Module: TkEvent

Included in:
TkComm, TkComm
Defined in:
ext/lib/tk/event.rb,
ext/lib/tk/event.rb

Overview

tk/event.rb - module for event

Defined Under Namespace

Classes: Event

Instance Method Summary collapse

Instance Method Details

#install_bind(cmd, *args) ⇒ Object 



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# File 'ext/lib/tk/event.rb', line 539

def install_bind(cmd, *args)
  install_bind_for_event_class(TkEvent::Event, cmd, *args)
end

#install_bind_for_event_class(klass, cmd, *args) ⇒ Object 



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# File 'ext/lib/tk/event.rb', line 457

def install_bind_for_event_class(klass, cmd, *args)
  extra_args_tbl = klass._get_extra_args_tbl

  if args.compact.size > 0
    args.map!{|arg| klass._sym2subst(arg)}
    args = args.join(' ')
    keys = klass._get_subst_key(args)

    if cmd.kind_of?(String)
      id = cmd
    elsif cmd.kind_of?(TkCallbackEntry)
      id = install_cmd(cmd)
    else
      id = install_cmd(proc{|*arg|
        ex_args = []
        extra_args_tbl.reverse_each{|conv| ex_args << conv.call(arg.pop)}
        begin
          TkUtil.eval_cmd(cmd, *(ex_args.concat(klass.scan_args(keys, arg))))
        rescue Exception=>e
          if TkCore::INTERP.kind_of?(TclTkIp)
            fail e
          else
            # MultiTkIp
            fail Exception, "#{e.class}: #{e.message.dup}"
          end
        end
      })
    end
  else
    keys, args = klass._get_all_subst_keys

    if cmd.kind_of?(String)
      id = cmd
    elsif cmd.kind_of?(TkCallbackEntry)
      id = install_cmd(cmd)
    else
      id = install_cmd(proc{|*arg|
        ex_args = []
        extra_args_tbl.reverse_each{|conv| ex_args << conv.call(arg.pop)}
        begin
          TkUtil.eval_cmd(cmd, *(ex_args << klass.new(*klass.scan_args(keys, arg))))
        rescue Exception=>e
          if TkCore::INTERP.kind_of?(TclTkIp)
            fail e
          else
            # MultiTkIp
            fail Exception, "#{e.class}: #{e.message.dup}"
          end
        end
      })
    end
  end

  if TkCore::INTERP.kind_of?(TclTkIp)
    id + ' ' + args
  else
    # MultiTkIp
    "if {[set st [catch {#{id} #{args}} ret]] != 0} {
       if {$st == 4} {
         return -code continue $ret
       } elseif {$st == 3} {
         return -code break $ret
       } elseif {$st == 2} {
         return -code return $ret
       } elseif {[regexp {^Exception: (TkCallbackContinue: .*)$} \
                                                             $ret m msg]} {
         return -code continue $msg
       } elseif {[regexp {^Exception: (TkCallbackBreak: .*)$} $ret m msg]} {
         return -code break $msg
       } elseif {[regexp {^Exception: (TkCallbackReturn: .*)$} $ret m msg]} {
         return -code return $msg
       } elseif {[regexp {^Exception: (\\S+: .*)$} $ret m msg]} {
         return -code return $msg
       } else {
         return -code error $ret
       }
     } else {
        set ret
     }"
  end
end