components/view_manager/server_view_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 COMPONENTS_VIEW_MANAGER_SERVER_VIEW_OBSERVER_H_
   6 #define COMPONENTS_VIEW_MANAGER_SERVER_VIEW_OBSERVER_H_
   7
   8 #include "components/view_manager/public/interfaces/view_manager_constants.mojom.h"
   9
  10 namespace gfx {
  11 class Rect;
  12 }
  13
  14 namespace mojo {
  15 class ViewportMetrics;
  16 }
  17
  18 namespace view_manager {
  19
  20 class ServerView;
  21
  22 // TODO(sky): rename to OnDid and OnWill everywhere.
  23 class ServerViewObserver {
  24  public:
  25   // Invoked when a view is about to be destroyed; before any of the children
  26   // have been removed and before the view has been removed from its parent.
  27   virtual void OnWillDestroyView(ServerView* view) {}
  28
  29   // Invoked at the end of the View's destructor (after it has been removed from
  30   // the hierarchy).
  31   virtual void OnViewDestroyed(ServerView* view) {}
  32
  33   virtual void OnWillChangeViewHierarchy(ServerView* view,
  34                                          ServerView* new_parent,
  35                                          ServerView* old_parent) {}
  36
  37   virtual void OnViewHierarchyChanged(ServerView* view,
  38                                       ServerView* new_parent,
  39                                       ServerView* old_parent) {}
  40
  41   virtual void OnViewBoundsChanged(ServerView* view,
  42                                    const gfx::Rect& old_bounds,
  43                                    const gfx::Rect& new_bounds) {}
  44
  45   virtual void OnViewReordered(ServerView* view,
  46                                ServerView* relative,
  47                                mojo::OrderDirection direction) {}
  48
  49   virtual void OnWillChangeViewVisibility(ServerView* view) {}
  50   virtual void OnViewVisibilityChanged(ServerView* view) {}
  51
  52   virtual void OnViewSharedPropertyChanged(
  53       ServerView* view,
  54       const std::string& name,
  55       const std::vector<uint8_t>* new_data) {}
  56
  57  protected:
  58   virtual ~ServerViewObserver() {}
  59 };
  60
  61 }  // namespace view_manager
  62
  63 #endif  // COMPONENTS_VIEW_MANAGER_SERVER_VIEW_OBSERVER_H_