• Low level drag machine
    • gather mouse information
    • manage event capture environment
    • differentiate drag from click
    • send update events
    • handle cancellation events / messages
    • look for mouse up
    • send finish events
  • Drag and drop system (one possible flavor)
    • process drag update events
      • display drag avatar
      • display drop hints
      • manage target selection
    • post processing
  • Resizing system (one possible flavor)
    • process drag update events
      • display resize hint
    • post processing