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/aura/window_event_dispatcher.h"
  13 #include "ui/gfx/animation/throb_animation.h"
  14 #include "ui/gfx/canvas.h"
  15 #include "ui/gfx/display.h"
  16 #include "ui/gfx/screen.h"
  17 #include "ui/views/view.h"
  18 #include "ui/views/widget/widget.h"
  19
  20 namespace ash {
  21 namespace internal {
  22 namespace {
  23
  24 const int kIndicatorAnimationDurationMs = 1000;
  25
  26 class IndicatorView : public views::View {
  27  public:
  28   IndicatorView() {
  29   }
  30   virtual ~IndicatorView() {
  31   }
  32
  33   void SetColor(SkColor color) {
  34     color_ = color;
  35     SchedulePaint();
  36   }
  37
  38   // views::Views overrides:
  39   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
  40     canvas->FillRect(gfx::Rect(bounds().size()), color_);
  41   }
  42
  43  private:
  44   SkColor color_;
  45   DISALLOW_COPY_AND_ASSIGN(IndicatorView);
  46 };
  47
  48 views::Widget* CreateWidget(const gfx::Rect& bounds,
  49                             views::View* contents_view) {
  50   views::Widget* widget = new views::Widget;
  51   views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
  52   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
  53   params.can_activate = false;
  54   params.keep_on_top = true;
  55   // We set the context to the primary root window; this is OK because the ash
  56   // stacking controller will still place us in the correct RootWindow.
  57   params.context = Shell::GetPrimaryRootWindow();
  58   widget->set_focus_on_creation(false);
  59   widget->Init(params);
  60   widget->SetVisibilityChangedAnimationsEnabled(false);
  61   widget->GetNativeWindow()->SetName("SharedEdgeIndicator");
  62   widget->SetContentsView(contents_view);
  63   gfx::Display display = Shell::GetScreen()->GetDisplayMatching(bounds);
  64   aura::Window* window = widget->GetNativeWindow();
  65   aura::client::ScreenPositionClient* screen_position_client =
  66       aura::client::GetScreenPositionClient(window->GetRootWindow());
  67   screen_position_client->SetBounds(window, bounds, display);
  68   widget->Show();
  69   return widget;
  70 }
  71
  72 }  // namespace
  73
  74 SharedDisplayEdgeIndicator::SharedDisplayEdgeIndicator()
  75     : src_indicator_(NULL),
  76       dst_indicator_(NULL) {
  77 }
  78
  79 SharedDisplayEdgeIndicator::~SharedDisplayEdgeIndicator() {
  80   Hide();
  81 }
  82
  83 void SharedDisplayEdgeIndicator::Show(const gfx::Rect& src_bounds,
  84                                       const gfx::Rect& dst_bounds) {
  85   DCHECK(!src_indicator_);
  86   DCHECK(!dst_indicator_);
  87   src_indicator_ = new IndicatorView;
  88   dst_indicator_ = new IndicatorView;
  89   CreateWidget(src_bounds, src_indicator_);
  90   CreateWidget(dst_bounds, dst_indicator_);
  91   animation_.reset(new gfx::ThrobAnimation(this));
  92   animation_->SetThrobDuration(kIndicatorAnimationDurationMs);
  93   animation_->StartThrobbing(-1 /* infinite */);
  94 }
  95
  96 void SharedDisplayEdgeIndicator::Hide() {
  97   if (src_indicator_)
  98     src_indicator_->GetWidget()->Close();
  99   src_indicator_ = NULL;
 100   if (dst_indicator_)
 101     dst_indicator_->GetWidget()->Close();
 102   dst_indicator_ = NULL;
 103 }
 104
 105 void SharedDisplayEdgeIndicator::AnimationProgressed(
 106     const gfx::Animation* animation) {
 107   int value = animation->CurrentValueBetween(0, 255);
 108   SkColor color = SkColorSetARGB(0xFF, value, value, value);
 109   if (src_indicator_)
 110     static_cast<IndicatorView*>(src_indicator_)->SetColor(color);
 111   if (dst_indicator_)
 112     static_cast<IndicatorView*>(dst_indicator_)->SetColor(color);
 113
 114 }
 115
 116 }  // namespace internal
 117 }  // namespace ash