chrome/browser/task_management/providers/task_provider_observer.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_TASK_MANAGEMENT_PROVIDERS_TASK_PROVIDER_OBSERVER_H_
   6 #define CHROME_BROWSER_TASK_MANAGEMENT_PROVIDERS_TASK_PROVIDER_OBSERVER_H_
   7
   8 #include "chrome/browser/task_management/providers/task.h"
   9
  10 namespace task_management {
  11
  12 // Defines an interface for observing tasks addition / removal.
  13 class TaskProviderObserver {
  14  public:
  15   TaskProviderObserver() {}
  16   virtual ~TaskProviderObserver() {}
  17
  18   // This notifies of the event that a new |task| has been created.
  19   virtual void TaskAdded(Task* task) = 0;
  20
  21   // This notifies of the event that a |task| is about to be removed. The task
  22   // is still valid during this call, after that it may never be used again by
  23   // the observer and references to it must not be kept.
  24   virtual void TaskRemoved(Task* task) = 0;
  25
  26  private:
  27   DISALLOW_COPY_AND_ASSIGN(TaskProviderObserver);
  28 };
  29
  30 }  // namespace task_management
  31
  32 #endif  // CHROME_BROWSER_TASK_MANAGEMENT_PROVIDERS_TASK_PROVIDER_OBSERVER_H_