ui/message_center/views/message_center_view.h

// Copyright (c) 2013 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 UI_MESSAGE_CENTER_VIEWS_MESSAGE_CENTER_VIEW_H_
#define UI_MESSAGE_CENTER_VIEWS_MESSAGE_CENTER_VIEW_H_

#include <stddef.h>

#include "base/macros.h"
#include "ui/gfx/animation/animation_delegate.h"
#include "ui/message_center/message_center_export.h"
#include "ui/message_center/message_center_observer.h"
#include "ui/message_center/notification_list.h"
#include "ui/message_center/views/message_center_controller.h"
#include "ui/message_center/views/message_view.h"
#include "ui/views/view.h"

namespace gfx {
class MultiAnimation;
}  // namespace gfx

namespace message_center {

class MessageCenter;
class MessageCenterButtonBar;
class MessageCenterTray;
class MessageView;
class MessageViewContextMenuController;
class MessageListView;
class NotificationView;
class NotifierSettingsView;

// Container for all the top-level views in the notification center, such as the
// button bar, settings view, scrol view, and message list view.  Acts as a
// controller for the message list view, passing data back and forth to message
// center.
class MESSAGE_CENTER_EXPORT MessageCenterView : public views::View,
                                                public MessageCenterObserver,
                                                public MessageCenterController,
                                                public gfx::AnimationDelegate {
 public:
  MessageCenterView(MessageCenter* message_center,
                    MessageCenterTray* tray,
                    int max_height,
                    bool initially_settings_visible,
                    bool top_down,
                    const base::string16& title);
  ~MessageCenterView() override;

  void SetNotifications(const NotificationList::Notifications& notifications);

  void ClearAllClosableNotifications();
  void OnAllNotificationsCleared();

  size_t NumMessageViewsForTest() const;

  void SetSettingsVisible(bool visible);
  void OnSettingsChanged();
  bool settings_visible() const { return settings_visible_; }
  MessageCenterTray* tray() { return tray_; }

  void SetIsClosing(bool is_closing);

 protected:
  // Overridden from views::View:
  void Layout() override;
  gfx::Size GetPreferredSize() const override;
  int GetHeightForWidth(int width) const override;
  bool OnMouseWheel(const ui::MouseWheelEvent& event) override;
  void OnMouseExited(const ui::MouseEvent& event) override;

  // Overridden from MessageCenterObserver:
  void OnNotificationAdded(const std::string& id) override;
  void OnNotificationRemoved(const std::string& id, bool by_user) override;
  void OnNotificationUpdated(const std::string& id) override;

  // Overridden from MessageCenterController:
  void ClickOnNotification(const std::string& notification_id) override;
  void RemoveNotification(const std::string& notification_id,
                          bool by_user) override;
  std::unique_ptr<ui::MenuModel> CreateMenuModel(
      const NotifierId& notifier_id,
      const base::string16& display_source) override;
  bool HasClickedListener(const std::string& notification_id) override;
  void ClickOnNotificationButton(const std::string& notification_id,
                                 int button_index) override;
  void ClickOnSettingsButton(const std::string& notification_id) override;

  // Overridden from gfx::AnimationDelegate:
  void AnimationEnded(const gfx::Animation* animation) override;
  void AnimationProgressed(const gfx::Animation* animation) override;
  void AnimationCanceled(const gfx::Animation* animation) override;

 private:
  friend class MessageCenterViewTest;

  void AddNotificationAt(const Notification& notification, int index);
  void NotificationsChanged();
  void SetNotificationViewForTest(MessageView* view);

  MessageCenter* message_center_;  // Weak reference.
  MessageCenterTray* tray_;  // Weak reference.

  // Map notification_id->NotificationView*. It contains all NotificationViews
  // currently displayed in MessageCenter.
  typedef std::map<std::string, NotificationView*> NotificationViewsMap;
  NotificationViewsMap notification_views_;  // Weak.

  // Child views.
  views::ScrollView* scroller_;
  std::unique_ptr<MessageListView> message_list_view_;
  std::unique_ptr<views::View> empty_list_view_;
  NotifierSettingsView* settings_view_;
  MessageCenterButtonBar* button_bar_;
  bool top_down_;

  // Data for transition animation between settings view and message list.
  bool settings_visible_;

  // Animation managing transition between message center and settings (and vice
  // versa).
  std::unique_ptr<gfx::MultiAnimation> settings_transition_animation_;

  // Helper data to keep track of the transition between settings and
  // message center views.
  views::View* source_view_;
  int source_height_;
  views::View* target_view_;
  int target_height_;

  // True when the widget is closing so that further operations should be
  // ignored.
  bool is_closing_;

  std::unique_ptr<MessageViewContextMenuController> context_menu_controller_;

  DISALLOW_COPY_AND_ASSIGN(MessageCenterView);
};

}  // namespace message_center

#endif  // UI_MESSAGE_CENTER_VIEWS_MESSAGE_CENTER_VIEW_H_