• Old Style Controls
  • MouseDefaults
  • MouseToolbar
  • Can't be turned off, only added to the map
  • Control of display is difficult
  • Not designed to be used with other tools
• New style controls
  • have activate/deactivate methods which turn handlers on/off
  • When activated, goes to front of event queue and handles events
  • when deactivated, removes event handlers
  • uses handler classes for most 'hard' work -- box, drag, etc. are done via callbacks
  • Support for 'button' types, which just have a 'trigger' method which causes an action to happen instantly.
  • examples
    • Navigation.js
    • NavToolbar.js

Implementing a new control:

• requires:
  • initialize()
  • draw
  • Tool types (have state)
    • activate()
    • deactivate()
  • Button Types
    • trigger
  • properties:
    • displayClass (a la olControlName) or CLASS_NAME (OpenLayers.Control.Name)