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 {
  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.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
  52   params.keep_on_top = true;
  53   // We set the context to the primary root window; this is OK because the ash
  54   // stacking controller will still place us in the correct RootWindow.
  55   params.context = Shell::GetPrimaryRootWindow();
  56   widget->set_focus_on_creation(false);
  57   widget->Init(params);
  58   widget->SetVisibilityChangedAnimationsEnabled(false);
  59   widget->GetNativeWindow()->SetName("SharedEdgeIndicator");
  60   widget->SetContentsView(contents_view);
  61   gfx::Display display = Shell::GetScreen()->GetDisplayMatching(bounds);
  62   aura::Window* window = widget->GetNativeWindow();
  63   aura::client::ScreenPositionClient* screen_position_client =
  64       aura::client::GetScreenPositionClient(window->GetRootWindow());
  65   screen_position_client->SetBounds(window, bounds, display);
  66   widget->Show();
  67   return widget;
  68 }
  69
  70 }  // namespace
  71
  72 SharedDisplayEdgeIndicator::SharedDisplayEdgeIndicator()
  73     : src_indicator_(NULL),
  74       dst_indicator_(NULL) {
  75 }
  76
  77 SharedDisplayEdgeIndicator::~SharedDisplayEdgeIndicator() {
  78   Hide();
  79 }
  80
  81 void SharedDisplayEdgeIndicator::Show(const gfx::Rect& src_bounds,
  82                                       const gfx::Rect& dst_bounds) {
  83   DCHECK(!src_indicator_);
  84   DCHECK(!dst_indicator_);
  85   src_indicator_ = new IndicatorView;
  86   dst_indicator_ = new IndicatorView;
  87   CreateWidget(src_bounds, src_indicator_);
  88   CreateWidget(dst_bounds, dst_indicator_);
  89   animation_.reset(new gfx::ThrobAnimation(this));
  90   animation_->SetThrobDuration(kIndicatorAnimationDurationMs);
  91   animation_->StartThrobbing(-1 /* infinite */);
  92 }
  93
  94 void SharedDisplayEdgeIndicator::Hide() {
  95   if (src_indicator_)
  96     src_indicator_->GetWidget()->Close();
  97   src_indicator_ = NULL;
  98   if (dst_indicator_)
  99     dst_indicator_->GetWidget()->Close();
 100   dst_indicator_ = NULL;
 101 }
 102
 103 void SharedDisplayEdgeIndicator::AnimationProgressed(
 104     const gfx::Animation* animation) {
 105   int value = animation->CurrentValueBetween(0, 255);
 106   SkColor color = SkColorSetARGB(0xFF, value, value, value);
 107   if (src_indicator_)
 108     static_cast<IndicatorView*>(src_indicator_)->SetColor(color);
 109   if (dst_indicator_)
 110     static_cast<IndicatorView*>(dst_indicator_)->SetColor(color);
 111
 112 }
 113
 114 }  // namespace ash