Shoes ; notation ; Ruby

メモ記事御免

self object

Shoes.app do
  stack do
    para 'HelloWorld'
    para 'Thanks'
  end
end

• changes self object
  • app block
  • window and dialog methods
• not changes self object
  • stack block

because of the fact source

Shoes.app do
  self.stack do
    self.para 'HelloWorld'
    self.para 'Thanks'
  end
end

• Whenever you create a new window, self is also changed.

Shoes.app title: "MAIN" do
  para self
  button "Spawn" do
    window title: "CHILD" do
      para self
    end
  end
end

Instance variable

• instance variable ends up in app block

Shoes.app do
  @var = 30 # only within this block
end

stack

Shoes.app do
  stack do
    para "First"
    para "Second"
    para "Third"
  end
end

• When attach a stack and give it a block, the App object places that stack in its memory.

• The stack gets popped off when block ends up.

• All drawing inside the block gets redirected from the App's top slot to the new stack.

External Module and methods

• Tell app to change itself by method '.app'

• each Shoes object has an app method that will let you reopen the App object

• Without the method, app will not change even you meant to 'change' with 'stack

works ; Messenger can tell app to invoke para
class Messenger
  def initialize(stack)
    @stack = stack
  end
  def add(msg)
    @stack.app do
      @stack.append do
        para msg
      end
    end
  end
end

not work ; Messenger couldn't tell app to invoke para class Messenger def initialize(stack) @stack = stack end def add(msg) @stack.append do para msg end end end

Fixed Heights

• Fixed heights on slots should be less common
  • the slot becomes a nested window
  • A new layer is created by the operating system to keep the slot in a fixed square.

UTF-8

• cut down on the amount of conversion
• Shoes expects all strings to be in UTF-8 format.

Main App and reuquire

class Storage; end
Shoes.app do
   para Storage.new
end

• keep your temporary classes in the code with the app and keep your permanent classes in requires.

• Storage class will dispappear once the app complets.

  • Other apps cannnot be able to use the Storage class.
• When require code, that code will stick around
  • It will be kept in the Ruby top-level environment

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情報元/引用元 # thanks

The Shoes Manual // The Rules of Shoes