August 2017
Intermediate to advanced
500 pages
12h 3m
Japanese
Content preview from PythonとJavaScriptではじめるデータビジュアライゼーション
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424
20 章 メニューバー
択に対応する
DOM
要素とコールバックを作成する理想的な方法です。
19
章では、選択したデータセットからの
table
行の作成や受賞者のデータを使った人物情報ボッ
クス詳細の埋め込みが容易であることを示しました。本章では、変化するデータセットに基づいて
セレクタに選択肢を設定する方法とセレクタやラジオボックスなどのユーザインタフェース要素に
コールバック関数を割り当てる方法を説明します。
不変の HTML 要素がある場合には（例えば、選択肢がデータの変化に左右されない選択ボックス）、
HTML で記述し、D3 を使ってユーザ入力を処理する必要なコールバック関数を追加するのが最善で
す。CSS スタイル設定の場合と同様に、できるだけ普通の HTML で行うべきです。これはコード
ベースをよりクリーンに保ち、他の開発者や開発者以外の人が理解しやすくなります。本章ではこの
ルールを少し拡張して HTML 要素作成の例を示しますが、ほとんどの場合にベストな選択です。
20.2
メニューバーの作成
「
15.2
HTML
スケルトン」で述べたように、
Nobel-viz
は
HTML
の
<div>
プレースホルダ
をベースに作成し、
JavaScript
と
D3
で肉付けします。例
20-1
に示すように、メニューバーは
nobel-menu <div>
をベースに作成し、メインのグラフホルダの上に配置し、
3
つのセレクタフィ
ルタ（受賞分野、性別、国）と国の受賞者数のスケール（絶対数か
1
人当たり）を選ぶ
2
つのラ
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.