- 追加された行はこの色です。
- 削除された行はこの色です。
---
category: swing
folder: CellEditorPopupMenu
title: JTableのセルエディタにJPopupMenuを設定
tags: [JTable, TableCellEditor, UndoManager, JPopupMenu, AncestorListener]
author: aterai
pubdate: 2010-04-26T16:54:26+09:00
description: JTableのセルエディタに、Copy、Paste、Undo、Redoなどを行うJPopupMenuを設定します。
image: https://lh4.googleusercontent.com/_9Z4BYR88imo/TQTIn7Rc6TI/AAAAAAAAATE/drRaDYiUB1w/s800/CellEditorPopupMenu.png
hreflang:
href: https://java-swing-tips.blogspot.com/2010/11/jtable-celleditor-popupmenu.html
lang: en
---
* 概要 [#summary]
`JTable`のセルエディタに、`Copy`、`Paste`、`Undo`、`Redo`などを行う`JPopupMenu`を設定します。
#download(https://lh4.googleusercontent.com/_9Z4BYR88imo/TQTIn7Rc6TI/AAAAAAAAATE/drRaDYiUB1w/s800/CellEditorPopupMenu.png)
* サンプルコード [#sourcecode]
#code(link){{
public static JPopupMenu installTextComponentPopupMenu(final JTextComponent tc) {
final UndoManager manager = new UndoManager();
final Action undoAction = new UndoAction(manager);
final Action redoAction = new RedoAction(manager);
final Action cutAction = new DefaultEditorKit.CutAction();
final Action copyAction = new DefaultEditorKit.CopyAction();
final Action pasteAction = new DefaultEditorKit.PasteAction();
final Action deleteAction = new AbstractAction("delete") {
UndoManager manager = new UndoManager();
Action undoAction = new UndoAction(manager);
Action redoAction = new RedoAction(manager);
Action cutAction = new DefaultEditorKit.CutAction();
Action copyAction = new DefaultEditorKit.CopyAction();
Action pasteAction = new DefaultEditorKit.PasteAction();
Action deleteAction = new AbstractAction("delete") {
@Override public void actionPerformed(ActionEvent e) {
((JTextComponent) getInvoker()).replaceSelection(null);
}
};
tc.addAncestorListener(new AncestorListener() {
@Override public void ancestorAdded(AncestorEvent e) {
manager.discardAllEdits();
tc.requestFocusInWindow();
}
@Override public void ancestorMoved(AncestorEvent e) {}
@Override public void ancestorRemoved(AncestorEvent e) {}
});
tc.getDocument().addUndoableEditListener(manager);
tc.getActionMap().put("undo", undoAction);
tc.getActionMap().put("redo", redoAction);
InputMap imap = tc.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
imap.put(KeyStroke.getKeyStroke(
KeyEvent.VK_Z, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()), "undo");
imap.put(KeyStroke.getKeyStroke(
KeyEvent.VK_Y, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()), "redo");
JPopupMenu popup = new JPopupMenu();
popup.add(cutAction);
popup.add(copyAction);
popup.add(pasteAction);
popup.add(deleteAction);
popup.addSeparator();
popup.add(undoAction);
popup.add(redoAction);
popup.addPopupMenuListener(new PopupMenuListener() {
@Override public void popupMenuCanceled(PopupMenuEvent e) {}
@Override public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
undoAction.setEnabled(true);
redoAction.setEnabled(true);
}
@Override public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
JPopupMenu pop = (JPopupMenu) e.getSource();
JTextField field = (JTextField) pop.getInvoker();
boolean flg = field.getSelectedText() != null;
cutAction.setEnabled(flg);
copyAction.setEnabled(flg);
deleteAction.setEnabled(flg);
undoAction.setEnabled(manager.canUndo());
redoAction.setEnabled(manager.canRedo());
}
});
tc.setComponentPopupMenu(popup);
return popup;
}
}}
* 解説 [#explanation]
上記のサンプルでは、`JTable`のセルエディタ内の文字列に対して、`Cut`、`Copy`、`Paste`、`Delete`、`Undo`、`Redo`を行うための`JPopupMenu`を設定しています。
----
- セルエディタとして使用する`JTextField`は、同一インスタンス使い回しているため、別セルでの編集が持ち越されないよう`AncestorListener`を使って表示されるたびに`UndoManager#discardAllEdits()`を呼び出してリセット
-- もしくは、`DefaultCellEditor#isCellEditable(...)`などをオーバーライドしてリセット
-- もしくは`DefaultCellEditor#isCellEditable(...)`などをオーバーライドしてリセット
#code{{
DefaultCellEditor ce = new DefaultCellEditor(new JTextField()) {
@Override public boolean isCellEditable(EventObject e) {
boolean b = super.isCellEditable(e);
if (b) {
manager.discardAllEdits();
}
return b;
}
};
table.setDefaultEditor(Object.class, ce);
}}
* 参考リンク [#reference]
- [https://www.ne.jp/asahi/hishidama/home/tech/java/swing/JTable.html Java Swing「JTable」メモ(Hishidama's Swing-JTable Memo)]
-- セルエディタ内だけではなく、行の追加、削除などを`Undo`、`Redo`するサンプルが参考になる
* コメント [#comment]
#comment
#comment