Make the chevron menu button responsible for legacy overflow menu logic

chrome/browser/ui/views/toolbar/chevron_menu_button.h

+// 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.
+
+#ifndef CHROME_BROWSER_UI_VIEWS_TOOLBAR_CHEVRON_MENU_BUTTON_H_
+#define CHROME_BROWSER_UI_VIEWS_TOOLBAR_CHEVRON_MENU_BUTTON_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "ui/views/controls/button/menu_button.h"
+#include "ui/views/controls/button/menu_button_listener.h"
+
+class BrowserActionsContainer;
+
+// The MenuButton for the chevron in the extension toolbar, which is also
+// responsible for showing the legacy (drop-down) overflow menu.
+class ChevronMenuButton : public views::MenuButton,
+                          public views::MenuButtonListener {
+ public:
+  explicit ChevronMenuButton(
+      BrowserActionsContainer* browser_actions_container);
+  virtual ~ChevronMenuButton();
+
+  // Closes the overflow menu (and any context menu), if it is open.
+  void CloseMenu();
+
+ private:
+  class MenuController;
+
+  // views::MenuButton:
+  virtual scoped_ptr<views::LabelButtonBorder> CreateDefaultBorder() const
+      OVERRIDE;
+  virtual bool GetDropFormats(int* formats,
+      std::set<ui::OSExchangeData::CustomFormat>* custom_formats) OVERRIDE;
+  virtual bool AreDropTypesRequired() OVERRIDE;
+  virtual bool CanDrop(const ui::OSExchangeData& data) OVERRIDE;
+  virtual void OnDragEntered(const ui::DropTargetEvent& event) OVERRIDE;
+  virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
+  virtual void OnDragExited() OVERRIDE;
+  virtual int OnPerformDrop(const ui::DropTargetEvent& event) OVERRIDE;
+
+  // views::MenuButtonListener:
+  virtual void OnMenuButtonClicked(View* source, const gfx::Point& point)
+      OVERRIDE;
+
+  // Shows the overflow menu.
+  void ShowOverflowMenu(bool for_drop);
+
+  // Called by the overflow menu when all the work is done.
+  void MenuDone();
+
+  // The owning BrowserActionsContainer.
+  BrowserActionsContainer* browser_actions_container_;
+
+  // The overflow menu controller.
+  scoped_ptr<MenuController> menu_controller_;
+
+  base::WeakPtrFactory<ChevronMenuButton> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChevronMenuButton);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_CHEVRON_MENU_BUTTON_H_