Add initial home card impl.

athena/home/home_card_delegate_view.cc

+// 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/home/home_card_delegate_view.h"
+
+#include "ui/views/background.h"
+#include "ui/views/border.h"
+#include "ui/views/widget/widget.h"
+
+namespace athena {
+
+HomeCardDelegateView::HomeCardDelegateView() {
+  const SkColor kHomeTopColor = 0xDDFFFFFF;

[Mr4D (OOO till 08-26), 2014/05/22 20:53:28]

Could you please move these constants out into the namespace and comment what
they do? Make it easier to change and modify them later.

[Mr4D (OOO till 08-26), 2014/05/22 22:19:15]

Again - extracting them in one point feels like a good thing. In fact - since we
are starting now a new shell we might even accumulate all these constants in one
place / file. That way it would have all colors / width / sizes / UI constants
in one "metric" file. Something which I would have liked to see in ash as well.
But I leave this up to you.

[oshima, 2014/05/23 14:54:37]

Well, this code is pure place holder, and the color and apparance are picked
randomly.
I do agree that we may want to put this is resource file (like android), and we
should discuss that. Similar suggestion came up in the past but, UX designers
preferred
using image file to control the color because they can just create an asset to
change the color.

[Mr4D (OOO till 08-26), 2014/05/23 15:29:26]

We will have colors and we will get more. Even if this is only a placeholder -
it is a precedent and others will follow. So it makes sense to start from the
beginning. But again - your choice.

+  const SkColor kHomeBottomColor = 0xAAEEEEEE;
+  set_background(views::Background::CreateVerticalGradientBackground(
+      kHomeTopColor, kHomeBottomColor));
+  scoped_ptr<views::Border> border(
+      views::Border::CreateSolidBorder(5, 0xDDFFFFFF));
+  SetBorder(border.Pass());
+}
+
+HomeCardDelegateView::~HomeCardDelegateView() {
+}
+
+void HomeCardDelegateView::OnMouseEvent(ui::MouseEvent* event) {
+  // Temp code to test animation.
+  if (event->type() == ui::ET_MOUSE_PRESSED) {
+    views::Widget* widget = GetWidget();
+    if (widget->IsVisible())
+      widget->Hide();
+  }
+}
+
+void HomeCardDelegateView::DeleteDelegate() {
+  delete this;
+}
+
+views::Widget* HomeCardDelegateView::GetWidget() {
+  return views::View::GetWidget();
+}
+
+const views::Widget* HomeCardDelegateView::GetWidget() const {
+  return views::View::GetWidget();
+}
+
+views::View* HomeCardDelegateView::GetContentsView() {
+  return this;
+}
+
+}  // namespace athena