Method viewerMounted

packages/sanddance-explorer/src/explorer.tsx:872–877

(glDiv: HTMLElement)

        }

        private viewerMounted(glDiv: HTMLElement) {
            this.setState({
                size: this.getLayoutDivSize(this.state.sidebarPinned, this.state.sidebarClosed),
                signalValues: this.state.signalValues, //keep initialized signalValues
            });
        }

        private getLayoutDivSize(pinned: boolean, closed: boolean) {
            const div = pinned && !closed ? this.layoutDivPinned : this.layoutDivUnpinned;