Class: LUIT::List

Inherits:
LUITElement show all
Defined in:
lib/luit.rb

Instance Attribute Summary collapse

Attributes inherited from LUITElement

#h, #hover, #id, #w, #x, #y

Instance Method Summary collapse

Methods inherited from LUITElement

#button_down, #draw_rel, #updateHover, #update_rel

Constructor Details

#initialize(holder, id, x, y, h, s = 10) ⇒ List

Returns a new instance of List.



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# File 'lib/luit.rb', line 339

def initialize(holder, id, x, y, h, s = 10)
  super(holder, id, x, y, 50, h)
  @spaceing = s
  @contents = []
  @totalh = 0
  @focus = 0
  @scrollbar = VerticalSlider.new(self, "scroll", 0, 0, @h - 10)
end

Instance Attribute Details

#contents ⇒ Object (readonly)

Returns the value of attribute contents.



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# File 'lib/luit.rb', line 338

def contents
  @contents
end

Instance Method Details

#<<(item) ⇒ Object 



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# File 'lib/luit.rb', line 348

def <<(item)
  @contents << item
  @totalh += item.h + @spaceing
  @w = @contents.max_by{|x| x.w}.w
end

#draw(x = 0, y = 0) ⇒ Object 



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# File 'lib/luit.rb', line 354

def draw(x = 0, y = 0)
  x += @x
  y += @y
  prevh = 0
  @contents.each do |item|
    if !((prevh - @focus + item.h) <= 0 || (prevh - @focus) >= @h)
      item.draw(x + 30, y + prevh - @focus)
    end
    prevh += item.h + @spaceing
  end
  @scrollbar.draw(x, y)
end

#update(x = 0, y = 0) ⇒ Object 



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# File 'lib/luit.rb', line 367

def update(x = 0, y = 0)
  x += @x
  y += @y
  prevh = 0
  @contents.each do |item|
    if !((prevh - @focus + item.h) < 0 || (prevh - @focus) > @h)
      item.update(x + 30, y + prevh - @focus)
    end
    prevh += item.h + @spaceing
  end
  @scrollbar.update(x, y)
  if @totalh > @h
    v = @scrollbar.value / (@h - 10)
    @focus = (@totalh - @h) * v
  else
    @focus = 0
  end
end