype: 25, logicname: "用户选择结果")
// 开始节点
psdelogicnode(leftpos: 100, codename: "Begin", name: "开始处理",
id: "Begin", logicnodetype: "BEGIN", toppos: 100)
// 确认删除对话框
psdelogicnode(
leftpos: 100,
codename: "ConfirmDelete",
name: "确认删除对话框",
id: "ConfirmDelete",
logicnodetype: "MSGBOX",
toppos: 250,
param1: "OKCANCEL",
param2: "QUESTION",
param3: "确认删除",
param4: "确定要删除选中的订单吗？此操作不可恢复。"
)
// 用户选择处理分支
psdelogicnode(
leftpos: 100,
codename: "ProcessChoice",
name: "处理用户选择",
id: "ProcessChoice",
logicnodetype: "PREPAREJSPARAM",
toppos: 400
){
psdelnparam(
paramtype: "SETPARAMVALUE",
dstpsdlparamid: "userChoice",
srcvaluetype: "SRCDLPARAM",
srcpsdlparamid: "Default",
customsrcparam: "returnValue",
name: "记录用户选择结果"
)
}
// 执行删除操作
psdelogicnode(
leftpos: 100,
codename: "ExecuteDelete",
name: "执行删除操作",
id: "ExecuteDelete",
logicnodetype: "DEACTION",
toppos: 550,
dstpsdeid: de_order,
dstpsdeactionid: de_order + ".Remove",
dstpsdlparamid: "Default",
retpsdlparamid: "Default"
)
// 刷新表格
psdelogicnode(
leftpos: 100,
codename: "RefreshGrid",
name: "刷新订单表格",
id: "RefreshGrid",
logicnodetype: "VIEWCTRLINVOKE",
toppos: 700,
srcpsdlparamid: "orderGrid",
param2: "refresh"
)
// 成功提示
psdelogicnode(
leftpos: 100,
codename: "SuccessMsg",
name: "操作成功提示",
id: "SuccessMsg",
logicnodetype: "MSGBOX",
toppos: 850,
param1: "OK",
param2: "INFO",
param3: "操作成功",
param4: "订单删除成功！"
)
// 异常处理节点
psdelogicnode(
leftpos: 300,
codename: "ErrorHandler",
name: "异常处理",
id: "ErrorHandler",
logicnodetype: "MSGBOX",
toppos: 550,
param1: "OK",
param2: "ERROR",
param3: "操作失败",
param4: "删除操作执行失败，请重试或联系管理员。"
)
// 结束节点
psdelogicnode(leftpos: 100, codename: "End", name: "结束",
id: "End", logicnodetype: "END", toppos: 1000)
// 逻辑连接定义
psdelogiclink(ordervalue: 100, name: "开始到确认对话框",
srcpsdelogicnodeid: "Begin", dstpsdelogicnodeid: "ConfirmDelete")
// 用户确认删除分支
psdelogiclink(ordervalue: 200, name: "确认删除处理",
srcpsdelogicnodeid: "ConfirmDelete", dstpsdelogicnodeid: "ProcessChoice"){
psdellcond(dstpsdlparamid: "Default", logictype: "SINGLE",
condvalue: "ok", psdbvalueopid: "EQ", name: "用户选择确认")
}
psdelogiclink(ordervalue: 300, name: "处理选择到执行删除",
srcpsdelogicnodeid: "ProcessChoice", dstpsdelogicnodeid: "ExecuteDelete")
psdelogiclink(ordervalue: 400, name: "删除成功刷新表格",
srcpsdelogicnodeid: "ExecuteDelete", dstpsdelogicnodeid: "RefreshGrid")
psdelogiclink(ordervalue: 500, name:刷新后提示成功,
srcpsdelogicnodeid: "RefreshGrid", dstpsdelogicnodeid: "SuccessMsg")
psdelogiclink(ordervalue: 600, name: "完成处理",
srcpsdelogicnodeid: "SuccessMsg", dstpsdelogicnodeid: "End")
// 用户取消删除分支
psdelogiclink(ordervalue: 700, name: "用户取消操作",
srcpsdelogicnodeid: "ConfirmDelete", dstpsdelogicnodeid: "End"){
psdellcond(dstpsdlparamid: "Default", logictype: "SINGLE",
condvalue: "cancel", psdbvalueopid: "EQ", name: "用户选择取消")
}
// 异常处理连接
psdelogiclink(ordervalue: 800, defaultlink: 9, name: "删除操作异常",
srcpsdelogicnodeid: "ExecuteDelete", dstpsdelogicnodeid: "ErrorHandler")
psdelogiclink(ordervalue: 900, name: "异常处理后结束",
srcpsdelogicnodeid: "ErrorHandler", dstpsdelogicnodeid: "End")
}

六、界面逻辑的高级特性

1. 异步操作处理

界面逻辑天然支持异步操作场景：

// 异步数据加载示例
psdelogicnode(
codename: "AsyncLoadData",
name: "异步加载订单数据",
logicnodetype: "DEDATASET",
dstpsdeid: de_order,
dstpsdedatasetid: de_order + ".Default",
dstpsdlparamid: "filter",
retpsdlparamid: "dataList"
)

2. 部件事件响应

处理界面部件的各种事件：

// 表格行点击事件处理
psdelogicnode(
codename: "HandleRowClick",
name: "处理行点击事件",
logicnodetype: "PREPAREJSPARAM"
){
psdelnparam(
paramtype: "SETPARAMVALUE",
dstpsdlparamid: "selectedRow",
srcvaluetype: "SRCDLPARAM",
srcpsdlparamid: "eventData",
customsrcparam: "rowData"
)
}

3. 动态界面更新

根据业务状态动态更新界面：

// 动态控制界面元素状态
psdelogicnode(
codename: "UpdateUIState",
name: "更新界面状态",
logicnodetype: "VIEWCTRLINVOKE",
srcpsdlparamid: "toolbar",
param2: "setItemState",
param3: "deleteBtn",
param4: "disabled"
)