ash/system/tray/throbber_view.cc

   1 // Copyright (c) 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.
   4
   5 #include "ash/system/tray/throbber_view.h"
   6
   7 #include "ash/system/tray/tray_constants.h"
   8 #include "grit/ash_resources.h"
   9 #include "ui/base/resource/resource_bundle.h"
  10 #include "ui/compositor/layer.h"
  11 #include "ui/compositor/scoped_layer_animation_settings.h"
  12
  13 namespace ash {
  14 namespace {
  15
  16 // Time in ms per throbber frame.
  17 const int kThrobberFrameMs = 30;
  18
  19 // Duration for showing/hiding animation in milliseconds.
  20 const int kThrobberAnimationDurationMs = 200;
  21
  22 }  // namespace
  23
  24 SystemTrayThrobber::SystemTrayThrobber(int frame_delay_ms)
  25     : views::SmoothedThrobber(frame_delay_ms) {
  26 }
  27
  28 SystemTrayThrobber::~SystemTrayThrobber() {
  29 }
  30
  31 void SystemTrayThrobber::SetTooltipText(const base::string16& tooltip_text) {
  32   tooltip_text_ = tooltip_text;
  33 }
  34
  35 bool SystemTrayThrobber::GetTooltipText(const gfx::Point& p,
  36                                         base::string16* tooltip) const {
  37   if (tooltip_text_.empty())
  38     return false;
  39
  40   *tooltip = tooltip_text_;
  41   return true;
  42 }
  43
  44 ThrobberView::ThrobberView() {
  45   throbber_ = new SystemTrayThrobber(kThrobberFrameMs);
  46   throbber_->SetFrames(ui::ResourceBundle::GetSharedInstance().GetImageNamed(
  47       IDR_AURA_CROS_DEFAULT_THROBBER).ToImageSkia());
  48   throbber_->set_stop_delay_ms(kThrobberAnimationDurationMs);
  49   AddChildView(throbber_);
  50
  51   SetPaintToLayer(true);
  52   layer()->SetFillsBoundsOpaquely(false);
  53   layer()->SetOpacity(0.0);
  54 }
  55
  56 ThrobberView::~ThrobberView() {
  57 }
  58
  59 gfx::Size ThrobberView::GetPreferredSize() const {
  60   return gfx::Size(ash::kTrayPopupItemHeight, ash::kTrayPopupItemHeight);
  61 }
  62
  63 void ThrobberView::Layout() {
  64   View* child = child_at(0);
  65   gfx::Size ps = child->GetPreferredSize();
  66   child->SetBounds((width() - ps.width()) / 2,
  67                    (height() - ps.height()) / 2,
  68                    ps.width(), ps.height());
  69   SizeToPreferredSize();
  70 }
  71
  72 bool ThrobberView::GetTooltipText(const gfx::Point& p,
  73                                   base::string16* tooltip) const {
  74   if (tooltip_text_.empty())
  75     return false;
  76
  77   *tooltip = tooltip_text_;
  78   return true;
  79 }
  80
  81 void ThrobberView::Start() {
  82   ScheduleAnimation(true);
  83   throbber_->Start();
  84 }
  85
  86 void ThrobberView::Stop() {
  87   ScheduleAnimation(false);
  88   throbber_->Stop();
  89 }
  90
  91 void ThrobberView::SetTooltipText(const base::string16& tooltip_text) {
  92   tooltip_text_ = tooltip_text;
  93   throbber_->SetTooltipText(tooltip_text);
  94 }
  95
  96 void ThrobberView::ScheduleAnimation(bool start_throbber) {
  97   // Stop any previous animation.
  98   layer()->GetAnimator()->StopAnimating();
  99
 100   ui::ScopedLayerAnimationSettings animation(layer()->GetAnimator());
 101   animation.SetTransitionDuration(
 102       base::TimeDelta::FromMilliseconds(kThrobberAnimationDurationMs));
 103
 104   layer()->SetOpacity(start_throbber ? 1.0 : 0.0);
 105 }
 106
 107 }  // namespace ash