Positions the launcher in the bottom left corner. Adds ShellDelegate

ui/aura_shell/launcher/launcher.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/launcher/launcher.h"
+
+#include "ui/aura/toplevel_window_container.h"
+#include "ui/aura_shell/launcher/launcher_model.h"
+#include "ui/aura_shell/launcher/launcher_view.h"
+#include "ui/aura_shell/shell.h"
+#include "ui/aura_shell/shell_delegate.h"
+#include "ui/aura_shell/shell_window_ids.h"
+#include "ui/gfx/compositor/layer.h"
+#include "views/widget/widget.h"
+
+namespace aura_shell {
+
+Launcher::Launcher(aura::ToplevelWindowContainer* window_container)
+    : window_container_(window_container),
+      widget_(NULL) {
+  window_container->AddObserver(this);
+
+  model_.reset(new LauncherModel);
+
+  widget_ = new views::Widget;
+  views::Widget::InitParams params(views::Widget::InitParams::TYPE_CONTROL);
+  params.parent = Shell::GetInstance()->GetContainer(
+      aura_shell::internal::kShellWindowId_LauncherContainer);
+  internal::LauncherView* launcher_view =
+      new internal::LauncherView(model_.get());
+  launcher_view->Init();
+  params.delegate = launcher_view;
+  widget_->Init(params);
+  widget_->GetNativeWindow()->layer()->SetOpacity(0.8f);
+  gfx::Size pref = static_cast<views::View*>(launcher_view)->GetPreferredSize();
+  widget_->SetBounds(gfx::Rect(0, 0, pref.width(), pref.height()));
+  widget_->SetContentsView(launcher_view);
+  widget_->Show();
+  widget_->GetNativeView()->set_name("LauncherView");
+}
+
+Launcher::~Launcher() {
+  window_container_->RemoveObserver(this);
+}
+
+void Launcher::OnWindowAdded(aura::Window* new_window) {
+  ShellDelegate* delegate = Shell::GetInstance()->delegate();
+  if (!delegate)
+    return;
+  LauncherItem item;
+  item.window = new_window;
+  if (!delegate->ConfigureLauncherItem(&item))
+    return;  // The delegate doesn't want to show this item in the launcher.
+  model_->Add(model_->items().size(), item);
+}
+
+void Launcher::OnWillRemoveWindow(aura::Window* window) {
+  const LauncherItems& items(model_->items());
+  for (LauncherItems::const_iterator i = items.begin(); i != items.end(); ++i) {
+    if (i->window == window) {
+      model_->RemoveItemAt(i - items.begin());
+      break;
+    }
+  }
+}
+
+}  // namespace aura_shell