public BarRendererBase(Bar bar) { Bar = bar; IsEmpty = true; _preBeatGlyphs = new LeftToRightLayoutingGlyphGroup(); _preBeatGlyphs.Renderer = this; _voiceContainers = new FastDictionary<int, VoiceContainerGlyph>(); _postBeatGlyphs = new LeftToRightLayoutingGlyphGroup(); _postBeatGlyphs.Renderer = this; }