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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef CHROME_VIEWS_CONTROLLER_H_
#define CHROME_VIEWS_CONTROLLER_H_
///////////////////////////////////////////////////////////////////////////////
//
// Controller class
//
// This is the Controller portion of a MVC pattern. It handles dispatching
// commands, maintaining enabled state, and updating the UI as that state
// changes.
//
///////////////////////////////////////////////////////////////////////////////
class Controller {
public:
// Whether or not a command is supported by this controller.
virtual bool SupportsCommand(int id) const = 0;
// Whether or not a command is enabled.
virtual bool IsCommandEnabled(int id) const = 0;
// Assign the provided string with a contextual label. Returns true if a
// contextual label exists and false otherwise. This method can be used when
// implementing a menu or button that needs to have a different label
// depending on the context. If this method returns false, the default
// label used when creating the button or menu is used.
virtual bool GetContextualLabel(int id, std::wstring* out) const = 0;
// Executes a command.
virtual void ExecuteCommand(int id) = 0;
};
#endif // CHROME_VIEWS_CONTROLLER_H_
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