[WebPayments] Extracting common code from Shipping + Contact Info views.

chrome/browser/ui/views/payments/payment_request_item_list.h

 // Copyright 2017 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_PAYMENTS_PAYMENT_REQUEST_ITEM_LIST_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_ITEM_LIST_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
+#include "ui/views/controls/button/button.h"
 
 namespace views {
 class ImageView;
 class View;
 }
 
 namespace payments {
 
 class PaymentRequest;
 
 // A control representing a list of selectable items in the PaymentRequest
 // dialog. These lists enforce that only one of their elements be selectable at
 // a time and that "incomplete" items (for example, a credit card with no known
 // expiration date) behave differently when selected. Most of the time, this
 // behavior is to show an editor screen.
 class PaymentRequestItemList {
  public:
   // Represents an item in the item list.
-  class Item {
+  class Item : public views::ButtonListener {
    public:
     // Creates an item that will be owned by |list| with the initial state set
     // to |selected|.
     Item(PaymentRequest* request, PaymentRequestItemList* list, bool selected);
-    virtual ~Item();
+    ~Item() override;
 
     // Gets the view associated with this item. It's owned by this object so
     // that it can listen to any changes to the underlying model and update the
     // view.
     views::View* GetItemView();
 
     bool selected() const { return selected_; }
     // Changes the selected state of this item to |selected| and calls
     // SelectedStateChanged.
     void SetSelected(bool selected);
@@ skipping 13 matching lines @@
     // assume that they are the only selected item in |list| when this is
     // called. This could be called before CreateItemView so subclasses should
     // be aware that their views might not exist yet.
     virtual void SelectedStateChanged() = 0;
 
     // Creates an image of a large checkmark, used to indicate that an option is
     // selected.
     std::unique_ptr<views::ImageView> CreateCheckmark(bool selected);
 
    private:
+    // views::ButtonListener:
+    void ButtonPressed(views::Button* sender, const ui::Event& event) override {
+    }
+
     std::unique_ptr<views::View> item_view_;
     PaymentRequest* request_;
     PaymentRequestItemList* list_;
     bool selected_;
 
     DISALLOW_COPY_AND_ASSIGN(Item);
   };
 
   PaymentRequestItemList();
-  ~PaymentRequestItemList();
+  virtual ~PaymentRequestItemList();
 
   // Adds an item to this list. |item->list()| should return this object.
   void AddItem(std::unique_ptr<Item> item);
 
   // Creates and returns the UI representation of this list. It iterates over
   // the items it contains, creates their associated views, and adds them to the
   // hierarchy.
   std::unique_ptr<views::View> CreateListView();
 
   // Deselects the currently selected item and selects |item| instead.
   void SelectItem(Item* item);
 
  private:
   // Unselects the currently selected item. This is private so that the list can
   // use it when selecting a new item while avoiding consumers of this class
   // putting the list in a state where no item is selected.
   void UnselectSelectedItem();
 
   std::vector<std::unique_ptr<Item>> items_;
   Item* selected_item_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestItemList);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_ITEM_LIST_H_