Method rebuild

packages/playground/src/components/TrackList.ts:29–55

(score: alphaTab.model.Score)

    }

    private rebuild(score: alphaTab.model.Score): void {
        for (const item of this.items) {
            item.dispose();
        }
        this.items = [];
        this.root.replaceChildren();
        this.selection.clear();

        for (const track of score.tracks) {
            const item = new TrackItem(this.api, track);
            item.onSelect = e => {
                e.stopPropagation();
                if (!e.ctrlKey) {
                    this.selection.clear();
                    this.selection.set(track.index, track);
                } else if (this.selection.has(track.index)) {
                    this.selection.delete(track.index);
                } else {
                    this.selection.set(track.index, track);
                }
                this.api.renderTracks(Array.from(this.selection.values()).sort((a, b) => a.index - b.index));
            };
            this.items.push(item);
            this.root.appendChild(item.root);
        }
        this.refreshActive();
    }

    private refreshActive(): void {
        const active = new Set<number>();