#==============================================================================
# ** Sprite_MenuBack
#------------------------------------------------------------------------------
#  This sprite is used to display sprites behind menus
#==============================================================================


class Sprite_MenuBack < Sprite_Base

  attr_reader   :ID                    # reference ID
  #--------------------------------------------------------------------------
  # * Object Initialization
  #     picture : Game_Picture
  #--------------------------------------------------------------------------
  def initialize(x,y,name,alpha,myID="not given")
    @name = name
    @x=x
    @y=y
    @targx=x
    @targy=y
    @alpha=alpha
    @targa=alpha
    @duration=0
    @shake_duration=-1
    @shake_x_severity=0
    @shake_y_severity=0
    @shake_ox=x
    @shake_oy=y
    @ID = myID
    @origin =0
    @tone = Tone.new
    @hue = 0
    update
  end
  #--------------------------------------------------------------------------
  # * Free
  #--------------------------------------------------------------------------
  def dispose
    printf "disposed of?\n"
    bitmap.dispose if bitmap
  end
  #--------------------------------------------------------------------------
  # * Frame Update
  #--------------------------------------------------------------------------
  def update
    update_bitmap
    update_origin
    update_position
    update_shake
  end
  #--------------------------------------------------------------------------
  # * Update Transfer Origin Bitmap
  #--------------------------------------------------------------------------
  def update_bitmap
    if @name==""
      @bitmap = nil
    else
      @bitmap = Cache.battler(@name,@hue)
    end
    @rect=Rect.new(0,0,@bitmap.width,@bitmap.height)
  end

  #--------------------------------------------------------------------------
  # * Update Origin
  #--------------------------------------------------------------------------
  def update_origin
    #if @origin == 0
    #  self.ox = 0
    #  self.oy = 0
    #else
    #  self.ox = @cropped.width / 2
    #  self.oy = @cropped.height / 2
    #end
  end

  #--------------------------------------------------------------------------
  # * Update Position
  #--------------------------------------------------------------------------
  def update_position
    return if @duration == 0
    d = @duration
    @x = (@x * (d - 1) + @targx) / d.to_f
    @y = (@y * (d - 1) + @targy) / d.to_f
    @alpha = (@alpha * (d - 1) + @targa) / d.to_f
    @duration -= 1
  end

  def update_shake
    if @shake_duration == 0
      @x=@shake_ox
      @y=@shake_oy
      @shake_duration -= 1
      return
    end
    return if @shake_duration == -1
    d = @shake_duration
    @x = @shake_ox+(-@shake_x_severity + (1+rand(@shake_x_severity*2)))
    @y = @shake_oy+(-@shake_y_severity + (1+rand(@shake_y_severity*2)))
    @shake_duration -= 1
  end

  def set_shake(x,y,d)
    @shake_ox=@x
    @shake_oy=@y
    @shake_x_severity=x
    @shake_y_severity=y
    @shake_duration=d
  end

  def set_target(x,y,a,d)
    if d==0
      @x=x
      @y=y
      @alpha=a
    else
      @targx=x
      @targy=y
      @targa=a
    end
    @duration=d
    #printf "setting target of %s\n",@ID
  end

  def blt_to_target(target)
    target.blt(@x,@y,@bitmap,@rect,@alpha)
  end

end