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 <vector>
   9
  10 #include "ash/ash_export.h"
  11 #include "ash/shell_observer.h"
  12 #include "base/basictypes.h"
  13 #include "ui/display/chromeos/display_configurator.h"
  14 #include "ui/events/devices/input_device_event_observer.h"
  15
  16 namespace ash {
  17
  18 class DisplayInfo;
  19 struct DisplayMode;
  20
  21 // An object that observes changes in display configuration and
  22 // update DisplayManagers.
  23 class DisplayChangeObserver : public ui::DisplayConfigurator::StateController,
  24                               public ui::DisplayConfigurator::Observer,
  25                               public ui::InputDeviceEventObserver,
  26                               public ShellObserver {
  27  public:
  28   // Returns the mode list for internal display.
  29   ASH_EXPORT static std::vector<DisplayMode> GetInternalDisplayModeList(
  30       const DisplayInfo& display_info,
  31       const ui::DisplayConfigurator::DisplayState& output);
  32
  33   // Returns the resolution list.
  34   ASH_EXPORT static std::vector<DisplayMode> GetExternalDisplayModeList(
  35       const ui::DisplayConfigurator::DisplayState& output);
  36
  37   DisplayChangeObserver();
  38   ~DisplayChangeObserver() override;
  39
  40   // ui::DisplayConfigurator::StateController overrides:
  41   ui::MultipleDisplayState GetStateForDisplayIds(
  42       const std::vector<int64>& outputs) const override;
  43   bool GetResolutionForDisplayId(int64 display_id,
  44                                  gfx::Size* size) const override;
  45
  46   // Overriden from ui::DisplayConfigurator::Observer:
  47   void OnDisplayModeChanged(
  48       const ui::DisplayConfigurator::DisplayStateList& outputs) override;
  49
  50   // Overriden from ui::InputDeviceEventObserver:
  51   void OnTouchscreenDeviceConfigurationChanged() override;
  52   void OnKeyboardDeviceConfigurationChanged() override;
  53   void OnMouseDeviceConfigurationChanged() override;
  54   void OnTouchpadDeviceConfigurationChanged() override;
  55
  56   // Overriden from ShellObserver:
  57   void OnAppTerminating() override;
  58
  59   // Exposed for testing.
  60   ASH_EXPORT static float FindDeviceScaleFactor(float dpi);
  61
  62  private:
  63   DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserver);
  64 };
  65
  66 }  // namespace ash
  67
  68 #endif  // ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H_