views/widget/widget_delegate.h

// Copyright (c) 2006-2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef VIEWS_WIDGET_WIDGET_DELEGATE_H_
#define VIEWS_WIDGET_WIDGET_DELEGATE_H_
#pragma once

namespace views {

// WidgetDelegate interface
// Handles events on Widgets in context-specific ways.
class WidgetDelegate {
 public:
  virtual ~WidgetDelegate() {}

  // Called with the display changes (color depth or resolution).
  virtual void DisplayChanged() {}

  // Called when widget active state has changed.
  virtual void IsActiveChanged(bool active) {}

  // Called when the work area (the desktop area minus taskbars,
  // menubars, etc.) changes in size.
  virtual void WorkAreaChanged() {}
};

}  // namespace views

#endif  // VIEWS_WIDGET_WIDGET_DELEGATE_H_