Swing/MenuItemAcceleratorFont の変更点

---
category: swing
folder: MenuItemAcceleratorFont
title: JMenuItemのAccelerator表示を変更する
tags: [JMenuItem, UIManager, Font, JCheckBoxMenuItem, JRadioButtonMenuItem]
author: aterai
pubdate: 2023-11-13T06:14:06+09:00
description: JMenuItemに設定されたAcceleratorの文字サイズや色を変更します。
image: https://drive.google.com/uc?id=1yw38bWwIYd05dmP11IRoVcc-YF740hoh
---
* Summary [#summary]
`JMenuItem`に設定された`Accelerator`の文字サイズや色を変更します。

#download(https://drive.google.com/uc?id=1yw38bWwIYd05dmP11IRoVcc-YF740hoh)

* Source Code Examples [#sourcecode]
#code(link){{
Color color1;
Color color2;
Font font;
List<String> list = Arrays.asList(
    "MenuItem", "CheckBoxMenuItem", "RadioButtonMenuItem");
for (String prefix : list) {
  String key1 = prefix + ".acceleratorForeground";
  String key2 = prefix + ".acceleratorSelectionForeground";
  String key3 = prefix + ".acceleratorFont";
  if (selected) {
    color1 = AFC;
    color2 = Color.WHITE;
    font = UIManager.getFont(key3);
    if (font != null) {
      font = font.deriveFont(10f);
    }
  } else {
    UIDefaults def = UIManager.getLookAndFeelDefaults();
    color1 = def.getColor(key1);
    color2 = def.getColor(key2);
    font = def.getFont(key3);
  }
  UIManager.put(key1, color1);
  UIManager.put(key2, color2);
  UIManager.put(key3, font);
}
SwingUtilities.updateComponentTreeUI(popup);
}}

* Description [#description]
- `UIManager.put("MenuItem.acceleratorForeground", color)`
-- `JMenuItem#setAccelerator(KeyStroke)`で設定した`accelerator`の文字色を変更
-- `MetalLookAndFeel`、`WindowsLookAndFeel`などで有効、`NimbusLookAndFeel`、`GTKLookAndFeel`などでは無効
--- [https://bugs.openjdk.org/browse/JDK-8365625 &#91;JDK-8365625&#93; Can't change accelerator colors in Windows L&F - Java Bug System]
-- `JCheckBoxMenuItem`、`JRadioButtonMenuItem`には影響しないため、別途`CheckBoxMenuItem.acceleratorForeground`などで設定する必要がある
-- `BasicLookAndFeel`で`Menu.acceleratorForeground`、`Menu.acceleratorSelectionForeground`、`Menu.acceleratorSelectionFont`が設定されているが、`JMenu`に`accelerator`を設定しても実行時に`java.lang.Error: setAccelerator() is not defined for JMenu.  Use setMnemonic() instead.`とエラーになるので無意味
--- [https://docs.oracle.com/javase/jp/8/docs/api/javax/swing/JMenu.html#setAccelerator-javax.swing.KeyStroke- JMenu#setAccelerator(KeyStroke) (Java Platform SE 8)]
- `UIManager.put("MenuItem.acceleratorSelectionForeground", color)`
-- `accelerator`の選択文字色を変更
-- [https://bugs.openjdk.org/browse/JDK-8365625 &#91;JDK-8365625&#93; Can't change accelerator colors in Windows L&F - Java Bug System]
-- [https://bugs.openjdk.org/browse/JDK-8365375 &#91;JDK-8365375&#93; Method SU3.setAcceleratorSelectionForeground assigns to acceleratorForeground - Java Bug System]
- `UIManager.put("MenuItem.acceleratorSelectionFont", font)`
-- `accelerator`の`Font`を変更
-- このサンプルでは`Font`サイズを`Font#deriveFont(10f)`で縮小している

* Reference [#reference]
- [[JMenuItemのAccelerator表示を右揃えにする>Swing/MenuItemAcceleratorAlignment]]

* Comment [#comment]
#comment
#comment