topic Why is my grid undefined? in Web AppBuilder Custom Widgets Questions

Why is my grid undefined?

KenBuja — Sun, 12 Dec 2021 08:47:14 GMT

In my widget, I'm creating a grid that will hold summary information on a feature layer. The grid is added to the widget, but the variable I have it assigned to is undefined. Where is my logic going wrong on this?

Here is where I'm initialize the variable names

    return declare([BaseWidget, _WidgetsInTemplateMixin], {

      baseClass: 'jimu-widget-spatialprioritization',
      name: 'Spatial Prioritization',
      _togSignin: null,
      _gridTotals: null,
      _layerSPGrid: null,
      _arrayTotals: null,
      _SPGridUrl: null,
      _rendererPriority: null,‍‍‍‍‍‍‍‍‍‍

and later on, here's where I instantiate the grid once the layer is loaded

      this._layerSPGrid.on("load", lang.hitch(this, function () {
        this._createTotalGrid();
      }));
 
      _createTotalGrid: function () {
        this._gridTotals = new Grid({
          id: 'gridPriority',
          columns: {
            priority: { label: "Priority", sortable: false },
            existing: { label: "Current", sortable: false },
            selected: { label: "Selected", sortable: false }
          },
          className: "gridpriority"
        }, this.totalGrid).startup();
        this._updateGridFeatures([]);
      },‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

The empty grid is added to the panel, but its reference is undefined. Why is that?

Re: Why is my grid undefined?

RobertScheitlin__GISP — Fri, 12 May 2017 19:55:08 GMT

Ken,

Nothing is jumping out. You have a div with data-dojo-attach-point="totalGrid" in your widget.html right?

Re: Why is my grid undefined?

KenBuja — Fri, 12 May 2017 20:01:35 GMT

Yes I do. The grid is attached to the panel, as shown in the screenshot.

Re: Why is my grid undefined?

RobertScheitlin__GISP — Fri, 12 May 2017 20:33:49 GMT

Ken,

Is it just a timing issue? If you wait longer is the var not null?

Re: Why is my grid undefined?

KenBuja — Fri, 12 May 2017 21:08:09 GMT

Unfortunately not. When I click the Signout button, I have a line to destroy the dijit. But it's still undefined there (not just null).

Re: Why is my grid undefined?

RobertScheitlin__GISP — Fri, 12 May 2017 21:22:33 GMT

Ken,

Just out of curiosity what happen if you move the startup to another line instead of chaining it like you have.

Re: Why is my grid undefined?

KenBuja — Fri, 12 May 2017 21:34:55 GMT

That appears to have done it. Which leads to another question, but I'll start that in a separate thread next week.

Thanks for your help, Robert!