[cros] Network dropdown button in WebUI.

chrome/browser/ui/webui/chromeos/login/network_dropdown.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/webui/chromeos/login/network_dropdown.h"
+
+#include <string>
+
+#include "base/base64.h"
+#include "base/utf_string_conversions.h"
+#include "content/browser/webui/web_ui.h"
+#include "chrome/browser/chromeos/login/proxy_settings_dialog.h"
+#include "chrome/browser/chromeos/cros/cros_library.h"
+#include "chrome/browser/ui/webui/web_ui_util.h"
+#include "views/controls/menu/menu_delegate.h"
+#include "views/controls/menu/menu_item_view.h"
+#include "ui/gfx/font.h"
+
+namespace chromeos {
+
+// WebUI specific implementation of the views::MenuItemInterface class.
+class WebUIMenuItem : public views::MenuItemInterface {
+ public:
+  WebUIMenuItem(views::MenuDelegate* delegate, WebUI* web_ui);
+
+  virtual ~WebUIMenuItem();
+
+  base::ListValue* CreateValue();
+
+  // views::MenuItemInterface implementation:
+  virtual MenuItemInterface* AppendSubMenu(int item_id,
+                                           const std::wstring& label);
+  virtual MenuItemInterface* AppendSubMenuWithIcon(int item_id,
+                                                   const std::wstring& label,
+                                                   const SkBitmap& icon);
+  virtual MenuItemInterface* AppendMenuItemWithLabel(int item_id,
+                                                     const std::wstring& label);
+  virtual MenuItemInterface* AppendMenuItemWithIcon(int item_id,
+                                                    const std::wstring& label,
+                                                    const SkBitmap& icon);
+  virtual void AppendSeparator();
+  virtual void ClearSubmenu();
+  virtual void ChildrenChanged();
+  virtual void Cancel();
+  virtual void set_margins(int top_margin, int bottom_margin);
+
+ private:
+  WebUIMenuItem(const std::wstring& label,
+                int id,
+                const std::string& icon,
+                WebUIMenuItem* previous,
+                views::MenuDelegate *delegate);
+
+  views::MenuDelegate* delegate_;
+
+  // Item content. Icon is base64 encoded data URL.
+  int id_;
+  std::string icon_;
+  std::string label_;
+
+  // Points to the previous item in the same menu level or NULL.
+  WebUIMenuItem* previous_;
+  // Points to the last item in the sub-menu or NULL.
+  WebUIMenuItem* last_child_;
+
+  WebUI* web_ui_;
+};
+
+// WebUI specific implementation of the NetworkMenu class.
+class NetworkMenuWebUI : public NetworkMenu {
+ public:
+  NetworkMenuWebUI(NetworkMenu::Delegate* delegate, WebUI* web_ui)
+      : NetworkMenu(delegate, false, NULL) {
+    menu_item_.reset(new WebUIMenuItem(GetMenuDelegate(), web_ui));
+  }
+
+  void OnItemChosen(int id) {
+    GetMenuDelegate()->ExecuteCommand(id);
+  }
+};
+
+// WebUIMenuItem ---------------------------------------------------------------
+
+WebUIMenuItem::WebUIMenuItem(views::MenuDelegate* delegate, WebUI* web_ui)
+    : delegate_(delegate),
+      id_(-1),
+      previous_(NULL),
+      last_child_(NULL),
+      web_ui_(web_ui) {
+}
+
+WebUIMenuItem::~WebUIMenuItem() {
+  if (last_child_)
+    delete last_child_;

[xiyuan, 2011/07/29 21:39:33]

why not use scoped_ptr?

[Nikita (slow), 2011/08/05 23:40:26]

Done.

+  if (previous_)
+    delete previous_;

[xiyuan, 2011/07/29 21:39:33]

ditto

[Nikita (slow), 2011/08/05 23:40:26]

Done.

+}
+
+base::ListValue* WebUIMenuItem::CreateValue() {
+  base::DictionaryValue* item = new base::DictionaryValue();
+  item->SetInteger("id", id_);
+  item->SetString("label", label_);
+  item->SetString("icon", icon_);
+  if (id_ >= 0) {
+    item->SetBoolean("enabled", delegate_->IsCommandEnabled(id_));
+    item->SetBoolean(
+        "bold", delegate_->GetLabelFont(id_).GetStyle() == gfx::Font::BOLD);
+  }
+  if (last_child_) {
+    item->Set("sub", last_child_->CreateValue());
+  }
+
+  base::ListValue* list;
+  if (previous_) {
+    list = previous_->CreateValue();
+  } else {
+    list = new base::ListValue();
+  }
+
+  list->Append(item);
+
+  return list;
+}
+
+views::MenuItemInterface* WebUIMenuItem::AppendSubMenu(
+    int item_id, const std::wstring& label) {
+  return last_child_ =
+      new WebUIMenuItem(label, item_id, std::string(), last_child_, delegate_);
+}
+
+views::MenuItemInterface* WebUIMenuItem::AppendSubMenuWithIcon(
+    int item_id, const std::wstring& label, const SkBitmap& icon) {
+  return last_child_ = new WebUIMenuItem(label,
+                                         item_id,
+                                         web_ui_util::GetImageDataUrl(icon),
+                                         last_child_,
+                                         delegate_);
+}
+
+views::MenuItemInterface* WebUIMenuItem::AppendMenuItemWithLabel(
+    int item_id, const std::wstring& label) {
+  return last_child_ =
+      new WebUIMenuItem(label, item_id, std::string(), last_child_, delegate_);
+}
+
+views::MenuItemInterface* WebUIMenuItem::AppendMenuItemWithIcon(
+    int item_id, const std::wstring& label, const SkBitmap& icon) {
+  return last_child_ = new WebUIMenuItem(label,
+                                         item_id,
+                                         web_ui_util::GetImageDataUrl(icon),
+                                         last_child_,
+                                         delegate_);
+}
+
+void WebUIMenuItem::AppendSeparator() {
+  last_child_ = new WebUIMenuItem(UTF8ToWide("-----"), -2,
+                                  std::string(), last_child_,
+                                  delegate_);
+}
+
+void WebUIMenuItem::ClearSubmenu() {
+  if (last_child_)
+    delete last_child_;
+  last_child_ = NULL;
+}
+
+void WebUIMenuItem::ChildrenChanged() {
+  if (web_ui_) {
+    scoped_ptr<base::ListValue> data(CreateValue());
+    web_ui_->CallJavascriptFunction("oobe.NetworkScreen.updateNetworks", *data);
+  }
+}
+
+void WebUIMenuItem::Cancel() {
+}
+
+void WebUIMenuItem::set_margins(int top_margin, int bottom_margin) {
+}
+
+WebUIMenuItem::WebUIMenuItem(const std::wstring& label,
+                             int id,
+                             const std::string& icon,
+                             WebUIMenuItem* previous,
+                             views::MenuDelegate *delegate)
+    : delegate_(delegate),
+      id_(id),
+      icon_(icon),
+      label_(WideToUTF8(label)),
+      previous_(previous),
+      last_child_(NULL),
+      web_ui_(NULL) {
+}
+
+// NetworkDropdown -------------------------------------------------------------
+
+NetworkDropdown::NetworkDropdown(WebUI *web_ui, gfx::NativeWindow parent_window)
+    : parent_window_(parent_window),
+      web_ui_(web_ui) {
+  network_menu_.reset(new NetworkMenuWebUI(this, web_ui));
+  network_icon_.reset(
+      new NetworkMenuIcon(this, NetworkMenuIcon::DROPDOWN_MODE));
+  CrosLibrary::Get()->GetNetworkLibrary()->AddNetworkManagerObserver(this);
+
+  SetNetworkIconAndText();
+  network_menu_->UpdateMenu();
+}
+
+NetworkDropdown::~NetworkDropdown() {
+  CrosLibrary::Get()->GetNetworkLibrary()->RemoveNetworkManagerObserver(this);
+}
+
+void NetworkDropdown::OnItemChosen(int id) {
+  network_menu_->OnItemChosen(id);
+}
+
+views::MenuButton *NetworkDropdown::GetMenuButton() {
+  NOTREACHED();
+  return NULL;
+}
+
+gfx::NativeWindow NetworkDropdown::GetNativeWindow() const {
+  return parent_window_;
+}
+
+void NetworkDropdown::OpenButtonOptions() {
+  if (proxy_settings_dialog_.get() == NULL) {
+    proxy_settings_dialog_.reset(
+        new ProxySettingsDialog(this, GetNativeWindow()));
+  }
+  proxy_settings_dialog_->Show();
+}
+
+bool NetworkDropdown::ShouldOpenButtonOptions() const {
+  return true;
+}
+
+void NetworkDropdown::OnNetworkManagerChanged(NetworkLibrary* cros) {
+  SetNetworkIconAndText();
+  network_menu_->UpdateMenu();
+}
+
+void NetworkDropdown::OnDialogClosed() {
+}
+
+void NetworkDropdown::NetworkMenuIconChanged() {
+  // TODO(altimofeev): update icon.
+}
+
+void NetworkDropdown::SetNetworkIconAndText() {
+  string16 text;
+  const SkBitmap* icon_bitmap = network_icon_->GetIconAndText(&text);
+  std::string icon_str =
+      icon_bitmap ? web_ui_util::GetImageDataUrl(*icon_bitmap) : std::string();
+  base::StringValue title(text);
+  base::StringValue icon(icon_str);
+  web_ui_->CallJavascriptFunction("oobe.NetworkScreen.updateNetworkTitle",
+                                  title, icon);
+  // TODO(altimofeev): update icon.
+}
+
+}  // namespace chromeos