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