Grid & DataView Events

SlickGrid has a nice amount of Grid Events or DataView Events which you can use by simply hook a subscribe to them (the subscribe are a custom SlickGrid Event and are NOT an RxJS Observable type but they very similar). To get access to all these events, you will have to get access to the Grid and the DataView objects which are exposed in Aurelia-Slickgrid through 2 ways:

1. with bindable values, so you can just call gridChanged and/or dataviewChanged
2. with EventAggregator has multiple event aggregators available (Aurelia-Slickgrid uses publish when the Grid and DataView becomes ready).

Once you can the grid and/or dataview objects, you can then hook to any of the SlickGrid Grid Events and/or SlickGrid DataView Events.

Example with Event Aggregators

Aurelia-Slickgrid (starting with version 1.3.x) have the following Events that you can subscribe to with an Event Aggregator:

• onDataviewCreated
• onGridCreated
• onBeforeGridCreate
• onBeforeGridDestroy
• onAfterGridDestroyed

Example

constructor(private ea: EventAggregator) {
  ea.subscribe('onGridCreated', (grid) => {
    this.gridObj = grid;
  });
  ea.subscribe('onBeforeGridDestroy', (resp) => {
    console.log('onBeforeGridDestroy', resp);
  });
}

Example with Bindable Grid/Dataview

View

Bind dataview.bind and grid.bind

<aurelia-slickgrid 
  gridId="grid2" 
  dataview.bind="dataviewObj" 
  grid.bind="gridObj"
  columnDefinitions.bind="columnDefinitions" 
  gridOptions.bind="gridOptions" 
  dataset.bind="dataset">
</aurelia-slickgrid>

ViewModel

Hook yourself to the Changed event of the bindable grid object.

export class GridEditorComponent implements OnInit {
  gridObjChanged(grid) {
    this.gridObj = grid;
  }
}

How to use Grid/Dataview Events

Once the Grid and DataView are ready (via changed bindable events), you can subscribe to any SlickGrid Events (click to see the full list). See below for the gridChanged(grid) and dataviewChanged(dataview) functions.

• The GridExtraUtils is to bring easy access to common functionality like getting a column from it's row and cell index.
• The example shown below is subscribing to onClick and ask the user to confirm a delete, then will delete it from the DataView.
• Technically, the Grid and DataView are created at the same time by Aurelia-Slickgrid, so it's ok to call the dataViewObj within some code of the gridObjChanged() function since DataView object will already be available at that time.

Note The example below is demonstrated with bind with event Changed hook on the grid and dataview objects. However you can also use the EventAggregator as shown earlier. It's really up to you to choose the way you want to call these objects.

import { inject, bindable } from 'aurelia-framework';
import { Editors, Formatters, GridExtraUtils } from 'aurelia-slickgrid';

export class GridEditorComponent implements OnInit {
  @bindable() gridObj: any;
  @bindable() dataviewObj: any;
  columnDefinitions: Column[];
  gridOptions: GridOption;
  dataset: any[];  
  dataviewObj: any;

  constructor(private controlService: ControlAndPluginService) {
    // define the grid options & columns and then create the grid itself
    this.defineGrid();
  }

  defineGrid() {
    this.columnDefinitions = [
      { id: 'delete', field: 'id', formatter: Formatters.deleteIcon, maxWidth: 30 }
      // ...
    ];

    this.gridOptions = {
      editable: true,
      enableCellNavigation: true,
      autoEdit: true
    };
  }

  // with bindable Dataview and Changed event
  dataviewObjChanged(dataview) {
    this.dataviewObj = dataview;
  }

  // with bindable Grid and Changed event
  gridObjChanged(grid) {
    this.gridObj = grid;
    this.subscribeToSomeGridEvents(grid);
  }

  subscribeToSomeGridEvents(grid) {
    grid.onCellChange.subscribe((e, args) => {
      console.log('onCellChange', args);
      // for example, CRUD with WebAPI calls
    });

    grid.onClick.subscribe((e, args) => {
      const column = GridExtraUtils.getColumnDefinitionAndData(args);

      if (column.columnDef.id === 'delete') {
        if (confirm('Are you sure?')) {
          this.dataviewObj.deleteItem(column.dataContext.id);
          this.dataviewObj.refresh();
        }
      }
    });
  }
}