1 files changed, 73 insertions, 0 deletions
diff --git a/chromium/ash/system/brightness/tray_brightness.h b/chromium/ash/system/brightness/tray_brightness.h
new file mode 100644
index 00000000000..ce62154404c
--- /dev/null
+++ b/chromium/ash/system/brightness/tray_brightness.h
@@ -0,0 +1,73 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ASH_SYSTEM_BRIGHTNESS_TRAY_BRIGHTNESS_H_
+#define ASH_SYSTEM_BRIGHTNESS_TRAY_BRIGHTNESS_H_
+
+#include "ash/system/brightness/brightness_observer.h"
+#include "ash/system/tray/system_tray_item.h"
+#include "base/compiler_specific.h"
+#include "base/memory/weak_ptr.h"
+
+namespace ash {
+namespace internal {
+
+namespace tray {
+class BrightnessView;
+}
+
+class TrayBrightness : public SystemTrayItem,
+                       public BrightnessObserver {
+ public:
+  explicit TrayBrightness(SystemTray* system_tray);
+  virtual ~TrayBrightness();
+
+ private:
+  // Sends a request to get the current screen brightness so |current_percent_|
+  // can be initialized.
+  void GetInitialBrightness();
+
+  // Updates |current_percent_| with the initial brightness requested by
+  // GetInitialBrightness(), if we haven't seen the brightness already in the
+  // meantime.
+  void HandleInitialBrightness(double percent);
+
+  // Overridden from SystemTrayItem.
+  virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
+  virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
+  virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
+  virtual void DestroyTrayView() OVERRIDE;
+  virtual void DestroyDefaultView() OVERRIDE;
+  virtual void DestroyDetailedView() OVERRIDE;
+  virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
+  virtual bool ShouldHideArrow() const OVERRIDE;
+  virtual bool ShouldShowLauncher() const OVERRIDE;
+
+  // Overridden from BrightnessObserver.
+  virtual void OnBrightnessChanged(double percent,
+                                   bool user_initiated) OVERRIDE;
+
+  base::WeakPtrFactory<TrayBrightness> weak_ptr_factory_;
+
+  tray::BrightnessView* brightness_view_;
+
+  // Was |brightness_view_| created for CreateDefaultView() rather than
+  // CreateDetailedView()?  Used to avoid resetting |brightness_view_|
+  // inappropriately in DestroyDefaultView() or DestroyDetailedView().
+  bool is_default_view_;
+
+  // Brightness level in the range [0.0, 100.0] that we've heard about most
+  // recently.
+  double current_percent_;
+
+  // Has |current_percent_| been initialized?
+  bool got_current_percent_;
+
+  DISALLOW_COPY_AND_ASSIGN(TrayBrightness);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_BRIGHTNESS_TRAY_BRIGHTNESS_H_