enum OPERATIONTYPE { NONE = 0, MOVE = 1, RESIZESTART = 2, RESIZEEND = 3, FADEIN = 4, FADEOUT = 5, TRANSITIONSTART = 6, TRANSITIONEND = 7};
enum CLIPTYPE { UNKNOWN = 0, AUDIO = 1, VIDEO = 2, AV = 3, COLOR = 4, IMAGE = 5, TEXT = 6, SLIDESHOW = 7, VIRTUAL = 8, PLAYLIST = 9};
+enum GRAPHICSRECTITEM { AVWIDGET = 70000 , LABELWIDGET , TRANSITIONWIDGET };
enum TRANSITIONTYPE {
/** TRANSITIONTYPE: between 0-99: video trans, 100-199: video+audio trans, 200-299: audio trans */