keyevent.java

来自「《移动Agent技术》一书的所有章节源代码。」· Java 代码 · 共 480 行 · 第 1/2 页

        if (id == KEY_TYPED && keyCode != VK_UNDEFINED) {
            throw new IllegalArgumentException("invalid keyCode");
        }

        this.keyCode = keyCode;
        this.keyChar = keyChar;
    }

    /*
     * @deprecated, as of JDK1.1 - Do NOT USE; will be removed in 1.1.1.
     */
    public KeyEvent(Component source, int id, long when, int modifiers,
                    int keyCode) {
        this(source, id, when, modifiers, keyCode, (char)keyCode);
    }

    /**
     * Returns the integer key-code associated with the key in this event.
     * For KEY_TYPED events, keyCode is VK_UNDEFINED.
     */
    public int getKeyCode() {
        return keyCode;
    }

    public void setKeyCode(int keyCode) {
        this.keyCode = keyCode;
    }

    public void setKeyChar(char keyChar) {
        this.keyChar = keyChar;
    }

    /**
     * Change the modifiers for a KeyEvent.  
     * <p>
     * NOTE:  use of this method is not recommended, because many AWT
     * implementations do not recognize modifier changes.  This is
     * especially true for KEY_TYPED events where the shift modifier
     * is changed.
     * @deprecated, as of JDK1.1.4
     */
    public void setModifiers(int modifiers) {
        this.modifiers = modifiers;
    }

    /**
     * Returns the character associated with the key in this event.
     * If no valid Unicode character exists for this key event, keyChar
     * is CHAR_UNDEFINED.
     */
    public char getKeyChar() {
        return keyChar;
    }

    /**
     * Returns a String describing the keyCode, such as "HOME", "F1" or "A".
     * These strings can be localized by changing the awt.properties file.
     */
    public static String getKeyText(int keyCode) {
        if (keyCode >= VK_0 && keyCode <= VK_9 || 
            keyCode >= VK_A && keyCode <= VK_Z) {
            return String.valueOf((char)keyCode);
        }

        // Check for other ASCII keyCodes.
        int index = ",./;=[\\]".indexOf(keyCode);
        if (index >= 0) {
            return String.valueOf((char)keyCode);
        }
	
        switch(keyCode) {
          case VK_ENTER: return Toolkit.getProperty("AWT.enter", "Enter");
          case VK_BACK_SPACE: return Toolkit.getProperty("AWT.backSpace", "Backspace");
          case VK_TAB: return Toolkit.getProperty("AWT.tab", "Tab");
          case VK_CANCEL: return Toolkit.getProperty("AWT.cancel", "Cancel");
          case VK_CLEAR: return Toolkit.getProperty("AWT.clear", "Clear");
          case VK_SHIFT: return Toolkit.getProperty("AWT.shift", "Shift");
          case VK_CONTROL: return Toolkit.getProperty("AWT.control", "Control");
          case VK_ALT: return Toolkit.getProperty("AWT.alt", "Alt");
          case VK_PAUSE: return Toolkit.getProperty("AWT.pause", "Pause");
          case VK_CAPS_LOCK: return Toolkit.getProperty("AWT.capsLock", "Caps Lock");
          case VK_ESCAPE: return Toolkit.getProperty("AWT.escape", "Escape");
          case VK_SPACE: return Toolkit.getProperty("AWT.space", "Space");
          case VK_PAGE_UP: return Toolkit.getProperty("AWT.pgup", "Page Up");
          case VK_PAGE_DOWN: return Toolkit.getProperty("AWT.pgdn", "Page Down");
          case VK_END: return Toolkit.getProperty("AWT.end", "End");
          case VK_HOME: return Toolkit.getProperty("AWT.home", "Home");
          case VK_LEFT: return Toolkit.getProperty("AWT.left", "Left");
          case VK_UP: return Toolkit.getProperty("AWT.up", "Up");
          case VK_RIGHT: return Toolkit.getProperty("AWT.right", "Right");
          case VK_DOWN: return Toolkit.getProperty("AWT.down", "Down");

          case VK_MULTIPLY: return Toolkit.getProperty("AWT.multiply", "NumPad *");
          case VK_ADD: return Toolkit.getProperty("AWT.add", "NumPad +");
          case VK_SEPARATER: return Toolkit.getProperty("AWT.separater", "NumPad ,");
          case VK_SUBTRACT: return Toolkit.getProperty("AWT.subtract", "NumPad -");
          case VK_DECIMAL: return Toolkit.getProperty("AWT.decimal", "NumPad .");
          case VK_DIVIDE: return Toolkit.getProperty("AWT.divide", "NumPad /");

          case VK_F1: return Toolkit.getProperty("AWT.f1", "F1");
          case VK_F2: return Toolkit.getProperty("AWT.f2", "F2");
          case VK_F3: return Toolkit.getProperty("AWT.f3", "F3");
          case VK_F4: return Toolkit.getProperty("AWT.f4", "F4");
          case VK_F5: return Toolkit.getProperty("AWT.f5", "F5");
          case VK_F6: return Toolkit.getProperty("AWT.f6", "F6");
          case VK_F7: return Toolkit.getProperty("AWT.f7", "F7");
          case VK_F8: return Toolkit.getProperty("AWT.f8", "F8");
          case VK_F9: return Toolkit.getProperty("AWT.f9", "F9");
          case VK_F10: return Toolkit.getProperty("AWT.f10", "F10");
          case VK_F11: return Toolkit.getProperty("AWT.f11", "F11");
          case VK_F12: return Toolkit.getProperty("AWT.f12", "F12");
          case VK_DELETE: return Toolkit.getProperty("AWT.delete", "Delete");
          case VK_NUM_LOCK: return Toolkit.getProperty("AWT.numLock", "Num Lock");
          case VK_SCROLL_LOCK: return Toolkit.getProperty("AWT.scrollLock", "Scroll Lock");
          case VK_PRINTSCREEN: return Toolkit.getProperty("AWT.printScreen", "Print Screen");
          case VK_INSERT: return Toolkit.getProperty("AWT.insert", "Insert");
          case VK_HELP: return Toolkit.getProperty("AWT.help", "Help");
          case VK_META: return Toolkit.getProperty("AWT.meta", "Meta");
          case VK_BACK_QUOTE: return Toolkit.getProperty("AWT.backQuote", "Back Quote");
          case VK_QUOTE: return Toolkit.getProperty("AWT.quote", "Quote");
			 
          case VK_FINAL: return Toolkit.getProperty("AWT.final", "Final");
          case VK_CONVERT: return Toolkit.getProperty("AWT.convert", "Convert");
          case VK_NONCONVERT: return Toolkit.getProperty("AWT.noconvert", "No Convert");
          case VK_ACCEPT: return Toolkit.getProperty("AWT.accept", "Accept");
          case VK_MODECHANGE: return Toolkit.getProperty("AWT.modechange", "Mode Change");
          case VK_KANA: return Toolkit.getProperty("AWT.kana", "Kana");
	  case VK_KANJI: return Toolkit.getProperty("AWT.kanji", "Kanji");
        }

        if (keyCode >= VK_NUMPAD0 && keyCode <= VK_NUMPAD9) {
            String numpad = Toolkit.getProperty("AWT.numpad", "NumPad");
	    char c = (char)(keyCode - VK_NUMPAD0 + '0');
            return numpad + "-" + c;
        }

        String unknown = Toolkit.getProperty("AWT.unknown", "Unknown keyCode");
        return unknown + ": 0x" + Integer.toString(keyCode, 16);
    }

    /**
     * Returns a String describing the modifier key(s), such as "Shift",
     * or "Ctrl+Shift".  These strings can be localized by changing the 
     * awt.properties file.
     */
    public static String getKeyModifiersText(int modifiers) {
        StringBuffer buf = new StringBuffer();
        if ((modifiers & InputEvent.META_MASK) != 0) {
            buf.append(Toolkit.getProperty("AWT.meta", "Meta"));
            buf.append("+");
        }
        if ((modifiers & InputEvent.CTRL_MASK) != 0) {
            buf.append(Toolkit.getProperty("AWT.control", "Ctrl"));
            buf.append("+");
        }
        if ((modifiers & InputEvent.ALT_MASK) != 0) {
            buf.append(Toolkit.getProperty("AWT.alt", "Alt"));
            buf.append("+");
        }
        if ((modifiers & InputEvent.SHIFT_MASK) != 0) {
            buf.append(Toolkit.getProperty("AWT.shift", "Shift"));
            buf.append("+");
        }
        if (buf.length() > 0) {
            buf.setLength(buf.length()-1); // remove trailing '+'
        }
        return buf.toString();
    }

    /** Returns whether or not the key in this event is an "action" key,
     *  as defined in Event.java.
     */
    public boolean isActionKey() {
        switch (keyCode) {
          case VK_HOME:
          case VK_END:
          case VK_PAGE_UP:
          case VK_PAGE_DOWN:
          case VK_UP:
          case VK_DOWN:
          case VK_LEFT:
          case VK_RIGHT:
          case VK_F1:
          case VK_F2:
          case VK_F3:
          case VK_F4:
          case VK_F5:
          case VK_F6:
          case VK_F7:
          case VK_F8:
          case VK_F9:
          case VK_F10:
          case VK_F11:
          case VK_F12:
          case VK_PRINTSCREEN:
          case VK_SCROLL_LOCK:
          case VK_CAPS_LOCK:
          case VK_NUM_LOCK:
          case VK_PAUSE:
          case VK_INSERT:
              return true;
        }
        return false;
    }

    public String paramString() {
        String typeStr;
        switch(id) {
          case KEY_PRESSED:
              typeStr = "KEY_PRESSED";
              break;
          case KEY_RELEASED:
              typeStr = "KEY_RELEASED";
              break;
          case KEY_TYPED:
              typeStr = "KEY_TYPED";
              break;
          default:
              typeStr = "unknown type";
        }

        String str = typeStr + ",keyCode=" + keyCode;
        if (isActionKey() || keyCode == VK_ENTER || keyCode == VK_BACK_SPACE || 
	    keyCode == VK_TAB || keyCode == VK_ESCAPE || keyCode == VK_DELETE ||
	    (keyCode >= VK_NUMPAD0 && keyCode <= VK_NUMPAD9)) {
            str += "," + getKeyText(keyCode);
	} else if (keyChar == '\n' || keyChar == '\b' ||
	    keyChar == '\t' || keyChar == VK_ESCAPE || keyChar == VK_DELETE) {
            str += "," + getKeyText(keyChar);
        } else {
            str += ",keyChar='" + keyChar + "'";
        }
        if (modifiers > 0) {
            str += ",modifiers=" + getKeyModifiersText(modifiers);
        }
        return str;
    }

}