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HTML

              
                <div id="grid"></div>

              
            
!

CSS

              
                
              
            
!

JS

              
                const suppliers = [{
  _id: 1,
  number: 20,
  viewName: "Rubber Chicken Ltd",
  details: "13 Some Road, SomePlace, 23948 Burgh",
}, {
  _id: 2,
  number: 22,
  viewName: "Pulley Inc.",
  details: "Pulley Square, Out There, A637Z3 Boondocks",
}]

const bookings = [{
  _id: 1,
  number: 1,
  date: new Date(2016, 0, 3),
  details: "Monthly Pulley payment",
  supplier_id: 2,
  amount: 12.59,
  currency: "USD"
}, {
  _id: 1,
  number: 2,
  date: new Date(2016, 0, 4),
  details: "Big Rubber Chicken order",
  supplier_id: 1,
  amount: 47623.45,
  currency: "BOO"
}];

const supplierPopupDataStore = new DevExpress.data.CustomStore({
  key: "_id",
  load: function() { 
    const that = this;
    return $.Deferred(d => {
      const result = that.customFilter ? 
        that.getFilteredData(that.customFilter) : suppliers;
      that._totalCount = result.length;
      d.resolve(result, { totalCount: that._totalCount });
    }).promise();
  },
  totalCount: function() {
    return this._totalCount ? this._totalCount : 0;
  }
});

supplierPopupDataStore.indexByKey = key => {
  return suppliers.findIndex(s => s._id === key);
};

supplierPopupDataStore.indexByObject = o => {
  return suppliers.findIndex(s => s._id === o._id);
};

supplierPopupDataStore.customFilter = "";
supplierPopupDataStore.getFilteredData = filterString => {
    function* conditionalYield(row, yieldedIds) {
      if (!yieldedIds.includes(row._id)) {
        yieldedIds.push(row._id);
        yield row;
      }
    }
    function* preciseNumbers(yieldedIds) {
      for (let row of suppliers) {
        if (row.number == filterString) {
          yield* conditionalYield(row, yieldedIds);
        }
      }
    }
    function* partialNumbers(yieldedIds) {
      for (let row of suppliers) {
        if (row.number.toString().includes(filterString)) {
          yield* conditionalYield(row, yieldedIds);
        }
      }
    }
    function* partialViewName(yieldedIds) {
      for (let row of suppliers) {
        if (row.viewName.includes(filterString)) {
          yield* conditionalYield(row, yieldedIds);
        }
      }
    }
    function* partialDetails(yieldedIds) {
      for (let row of suppliers) {
        if (row.details.includes(filterString)) {
          yield* conditionalYield(row, yieldedIds);
        }
      }
    }
    function* combine() {
      let yieldedIds = [];
      yield* preciseNumbers(yieldedIds);
      yield* partialNumbers(yieldedIds);
      yield* partialViewName(yieldedIds);
      yield* partialDetails(yieldedIds);
    }
    return Array.from(combine());
};


const grid =  $("#grid").dxDataGrid({
  dataSource: bookings,
  columns: [{
      dataField: "number",
      dataType: "number",
      format: {
        type: "decimal",
        precision: 5
      },
      allowEditing: false
    }, {
      dataField: "date",
      dataType: "date"
    },
    "amount",
    "currency",
    "details", {
      dataField: "supplier_id",
      caption: "Supplier",
      lookup: {
        dataSource: {
          store: suppliers,
        },
        valueExpr: "_id",
        displayExpr: s => s ? `${s.number} - ${s.viewName}` : "Not assigned"
      },
      editCellTemplate: (cellElement, cellInfo) => {
        const $editor = $("<div>").appendTo(cellElement).dxTextBox({
          readOnly: true,
          value: cellInfo.text
        });

        let supplierPopupList, form;
        
        function confirmAssignment() {
          const selectedItems = supplierPopupList.option("selectedItems");
          if (selectedItems.length == 1) {
            $editor.dxTextBox("instance").option("value", cellInfo.column.lookup.displayExpr(selectedItems[0]));
            cellInfo.setValue(selectedItems[0]._id);
            popup.hide();
          }
        }

        function escapeOut() {
          popup.hide();
        }

            
        const popup = $('<div class="dx-dropdowneditor-overlay">').appendTo(cellElement).dxPopover({
          height: "45ex",
          width: "45ex",
          showTitle: false,
          showCloseButton: false,
          shading: false,
          position: {
            collision: "flipfit flipfit",
            my: "top",
            at: "bottom"
          },
          toolbarItems: [
            { 
              toolbar: "bottom",
              widget: "dxButton",
              location: "after",
              options: {
                text: "OK",
                type: "default",
                onClick: confirmAssignment
              }
            },
            { 
              toolbar: "bottom",
              widget: "dxButton",
              location: "after",
              options: {
                text: "Cancel",
                onClick: escapeOut
              }
            }
          ],
          contentTemplate: () => {
            const $form = $("<div>").dxForm({
              items: [
                {
                  name: "search",
                  itemType: "simple",
                  editorType: "dxTextBox",
                  editorOptions: {
                    placeholder: "Search for a supplier",
                    mode: "search",
                    value: "", // set this to prevent erroneous change events in the future
                    valueChangeEvent: "keyup",
                    onValueChanged: ({value}) => {
                      supplierPopupDataStore.customFilter = value;
                      supplierPopupList.reload();
                      supplierPopupList.selectItem(0);
                    }
                  }
                },
                {
                  name: "list",
                  itemType: "simple",
                  template: () => {
                    const $list = $("<div>").dxList({
                      dataSource: {
                        store: supplierPopupDataStore
                      },
                      selectionMode: "single",
                      itemTemplate: (itemData, itemIndex, itemElement) => {
                        itemElement.text(`${itemData.number} - ${itemData.viewName}`);
                      }
                    });
                    supplierPopupList = $list.dxList("instance");
                    $list.dblclick(confirmAssignment);
                    return $list;
                  }
                }
              ]
            });
            
            supplierPopupList.selectItem(supplierPopupDataStore.indexByKey(cellInfo.value));
            
            function upArrow() {
              supplierPopupDataStore.totalCount().done(count => {
                if (count > 0) {
                  const selectedItems = supplierPopupList.option("selectedItems");
                  const currentIndex = selectedItems ? 
                        supplierPopupDataStore.indexByObject(selectedItems[0]) : 1;
                  if (currentIndex > 0) {
                    supplierPopupList.selectItem(currentIndex - 1);
                  }
                }
              });
            }
            
            function downArrow() {
              supplierPopupDataStore.totalCount().done(count => {
                if (count > 0) {
                  const selectedItems = supplierPopupList.option("selectedItems");
                  const currentIndex = selectedItems ? 
                        supplierPopupDataStore.indexByObject(selectedItems[0]) : -1;
                  const newIndex = currentIndex + 1;
                  if (newIndex >= 0 && newIndex < count) {
                    supplierPopupList.selectItem(currentIndex + 1);
                  }
                }
              });
            }
            
            form = $form.dxForm("instance");
            
            form.getEditor("search").registerKeyHandler("upArrow", upArrow);
            form.getEditor("search").registerKeyHandler("downArrow", downArrow);
            
            supplierPopupList.registerKeyHandler("upArrow", upArrow);
            supplierPopupList.registerKeyHandler("downArrow", downArrow);

            form.registerKeyHandler("enter", confirmAssignment);
            supplierPopupList.registerKeyHandler("enter", confirmAssignment); 
            form.registerKeyHandler("escape", escapeOut);
            supplierPopupList.registerKeyHandler("escape", escapeOut);

            return $form;
          },
          onShown: () => {
            if (supplierPopupDataStore.customFilter) {
              supplierPopupDataStore.customFilter = "";
              supplierPopupList.reload();
            }
            form.getEditor("search").focus();
          },
          onHidden: () => grid.closeEditCell()
        }).dxPopover("instance");

        popup.option("position.of", $editor);
        setTimeout(() => {
          popup.show();
        });
      }
    }
  ],
  editing: {
    mode: "batch",
    allowAdding: true,
    allowDeleting: true,
    allowUpdating: true
  }
}).dxDataGrid("instance");
              
            
!
999px

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