aura: brightness and volume bubble.

chrome/browser/chromeos/brightness_bubble.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/chromeos/brightness_bubble.h"
 
 #include "base/memory/singleton.h"
 #include "grit/theme_resources.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "views/widget/widget.h"
 
 namespace chromeos {
 
-BrightnessBubble::BrightnessBubble()
-    : SettingLevelBubble(
-          ResourceBundle::GetSharedInstance().GetBitmapNamed(
-              IDR_BRIGHTNESS_BUBBLE_ICON),
-          ResourceBundle::GetSharedInstance().GetBitmapNamed(
-              IDR_BRIGHTNESS_BUBBLE_ICON),
-          ResourceBundle::GetSharedInstance().GetBitmapNamed(
-              IDR_BRIGHTNESS_BUBBLE_ICON)) {
-}
-
 // static
 BrightnessBubble* BrightnessBubble::GetInstance() {
   return Singleton<BrightnessBubble>::get();
 }
 
+void BrightnessBubble::OnWidgetClosing(views::Widget* widget) {
+  // Bubble faded out.
+  if (widget_ == widget)
+    widget_closed_ = true;

[Daniel Erat, 2011/10/24 15:52:10]

i don't understand why you need a widget_closed_ member.  wouldn't it be
equivalent and simpler to just set widget_ to NULL here?

[alicet1, 2011/10/24 17:41:36]

actually, yes!

+}
+
+void BrightnessBubble::ShowBubble(double percent, bool enabled) {
+  MaybeCreateWidget(percent, enabled);
+  SettingLevelBubble::ShowBubble(widget_, percent, enabled);
+}
+
+void BrightnessBubble::UpdateWithoutShowingBubble(double percent,
+                                                  bool enabled) {
+  MaybeCreateWidget(percent, enabled);
+  static_cast<SettingLevelBubble*>(widget_->widget_delegate())
+      ->UpdateWithoutShowingBubble(percent, enabled);
+}
+
+void BrightnessBubble::HideBubble() {
+  if (widget_ && !widget_closed_) {
+    widget_->RemoveObserver(this);
+    widget_->Close();
+  }
+}
+
+BrightnessBubble::BrightnessBubble()
+    : widget_(NULL),
+      widget_closed_(false) {}
+
+BrightnessBubble::~BrightnessBubble() {
+  if (widget_ && !widget_closed_) {
+    widget_->RemoveObserver(this);
+    widget_closed_ = true;
+    widget_ = NULL;
+  }
+}
+
+void BrightnessBubble::MaybeCreateWidget(double percent, bool enabled) {
+  if (!widget_ || widget_closed_) {
+    widget_ = SettingLevelBubble::CreateBubble(
+        ResourceBundle::GetSharedInstance().GetBitmapNamed(
+            IDR_BRIGHTNESS_BUBBLE_ICON),
+        ResourceBundle::GetSharedInstance().GetBitmapNamed(
+            IDR_BRIGHTNESS_BUBBLE_ICON),
+        ResourceBundle::GetSharedInstance().GetBitmapNamed(
+            IDR_BRIGHTNESS_BUBBLE_ICON),
+        percent,
+        enabled);
+    widget_->AddObserver(this);
+    widget_closed_ = false;
+  }
+}
+
 }  // namespace chromeos