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