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 ui {
  19 struct TextInputState;
  20 }
  21
  22 namespace view_manager {
  23
  24 class ServerView;
  25
  26 // TODO(sky): rename to OnDid and OnWill everywhere.
  27 class ServerViewObserver {
  28  public:
  29   // Invoked when a view is about to be destroyed; before any of the children
  30   // have been removed and before the view has been removed from its parent.
  31   virtual void OnWillDestroyView(ServerView* view) {}
  32
  33   // Invoked at the end of the View's destructor (after it has been removed from
  34   // the hierarchy).
  35   virtual void OnViewDestroyed(ServerView* view) {}
  36
  37   virtual void OnWillChangeViewHierarchy(ServerView* view,
  38                                          ServerView* new_parent,
  39                                          ServerView* old_parent) {}
  40
  41   virtual void OnViewHierarchyChanged(ServerView* view,
  42                                       ServerView* new_parent,
  43                                       ServerView* old_parent) {}
  44
  45   virtual void OnViewBoundsChanged(ServerView* view,
  46                                    const gfx::Rect& old_bounds,
  47                                    const gfx::Rect& new_bounds) {}
  48
  49   virtual void OnViewReordered(ServerView* view,
  50                                ServerView* relative,
  51                                mojo::OrderDirection direction) {}
  52
  53   virtual void OnWillChangeViewVisibility(ServerView* view) {}
  54   virtual void OnViewVisibilityChanged(ServerView* view) {}
  55
  56   virtual void OnViewTextInputStateChanged(ServerView* view,
  57                                            const ui::TextInputState& state) {}
  58
  59   virtual void OnViewSharedPropertyChanged(
  60       ServerView* view,
  61       const std::string& name,
  62       const std::vector<uint8_t>* new_data) {}
  63
  64  protected:
  65   virtual ~ServerViewObserver() {}
  66 };
  67
  68 }  // namespace view_manager
  69
  70 #endif  // COMPONENTS_VIEW_MANAGER_SERVER_VIEW_OBSERVER_H_