[Aura] Implement views-based applist.

ui/aura_shell/app_list/app_list_view.cc

+// Copyright (c) 2011 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 "ui/aura_shell/app_list/app_list_view.h"
+
+#include "ui/aura_shell/app_list/app_list_model.h"
+#include "ui/aura_shell/app_list/results_view.h"
+#include "ui/aura_shell/shell.h"
+#include "ui/views/layout/fill_layout.h"
+#include "ui/views/widget/widget.h"
+
+namespace aura_shell {
+
+AppListView::AppListView(
+    AppListModel* model,
+    const gfx::Rect& bounds,
+    const aura_shell::ShellDelegate::SetWidgetCallback& callback)
+    : model_(model),
+      results_view_(new ResultsView(model)) {
+  Init(bounds, callback);
+}
+
+AppListView::~AppListView() {
+}
+
+void AppListView::Close() {
+  if (GetWidget()->IsVisible())
+    Shell::GetInstance()->ToggleAppList();
+}
+
+void AppListView::Init(const gfx::Rect& bounds,
+                       const ShellDelegate::SetWidgetCallback& callback) {
+  SetLayoutManager(new views::FillLayout);
+  AddChildView(results_view_);
+
+  views::Widget::InitParams widget_params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  widget_params.bounds = bounds;
+  widget_params.delegate = this;
+  widget_params.keep_on_top = true;
+  widget_params.transparent = true;
+
+  views::Widget* widget = new views::Widget;
+  widget->Init(widget_params);
+  widget->SetContentsView(this);
+
+  callback.Run(widget);
+  if (results_view_->GetFocusedTile())
+    results_view_->GetFocusedTile()->RequestFocus();
+}
+
+bool AppListView::OnKeyPressed(const views::KeyEvent& event) {
+  if (event.key_code() == ui::VKEY_ESCAPE) {
+    Close();
+    return true;
+  }
+
+  return false;
+}
+
+bool AppListView::OnMousePressed(const views::MouseEvent& event) {
+  // If mouse click reaches us, this means user clicks on blank area. So close.
+  Close();
+
+  return true;
+}
+
+}  // namespace aura_shell