samples/elaborate/login.rb
# Copyright (c) 2007-2023 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-swt'
class LoginPresenter
attr_accessor :user_name
attr_accessor :password
attr_accessor :status
def initialize
@user_name = ""
@password = ""
@status = "Logged Out"
end
def status=(status)
@status = status
end
def valid?
!@user_name.to_s.strip.empty? && !@password.to_s.strip.empty?
end
def logged_in?
self.status == "Logged In"
end
def logged_out?
!self.logged_in?
end
def login!
return unless valid?
self.status = "Logged In"
end
def logout!
self.user_name = ""
self.password = ""
self.status = "Logged Out"
end
end
class Login
include Glimmer::UI::CustomShell
before_body do
@presenter = LoginPresenter.new
end
body {
shell {
text "Login"
composite {
grid_layout 2, false #two columns with differing widths
label { text "Username:" } # goes in column 1
@user_name_text = text { # goes in column 2
text <=> [@presenter, :user_name]
enabled <= [@presenter, :logged_out?, computed_by: :status]
on_key_pressed do |event|
@password_text.set_focus if event.keyCode == swt(:cr)
end
}
label { text "Password:" }
@password_text = text(:password, :border) {
text <=> [@presenter, :password]
enabled <= [@presenter, :logged_out?, computed_by: :status]
on_key_pressed do |event|
@presenter.login! if event.keyCode == swt(:cr)
end
}
label { text "Status:" }
label { text <= [@presenter, :status] }
button {
text "Login"
enabled <= [@presenter, :logged_out?, computed_by: :status]
on_widget_selected do
@presenter.login!
end
on_key_pressed do |event|
if event.keyCode == swt(:cr)
@presenter.login!
end
end
}
button {
text "Logout"
enabled <= [@presenter, :logged_in?, computed_by: :status]
on_widget_selected do
@presenter.logout!
end
on_key_pressed do |event|
if event.keyCode == swt(:cr)
@presenter.logout!
@user_name_text.set_focus
end
end
}
}
}
}
end
Login.launch