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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <input type="text" name = "title" placeholder="new node" id="node-title" />
<input type="button" value="add node" id="add-node" />
<label for="edge-mode">
  <input type="checkbox" id="edge-mode" />edge
</label>
<div id="container"></div>

            
          
!
            
              #container {
  border: 1px solid #000;
  width: 600px;
  height: 350px;
}

label, input[type='checkbox'] {
    cursor: pointer;
}

            
          
!
            
              class Node
  constructor: (@title, @xpos, @ypos, @width, @height, @id) ->
  centerX: -> @xpos + @width/2
  centerY: -> @ypos + @height/2
  show: -> "title:#{@title} :#{@xpos} y:#{@ypos} width:#{@width} height:#{@height}"

class Edge
  constructor: (@from, @to, @id) ->
  @startx: 0
  @starty: 0
  @endx: 0
  @endy: 0
  show: ->
    "from:#{@from}(#{@startx}, #{@starty}) to:#{@to}(#{@endx}, #{@endy})"

@Nodes = []
@Edges = []

class EdgeAdding
  @enabled: false
  @adding: false
  @startx: 0
  @starty: 0
  @endx: 0
  @endy: 0
  @from: ''
  @to: ''
  started: ->
    @adding is true
  start: ->
    @adding = true
  end: ->
    @adding = false
  fromAttr: (edgeId)-> 
    edge = new Edge(@from, @to, edgeId)
    edge.startx = @startx
    edge.starty = @starty
    edge.endx = @endx
    edge.endy = @endy
    edge

@edgeAdding = new EdgeAdding()

@dragContext =
  nodeId:0
  node: null
  froms: []
  tos: []

class Sequence
  constructor: (@nodeSeq, @edgeSeq) ->
  getNodeSeq: ->
    @nodeSeq++
  getEdgeSeq: ->
    @edgeSeq++
@sequence = new Sequence(0, 0)

class Graph
  addNode: (title) ->
    id = sequence.getNodeSeq()
    node = new Node title, konvaStage.randomX(), konvaStage.randomY(), 0, 0, id
    shape = konvaFactory.createShape(node, id)
    node.width = shape.width()
    node.height = shape.height()
    console.log node.show()
    konvaStage.registerShape shape
    Nodes.push node
    id

  addEdge: ->
    edge = edgeAdding.fromAttr(sequence.getEdgeSeq())
    this.addEdgeInternal edge

  addEdgeByIds: (fromId, toId) ->
    edgeId = sequence.getEdgeSeq()
    edge = new Edge(fromId, toId, edgeId)
    fromNode = _.find Nodes, (node) -> node.id == fromId
    toNode = _.find Nodes, (node) -> node.id == toId
    edge.startx = fromNode.centerX()
    edge.starty = fromNode.centerY()
    edge.endx = toNode.centerX()
    edge.endy = toNode.centerY()
    this.addEdgeInternal edge

  addEdgeInternal: (newEdge) ->
    edge = _.find Edges, (e) ->
      e.from is newEdge.from && e.to is newEdge.to || e.from is newEdge.to && e.to is newEdge.from
    if !edge?
      Edges.push newEdge
      console.log newEdge.show()
      konvaStage.registerLine konvaFactory.createLine newEdge
    else
      console.log "edge already exists.."

  moveNode: ->
    id = dragContext.nodeId
    x = dragContext.node.xpos
    y = dragContext.node.ypos
    node = _.find Nodes, (node) -> node.id == id
    node.xpos = x
    node.ypos = y

  moveEdges: ->
    x = dragContext.node.centerX()
    y = dragContext.node.centerY()
    _.each dragContext.froms, (edge) ->
      edge.startx = x
      edge.starty = y
    _.each dragContext.tos, (edge) ->
      edge.endx = x
      edge.endy = y

  getNode: (id) ->
    _.find Nodes, (node) -> node.id == id

  findEdgesFrom: (nodeId) ->
    _.filter Edges, (edge) -> edge.from == nodeId

  findEdgesTo: (nodeId) ->
    _.filter Edges, (edge) -> edge.to == nodeId

@graph = new Graph

class KonvaStage
  constructor: ->
    @stage = new Konva.Stage({
      container  : container
      width      : 600
      height     : 350
    })
    @layer = new Konva.Layer()
    .on 'mouseup tap', (event) ->
      layerEdgeAction(event)
    @stage.add @layer
  randomX: ->
    parseInt Math.random()*(@stage.getWidth() / 2)
  randomY: ->
    parseInt Math.random()*(@stage.getHeight() / 2)
  registerShape: (label) ->
    @layer.add label
    applyTweenTo label.getTag()
    applyTweenTo label.getText()
    @layer.draw()
  registerLine: (line) ->
    @layer.add line
    line.moveToBottom()
    @layer.draw()
  applyTweenTo = (node) ->
    node.tween = new Konva.Tween({
      node: node
      scaleX: 1.2
      scaleY: 1.2
      easing: Konva.Easings.EaseInOut
      duration: 0.5
    })
  dragEdges: ->
    l = @layer
    n = dragContext.node
    _.each dragContext.froms, (from) ->
      edgeId = from.id
      line = l.find("##{edgeId}")[0]
      if line
        points = line.attrs.points
        line.points [n.centerX(), n.centerY(), points[2], points[3]]
        l.draw()
    _.each dragContext.tos, (to) ->
      edgeId = to.id
      line = l.find("##{edgeId}")[0]
      if line
        points = line.attrs.points
        line.points [points[0], points[1], n.centerX(), n.centerY()]
        l.draw()

layerEdgeAction = (event) ->
  if !edgeAdding.enabled
    return
  if !edgeAdding.started()
    edgeAdding.start()
  else
    edgeAdding.end()
    if edgeAdding.from is edgeAdding.to
      return
    graph.addEdge()
    edgeAdding.enabled = false
    $("#edge-mode").prop("checked", false)

@konvaStage = new KonvaStage

class KonvaFactory
  createShape: (graphNode, id) ->
    new Konva.Label({
      x: graphNode.xpos
      y: graphNode.ypos
      width: 100
      height: 50
      draggable: true
      id: id
      name: graphNode.title
    })
    .on 'dragstart', () ->
      dragStartAction(@)
    .on 'dragmove', () ->
      dragMoveAction(@)
    .on 'dragend', () ->
      dragEndAction(@)
    .on 'mouseover touchstart', () ->
      document.body.style.cursor = 'pointer'
      if edgeAdding.enabled
        @getTag().tween.play()
        @getText().tween.play()
    .on 'mouseout touchend', () ->
      document.body.style.cursor = 'default'
      if edgeAdding.enabled
        @getTag().tween.reverse()
        @getText().tween.reverse()
    .on 'mouseup tap', (event) ->
      labelEdgeAction(event, @)
    .add new Konva.Tag({
      fill: ((length) ->
        n = parseInt Math.random() * Math.floor(5)
        if n ==  0
          '#CEF6CE' # 緑
        else if n == 1
          '#F5A9A9' # ピンク
        else if n == 2
          '#F6CEF5' # 紫
        else if n == 3
          '#F2F5A9' # 黄
        else
          '#FFFFFF' # 白
        )(graphNode.title.length)
      stroke: 'black'
      strokeWidth: 4
    })
    .add new Konva.Text({
      text: graphNode.title
      fontSize: 14
      padding: 8
      fill: 'black'
    })

  createLine: (edge) ->
    line = new Konva.Line({
      points: [edge.startx, edge.starty, edge.endx, edge.endy]
      stroke: 'black'
      strokeWidth: 4
      id: edge.id
      name: 'test'
    })

labelEdgeAction = (event, shape) ->
  if edgeAdding.enabled
    if !edgeAdding.started()
      edgeAdding.from = shape.getId()
      edgeAdding.startx = shape.x() + shape.width()/2
      edgeAdding.starty = shape.y() + shape.height()/2
    else if edgeAdding.started()
      edgeAdding.to = shape.getId()
      edgeAdding.endx = shape.x() + shape.width()/2
      edgeAdding.endy = shape.y() + shape.height()/2

dragStartAction = (shape) ->
  dragContext.nodeId = shape.getId()
  node = graph.getNode shape.getId()
  console.log "drag began. - #{node.title}"
  if node
    node.xpos = shape.x()
    node.ypos = shape.y()
    dragContext.node = node
    dragContext.froms = graph.findEdgesFrom shape.getId()
    dragContext.tos = graph.findEdgesTo shape.getId()

dragMoveAction = (shape) ->
  dragContext.node.xpos = shape.x()
  dragContext.node.ypos = shape.y()
  konvaStage.dragEdges()

dragEndAction = (shape) ->
  console.log 'drag End.'
  #console.log dragContext
  dragContext.node.xpos = shape.x()
  dragContext.node.ypos = shape.y()
  graph.moveNode()
  konvaStage.dragEdges()
  graph.moveEdges()

@konvaFactory = new KonvaFactory

append = () ->
  title = $('#node-title').val()
  if title != ''
    graph.addNode title
    $('#node-title').val ''

$('#add-node').click -> append()

$('#node-title').keypress (key)->
  if key.charCode == 13
    append()

$("#edge-mode").click ->
  edgeAdding.enabled = $("#edge-mode").prop("checked")
  console.log "edge mode:" + $("#edge-mode").prop("checked")

funa = graph.addNode 'ふなっしー'
hyaha = graph.addNode 'ヒャッハー ヒャッハー'
shiru = graph.addNode '梨汁プシャー'
graph.addEdgeByIds funa, hyaha
graph.addEdgeByIds funa, shiru

            
          
!
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