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World Tree

The World Tree is OpenTree's core data organization method, managing all user data in a tree structure.

Design Philosophy​

The World Tree draws inspiration from the "Yggdrasil" of Norse mythology—a giant tree connecting all worlds. In OpenTree, the World Tree connects all types of data:

World Tree
├── 🔑 Keychain (keychain)
├── ⭐ Favorites (favorites)
├── 📝 Notes (notes)
├── 🎵 Music (music)
├── 🖼 Album (album)
├── ⏰ Countdown (countdown)
├── ✅ Tasks (todo)
├── 💰 Wallet (wallet)
├── 💳 Card Holder (cardHolder)
└── 📇 Address Book (address)

Data Flow​

Tree Nodes​

Each data item is a tree node, supporting:

  • Nested hierarchy (folders/sub-items)
  • Drag-and-drop sorting
  • Context menu
  • Search filtering
  • Tag system

Caching​

The World Tree panel uses in-memory caching to reduce database queries:

  • Loads all data on first open
  • Invalidates cache after CRUD operations (invalidateCache)
  • Reloads from database on next access