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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- // CTargetedUpdateMenuRegistry.cp
-
- //
- // CTargetedUpdateMenuRegistry is used in conjunction with LEventDispatchers
- // which are CTargetedUpdateMenuRegistry-aware to enable a more targeted
- // update of menus.
- //
- // One common example of this is menu items whose text should change when
- // certain modifiers are held down (Close -> Close All when optionKey is
- // held down, for example).
- //
- // Usage notes for callers of UpdateMenus:
- //
- // (1) Call SetCommands with a list of commands which should be updated.
- // (2) Call UpdateMenus.
- //
- // Usage notes for implementors of UpdateMenus:
- //
- // (1) When looping through commands in menus, determine if the registry
- // is active by calling UseRegistryToUpdateMenus.
- // (2) If the registry is active, then check to see if the command is
- // in the registry by calling CommandInRegistry before processing
- // command status for the command.
- //
- // Note: For the targeted update to be useful, there should generally be
- // a very small number of targeted commands. In fact, command lookup will
- // slow down if there are too many commands.
-
- #include "CTargetedUpdateMenuRegistry.h"
-
- // === Static Members ===
-
- Boolean CTargetedUpdateMenuRegistry::sUseRegistryToUpdateMenus = false;
- list<CommandT> CTargetedUpdateMenuRegistry::sCommands;
-
- // ---------------------------------------------------------------------------
- // Ñ SetCommands
- // ---------------------------------------------------------------------------
-
- void
- CTargetedUpdateMenuRegistry::SetCommands(
- const list<CommandT>& inCommands)
- {
- sCommands = inCommands;
- }
-
- // ---------------------------------------------------------------------------
- // Ñ UpdateMenus
- // ---------------------------------------------------------------------------
-
- void
- CTargetedUpdateMenuRegistry::UpdateMenus()
- {
- if (LEventDispatcher::GetCurrentEventDispatcher())
- {
- StValueChanger<Boolean> setUseRegistryToUpdateMenus(sUseRegistryToUpdateMenus, true);
-
- LEventDispatcher::GetCurrentEventDispatcher()->UpdateMenus();
- }
- }
-
- // ---------------------------------------------------------------------------
- // Ñ CommandInRegistry
- // ---------------------------------------------------------------------------
-
- Boolean
- CTargetedUpdateMenuRegistry::CommandInRegistry(CommandT inCommand)
- {
- list<CommandT>::const_iterator theCommand = find(
- sCommands.begin(),
- sCommands.end(),
- inCommand);
- return (theCommand != sCommands.end());
- }
-