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      1 // Copyright (c) 2011 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 CHROME_BROWSER_CHROMEOS_SETTING_LEVEL_BUBBLE_H_
      6 #define CHROME_BROWSER_CHROMEOS_SETTING_LEVEL_BUBBLE_H_
      7 #pragma once
      8 
      9 #include "base/basictypes.h"
     10 #include "base/timer.h"
     11 #include "chrome/browser/ui/views/bubble/bubble.h"
     12 #include "ui/base/animation/animation_delegate.h"
     13 #include "ui/base/animation/slide_animation.h"
     14 
     15 class SkBitmap;
     16 
     17 namespace chromeos {
     18 
     19 class SettingLevelBubbleView;
     20 
     21 // Singleton class controlling a bubble displaying a level-based setting like
     22 // volume or brightness.
     23 class SettingLevelBubble : public BubbleDelegate,
     24                            public ui::AnimationDelegate {
     25  public:
     26   void ShowBubble(int percent);
     27   void HideBubble();
     28 
     29   // Update the bubble's current level without showing the bubble onscreen.
     30   // We _do_ still animate the level moving to |percent| in case the bubble is
     31   // still visible from a previous call to ShowBubble().
     32   //
     33   // This can be used when the setting has been changed automatically and we
     34   // want to make sure that it's animated from the correct position the next
     35   // time that the bubble is shown.  For example:
     36   //
     37   // 1. Brightness is at 50%.
     38   // 2. Power manager dims brightness to 25% automatically.
     39   // 3. User hits the "increase brightness" button, setting brightness to 30%.
     40   //
     41   // If we didn't update our internal state to 25% after 2), then the animation
     42   // displayed in response to 3) would show the bubble animating from 50% down
     43   // to 30%, rather than from 25% up to 30%.
     44   void UpdateWithoutShowingBubble(int percent);
     45 
     46  protected:
     47   explicit SettingLevelBubble(SkBitmap* increase_icon,
     48                               SkBitmap* decrease_icon,
     49                               SkBitmap* zero_icon);
     50   virtual ~SettingLevelBubble() {}
     51 
     52  private:
     53   void OnTimeout();
     54 
     55   // Overridden from BubbleDelegate.
     56   virtual void BubbleClosing(Bubble* bubble, bool closed_by_escape);
     57   virtual bool CloseOnEscape() { return true; }
     58   virtual bool FadeInOnShow() { return false; }
     59 
     60   // Overridden from ui::AnimationDelegate.
     61   virtual void AnimationEnded(const ui::Animation* animation);
     62   virtual void AnimationProgressed(const ui::Animation* animation);
     63 
     64   // Previous and current percentages, or -1 if not yet shown.
     65   int previous_percent_;
     66   int current_percent_;
     67 
     68   // Icons displayed in the bubble when increasing or decreasing the level or
     69   // setting it to zero.  Not owned by us.
     70   SkBitmap* increase_icon_;
     71   SkBitmap* decrease_icon_;
     72   SkBitmap* zero_icon_;
     73 
     74   // Currently shown bubble or NULL.
     75   Bubble* bubble_;
     76 
     77   // Its contents view, owned by Bubble.
     78   SettingLevelBubbleView* view_;
     79 
     80   ui::SlideAnimation animation_;
     81   base::OneShotTimer<SettingLevelBubble> timeout_timer_;
     82 
     83   DISALLOW_COPY_AND_ASSIGN(SettingLevelBubble);
     84 };
     85 
     86 }  // namespace chromeos
     87 
     88 #endif  // CHROME_BROWSER_CHROMEOS_SETTING_LEVEL_BUBBLE_H_
     89