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.
5 #ifndef ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
6 #define ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
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"
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
{
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
);
31 // Returns the resolution list.
32 ASH_EXPORT
static std::vector
<DisplayMode
> GetExternalDisplayModeList(
33 const ui::DisplayConfigurator::DisplayState
& output
);
35 DisplayChangeObserver();
36 virtual ~DisplayChangeObserver();
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
;
44 // Overriden from ui::DisplayConfigurator::Observer:
45 virtual void OnDisplayModeChanged(
46 const ui::DisplayConfigurator::DisplayStateList
& outputs
) OVERRIDE
;
48 // Overriden from ui::InputDeviceEventObserver:
49 virtual void OnInputDeviceConfigurationChanged() OVERRIDE
;
51 // Overriden from ShellObserver:
52 virtual void OnAppTerminating() OVERRIDE
;
54 // Exposed for testing.
55 ASH_EXPORT
static float FindDeviceScaleFactor(float dpi
);
58 DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserver
);
63 #endif // ASH_DISPLAY_AURA_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H