enum ItemType {
RegionItem,
StreamItem,
+ WaveItem,
PlayheadCursorItem,
MarkerItem,
MarkerBarItem,
StartCrossFadeItem,
EndCrossFadeItem,
CrossfadeViewItem,
+ TimecodeRulerItem,
+ MinsecRulerItem,
+ BBTRulerItem,
+ SamplesRulerItem,
+ DropZoneItem,
/* don't remove this */