Class: PPCurses::MenuBar

Inherits:
Responder show all
Defined in:
lib/ppcurses/menu_bar.rb

Overview

The menubar is activated and deactivated by the ESCAPE key.

Any responders further down the responder chain will never receive ESCAPE key events.

Instance Attribute Summary collapse

Attributes inherited from Responder

#next_responder

Instance Method Summary collapse

Methods inherited from Responder

#accepts_first_responder, #become_first_responder, isa, #resign_first_responder

Constructor Details

#initialize ⇒ MenuBar

Returns a new instance of MenuBar.



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# File 'lib/ppcurses/menu_bar.rb', line 13

def initialize
  @menu_items = []
  @selected = false
end

Instance Attribute Details

#selected ⇒ Object

Returns the value of attribute selected.



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# File 'lib/ppcurses/menu_bar.rb', line 11

def selected
  @selected
end

Instance Method Details

#add_menu_item(menu_item) ⇒ Object 



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# File 'lib/ppcurses/menu_bar.rb', line 47

def add_menu_item(menu_item)
  @menu_items.push(menu_item)
end

#key_down(key) ⇒ Object 



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# File 'lib/ppcurses/menu_bar.rb', line 55

def key_down( key )

  if key == ESCAPE
    @selected = !@selected
    return
  end

  if @selected
    @menu_items.each do |menu_item|
      if key == menu_item.key
        menu_item.action.call
        return
      end
    end
    return
  end

  @next_responder.key_down(key) unless @next_responder.nil?

end

#remove_menu_item(menu_item) ⇒ Object 



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# File 'lib/ppcurses/menu_bar.rb', line 51

def remove_menu_item(menu_item)
  @menu_items.delete(menu_item)
end

#show(screen) ⇒ Object

Expects screen to be a PPCurses::Screen object Need to convert to work with a window or a view.



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# File 'lib/ppcurses/menu_bar.rb', line 20

def show(screen)

  screen.set_pos_by_point(ZERO_POINT)

  if @selected
   screen.attron(A_REVERSE)
  else
   screen.attron(A_UNDERLINE)
  end

  @menu_items.each do |menu_item|
    screen.addstr( "#{menu_item} ")
  end

  p = screen.cur_point

  screen.addstr( ' ' * (screen.width - p.x) )

  if @selected
    screen.attroff(A_REVERSE)
  else
    screen.attroff(A_UNDERLINE)
  end

end