Java KeyEvent.META_MASK属性代码示例

public static String appendKeyMnemonic(StringBuilder sb, KeyStroke key) {
    String sk = org.openide.util.Utilities.keyToString(key);
    int mods = key.getModifiers();
    if ((mods & KeyEvent.CTRL_MASK) != 0) {
        sb.append("Ctrl+"); // NOI18N
    }
    if ((mods & KeyEvent.ALT_MASK) != 0) {
        sb.append("Alt+"); // NOI18N
    }
    if ((mods & KeyEvent.SHIFT_MASK) != 0) {
        sb.append("Shift+"); // NOI18N
    }
    if ((mods & KeyEvent.META_MASK) != 0) {
        sb.append("Meta+"); // NOI18N
    }

    int i = sk.indexOf('-'); //NOI18N
    if (i != -1) {
        sk = sk.substring(i + 1);
    }
    sb.append(sk);

    return sb.toString();
}
 

private static boolean usableKeyOnMac(int key, int mask) {
    //All permutations fail for Q except ctrl
    if (key == KeyEvent.VK_Q) {
        return false;
    }

    boolean isMeta = ((mask & KeyEvent.META_MASK) != 0) || ((mask & KeyEvent.CTRL_DOWN_MASK) != 0);

    boolean isAlt = ((mask & KeyEvent.ALT_MASK) != 0) || ((mask & KeyEvent.ALT_DOWN_MASK) != 0);

    boolean isOnlyMeta = isMeta && ((mask & ~(KeyEvent.META_DOWN_MASK | KeyEvent.META_MASK)) == 0);

    //Mac OS consumes keys Command+ these keys - the app will never see
    //them, so CTRL should not be remapped for these
    if (isOnlyMeta) {
        return (key != KeyEvent.VK_H) && (key != KeyEvent.VK_SPACE) && (key != KeyEvent.VK_TAB);
    }
    if ((key == KeyEvent.VK_D) && isMeta && isAlt) {
        return false;
    }
    if (key == KeyEvent.VK_SPACE && isMeta && ((mask & KeyEvent.CTRL_MASK) != 0)) {
        // http://lists.apple.com/archives/java-dev/2010/Aug/msg00002.html
        return false;
    }
    return true;
}
 

/**
 * A plain text representation of a KeyStroke.  Doesn't differ much
 * from {@link KeyEvent#getKeyText}
 */
public static String getString(KeyStroke k) {
  if (k == null) {
    return null;
  }
  String s = KeyEvent.getKeyText(k.getKeyCode());
  s = s.replace(' ', '_');
  if ((k.getModifiers() & KeyEvent.SHIFT_MASK) > 0) {
    s = Resources.getString("Keys.shift") + " " + s; //$NON-NLS-1$ //$NON-NLS-2$
  }
  if ((k.getModifiers() & KeyEvent.CTRL_MASK) > 0) {
    s = Resources.getString("Keys.ctrl") + " " + s; //$NON-NLS-1$ //$NON-NLS-2$
  }
  if ((k.getModifiers() & KeyEvent.META_MASK) > 0) {
    s = Resources.getString("Keys.meta") + " " + s; //$NON-NLS-1$ //$NON-NLS-2$
  }
  if ((k.getModifiers() & KeyEvent.ALT_MASK) > 0) {
    s = Resources.getString("Keys.alt") + " " + s; //$NON-NLS-1$ //$NON-NLS-2$
  }
  return s.toUpperCase();
}
 

public static String getString(KeyStroke k) {
  String s = KeyEvent.getKeyText(k.getKeyCode());
  if ((k.getModifiers() & KeyEvent.SHIFT_MASK) > 0) {
    s = KeyEvent.getKeyText(KeyEvent.VK_SHIFT) + "+" + s;
  }
  if ((k.getModifiers() & KeyEvent.CTRL_MASK) > 0) {
    s = KeyEvent.getKeyText(KeyEvent.VK_CONTROL) + "+" + s;
  }
  if ((k.getModifiers() & KeyEvent.META_MASK) > 0) {
    s = KeyEvent.getKeyText(KeyEvent.VK_META) + "+" + s;
  }
  if ((k.getModifiers() & KeyEvent.ALT_MASK) > 0) {
    s = KeyEvent.getKeyText(KeyEvent.VK_ALT) + "+" + s;
  }
  return s;
}
 

/** Adds characters for modifiers to the buffer.
* @param buf buffer to add to
* @param modif modifiers to add (KeyEvent.XXX_MASK)
* @return true if something has been added
*/
private static boolean addModifiers(StringBuilder buf, int modif) {
    boolean b = false;

    if ((modif & KeyEvent.CTRL_MASK) != 0) {
        buf.append("C"); // NOI18N
        b = true;
    }

    if ((modif & KeyEvent.ALT_MASK) != 0) {
        buf.append("A"); // NOI18N
        b = true;
    }

    if ((modif & KeyEvent.SHIFT_MASK) != 0) {
        buf.append("S"); // NOI18N
        b = true;
    }

    if ((modif & KeyEvent.META_MASK) != 0) {
        buf.append("M"); // NOI18N
        b = true;
    }

    if ((modif & CTRL_WILDCARD_MASK) != 0) {
        buf.append("D");
        b = true;
    }

    if ((modif & ALT_WILDCARD_MASK) != 0) {
        buf.append("O");
        b = true;
    }

    return b;
}
 

private static boolean addModifiersPortable(StringBuilder buf, int modifiers) {
    boolean b = false;

    if ((modifiers & KeyEvent.SHIFT_MASK) != 0) {
        buf.append('S');
        b = true;
    }

    if (Utilities.isMac() && ((modifiers & KeyEvent.META_MASK) != 0) || !Utilities.isMac() && ((modifiers & KeyEvent.CTRL_MASK) != 0)) {
        buf.append('D');
        b = true;
    }

    if (Utilities.isMac() && ((modifiers & KeyEvent.CTRL_MASK) != 0) || !Utilities.isMac() && ((modifiers & KeyEvent.ALT_MASK) != 0)) {
        buf.append('O');
        b = true;
    }
    // mac alt fallback
    if (Utilities.isMac() && ((modifiers & KeyEvent.ALT_MASK) != 0)) {
        buf.append('A');
        b = true;
    }
    // META fallback, see issue #224362
    if (!Utilities.isMac() && ((modifiers & KeyEvent.META_MASK) != 0)) {
        buf.append('M');
        b = true;
    }

    return b;
}
 

public void keyPressed(KeyEvent e) {
    assert (e.getSource() instanceof JTextField);

    if(((e.getModifiers() & (KeyEvent.ALT_MASK | KeyEvent.SHIFT_MASK | KeyEvent.CTRL_MASK | KeyEvent.META_MASK)) == 0) &&
            (e.getKeyCode() == KeyEvent.VK_DOWN || 
            e.getKeyCode() == KeyEvent.VK_UP ||
            e.getKeyCode() == KeyEvent.VK_ESCAPE)) {
        return ;
    }
    
    textField = (JTextField) e.getSource();
    KeyStroke keyStroke = createKeyStroke(e);

    boolean add = e.getKeyCode() != KeyEvent.VK_SHIFT &&
            e.getKeyCode() != KeyEvent.VK_CONTROL &&
            e.getKeyCode() != KeyEvent.VK_ALT &&
            e.getKeyCode() != KeyEvent.VK_META &&
            e.getKeyCode() != KeyEvent.VK_ALT_GRAPH;

    if (!(enterConfirms && keyStroke.equals(enterKS))) {
        if (keyStroke.equals(backspaceKS) && !key.equals("")) {
            // delete last key
            int i = key.lastIndexOf(' '); //NOI18N
            if (i < 0) {
                key = ""; //NOI18N
            } else {
                key = key.substring(0, i);
            }
            textField.setText(key);
        } else {
            // add key
            addKeyStroke(keyStroke, add);
        }

        e.consume();
    }
}
 

/** Reads for modifiers and creates integer with required mask.
* @param s string with modifiers
* @return integer with mask
* @exception NoSuchElementException if some letter is not modifier
*/
private static int readModifiers(String s) throws NoSuchElementException {
    int m = 0;

    for (int i = 0; i < s.length(); i++) {
        switch (s.charAt(i)) {
        case 'C':
            m |= KeyEvent.CTRL_MASK;

            break;

        case 'A':
            m |= KeyEvent.ALT_MASK;

            break;

        case 'M':
            m |= KeyEvent.META_MASK;

            break;

        case 'S':
            m |= KeyEvent.SHIFT_MASK;

            break;

        case 'D':
            m |= CTRL_WILDCARD_MASK;

            break;

        case 'O':
            m |= ALT_WILDCARD_MASK;

            break;

        default:
            throw new NoSuchElementException(s);
        }
    }

    return m;
}