New AppListView Scroll Behavior.

ui/app_list/views/search_box_view.cc

 // 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.
 
 #include "ui/app_list/views/search_box_view.h"
 
 #include <algorithm>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ skipping 258 matching lines @@
   if (speech_button_)
     speech_button_->SetSelected(false);
 
   switch (focused_view_) {
     case FOCUS_BACK_BUTTON:
       focused_view_ = move_backwards ? FOCUS_BACK_BUTTON : FOCUS_SEARCH_BOX;
       break;
     case FOCUS_SEARCH_BOX:
       if (move_backwards) {
         focused_view_ = back_button_ && back_button_->visible()
-            ? FOCUS_BACK_BUTTON : FOCUS_SEARCH_BOX;
+                            ? FOCUS_BACK_BUTTON
+                            : FOCUS_SEARCH_BOX;
       } else {
         focused_view_ = speech_button_ && speech_button_->visible()
-            ? FOCUS_MIC_BUTTON : FOCUS_CONTENTS_VIEW;
+                            ? FOCUS_MIC_BUTTON
+                            : FOCUS_CONTENTS_VIEW;
       }
       break;
     case FOCUS_MIC_BUTTON:
       focused_view_ = move_backwards ? FOCUS_SEARCH_BOX : FOCUS_CONTENTS_VIEW;
       break;
     case FOCUS_CONTENTS_VIEW:
-      focused_view_ = move_backwards
-          ? (speech_button_ && speech_button_->visible() ?
-              FOCUS_MIC_BUTTON : FOCUS_SEARCH_BOX)
-          : FOCUS_CONTENTS_VIEW;
+      focused_view_ =
+          move_backwards
+              ? (speech_button_ && speech_button_->visible() ? FOCUS_MIC_BUTTON
+                                                             : FOCUS_SEARCH_BOX)
+              : FOCUS_CONTENTS_VIEW;
       break;
     default:
       DCHECK(false);
   }
 
   switch (focused_view_) {
     case FOCUS_BACK_BUTTON:
       if (back_button_)
         back_button_->SetSelected(true);
       break;
@@ skipping 41 matching lines @@
 
 void SearchBoxView::ShowBackOrGoogleIcon(bool show_back_button) {
   if (!is_fullscreen_app_list_enabled_)
     return;
 
   google_icon_->SetVisible(!show_back_button);
   back_button_->SetVisible(show_back_button);
   content_container_->Layout();
 }
 
+void SearchBoxView::OnMouseEvent(ui::MouseEvent* event) {
+  if (!is_fullscreen_app_list_enabled_)
+    return;
+
+  if (event->type() != ui::ET_MOUSEWHEEL)
+    return;
+
+  if (app_list_view_->HandleScroll(event))

[khmel, 2017/07/14 18:10:01]

nit:
  if (!app_list_view_->HandleScroll(event))
     return;

[newcomer, 2017/07/17 21:38:10]

Done.

+    event->SetHandled();
+}
+
 bool SearchBoxView::OnMouseWheel(const ui::MouseWheelEvent& event) {
   if (contents_view_)
     return contents_view_->OnMouseWheel(event);
-
   return false;
 }
 
 void SearchBoxView::OnEnabledChanged() {
   search_box_->SetEnabled(enabled());
   if (speech_button_)
     speech_button_->SetEnabled(enabled());
 }
 
 const char* SearchBoxView::GetClassName() const {
@@ skipping 66 matching lines @@
         speech_button_->OnKeyReleased(key_event))
       return true;
 
     return contents_view_ && contents_view_->visible() &&
            contents_view_->OnKeyReleased(key_event);
   }
 
   return false;
 }
 
+bool SearchBoxView::HandleMouseEvent(views::Textfield* sender,
+                                     const ui::MouseEvent& mouse_event) {
+  if (!is_fullscreen_app_list_enabled_)
+    return false;
+
+  if (mouse_event.type() != ui::ET_MOUSEWHEEL)
+    return false;
+
+  return app_list_view_->HandleScroll(&mouse_event);
+}
+
 void SearchBoxView::ButtonPressed(views::Button* sender,
                                   const ui::Event& event) {
   if (back_button_ && sender == back_button_)
     delegate_->BackButtonPressed();
   else if (speech_button_ && sender == speech_button_)
     view_delegate_->StartSpeechRecognition();
   else
     NOTREACHED();
 }
 
@@ skipping 94 matching lines @@
   SchedulePaint();
 }
 
 void SearchBoxView::OnSpeechRecognitionStateChanged(
     SpeechRecognitionState new_state) {
   SpeechRecognitionButtonPropChanged();
   SchedulePaint();
 }
 
 }  // namespace app_list