Method activate

docs/app/js/sanddance-app.js:9930–9937

* Set one data row to the active state.

(datum)

    /**
     * Set one data row to the active state.
     */ activate(datum) {
        return new Promise((resolve, reject)=>{
            this._animator.activate(datum).then(()=>{
                this._details.render();
                resolve();
            });
        });
    }
    /**
     * Deactivate item.
     */ deActivate() {