ash/display/shared_display_edge_indicator.cc

   1 // Copyright (c) 2012 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/display/shared_display_edge_indicator.h"
   6
   7 #include "ash/shell.h"
   8 #include "ash/shell_window_ids.h"
   9 #include "ash/wm/coordinate_conversion.h"
  10 #include "third_party/skia/include/core/SkColor.h"
  11 #include "ui/aura/client/screen_position_client.h"
  12 #include "ui/base/animation/throb_animation.h"
  13 #include "ui/gfx/canvas.h"
  14 #include "ui/gfx/display.h"
  15 #include "ui/gfx/screen.h"
  16 #include "ui/views/view.h"
  17 #include "ui/views/widget/widget.h"
  18
  19 namespace ash {
  20 namespace internal {
  21 namespace {
  22
  23 const int kIndicatorAnimationDurationMs = 1000;
  24
  25 class IndicatorView : public views::View {
  26  public:
  27   IndicatorView() {
  28   }
  29   virtual ~IndicatorView() {
  30   }
  31
  32   void SetColor(SkColor color) {
  33     color_ = color;
  34     SchedulePaint();
  35   }
  36
  37   // views::Views overrides:
  38   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
  39     canvas->FillRect(gfx::Rect(bounds().size()), color_);
  40   }
  41
  42  private:
  43   SkColor color_;
  44   DISALLOW_COPY_AND_ASSIGN(IndicatorView);
  45 };
  46
  47 views::Widget* CreateWidget(const gfx::Rect& bounds,
  48                             views::View* contents_view) {
  49   views::Widget* widget = new views::Widget;
  50   views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
  51   params.transparent = true;
  52   params.can_activate = false;
  53   params.keep_on_top = true;
  54   widget->set_focus_on_creation(false);
  55   widget->Init(params);
  56   widget->SetVisibilityChangedAnimationsEnabled(false);
  57   widget->GetNativeWindow()->SetName("SharedEdgeIndicator");
  58   widget->SetContentsView(contents_view);
  59   gfx::Display display = Shell::GetScreen()->GetDisplayMatching(bounds);
  60   aura::Window* window = widget->GetNativeWindow();
  61   aura::client::ScreenPositionClient* screen_position_client =
  62       aura::client::GetScreenPositionClient(window->GetRootWindow());
  63   screen_position_client->SetBounds(window, bounds, display);
  64   widget->Show();
  65   return widget;
  66 }
  67
  68 }  // namespace
  69
  70 SharedDisplayEdgeIndicator::SharedDisplayEdgeIndicator()
  71     : src_indicator_(NULL),
  72       dst_indicator_(NULL) {
  73 }
  74
  75 SharedDisplayEdgeIndicator::~SharedDisplayEdgeIndicator() {
  76   Hide();
  77 }
  78
  79 void SharedDisplayEdgeIndicator::Show(const gfx::Rect& src_bounds,
  80                                       const gfx::Rect& dst_bounds) {
  81   DCHECK(!src_indicator_);
  82   DCHECK(!dst_indicator_);
  83   src_indicator_ = new IndicatorView;
  84   dst_indicator_ = new IndicatorView;
  85   CreateWidget(src_bounds, src_indicator_);
  86   CreateWidget(src_bounds, dst_indicator_);
  87   animation_.reset(new ui::ThrobAnimation(this));
  88   animation_->SetThrobDuration(kIndicatorAnimationDurationMs);
  89   animation_->StartThrobbing(-1 /* infinite */);
  90 }
  91
  92 void SharedDisplayEdgeIndicator::Hide() {
  93   if (src_indicator_)
  94     src_indicator_->GetWidget()->Close();
  95   src_indicator_ = NULL;
  96   if (dst_indicator_)
  97     dst_indicator_->GetWidget()->Close();
  98   dst_indicator_ = NULL;
  99 }
 100
 101 void SharedDisplayEdgeIndicator::AnimationProgressed(
 102     const ui::Animation* animation) {
 103   int value = animation->CurrentValueBetween(0, 255);
 104   SkColor color = SkColorSetARGB(0xFF, value, value, value);
 105   if (src_indicator_)
 106     static_cast<IndicatorView*>(src_indicator_)->SetColor(color);
 107   if (dst_indicator_)
 108     static_cast<IndicatorView*>(dst_indicator_)->SetColor(color);
 109
 110 }
 111
 112 }  // namespace internal
 113 }  // namespace ash