Swing/TabbedPaneWithCheckBox の変更点

---
category: swing
folder: TabbedPaneWithCheckBox
title: JTabbedPaneの余白にJCheckBoxを配置
tags: [JTabbedPane, JCheckBox, Border]
author: aterai
pubdate: 2006-04-03T01:35:12+09:00
description: JTabbedPaneの余白にJCheckBoxを配置して特定のタブの開閉を行います。
image: https://lh3.googleusercontent.com/_9Z4BYR88imo/TQTUQ8ALIWI/AAAAAAAAAlw/7jfCbNrxWK8/s800/TabbedPaneWithCheckBox.png
---
* Summary [#summary]
`JTabbedPane`の余白に`JCheckBox`を配置して特定のタブの表示・非表示を切り替えます。

#download(https://lh3.googleusercontent.com/_9Z4BYR88imo/TQTUQ8ALIWI/AAAAAAAAAlw/7jfCbNrxWK8/s800/TabbedPaneWithCheckBox.png)

* Source Code Examples [#sourcecode]
#code(link){{
class TabbedPaneWithCompBorder
      implements Border, MouseListener, SwingConstants {
  private final JCheckBox checkBox;
  private final JTabbedPane tab;
  private final Container rubberStamp = new JPanel();
  private final Rectangle rect = new Rectangle();

  protected TabbedPaneWithCompBorder(JCheckBox checkBox, JTabbedPane tab) {
    this.checkBox = checkBox;
    this.tab = tab;
  }

  @Override public void paintBorder(
      Component c, Graphics g, int x, int y, int width, int height) {
    Dimension size = checkBox.getPreferredSize();
    int xx = tab.getSize().width - size.width;
    Rectangle lastTab = tab.getBoundsAt(tab.getTabCount() - 1);
    int tabEnd = lastTab.x + lastTab.width;
    if (xx < tabEnd) {
      xx = tabEnd;
    }
    rect.setBounds(xx, -2, size.width, size.height);
    SwingUtilities.paintComponent(g, checkBox, rubberStamp, rect);
  }

  @Override public Insets getBorderInsets(Component c) {
    return new Insets(0, 0, 0, 0);
  }

  @Override public boolean isBorderOpaque() {
    return true;
  }

  private void dispatchEvent(MouseEvent e) {
    if (!rect.contains(e.getX(), e.getY())) {
      return;
    }
    checkBox.setBounds(rect);
    checkBox.dispatchEvent(SwingUtilities.convertMouseEvent(tab, e, checkBox));
  }

  @Override public void mouseClicked(MouseEvent e) {
    dispatchEvent(e);
  }

  @Override public void mouseEntered(MouseEvent e) {
    dispatchEvent(e);
  }

  @Override public void mouseExited(MouseEvent e) {
    dispatchEvent(e);
  }

  @Override public void mousePressed(MouseEvent e) {
    dispatchEvent(e);
  }

  @Override public void mouseReleased(MouseEvent e) {
    dispatchEvent(e);
  }
}
}}

* Description [#explanation]
* Description [#description]
- `JTabbedPane`の`Border`に`SwingUtilities.paintComponent(...)`メソッドを使って`JCheckBox`を描画
- `JCheckBox`が`JTabbedPane`の子になってタブが増えないように、別途レンダリング用`JPanel`を作成して中間コンテナに指定
- `JTabbedPane`で受け取ったマウスイベントを`SwingUtilities.convertMouseEvent(...)`メソッドを利用し、`JCheckBox`用に座標などを変換してイベント転送
- タブと`JCheckBox`が重ならないように親`JFrame`の最小サイズを設定
#code{{
frame.setMinimumSize(new Dimension(240, 80));
}}

----
- レイアウトマネージャーを利用して同様のことを行う方法もある
-- [https://community.oracle.com/thread/1389350 Swing - Any layout suggestions for this?]
--- レイアウトマネージャーを自作するweebibさんの投稿 (reply 1)
--- `OverlayLayout`を利用するcamickrさんの投稿 (reply 2)

* Reference [#reference]
- [[JTabbedPaneの余白に文字列を表示>Swing/TabbedPaneWithText]]
- [[JTabbedPaneの余白にJButtonを配置>Swing/TabbedPaneWithButton]]

* Comment [#comment]
#comment
#comment