ash/display/display_change_observer_chromeos.h

   1 // Copyright 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 ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
   6 #define ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/shell_observer.h"
  10 #include "base/basictypes.h"
  11 #include "ui/display/chromeos/display_configurator.h"
  12 #include "ui/events/input_device_event_observer.h"
  13
  14 namespace ash {
  15
  16 class DisplayInfo;
  17 struct DisplayMode;
  18
  19 // An object that observes changes in display configuration and
  20 // update DisplayManagers.
  21 class DisplayChangeObserver : public ui::DisplayConfigurator::StateController,
  22                               public ui::DisplayConfigurator::Observer,
  23                               public ui::InputDeviceEventObserver,
  24                               public ShellObserver {
  25  public:
  26   // Returns the mode list for internal display.
  27   ASH_EXPORT static std::vector<DisplayMode> GetInternalDisplayModeList(
  28       const DisplayInfo& display_info,
  29       const ui::DisplayConfigurator::DisplayState& output);
  30
  31   // Returns the resolution list.
  32   ASH_EXPORT static std::vector<DisplayMode> GetExternalDisplayModeList(
  33       const ui::DisplayConfigurator::DisplayState& output);
  34
  35   DisplayChangeObserver();
  36   virtual ~DisplayChangeObserver();
  37
  38   // ui::DisplayConfigurator::StateController overrides:
  39   virtual ui::MultipleDisplayState GetStateForDisplayIds(
  40       const std::vector<int64>& outputs) const override;
  41   virtual bool GetResolutionForDisplayId(int64 display_id,
  42                                          gfx::Size* size) const override;
  43
  44   // Overriden from ui::DisplayConfigurator::Observer:
  45   virtual void OnDisplayModeChanged(
  46       const ui::DisplayConfigurator::DisplayStateList& outputs) override;
  47
  48   // Overriden from ui::InputDeviceEventObserver:
  49   virtual void OnInputDeviceConfigurationChanged() override;
  50
  51   // Overriden from ShellObserver:
  52   virtual void OnAppTerminating() override;
  53
  54   // Exposed for testing.
  55   ASH_EXPORT static float FindDeviceScaleFactor(float dpi);
  56
  57  private:
  58   DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserver);
  59 };
  60
  61 }  // namespace ash
  62
  63 #endif  // ASH_DISPLAY_AURA_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H