gecko/layout/xul/base/src/nsMenuParent.h

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
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 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Dean Tessman <dean_tessman@hotmail.com>
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#ifndef nsMenuParent_h___
#define nsMenuParent_h___

class nsMenuFrame;

/*
 * nsMenuParent is an interface implemented by nsMenuBarFrame and nsMenuPopupFrame
 * as both serve as parent frames to nsMenuFrame.
 *
 * Don't implement this interface on other classes unless you also fix up references,
 * as this interface is directly cast to and from nsMenuBarFrame and nsMenuPopupFrame.
 */

class nsMenuParent {

public:
  // returns the menu frame of the currently active item within the menu
  virtual nsMenuFrame *GetCurrentMenuItem() = 0;
  // sets the currently active menu frame.
  NS_IMETHOD SetCurrentMenuItem(nsMenuFrame* aMenuItem) = 0;
  // indicate that the current menu frame is being destroyed, so clear the
  // current menu item
  virtual void CurrentMenuIsBeingDestroyed() = 0;
  // deselects the current item and closes its popup if any, then selects the
  // new item aMenuItem. For a menubar, if another menu is already open, the
  // new menu aMenuItem is opened. In this case, if aSelectFirstItem is true,
  // select the first item in it. For menupopups, the menu is not opened and
  // the aSelectFirstItem argument is not used.
  NS_IMETHOD ChangeMenuItem(nsMenuFrame* aMenuItem, bool aSelectFirstItem) = 0;

  // returns true if the menupopup is open. For menubars, returns false.
  virtual bool IsOpen() = 0;
  // returns true if the menubar is currently active. For menupopups, returns false.
  virtual bool IsActive() = 0;
  // returns true if this is a menubar. If false, it is a popup
  virtual bool IsMenuBar() = 0;
  // returns true if this is a menu, which has a tag of menupopup or popup.
  // Otherwise, this returns false
  virtual bool IsMenu() = 0;
  // returns true if this is a context menu
  virtual bool IsContextMenu() = 0;

  // indicate that the menubar should become active or inactive
  NS_IMETHOD SetActive(bool aActiveFlag) = 0;

  // notify that the menu has been closed and any active state should be
  // cleared. This should return true if the menu should be deselected
  // by the caller.
  virtual bool MenuClosed() = 0;

  // Lock this menu and its parents until they're closed or unlocked.
  // A menu being "locked" means that all events inside it that would change the
  // selected menu item should be ignored.
  // This is used when closing the popup is delayed because of a blink or fade
  // animation.
  virtual void LockMenuUntilClosed(bool aLock) = 0;
  virtual bool IsMenuLocked() = 0;
};

#endif