[Web Payments] Add Cancel button to all sheets

chrome/browser/ui/views/payments/payment_request_sheet_controller.cc

+// 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.
+
+#include "chrome/browser/ui/views/payments/payment_request_sheet_controller.h"
+
+#include "chrome/browser/ui/views/payments/payment_request_dialog_view.h"
+#include "chrome/browser/ui/views/payments/payment_request_views_util.h"
+#include "components/strings/grit/components_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/views/background.h"
+#include "ui/views/controls/button/md_text_button.h"
+#include "ui/views/layout/box_layout.h"
+#include "ui/views/layout/grid_layout.h"
+
+
+namespace payments {
+
+PaymentRequestSheetController::PaymentRequestSheetController(
+    PaymentRequest* request, PaymentRequestDialogView* dialog)
+  : request_(request), dialog_(dialog) {
+  DCHECK(request_);
+  DCHECK(dialog_);
+}
+
+std::unique_ptr<views::Button>
+PaymentRequestSheetController::CreatePrimaryButton() {
+  return nullptr;
+}
+
+void PaymentRequestSheetController::ButtonPressed(
+    views::Button* sender, const ui::Event& event) {
+  switch (static_cast<PaymentRequestCommonTags>(sender->tag())) {
+    case PaymentRequestCommonTags::CLOSE_BUTTON_TAG:
+      dialog()->CloseDialog();

[Mathieu, 2017/02/06 17:24:53]

I think for most screens, the desired behavior of the "Cancel" button should be
to GoBack() (until you are at the root, at which point you close). You may want
to double check that with UX

+      break;
+    case PaymentRequestCommonTags::BACK_BUTTON_TAG:
+      dialog()->GoBack();
+      break;
+    case PaymentRequestCommonTags::PAYMENT_REQUEST_COMMON_TAG_MAX:
+      NOTREACHED();
+      break;
+  }
+}
+
+std::unique_ptr<views::View> PaymentRequestSheetController::CreatePaymentView(
+    std::unique_ptr<views::View> header_view,
+    std::unique_ptr<views::View> content_view) {
+  std::unique_ptr<views::View> view = base::MakeUnique<views::View>();
+  view->set_background(views::Background::CreateSolidBackground(SK_ColorWHITE));
+
+  // Paint the sheets to layers, otherwise the MD buttons (which do paint to a
+  // layer) won't do proper clipping.
+  view->SetPaintToLayer();
+
+  views::GridLayout* layout = new views::GridLayout(view.get());
+  view->SetLayoutManager(layout);
+
+  constexpr int kTopInsetSize = 9;
+  constexpr int kBottomInsetSize = 18;
+  layout->SetInsets(kTopInsetSize, 0, kBottomInsetSize, 0);
+  views::ColumnSet* columns = layout->AddColumnSet(0);
+  columns->AddColumn(views::GridLayout::FILL, views::GridLayout::CENTER,
+                     1, views::GridLayout::USE_PREF, 0, 0);
+
+  layout->StartRow(0, 0);
+  // |header_view| will be deleted when |view| is.
+  layout->AddView(header_view.release());
+
+  layout->StartRow(0, 0);
+  // |content_view| will be deleted when |view| is.
+  layout->AddView(content_view.release());
+
+  layout->AddPaddingRow(1, 0);
+  layout->StartRow(0, 0);
+  layout->AddView(CreateFooterView().release());
+
+  return view;
+}
+
+std::unique_ptr<views::View> PaymentRequestSheetController::CreateFooterView() {
+  std::unique_ptr<views::View> container = base::MakeUnique<views::View>();
+
+  views::GridLayout* layout = new views::GridLayout(container.get());
+  container->SetLayoutManager(layout);
+
+  views::ColumnSet* columns = layout->AddColumnSet(0);
+  columns->AddColumn(views::GridLayout::LEADING, views::GridLayout::CENTER,
+                     0, views::GridLayout::USE_PREF, 0, 0);
+  columns->AddPaddingColumn(1, 0);
+  columns->AddColumn(views::GridLayout::TRAILING, views::GridLayout::CENTER,
+                     0, views::GridLayout::USE_PREF, 0, 0);
+
+  layout->StartRow(0, 0);
+  std::unique_ptr<views::View> leading_buttons_container =
+      base::MakeUnique<views::View>();
+
+  // TODO(anthonyvd): Add the other buttons that can eventually go into this
+  // footer.
+
+  layout->AddView(leading_buttons_container.release());
+
+  std::unique_ptr<views::View> trailing_buttons_container =
+      base::MakeUnique<views::View>();
+
+  constexpr int kButtonSpacing = 10;
+  trailing_buttons_container->SetLayoutManager(new views::BoxLayout(
+      views::BoxLayout::kHorizontal,
+      kPaymentRequestRowHorizontalInsets,
+      kPaymentRequestRowVerticalInsets,
+      kButtonSpacing));
+
+  std::unique_ptr<views::Button> primary_button = CreatePrimaryButton();
+  if (primary_button)
+    trailing_buttons_container->AddChildView(primary_button.release());
+
+  views::LabelButton* button = views::MdTextButton::CreateSecondaryUiButton(
+      this, l10n_util::GetStringUTF16(IDS_CANCEL));
+  button->set_tag(static_cast<int>(PaymentRequestCommonTags::CLOSE_BUTTON_TAG));
+  trailing_buttons_container->AddChildView(button);
+
+  layout->AddView(trailing_buttons_container.release());
+
+  return container;
+}
+
+}  // namespace payments