TITLE:FocusTraversalKeysに矢印キーを追加してフォーカス移動
#navi(../)
#tags(KeyboardFocusManager, Focus, Container)
RIGHT:Posted by &author(aterai); at 2008-06-02
*FocusTraversalKeysに矢印キーを追加してフォーカス移動 [#tcf9885b]
デフォルトの``TAB``キーに加えて、矢印キーでもフォーカス移動できるように設定します。
-&jnlp;
-&jar;
-&zip;
//#screenshot
#ref(http://lh6.ggpht.com/_9Z4BYR88imo/TQTNHR5gShI/AAAAAAAAAaQ/KUE3fbR0bXo/s800/FocusTraversalKeys.png)
**サンプルコード [#c3444b6b]
#code(link){{
KeyboardFocusManager focusManager = KeyboardFocusManager.getCurrentKeyboardFocusManager();
Set<AWTKeyStroke> forwardKeys = new HashSet<AWTKeyStroke>(
focusManager.getDefaultFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS));
forwardKeys.add(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0));
forwardKeys.add(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0));
focusManager.setDefaultFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, forwardKeys);
Set<AWTKeyStroke> backwardKeys = new HashSet<AWTKeyStroke>(
focusManager.getDefaultFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS));
backwardKeys.add(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0));
backwardKeys.add(KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0));
focusManager.setDefaultFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, backwardKeys);
}}
**解説 [#f1452eb0]
上記のサンプルでは、デフォルトのトラバーサルキー(``TAB``,``SHIFT+TAB``)に加えて、上下左右の矢印キーでもフォーカス移動できるようになっています。
- ``KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS``
-- ``KeyEvent.VK_RIGHT``, ``KeyEvent.VK_DOWN``
- ``KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS``
-- ``KeyEvent.VK_LEFT``, ``KeyEvent.VK_UP``
----
各``JFrame``や``JDialog``に別々の``FocusTraversalKeys``を設定したい場合は、``Container#setFocusTraversalKeys``を使用します。
#code{{
Set<AWTKeyStroke> forwardKeys = new HashSet<AWTKeyStroke>(
frame.getFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS));
forwardKeys.add(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0));
forwardKeys.add(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0));
frame.setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, forwardKeys);
}}
**参考リンク [#qecb6a95]
- [http://docs.oracle.com/javase/jp/6/api/java/awt/KeyboardFocusManager.html KeyboardFocusManager#setDefaultFocusTraversalKeys]
- [http://docs.oracle.com/javase/jp/6/api/java/awt/Container.html Container#setFocusTraversalKeys]
- [http://docs.oracle.com/javase/tutorial/uiswing/misc/focus.html How to Use the Focus Subsystem]
- [[Focusの移動>Swing/FocusTraversal]]
**コメント [#yf942508]
#comment