ui/views/widget/desktop_aura/desktop_cursor_loader_updater.h

   1 // Copyright (c) 2013 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 UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_CURSOR_LOADER_UPDATER_H_
   6 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_CURSOR_LOADER_UPDATER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "ui/views/views_export.h"
  10
  11 namespace aura {
  12 class RootWindow;
  13 }
  14
  15 namespace gfx {
  16 class Display;
  17 }
  18
  19 namespace ui {
  20 class CursorLoader;
  21 }
  22
  23 namespace views {
  24
  25 // An interface to optionally update the state of a cursor loader. Only used on
  26 // desktop AuraX11.
  27 class VIEWS_EXPORT DesktopCursorLoaderUpdater {
  28  public:
  29   virtual ~DesktopCursorLoaderUpdater() {}
  30
  31   // Creates a new DesktopCursorLoaderUpdater, or NULL if the platform doesn't
  32   // support one.
  33   static scoped_ptr<DesktopCursorLoaderUpdater> Create();
  34
  35   // Called when a CursorLoader is created.
  36   virtual void OnCreate(float device_scale_factor,
  37                         ui::CursorLoader* loader) = 0;
  38
  39   // Called when the display has changed (as we may need to reload the cursor
  40   // assets in response to a device scale factor or rotation change).
  41   virtual void OnDisplayUpdated(const gfx::Display& display,
  42                                 ui::CursorLoader* loader) = 0;
  43 };
  44
  45 }  // namespace views
  46
  47 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DISPLAY_CHANGE_HANDLER_H_