class TkVarAccess - tk-0.2.0 Documentation

# class TkVarAccess

### Public Class Methods

new(name, *args) click to toggle source

    # File lib/tk/variable.rb, line 1653
    def self.new(name, *args)
      if name.kind_of?(TkVariable)
        name.value = args[0] unless args.empty?
        return name
      end

      name = name.to_s
      v = nil
      TkVar_ID_TBL.mutex.synchronize{
        if v = TkVar_ID_TBL[name]
          v.value = args[0] unless args.empty?
          return v
        else
          (v = self.allocate).instance_eval{
            @id = name
            TkVar_ID_TBL[@id] = self
            @var = @id
          }
        end
      }

      v.instance_eval{ initialize(name, *args) }
      v
    end

new(varname, val=nil) click to toggle source

    # File lib/tk/variable.rb, line 1714
      def initialize(varname, val=nil)
        # @id = varname
        # TkVar_ID_TBL[@id] = self

        # @var  = @id
        @elem = nil

        @def_default = false
        @default_val = nil

        @trace_var  = nil
        @trace_elem = nil
        @trace_opts = nil

        @type = nil
        var = self
        @element_type = Hash.new{|k,v| var.default_value_type }

        # is an element?
        if @id =~ /^([^(]+)\((.+)\)$/
          # is an element --> var == $1, elem == $2
          @var  = $1
          @elem = $2
        end

        # teach Tk-ip that @id is global var
        INTERP._invoke_without_enc('global', @var)
    =begin
        begin
          INTERP._invoke_without_enc('global', @id)
        rescue => e
          if @id =~ /^(.+)\([^()]+\)$/
            # is an element --> varname == $1
            INTERP._invoke_without_enc('global', $1)
          else
            fail e
          end
        end
    =end

        if val
          if val.kind_of?(Hash)
            # assoc-array variable
            self[''] = 0
            self.clear
          end
          #s = '"' + _get_eval_string(val).gsub(/[\[\]$"]/, '\\\\\&') + '"' #"
          #s = '"' + _get_eval_string(val).gsub(/[\[\]$"\\]/, '\\\\\&') + '"' #"
          #INTERP._eval(Kernel.format('global %s; set %s %s', @id, @id, s))
          #INTERP._set_global_var(@id, _toUTF8(_get_eval_string(val)))
          self.value = val
        end
      end

new_hash(name, *args) click to toggle source

    # File lib/tk/variable.rb, line 1678
    def self.new_hash(name, *args)
      if name.kind_of?(TkVariable)
        unless name.is_hash?
          fail ArgumentError, "already exist as a scalar variable"
        end
        name.value = args[0] unless args.empty?
        return name
      end

      name = name.to_s
      v = nil
      TkVar_ID_TBL.mutex.synchronize{
        if v = TkVar_ID_TBL[name]
          unless v.is_hash?
            fail ArgumentError, "already exist as a scalar variable"
          end
          v.value = args[0] unless args.empty?
          return v
        else
          (v = self.allocate).instance_eval{
            @id = name
            TkVar_ID_TBL[@id] = self
            @var = @id
          }
        end
      }

      INTERP._invoke_without_enc('global', name)
      if args.empty? && INTERP._invoke_without_enc('array', 'exist', name) == '0'
        v.instance_eval{ initialize(name, {}) }  # force creating
      else
        v.instance_eval{ initialize(name, *args) }
      end
      v
    end