[Aura] A temp app list window.

chrome/browser/ui/views/aura/app_list_window.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 "chrome/browser/ui/views/aura/app_list_window.h"
+
+#include "base/bind.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/ui/views/dom_view.h"
+#include "content/browser/renderer_host/render_view_host.h"
+#include "content/browser/renderer_host/render_widget_host_view.h"
+#include "views/widget/widget.h"
+#include "ui/aura/desktop.h"
+#include "ui/gfx/screen.h"
+
+namespace {
+
+// Gets preferred bounds of app list window in show/hide state.
+gfx::Rect GetPreferredBounds(bool show) {
+  // The y-axis offset used at the beginning of showing animation.
+  static const int kMoveUpAnimationOffset = 50;
+
+  gfx::Point cursor = gfx::Screen::GetCursorScreenPoint();
+  gfx::Rect work_area = gfx::Screen::GetMonitorWorkAreaNearestPoint(cursor);
+  gfx::Rect widget_bounds(work_area);
+  widget_bounds.Inset(150, 100);
+  if (!show)
+    widget_bounds.Offset(0, kMoveUpAnimationOffset);
+
+  return widget_bounds;
+}
+
+}  // namespace
+
+// static
+AppListWindow* AppListWindow::instance_ = NULL;
+
+// static
+void AppListWindow::Show(bool show) {
+  if (!instance_) {
+    // TODO(xiyuan): Fix first time animation jankiness.
+    instance_ = new AppListWindow;
+    instance_->Init();
+  }
+
+  instance_->Show(show, true);
+}
+
+bool AppListWindow::IsShowing() {
+  return instance_ && instance_->is_showing();
+}
+
+AppListWindow::AppListWindow()
+    : widget_(NULL),
+      contents_(NULL),
+      is_showing_(false) {
+}
+
+AppListWindow::~AppListWindow() {
+}
+
+void AppListWindow::DeleteDelegate() {
+  delete this;
+}
+
+views::View* AppListWindow::GetContentsView() {
+  return contents_;
+}
+
+void AppListWindow::WindowClosing() {
+  aura::Desktop::GetInstance()->RemoveObserver(this);
+  widget_ = NULL;
+}
+
+views::Widget* AppListWindow::GetWidget() {
+  return widget_;
+}
+
+const views::Widget* AppListWindow::GetWidget() const {
+  return widget_;
+}
+
+void AppListWindow::OnActiveWindowChanged(aura::Window* active) {
+  if (widget_ && !widget_->IsActive() && is_showing_)
+    Show(false, true);
+}
+
+void AppListWindow::Init() {
+  DCHECK(!widget_ && !contents_);
+
+  contents_ = new DOMView();
+  contents_->Init(ProfileManager::GetDefaultProfile(), NULL);
+  contents_->LoadURL(GURL("chrome://newtab#applist"));
+
+  // Use a background with transparency to trigger transparent webkit.
+  SkBitmap background;
+  background.setConfig(SkBitmap::kARGB_8888_Config, 1, 1);
+  background.allocPixels();
+  background.eraseARGB(0x00, 0x00, 0x00, 0x00);
+
+  TabContents* tab = contents_->dom_contents()->tab_contents();
+  RenderViewHost* host = tab->render_view_host();
+  host->view()->SetBackground(background);
+
+  views::Widget::InitParams widget_params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  widget_params.bounds = GetPreferredBounds(false);
+  widget_params.delegate = this;
+
+  widget_ = new views::Widget;
+  widget_->Init(widget_params);
+  widget_->SetContentsView(contents_);
+  widget_->SetOpacity(0);
+
+  aura::Desktop::GetInstance()->AddObserver(this);
+}
+
+void AppListWindow::Show(bool show, bool animate) {
+  if (show == is_showing_)
+    return;
+
+  is_showing_ = show;
+
+  if (animate) {
+    gfx::Point dummy;
+    ui::Layer* layer;
+    widget_->CalculateOffsetToAncestorWithLayer(&dummy, &layer);
+
+    layer->SetAnimation(aura::Window::CreateDefaultAnimation());
+    layer->SetBounds(GetPreferredBounds(show));
+    layer->SetOpacity(show ? 1.0 : 0.0);
+  }
+
+  if (show) {
+    widget_->Activate();
+    widget_->Show();
+  } else {
+    instance_ = NULL;  // Closing and don't reuse this instance_.
+
+    if (animate) {
+      // TODO(xiyuan): Properly close widget after animation finishes.
+      MessageLoop::current()->PostDelayedTask(
+          FROM_HERE,
+          base::Bind(&views::Widget::Close, base::Unretained(widget_)),
+          1000);
+    } else {
+      widget_->Close();
+    }
+  }
+}