TSC and 4x: Basemap Gallery in a Dijit Dialog?

[DirkVandervoort]

Greetings fellow travelers!

I'm trying write a custom widget that puts a Basemap Gallery in a Dijit Dialog. My debugger tells me the Basemap Gallery is fully hydrated and available, yet my UI tells me otherwise: 

In HTML:

var basemapGalleryInADialog = new BasemapGalleryInADialog({
 view:view
 });
 view.ui.add(basemapGalleryInADialog, "top-left");‍‍‍‍

The TypeScript widget class:

/// <amd-dependency path="esri/core/tsSupport/declareExtendsHelper" name="__extends" />
/// <amd-dependency path="esri/core/tsSupport/decorateHelper" name="__decorate" />

import {aliasOf, subclass, property, declared} from "esri/core/accessorSupport/decorators";
import {accessibleHandler, jsxFactory, renderable, vmEvent} from "esri/widgets/support/widget";

import Widget = require("esri/widgets/Widget");
import MapView = require("esri/views/MapView");
import SceneView = require("esri/views/SceneView");
import BasemapGallery = require("esri/widgets/BasemapGallery");

import Dialog = require("dijit/Dialog");

const CSS = {
 base: "esri-home esri-widget-button esri-widget",
 text: "esri-icon-font-fallback-text",
 basemapIcon: "esri-icon esri-icon-basemap",
 loadingIcon: "esri-icon-loading-indicator",
 rotatingIcon: "esri-rotating",
 disabled: "esri-disabled"
};

@subclass("esri.widgets.Widget") 
class BasemapGalleryInADialog extends declared(Widget) {

 //--------------------------------------------------------------------------
 //
 // Lifecycle
 //
 //--------------------------------------------------------------------------
 /**
 * @constructor
 * @alias module:esri/widgets/Widget
 * @extends module:esri/widgets/Widget
 * @param {Object} [properties] - See the [properties](#properties-summary) for a list of all the properties
 * that may be passed into the constructor.
 */
 constructor(params?: any) {
 super();
 }

 //--------------------------------------------------------------------------
 //
 // Properties
 //
 //--------------------------------------------------------------------------
 //----------------------------------
 // view
 //----------------------------------
 /**
 * A reference to the {@link module:esri/views/MapView} or {@link module:esri/views/SceneView}. Set this to link the widget to a specific view.
 *
 * @type {module:esri/views/MapView | module:esri/views/SceneView}
 *
 * @name view
 * @instance
 */
 @property()
 @renderable()
 view: MapView | SceneView = null;

 //--------------------------------------------------------------------------
 //
 // Public Methods
 //
 //--------------------------------------------------------------------------
 go() {
 var basemapGallery = new BasemapGallery({
 view: this.view
 });

 var myDialog = new Dialog({
 title: "Basemap Gallery",
 content: basemapGallery
 });
 myDialog.show();
 }

 render() {
 return (
 <div bind={this} class={CSS.base}role="button" tabIndex={0} onclick={this._go} onkeydown={this._go}>
 <span aria-hidden="true" class={CSS.basemapIcon} title="Basemap Gallery" />
 <span class={CSS.text}>Basemap Gallery</span>
 </div>
 );
 }

 //--------------------------------------------------------------------------
 //
 // Private Methods
 //
 //--------------------------------------------------------------------------
 @accessibleHandler()
 private _go() {
 this.go();
 }
}

export = BasemapGalleryInADialog;‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

I'm just messing around with the UX and I thought I'd open this pattern up for discussion, help, etc. TIA

[KellyHutchins · Accepted solution]

I setup a quick test and it worked for me once I added a container for the basemap gallery.  Here's the code I modified from  your example. 

        var basemapGallery = new BasemapGallery({
            view: this.view,
            container: document.createElement("div")
        });
        var myDialog = new Dialog({
            title: "Basemap Gallery",
            content: basemapGallery
        });
        myDialog.show();‍‍‍‍‍‍‍‍‍

[DirkVandervoort]

BOOM. Thanks Kelly!