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|
#
# tk/optionobj.rb : control options for a group of widgets
#
# NOTE: If you want to use key-only option (no value),
# use Tk::None for the value of the key-only option.
#
# e.g. hash_kv({'aaa'=>1, 'bbb'=>Tk::None, 'ccc'=>3})
# => ["-aaa", 1, "-bbb", "-ccc", 3]
#
require 'tk'
module Tk
class OptionObj < Hash
include TkUtil
def initialize(hash = nil)
super()
@observ = []
update_without_notify(_symbolkey2str(hash)) if hash
end
def observ_info
@observ.dup
end
def observs
@observ.collect{|win|
if win.kind_of?(Array)
win[0]
else
win
end
}
end
def _remove_win(win)
if win.kind_of?(Array)
widget, method = win
@observ.delete_if{|x|
if x.kind_of?(Array)
x[0] == widget
else
x == widget
end
}
else
@observ.delete_if{|x|
if x.kind_of?(Array)
x[0] == win
else
x == win
end
}
end
end
private :_remove_win
def assign(*wins)
# win :=
# widget #==> call widget.configure(hash)
# [widget] #==> call widget.configure(hash)
# [widget, nil, {src=>target, ... }]
# #==> call widget.configure(hash)
# with converting hash-key
# [widget, method] #==> call widget.method(hash)
# [widget, method, {src=>target, ... }]
# #==> call widget.method(hash)
# with converting hash-key
# [widget [receiver, method, arg, ... ]]
# #==> call receiver.method(arg, ... , hash)
# [widget [receiver, method, arg, ... ], {src=>target, ... }]
# #==> call receiver.method(arg, ... , hash)
# with onverting hash-key
#
# src := option_name_on_optobj
#
# target :=
# nil #==> not use the src
# option_name_on_target_widget
# [ option_name_on_target_widget, ... ]
# #==> set all of them
#
wins.each{|win|
_remove_win(win)
@observ << win
notify(win)
}
self
end
def unassign(*wins)
wins.each{|win|
_remove_win(win)
}
self
end
def notify(target = nil)
if target
targets = [target]
elsif @observ.empty?
return self
else
targets = @observ.dup
end
return self if empty?
org_hash = _symbolkey2str(self)
targets.each{|win|
widget = receiver = win
hash = org_hash
begin
if win.kind_of?(Array)
widget, method, conv_tbl = win
receiver = widget
if conv_tbl
hash = {}
org_hash.each{|key, val|
key = conv_tbl[key] if conv_tbl.key?(key)
next unless key
if key.kind_of?(Array)
key.each{|k| hash[k] = val}
else
hash[key] = val
end
}
end
if method.kind_of?(Array)
receiver, method, *args = method
receiver.__send__(method, *(args << hash))
elsif method
widget.__send__(method, hash)
else
widget.configure(hash)
end
else
widget.configure(self)
end
rescue => e
if ( ( widget.kind_of?(TkObject) \
&& widget.respond_to?('exist?') \
&& ! receiver.exist? ) \
|| ( receiver.kind_of?(TkObject) \
&& receiver.respond_to?('exist?') \
&& ! receiver.exist? ) )
@observ.delete(win)
else
fail e
end
end
}
self
end
alias apply notify
def +(hash)
unless hash.kind_of?(Hash)
fail ArgumentError, "expect a Hash"
end
new_obj = self.dup
new_obj.update_without_notify(_symbolkey2str(hash))
new_obj
end
alias update_without_notify update
def update(hash)
update_without_notify(_symbolkey2str(hash))
notify
end
def configure(key, value=nil)
if key.kind_of?(Hash)
update(key)
else
store(key,value)
end
end
def [](key)
super(key.to_s)
end
alias cget []
def store(key, val)
key = key.to_s
super(key, val)
notify
end
def []=(key, val)
store(key,val)
end
def replace(hash)
super(_symbolkey2str(hash))
notify
end
def default(opt)
fail RuntimeError, "unknown option `#{opt}'"
end
private :default
undef :default=
end
end
|
