Project list page - to filter and show data as per last selection
public Query applyFilter(Query _query, boolean _saveFilterValues = false) { //QueryBuildDataSource parentProjTableDataSource, parentProjTableDataSource2; int s; //CtrlBottomProjLevels.allowEdit(false); s = customFilter.getFilterControlValue(formControlStr(ProjProjectsListPage, CtrlProjLevels)); if (customFilter.getFilterControlValue(formControlStr(ProjProjectsListPage, CtrlProjLevels)) == ProjLevels::Top) { SysQuery::findOrCreateRange(_query.dataSourceTable(tableNum(ProjTable)), fieldNum(ProjTable, ParentId)).value(SysQuery::valueEmptyString()); //ProjTable_ds.executeQuery(); //ProjTable_ds.query().dataSourceTable(tableNum(ProjTable)).clearRange(fieldNum(ProjTable, ParentId)); } else if(customFilter.getFilterControlValue(formControlStr(ProjProjectsListPage, CtrlProjLevels)) == ProjLevels::Phase) { parentProjTableDataSource = _query.dataSourceTable(tableNum(ProjTable)).addDataSource(tableNum(ProjTable));/