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