 
 
   mousedown: (pos, idx, t) ->
-    for n in @nodes
-      if n.isHit(pos)
-        if @merging?
-          if n isnt @merging.node
-            @mergeNodes(@merging.node, n)
-            @merging = null
-
-            return true
-
-    if @merging?
-      @merging = null
-
     # try moving nodes
     for n in @nodes
       hit = n.tryAll( (node) ->

canvas.addEventListener 'mouseup', (e) ->
  t = Date.now()/1000
  pos = getCursorPosition(canvas, e)
  for collection in collections
    collection.mouseup(pos, t)

    if @isHandleHit(pos, idx)
      @dropdown_menu = {
        pos: pos
        options: @collection_dropdown_menu
        selected: -1
      }
    return false
