# File tk/lib/tk/canvas.rb, line 700
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
# File tk/lib/tk/canvas.rb, line 632
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
# File tk/lib/tk/canvas.rb, line 713
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
# File tk/lib/tk/canvas.rb, line 743
def delete
@c.delete @id
CItemID_TBL.mutex.synchronize{
CItemID_TBL[@path].delete(@id) if CItemID_TBL[@path]
}
self
end