/**
   * Sets the receiver's text. The string may include the mnemonic character.
   *
   * <p>Mnemonics are indicated by an '&amp;' that causes the next character to be the mnemonic.
   * When the user presses a key sequence that matches the mnemonic, a selection event occurs. On
   * most platforms, the mnemonic appears underlined but may be emphasised in a platform specific
   * manner. The mnemonic indicator character '&amp;' can be escaped by doubling it in the string,
   * causing a single '&amp;' to be displayed.
   *
   * @param string the new text
   * @exception IllegalArgumentException
   *     <ul>
   *       <li>ERROR_NULL_ARGUMENT - if the text is null
   *     </ul>
   *
   * @exception SWTException
   *     <ul>
   *       <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
   *       <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
   *     </ul>
   */
  public void setText(String string) {
    checkWidget();
    if (string == null) error(SWT.ERROR_NULL_ARGUMENT);
    if ((style & SWT.SEPARATOR) != 0) return;
    if (string.equals(text)) return;
    super.setText(string);
    long /*int*/ hwnd = parent.handle;
    TBBUTTONINFO info = new TBBUTTONINFO();
    info.cbSize = TBBUTTONINFO.sizeof;
    info.dwMask = OS.TBIF_TEXT | OS.TBIF_STYLE;
    info.fsStyle = (byte) (widgetStyle() | OS.BTNS_AUTOSIZE);
    long /*int*/ hHeap = OS.GetProcessHeap(), pszText = 0;
    if (string.length() != 0) {
      info.fsStyle |= OS.BTNS_SHOWTEXT;
      TCHAR buffer = new TCHAR(parent.getCodePage(), string, true);
      int byteCount = buffer.length() * TCHAR.sizeof;
      pszText = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount);
      OS.MoveMemory(pszText, buffer, byteCount);
      info.pszText = pszText;
    }
    OS.SendMessage(hwnd, OS.TB_SETBUTTONINFO, id, info);
    if (pszText != 0) OS.HeapFree(hHeap, 0, pszText);

    /*
     * Bug in Windows.  For some reason, when the font is set
     * before any tool item has text, the tool items resize to
     * a very small size.  Also, a tool item will only show text
     * when text has already been set on one item and then a new
     * item is created.  The fix is to use WM_SETFONT to force
     * the tool bar to redraw and layout.
     */
    parent.setDropDownItems(false);
    long /*int*/ hFont = OS.SendMessage(hwnd, OS.WM_GETFONT, 0, 0);
    OS.SendMessage(hwnd, OS.WM_SETFONT, hFont, 0);
    parent.setDropDownItems(true);
    parent.layoutItems();
  }
  /**
   * Sets the receiver's text. The string may include the mnemonic character and accelerator text.
   *
   * <p>Mnemonics are indicated by an '&amp;' that causes the next character to be the mnemonic.
   * When the user presses a key sequence that matches the mnemonic, a selection event occurs. On
   * most platforms, the mnemonic appears underlined but may be emphasised in a platform specific
   * manner. The mnemonic indicator character '&amp;' can be escaped by doubling it in the string,
   * causing a single '&amp;' to be displayed.
   *
   * <p>Accelerator text is indicated by the '\t' character. On platforms that support accelerator
   * text, the text that follows the '\t' character is displayed to the user, typically indicating
   * the key stroke that will cause the item to become selected. On most platforms, the accelerator
   * text appears right aligned in the menu. Setting the accelerator text does not install the
   * accelerator key sequence. The accelerator key sequence is installed using #setAccelerator.
   *
   * @param string the new text
   * @exception IllegalArgumentException
   *     <ul>
   *       <li>ERROR_NULL_ARGUMENT - if the text is null
   *     </ul>
   *
   * @exception SWTException
   *     <ul>
   *       <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
   *       <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
   *     </ul>
   *
   * @see #setAccelerator
   */
  public void setText(String string) {
    checkWidget();
    if (string == null) error(SWT.ERROR_NULL_ARGUMENT);
    if ((style & SWT.SEPARATOR) != 0) return;
    if (text.equals(string)) return;
    super.setText(string);
    long /*int*/ hHeap = OS.GetProcessHeap();
    long /*int*/ pszText = 0;
    boolean success = false;
    if ((OS.IsPPC || OS.IsSP) && parent.hwndCB != 0) {
      /*
       * Bug in WinCE PPC.  Tool items on the menubar don't resize
       * correctly when the character '&' is used (even when it
       * is a sequence '&&').  The fix is to remove all '&' from
       * the string.
       */
      if (string.indexOf('&') != -1) {
        int length = string.length();
        char[] text = new char[length];
        string.getChars(0, length, text, 0);
        int i = 0, j = 0;
        for (i = 0; i < length; i++) {
          if (text[i] != '&') text[j++] = text[i];
        }
        if (j < i) string = new String(text, 0, j);
      }
      /* Use the character encoding for the default locale */
      TCHAR buffer = new TCHAR(0, string, true);
      int byteCount = buffer.length() * TCHAR.sizeof;
      pszText = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount);
      OS.MoveMemory(pszText, buffer, byteCount);
      long /*int*/ hwndCB = parent.hwndCB;
      TBBUTTONINFO info2 = new TBBUTTONINFO();
      info2.cbSize = TBBUTTONINFO.sizeof;
      info2.dwMask = OS.TBIF_TEXT;
      info2.pszText = pszText;
      success = OS.SendMessage(hwndCB, OS.TB_SETBUTTONINFO, id, info2) != 0;
    } else {
      MENUITEMINFO info = new MENUITEMINFO();
      info.cbSize = MENUITEMINFO.sizeof;
      long /*int*/ hMenu = parent.handle;

      /* Use the character encoding for the default locale */
      TCHAR buffer = new TCHAR(0, string, true);
      int byteCount = buffer.length() * TCHAR.sizeof;
      pszText = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount);
      OS.MoveMemory(pszText, buffer, byteCount);
      /*
       * Bug in Windows 2000.  For some reason, when MIIM_TYPE is set
       * on a menu item that also has MIIM_BITMAP, the MIIM_TYPE clears
       * the MIIM_BITMAP style.  The fix is to use MIIM_STRING.
       */
      if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(4, 10)) {
        info.fMask = OS.MIIM_STRING;
      } else {
        info.fMask = OS.MIIM_TYPE;
        info.fType = widgetStyle();
      }
      info.dwTypeData = pszText;
      success = OS.SetMenuItemInfo(hMenu, id, false, info);
    }
    if (pszText != 0) OS.HeapFree(hHeap, 0, pszText);
    if (!success) {
      int error = OS.GetLastError();
      SWT.error(
          SWT.ERROR_CANNOT_SET_TEXT,
          null,
          " [GetLastError=0x" + Integer.toHexString(error) + "]"); // $NON-NLS-1$ $NON-NLS-2$
    }
    parent.redraw();
  }