ecomp-portal-FE/client/bower_components/jqTree/src/key_handler.coffee

   1 $ = jQuery
   2
   3
   4 class KeyHandler
   5     LEFT = 37
   6     UP = 38
   7     RIGHT = 39
   8     DOWN = 40
   9
  10     constructor: (tree_widget) ->
  11         @tree_widget = tree_widget
  12
  13         if tree_widget.options.keyboardSupport
  14             $(document).bind('keydown.jqtree', $.proxy(@handleKeyDown, this))
  15
  16     deinit: ->
  17         $(document).unbind('keydown.jqtree')
  18
  19     moveDown: ->
  20         node = @tree_widget.getSelectedNode()
  21
  22         if node
  23             return @selectNode(node.getNextNode())
  24         else
  25             return false
  26
  27     moveUp: ->
  28         node = @tree_widget.getSelectedNode()
  29
  30         if node
  31             return @selectNode(node.getPreviousNode())
  32         else
  33             return false
  34
  35     moveRight: ->
  36         node = @tree_widget.getSelectedNode()
  37
  38         if not node
  39             return true
  40         else if not node.isFolder()
  41             return true
  42         else
  43             # folder node
  44             if node.is_open
  45                 # Right moves to the first child of an open node
  46                 return @selectNode(node.getNextNode())
  47             else
  48                 # Right expands a closed node
  49                 @tree_widget.openNode(node)
  50                 return false
  51
  52     moveLeft: ->
  53         node = @tree_widget.getSelectedNode()
  54
  55         if not node
  56             return true
  57         else if node.isFolder() and node.is_open
  58             # Left on an open node closes the node
  59             @tree_widget.closeNode(node)
  60             return false
  61         else
  62             # Left on a closed or end node moves focus to the node's parent
  63             return @selectNode(node.getParent())
  64
  65     handleKeyDown: (e) ->
  66         if not @tree_widget.options.keyboardSupport
  67             return true
  68
  69         if $(document.activeElement).is('textarea,input,select')
  70             return true
  71
  72         if not @tree_widget.getSelectedNode()
  73             return true
  74
  75         key = e.which
  76
  77         switch key
  78             when DOWN
  79                 return @moveDown()
  80
  81             when UP
  82                 return @moveUp()
  83
  84             when RIGHT
  85                 return @moveRight()
  86
  87             when LEFT
  88                 return @moveLeft()
  89
  90         return true
  91
  92     selectNode: (node) =>
  93         if not node
  94             return true
  95         else
  96             @tree_widget.selectNode(node)
  97
  98             if (
  99                 @tree_widget.scroll_handler and
 100                 (not @tree_widget.scroll_handler.isScrolledIntoView($(node.element).find('.jqtree-element')))
 101             )
 102                 @tree_widget.scrollToNode(node)
 103
 104             return false
 105
 106
 107 module.exports = KeyHandler