def setup 
  c = createCanvas(100, 100)
  background(200)
  textAlign(CENTER)
  text('drop file', width / 2, height / 2)
  c.drop do |file|
    file = Native(`file`)
    background(200)
    text('dropped file:', width / 2, height / 2)
    text(file.name, width / 2, height / 2 + 40)   # ファイル名を表示
  end
end

def setup 
  c = createCanvas(100, 100)
  background(200)
  textAlign(CENTER)
  text('drop image', width / 2, height / 2)
  c.drop do |file|
    file = Native(`file`)
    @img = createImg(file.data, '').hide   # <img>要素を生成
  end
end

def draw 
  if (@img)
    image(@img, 0, 0, width, height)       # <img>要素を描画
  end
end