Add spinner UI to show bluetooth is discovering devices.

ui/views/controls/throbber.cc

 // 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.
 
 #include "ui/views/controls/throbber.h"
 
 #include "base/time.h"
 #include "grit/ui_resources.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_skia.h"
 
 using base::Time;
 using base::TimeDelta;
 
 namespace views {
 
 Throbber::Throbber(int frame_time_ms,
                    bool paint_while_stopped)
     : running_(false),
       paint_while_stopped_(paint_while_stopped),
       frames_(NULL),
-      frame_time_(TimeDelta::FromMilliseconds(frame_time_ms)) {
+      frame_time_(TimeDelta::FromMilliseconds(frame_time_ms)),
+      interactive_(true) {
   SetFrames(ui::ResourceBundle::GetSharedInstance().GetImageNamed(
       IDR_THROBBER).ToImageSkia());
 }
 
 Throbber::~Throbber() {
   Stop();
 }
 
 void Throbber::Start() {
   if (running_)
@@ skipping 46 matching lines @@
       static_cast<int>(elapsed_time / frame_time_) % frame_count_;
 
   int image_size = frames_->height();
   int image_offset = current_frame * image_size;
   canvas->DrawImageInt(*frames_,
                        image_offset, 0, image_size, image_size,
                        0, 0, image_size, image_size,
                        false);
 }
 
-
+bool Throbber::HitTestRect(const gfx::Rect& rect) const {
+  return interactive_ ? View::HitTestRect(rect) : false;

[sky, 2013/02/05 15:58:52]

Why do you need this? Rather than adding set_interactive can't you use
set_enabled?

[jennyz, 2013/02/05 17:37:20]

Yes, you are right, I can just use set_enabled, removed set_interactive. Thanks!

+}
 
 // Smoothed throbber ---------------------------------------------------------
 
 
 // Delay after work starts before starting throbber, in milliseconds.
 static const int kStartDelay = 200;
 
 // Delay after work stops before stopping, in milliseconds.
 static const int kStopDelay = 50;
 
@@ skipping 57 matching lines @@
   }
   // Otherwise we paint our tick mark or nothing depending on our state.
   if (checked_) {
     int checkmark_x = (width() - checkmark_->width()) / 2;
     int checkmark_y = (height() - checkmark_->height()) / 2;
     canvas->DrawImageInt(*checkmark_, checkmark_x, checkmark_y);
   }
 }
 
 }  // namespace views