TkcItem

Constants

CItemID_TBL
CItemTypeName
CItemTypeToClass

Public Class Methods

create(canvas, *args)

 
               # File tk/lib/tk/canvas.rb, line 731
def self.create(canvas, *args)
  unless self::CItemTypeName
    fail RuntimeError, "#{self} is an abstract class"
  end
  args, fontkeys, methodkeys = _parse_create_args(args)
  idnum = tk_call_without_enc(canvas.path, 'create',
                              self::CItemTypeName, *args)
  canvas.itemconfigure(idnum, fontkeys) unless fontkeys.empty?
  canvas.itemconfigure(idnum, methodkeys) unless methodkeys.empty?
  idnum.to_i  # 'canvas item id' is an integer number
end

id2obj(canvas, id)

 
               # File tk/lib/tk/canvas.rb, line 663
def TkcItem.id2obj(canvas, id)
  cpath = canvas.path
  CItemID_TBL.mutex.synchronize{
    if CItemID_TBL[cpath]
      CItemID_TBL[cpath][id]? CItemID_TBL[cpath][id]: id
    else
      id
    end
  }
end

new(parent, *args)

 
               # File tk/lib/tk/canvas.rb, line 744
def initialize(parent, *args)
  #unless parent.kind_of?(Tk::Canvas)
  #  fail ArgumentError, "expect Tk::Canvas for 1st argument"
  #end
  @parent = @c = parent
  @path = parent.path

  @id = create_self(*args) # an integer number as 'canvas item id'
  CItemID_TBL.mutex.synchronize{
    CItemID_TBL[@path] = {} unless CItemID_TBL[@path]
    CItemID_TBL[@path][@id] = self
  }
end

type2class(type)

 
               # File tk/lib/tk/canvas.rb, line 659
def TkcItem.type2class(type)
  CItemTypeToClass[type]
end

Public Instance Methods

delete()

 
               # File tk/lib/tk/canvas.rb, line 774
def delete
  @c.delete @id
  CItemID_TBL.mutex.synchronize{
    CItemID_TBL[@path].delete(@id) if CItemID_TBL[@path]
  }
  self
end

Also aliased as: remove, destroy

destroy()

Alias for: delete

exist?()

 
               # File tk/lib/tk/canvas.rb, line 766
def exist?
  if @c.find_withtag(@id)
    true
  else
    false
  end
end

id()

 
               # File tk/lib/tk/canvas.rb, line 762
def id
  @id
end

remove()

Alias for: delete

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TkcItem

Constants

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Public Instance Methods