1 files changed, 92 insertions, 0 deletions
diff --git a/athena/system/background_controller.cc b/athena/system/background_controller.cc
new file mode 100644
index 0000000..f4d346a
--- /dev/null
+++ b/athena/system/background_controller.cc
@@ -0,0 +1,92 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "athena/system/background_controller.h"
+
+#include "athena/system/public/system_ui.h"
+#include "ui/aura/window.h"
+#include "ui/compositor/layer.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
+namespace athena {
+
+class BackgroundView : public views::View {
+ public:
+  BackgroundView()
+      : time_view_(SystemUI::Get()->CreateTimeView()),
+        status_icon_view_(SystemUI::Get()->CreateStatusIconView()) {
+    AddChildView(time_view_);
+    AddChildView(status_icon_view_);
+  }
+  virtual ~BackgroundView() {}
+
+  void SetImage(const gfx::ImageSkia& image) {
+    image_ = image;
+    SchedulePaint();
+  }
+
+  // views::View:
+  virtual void Layout() OVERRIDE {
+    time_view_->SetBoundsRect(gfx::Rect(time_view_->GetPreferredSize()));
+    gfx::Size status_icon_preferred_size =
+        status_icon_view_->GetPreferredSize();
+    status_icon_view_->SetBounds(width() - status_icon_preferred_size.width(),
+                                 0,
+                                 status_icon_preferred_size.width(),
+                                 status_icon_preferred_size.height());
+  }
+
+  virtual void ChildPreferredSizeChanged(views::View* child) OVERRIDE {
+    // Relayout when |status_icon_view_| changes its preferred size.
+    Layout();
+  }
+
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
+    canvas->DrawImageInt(image_,
+                         0,
+                         0,
+                         image_.width(),
+                         image_.height(),
+                         0,
+                         0,
+                         width(),
+                         height(),
+                         true);
+  }
+
+ private:
+  gfx::ImageSkia image_;
+  views::View* time_view_;
+  views::View* status_icon_view_;
+
+  DISALLOW_COPY_AND_ASSIGN(BackgroundView);
+};
+
+BackgroundController::BackgroundController(aura::Window* background_container) {
+  views::Widget* background_widget = new views::Widget;
+  views::Widget::InitParams params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  params.parent = background_container;
+  background_widget->Init(params);
+  background_widget->GetNativeWindow()->layer()->SetMasksToBounds(true);
+  background_view_ = new BackgroundView;
+  background_widget->SetContentsView(background_view_);
+  background_widget->GetNativeView()->SetName("BackgroundWidget");
+  background_widget->Show();
+}
+
+BackgroundController::~BackgroundController() {
+  // background_widget is owned by the container and will be deleted
+  // when the container is deleted.
+}
+
+void BackgroundController::SetImage(const gfx::ImageSkia& image) {
+  // TODO(oshima): implement cross fede animation.
+  background_view_->SetImage(image);
+}
+
+}  // namespace athena