Support prefix typing in Combobox while menu is open

ui/views/controls/menu/submenu_view.h

 // Copyright (c) 2012 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 UI_VIEWS_CONTROLS_MENU_SUBMENU_VIEW_H_
 #define UI_VIEWS_CONTROLS_MENU_SUBMENU_VIEW_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "ui/views/animation/scroll_animator.h"
 #include "ui/views/controls/menu/menu_delegate.h"
+#include "ui/views/controls/prefix_delegate.h"
+#include "ui/views/controls/prefix_selector.h"
 #include "ui/views/view.h"
 
 namespace views {
 
 class MenuHost;
 class MenuItemView;
 class MenuScrollViewContainer;
 
 // SubmenuView is the parent of all menu items.
 //
 // SubmenuView has the following responsibilities:
 // . It positions and sizes all child views (any type of View may be added,
 //   not just MenuItemViews).
 // . Forwards the appropriate events to the MenuController. This allows the
 //   MenuController to update the selection as the user moves the mouse around.
 // . Renders the drop indicator during a drop operation.
 // . Shows and hides the window (a NativeWidgetWin) when the menu is shown on
 //   screen.
 //
 // SubmenuView is itself contained in a MenuScrollViewContainer.
 // MenuScrollViewContainer handles showing as much of the SubmenuView as the
 // screen allows. If the SubmenuView is taller than the screen, scroll buttons
 // are provided that allow the user to see all the menu items.
-class VIEWS_EXPORT SubmenuView : public View,
+class VIEWS_EXPORT SubmenuView : public PrefixDelegate,
                                  public ScrollDelegate {
  public:
   // The submenu's class name.
   static const char kViewClassName[];
 
   // Creates a SubmenuView for the specified menu item.
   explicit SubmenuView(MenuItemView* parent);
   virtual ~SubmenuView();
 
   // Returns the number of child views that are MenuItemViews.
   // MenuItemViews are identified by ID.
   int GetMenuItemCount();
 
   // Returns the MenuItemView at the specified index.
   MenuItemView* GetMenuItemAt(int index);
 
   // Positions and sizes the child views. This tiles the views vertically,
   // giving each child the available width.
   virtual void Layout() OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
 
   // Override from View.
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
+  virtual ui::TextInputClient* GetTextInputClient() OVERRIDE;
 
   // Painting.
   virtual void PaintChildren(gfx::Canvas* canvas) OVERRIDE;
 
   // Drag and drop methods. These are forwarded to the MenuController.
   virtual bool GetDropFormats(
       int* formats,
       std::set<OSExchangeData::CustomFormat>* custom_formats) OVERRIDE;
   virtual bool AreDropTypesRequired() OVERRIDE;
   virtual bool CanDrop(const 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;
 
   // Scrolls on menu item boundaries.
   virtual bool OnMouseWheel(const ui::MouseWheelEvent& e) OVERRIDE;
 
   // Overridden from ui::EventHandler.
   // Scrolls on menu item boundaries.
   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
+  // Overridden from PrefixDelegate.
+  virtual int GetRowCount() OVERRIDE;
+  virtual int GetSelectedRow() OVERRIDE;
+  virtual void SetSelectedRow(int row) OVERRIDE;
+  virtual base::string16 GetTextForRow(int row) OVERRIDE;
+
   // Returns true if the menu is showing.
   bool IsShowing();
 
   // Shows the menu at the specified location. Coordinates are in screen
   // coordinates. max_width gives the max width the view should be.
   void ShowAt(Widget* parent, const gfx::Rect& bounds, bool do_capture);
 
   // Resets the bounds of the submenu to |bounds|.
   void Reposition(const gfx::Rect& bounds);
 
@@ skipping 109 matching lines @@
 
   // The submenu's scroll animator
   scoped_ptr<ScrollAnimator> scroll_animator_;
 
   // Difference between current position and cumulative deltas passed to
   // OnScroll.
   // TODO(tdresser): This should be removed when raw pixel scrolling for views
   // is enabled. See crbug.com/329354.
   float roundoff_error_;
 
+  PrefixSelector prefix_selector_;
+
   DISALLOW_COPY_AND_ASSIGN(SubmenuView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_SUBMENU_VIEW_H_