samples/hello/hello_checkbutton.rb
# Copyright (c) 2020-2022 Andy Maleh
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
require 'glimmer-dsl-tk'
class HelloCheckbutton
class Person
attr_accessor :skiing, :snowboarding, :snowmobiling, :snowshoeing, :snow_activities, :snow_activities_alternate
def initialize
reset_activities!
individual_observer = Glimmer::DataBinding::Observer.proc do
unless @updating_group
@updating_individual = true
if skiing && snowboarding && snowmobiling && snowshoeing
self.snow_activities = true
self.snow_activities_alternate = false
elsif skiing || snowboarding || snowmobiling || snowshoeing
self.snow_activities = true
self.snow_activities_alternate = true
else
self.snow_activities = false
self.snow_activities_alternate = false
end
@updating_individual = false
end
end
individual_observer.observe(self, :skiing)
individual_observer.observe(self, :snowboarding)
individual_observer.observe(self, :snowmobiling)
individual_observer.observe(self, :snowshoeing)
group_observer = Glimmer::DataBinding::Observer.proc do
unless @updating_individual
@updating_group = true
self.skiing = self.snow_activities
self.snowboarding = self.snow_activities
self.snowmobiling = self.snow_activities
self.snowshoeing = self.snow_activities
@updating_group = false
end
end
group_observer.observe(self, :snow_activities)
end
def reset_activities!
self.snow_activities = true
self.snow_activities_alternate = true
self.skiing = false
self.snowboarding = true
self.snowmobiling = false
self.snowshoeing = false
end
end
include Glimmer
def initialize
@person = Person.new
end
def launch
root {
title 'Hello, Checkbutton!'
label {
text 'Check all snow activities you are interested in:'
font 'caption'
}
frame {
checkbutton {
text 'Snow Activities'
variable <=> [@person, :snow_activities]
alternate <=> [@person, :snow_activities_alternate] # binds half-checked state
}
frame {
checkbutton {
text 'Skiing'
variable <=> [@person, :skiing]
}
checkbutton {
text 'Snowboarding'
variable <=> [@person, :snowboarding]
}
checkbutton {
text 'Snowmobiling'
variable <=> [@person, :snowmobiling]
}
checkbutton {
text 'Snowshoeing'
variable <=> [@person, :snowshoeing]
}
}
}
button {
text 'Reset Activities'
command do
@person.reset_activities!
end
}
}.open
end
end
HelloCheckbutton.new.launch