Add MD ink drop ripple to app list button

ash/shelf/app_list_button.cc

 // 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.
 
 #include "ash/shelf/app_list_button.h"
 
 #include "ash/common/ash_constants.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/shelf_item_types.h"
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/common/shelf/wm_shelf_util.h"
 #include "ash/shelf/ink_drop_button_listener.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_view.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/app_list/app_list_switches.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_switches_util.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/gfx/vector_icons_public.h"
+#include "ui/views/animation/square_ink_drop_ripple.h"
 #include "ui/views/painter.h"
 
 namespace ash {
 
 AppListButton::AppListButton(InkDropButtonListener* listener,
                              ShelfView* shelf_view)
     : views::ImageButton(nullptr),
       draw_background_as_active_(false),
       listener_(listener),
       shelf_view_(shelf_view) {
+  if (ash::MaterialDesignController::IsShelfMaterial()) {
+    SetInkDropMode(InkDropMode::ON_NO_GESTURE_HANDLER);
+    set_ink_drop_base_color(kShelfInkDropBaseColor);
+    set_ink_drop_visible_opacity(kShelfInkDropVisibleOpacity);
+  }
   SetAccessibleName(
       app_list::switches::IsExperimentalAppListEnabled()
           ? l10n_util::GetStringUTF16(IDS_ASH_SHELF_APP_LIST_LAUNCHER_TITLE)
           : l10n_util::GetStringUTF16(IDS_ASH_SHELF_APP_LIST_TITLE));
   SetSize(
       gfx::Size(GetShelfConstant(SHELF_SIZE), GetShelfConstant(SHELF_SIZE)));
   SetFocusPainter(views::Painter::CreateSolidFocusPainter(
       kFocusBorderColor, gfx::Insets(1, 1, 1, 1)));
   set_notify_action(CustomButton::NOTIFY_ON_PRESS);
 }
 
 AppListButton::~AppListButton() {}
 
+void AppListButton::OnAppListShown() {
+  AnimateInkDrop(views::InkDropState::ACTIVATED, nullptr);
+}
+
+void AppListButton::OnAppListDismissed() {
+  AnimateInkDrop(views::InkDropState::DEACTIVATED, nullptr);
+}
+
 bool AppListButton::OnMousePressed(const ui::MouseEvent& event) {
   ImageButton::OnMousePressed(event);
   shelf_view_->PointerPressedOnButton(this, ShelfView::MOUSE, event);
   return true;
 }
 
 void AppListButton::OnMouseReleased(const ui::MouseEvent& event) {
   ImageButton::OnMouseReleased(event);
   shelf_view_->PointerReleasedOnButton(this, ShelfView::MOUSE, false);
 }
 
 void AppListButton::OnMouseCaptureLost() {
   shelf_view_->PointerReleasedOnButton(this, ShelfView::MOUSE, true);
   ImageButton::OnMouseCaptureLost();
 }
 
 bool AppListButton::OnMouseDragged(const ui::MouseEvent& event) {
   ImageButton::OnMouseDragged(event);
   shelf_view_->PointerDraggedOnButton(this, ShelfView::MOUSE, event);
   return true;
 }
 
 void AppListButton::OnGestureEvent(ui::GestureEvent* event) {
+  const bool is_material = ash::MaterialDesignController::IsShelfMaterial();
+  const bool touch_feedback =
+      !is_material && switches::IsTouchFeedbackEnabled();
   switch (event->type()) {
     case ui::ET_GESTURE_SCROLL_BEGIN:
-      if (switches::IsTouchFeedbackEnabled())
+      if (touch_feedback)
         SetDrawBackgroundAsActive(false);
+      else if (is_material)
+        AnimateInkDrop(views::InkDropState::HIDDEN, event);
       shelf_view_->PointerPressedOnButton(this, ShelfView::TOUCH, *event);
       event->SetHandled();
       return;
     case ui::ET_GESTURE_SCROLL_UPDATE:
       shelf_view_->PointerDraggedOnButton(this, ShelfView::TOUCH, *event);
       event->SetHandled();
       return;
     case ui::ET_GESTURE_SCROLL_END:
     case ui::ET_SCROLL_FLING_START:
       shelf_view_->PointerReleasedOnButton(this, ShelfView::TOUCH, false);
       event->SetHandled();
       return;
     case ui::ET_GESTURE_TAP_DOWN:
-      if (switches::IsTouchFeedbackEnabled())
+      if (touch_feedback)
         SetDrawBackgroundAsActive(true);
+      else if (is_material && !Shell::GetInstance()->IsApplistVisible())
+        AnimateInkDrop(views::InkDropState::ACTION_PENDING, event);
       ImageButton::OnGestureEvent(event);
       break;
     case ui::ET_GESTURE_TAP_CANCEL:
     case ui::ET_GESTURE_TAP:
-      if (switches::IsTouchFeedbackEnabled())
+      if (touch_feedback)
         SetDrawBackgroundAsActive(false);
       ImageButton::OnGestureEvent(event);
       break;
     default:
       ImageButton::OnGestureEvent(event);
       return;
   }
 }
 
 void AppListButton::OnPaint(gfx::Canvas* canvas) {
@@ skipping 27 matching lines @@
       shelf_widget->GetBackgroundType() ==
           ShelfBackgroundType::SHELF_BACKGROUND_DEFAULT) {
     background_paint.setColor(
         SkColorSetA(kShelfBaseColor, GetShelfConstant(SHELF_BACKGROUND_ALPHA)));
   }
 
   // Paint the circular background of AppList button.
   gfx::Point circle_center = GetContentsBounds().CenterPoint();
   if (!IsHorizontalAlignment(shelf_view_->shelf()->alignment()))
     circle_center = gfx::Point(circle_center.y(), circle_center.x());
+
   canvas->DrawCircle(circle_center, kAppListButtonRadius, background_paint);
-
-  if (Shell::GetInstance()->GetAppListTargetVisibility() ||
-      draw_background_as_active_) {
-    SkPaint highlight_paint;
-    highlight_paint.setColor(kShelfButtonActivatedHighlightColor);
-    highlight_paint.setFlags(SkPaint::kAntiAlias_Flag);
-    highlight_paint.setStyle(SkPaint::kFill_Style);
-    canvas->DrawCircle(circle_center, kAppListButtonRadius, highlight_paint);
-  }
 }
 
 void AppListButton::PaintForegroundMD(gfx::Canvas* canvas,
                                       const gfx::ImageSkia& foreground_image) {
   gfx::Rect foreground_bounds(foreground_image.size());
   gfx::Rect contents_bounds = GetContentsBounds();
 
   if (IsHorizontalAlignment(shelf_view_->shelf()->alignment())) {
     foreground_bounds.set_x(
         (contents_bounds.width() - foreground_bounds.width()) / 2);
@@ skipping 61 matching lines @@
                (background_bounds.height() - foreground_bounds.height()) / 2));
   canvas->DrawImageInt(foreground_image, foreground_bounds.x(),
                        foreground_bounds.y());
 }
 
 void AppListButton::GetAccessibleState(ui::AXViewState* state) {
   state->role = ui::AX_ROLE_BUTTON;
   state->name = shelf_view_->GetTitleForView(this);
 }
 
+std::unique_ptr<views::InkDropRipple> AppListButton::CreateInkDropRipple()
+    const {
+  // TODO(mohsen): A circular SquareInkDropRipple is created with equal small
+  // and large sizes to mimic a circular flood fill. Replace with an actual
+  // flood fill when circular flood fills are implemented.
+  gfx::Size ripple_size(2 * kAppListButtonRadius, 2 * kAppListButtonRadius);
+  auto ink_drop_ripple = new views::SquareInkDropRipple(
+      ripple_size, 0, ripple_size, 0, GetContentsBounds().CenterPoint(),
+      GetInkDropBaseColor(), ink_drop_visible_opacity());
+  ink_drop_ripple->set_activated_shape(views::SquareInkDropRipple::CIRCLE);
+  return base::WrapUnique(ink_drop_ripple);
+}
+
 void AppListButton::NotifyClick(const ui::Event& event) {
   ImageButton::NotifyClick(event);
   if (listener_)
     listener_->ButtonPressed(this, event, ink_drop());
 }
 
+bool AppListButton::ShouldEnterPushedState(const ui::Event& event) {
+  return !Shell::GetInstance()->IsApplistVisible();
+}
+
+bool AppListButton::ShouldShowInkDropHighlight() const {
+  return false;
+}
+
 void AppListButton::SetDrawBackgroundAsActive(bool draw_background_as_active) {
   if (draw_background_as_active_ == draw_background_as_active)
     return;
   draw_background_as_active_ = draw_background_as_active;
   SchedulePaint();
 }
 
 }  // namespace ash