Home | History | Annotate | Download | only in display 
      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
    115