         @apply_dropper( @t( [ e.getX(), e.getY() ] )..., e )
         null
       )
+      @getEl().on( 'mousemove', ( e ) =>
+        @move_dropper( @t( [ e.getX(), e.getY() ] )..., e )
+        null
+      )
     )
 
     @keymap = Ext.create( 'Ext.util.KeyMap', target: Ext.getDoc() )


  # Load a function into the dropper.
  #
  # @param [function(x, y, event)] Event to load.
  # @return [Oghma.App] this
  load_dropper: ( f ) ->
    @dropper = f
    document.body.style.cursor = 'crosshair'
    this


  # @param [Object] e Event
  # @return [Oghma.App] this
  apply_dropper: ( x, y, e = null ) ->
    original_dropper_click = @dropper_click
    if ! e? || ! e.altKey
      @unload_dropper()
    original_dropper_click?( x, y, e )
    this

  # Add a binding.
