Adding custom filter on a list page

Imagine you want a filter on a list page say planned orders list page. Filter works on the order date and shows order due today or all. It has two values in the selection Today/All. Its not that straightforward as it may seem as it is a list page. On a normal AX form, its much easier.

A number of steps required to achieve this.

1. Add the custom filter to the list page. Note the filterExpression, its a call to method we create in next step. Also you need an enum and an EDT based off the enum, EDT is selected in the properties as well.

2. SysQueryRangeUtil
Add a method to the SysQueryRangeUtil.

3. Interaction class

List pages use the interaction classes for logic. We need to customize 2 methods in the ReqTransPOListPageInteraction.

In method initializing, after super(), add this

   customFilter = SysEPCustomFilter::construct(formStr(ReqTransPOListPage));  
   customFilter.load();  
   customFilter.setInitialFilterControlValue(formControlStr(ReqTransPOListPage, yourFilter), 0);  

Note: customFilter.load() will reload the last saved selection in your filter. In case, you want a specific enum selection everytime, comment out this line.

In method initializeQuery, before super(), add this

Note the call to method in SysQueryRangeUtil

   if (this.listPage().listPageArgs().parameters())  
   {  
     reqPOFilterEnum = customFilter.getFilterControlValue(formControlStr(ReqTransPOListPage, yourFilter));  
     SysQuery::findOrCreateRange(_query.dataSourceTable(tableNum(ReqPO)), fieldNum(ReqPO, ReqDateOrder)).value(SysQueryRangeUtil::xxxReqPOFilter(reqPOFilterEnum));  
   }  

4. Your list page 

That's it. Cheers