athena/system/background_controller.cc

   1 // Copyright 2014 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 "athena/system/background_controller.h"
   6
   7 #include "athena/system/public/system_ui.h"
   8 #include "ui/aura/window.h"
   9 #include "ui/compositor/layer.h"
  10 #include "ui/gfx/canvas.h"
  11 #include "ui/gfx/image/image_skia.h"
  12 #include "ui/views/view.h"
  13 #include "ui/views/widget/widget.h"
  14
  15 namespace athena {
  16
  17 class BackgroundView : public views::View {
  18  public:
  19   BackgroundView() : system_info_view_(nullptr) {
  20     system_info_view_ =
  21         SystemUI::Get()->CreateSystemInfoView(SystemUI::COLOR_SCHEME_LIGHT);
  22     AddChildView(system_info_view_);
  23   }
  24   ~BackgroundView() override {}
  25
  26   void SetImage(const gfx::ImageSkia& image) {
  27     image_ = image;
  28     SchedulePaint();
  29   }
  30
  31   // views::View:
  32   virtual void Layout() override {
  33     system_info_view_->SetBounds(
  34         0, 0, width(), system_info_view_->GetPreferredSize().height());
  35   }
  36
  37   virtual void OnPaint(gfx::Canvas* canvas) override {
  38     canvas->DrawImageInt(image_,
  39                          0,
  40                          0,
  41                          image_.width(),
  42                          image_.height(),
  43                          0,
  44                          0,
  45                          width(),
  46                          height(),
  47                          true);
  48   }
  49
  50  private:
  51   gfx::ImageSkia image_;
  52   views::View* system_info_view_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(BackgroundView);
  55 };
  56
  57 BackgroundController::BackgroundController(aura::Window* background_container) {
  58   views::Widget* background_widget = new views::Widget;
  59   views::Widget::InitParams params(
  60       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
  61   params.parent = background_container;
  62   background_widget->Init(params);
  63   background_widget->GetNativeWindow()->layer()->SetMasksToBounds(true);
  64   background_view_ = new BackgroundView;
  65   background_widget->SetContentsView(background_view_);
  66   background_widget->GetNativeView()->SetName("BackgroundWidget");
  67   background_widget->Show();
  68 }
  69
  70 BackgroundController::~BackgroundController() {
  71   // background_widget is owned by the container and will be deleted
  72   // when the container is deleted.
  73 }
  74
  75 void BackgroundController::SetImage(const gfx::ImageSkia& image) {
  76   // TODO(oshima): implement cross fede animation.
  77   background_view_->SetImage(image);
  78 }
  79
  80 }  // namespace athena