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 internal {
  15
  16 namespace {
  17
  18 // Time in ms per throbber frame.
  19 const int kThrobberFrameMs = 30;
  20
  21 // Duration for showing/hiding animation in milliseconds.
  22 const int kThrobberAnimationDurationMs = 200;
  23
  24 }  // namespace
  25
  26 SystemTrayThrobber::SystemTrayThrobber(int frame_delay_ms)
  27     : views::SmoothedThrobber(frame_delay_ms) {
  28 }
  29
  30 SystemTrayThrobber::~SystemTrayThrobber() {
  31 }
  32
  33 void SystemTrayThrobber::SetTooltipText(const string16& tooltip_text) {
  34   tooltip_text_ = tooltip_text;
  35 }
  36
  37 bool SystemTrayThrobber::GetTooltipText(const gfx::Point& p,
  38                                         string16* tooltip) const {
  39   if (tooltip_text_.empty())
  40     return false;
  41
  42   *tooltip = tooltip_text_;
  43   return true;
  44 }
  45
  46 ThrobberView::ThrobberView() {
  47   throbber_ = new SystemTrayThrobber(kThrobberFrameMs);
  48   throbber_->SetFrames(ui::ResourceBundle::GetSharedInstance().GetImageNamed(
  49       IDR_AURA_CROS_DEFAULT_THROBBER).ToImageSkia());
  50   throbber_->set_stop_delay_ms(kThrobberAnimationDurationMs);
  51   AddChildView(throbber_);
  52
  53   SetPaintToLayer(true);
  54   layer()->SetFillsBoundsOpaquely(false);
  55   layer()->SetOpacity(0.0);
  56 }
  57
  58 ThrobberView::~ThrobberView() {
  59 }
  60
  61 gfx::Size ThrobberView::GetPreferredSize() {
  62   return gfx::Size(ash::kTrayPopupItemHeight, ash::kTrayPopupItemHeight);
  63 }
  64
  65 void ThrobberView::Layout() {
  66   View* child = child_at(0);
  67   gfx::Size ps = child->GetPreferredSize();
  68   child->SetBounds((width() - ps.width()) / 2,
  69                    (height() - ps.height()) / 2,
  70                    ps.width(), ps.height());
  71   SizeToPreferredSize();
  72 }
  73
  74 bool ThrobberView::GetTooltipText(const gfx::Point& p,
  75                                   string16* tooltip) const {
  76   if (tooltip_text_.empty())
  77     return false;
  78
  79   *tooltip = tooltip_text_;
  80   return true;
  81 }
  82
  83 void ThrobberView::Start() {
  84   ScheduleAnimation(true);
  85   throbber_->Start();
  86 }
  87
  88 void ThrobberView::Stop() {
  89   ScheduleAnimation(false);
  90   throbber_->Stop();
  91 }
  92
  93 void ThrobberView::SetTooltipText(const string16& tooltip_text) {
  94   tooltip_text_ = tooltip_text;
  95   throbber_->SetTooltipText(tooltip_text);
  96 }
  97
  98 void ThrobberView::ScheduleAnimation(bool start_throbber) {
  99   // Stop any previous animation.
 100   layer()->GetAnimator()->StopAnimating();
 101
 102   ui::ScopedLayerAnimationSettings animation(layer()->GetAnimator());
 103   animation.SetTransitionDuration(
 104       base::TimeDelta::FromMilliseconds(kThrobberAnimationDurationMs));
 105
 106   layer()->SetOpacity(start_throbber ? 1.0 : 0.0);
 107 }
 108
 109 }  // namespace internal
 110 }  // namespace ash