Class: ScreenManager

Inherits:
Object
  • Object
show all
Defined in:
lib/delve/screen_manager.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ScreenManager

Returns a new instance of ScreenManager.



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# File 'lib/delve/screen_manager.rb', line 2

def initialize
  @screen_stack = Array.new
end

Instance Method Details

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/delve/screen_manager.rb', line 6

def empty?
  @screen_stack.empty?
end

#pop_screen ⇒ Object 



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# File 'lib/delve/screen_manager.rb', line 14

def pop_screen
  @screen_stack.pop
end

#push_screen(screen) ⇒ Object 



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# File 'lib/delve/screen_manager.rb', line 10

def push_screen(screen)
  @screen_stack.push screen
end

#render(display) ⇒ Object 



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# File 'lib/delve/screen_manager.rb', line 24

def render(display)
  raise 'Cannot render when no screens are present' if empty?
  raise 'Cannot render when display is nil' unless display

  bottom = @screen_stack.length - 1
  screens = @screen_stack.length - 1
  
  (0..screens).reverse_each do |i|
    if !@screen_stack[i].partial?
      break
    end
    bottom = i-1
  end
  (bottom..screens).each do |i|
    @screen_stack[i].render display
  end
end

#update(input) ⇒ Object 



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# File 'lib/delve/screen_manager.rb', line 18

def update(input)
  raise 'Cannot handle key when no screens are present' if empty?
  raise 'Cannot handle key when input is nil' unless input
  @screen_stack.last.update input
end