components/view_manager/display_manager_delegate.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 COMPONENTS_VIEW_MANAGER_DISPLAY_MANAGER_DELEGATE_H_
   6 #define COMPONENTS_VIEW_MANAGER_DISPLAY_MANAGER_DELEGATE_H_
   7
   8 #include "components/view_manager/public/interfaces/view_manager.mojom.h"
   9
  10 namespace view_manager {
  11
  12 class ServerView;
  13
  14 // A DisplayManagerDelegate an interface to be implemented by an object that
  15 // manages the lifetime of a DisplayManager, forwards events to the appropriate
  16 // views, and responses to changes in viewport size.
  17 class DisplayManagerDelegate {
  18  public:
  19   // Returns the root view of this display.
  20   virtual ServerView* GetRootView() = 0;
  21
  22   // Called when the window managed by the DisplayManager is closed.
  23   virtual void OnDisplayClosed() = 0;
  24
  25   // Called when an event arrives.
  26   virtual void OnEvent(mojo::EventPtr event) = 0;
  27
  28   // Signals that the metrics of this display's viewport has changed.
  29   virtual void OnViewportMetricsChanged(
  30       const mojo::ViewportMetrics& old_metrics,
  31       const mojo::ViewportMetrics& new_metrics) = 0;
  32
  33  protected:
  34   virtual ~DisplayManagerDelegate() {}
  35 };
  36
  37 }  // namespace view_manager
  38
  39 #endif  // COMPONENTS_VIEW_MANAGER_DISPLAY_MANAGER_DELEGATE_H_