Configure ink drops on menu bar buttons

atom/browser/ui/views/menu_bar.cc

@@ -63,7 +63,10 @@ void MenuBar::SetMenu(AtomMenuModel* model) {
   RemoveAllChildViews(true);
 
   for (int i = 0; i < model->GetItemCount(); ++i) {
-    SubmenuButton* button = new SubmenuButton(this, model->GetLabelAt(i), this);
+    SubmenuButton* button = new SubmenuButton(this,
+                                              model->GetLabelAt(i),
+                                              this,
+                                              background_color_);
     button->set_tag(i);
 
 #if defined(USE_X11)

atom/browser/ui/views/submenu_button.cc

@@ -7,7 +7,10 @@
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/gfx/canvas.h"
+#include "ui/gfx/color_utils.h"
 #include "ui/gfx/text_utils.h"
+#include "ui/views/animation/flood_fill_ink_drop_ripple.h"
+#include "ui/views/animation/ink_drop_host_view.h"
 #include "ui/views/controls/button/label_button_border.h"
 
 namespace atom {
@@ -25,7 +28,8 @@ base::string16 FilterAccelerator(const base::string16& label) {
 
 SubmenuButton::SubmenuButton(views::ButtonListener* listener,
                              const base::string16& title,
-                             views::MenuButtonListener* menu_button_listener)
+                             views::MenuButtonListener* menu_button_listener,
+                             const SkColor& background_color)
     : views::MenuButton(FilterAccelerator(title),
                         menu_button_listener, false),
       accelerator_(0),
@@ -34,7 +38,8 @@ SubmenuButton::SubmenuButton(views::ButtonListener* listener,
       underline_end_(-1),
       text_width_(0),
       text_height_(0),
-      underline_color_(SK_ColorBLACK) {
+      underline_color_(SK_ColorBLACK),
+      background_color_(background_color) {
 #if defined(OS_LINUX)
   // Dont' use native style border.
   SetBorder(std::move(CreateDefaultBorder()));
@@ -44,11 +49,41 @@ SubmenuButton::SubmenuButton(views::ButtonListener* listener,
                            &underline_end_))
     gfx::Canvas::SizeStringInt(GetText(), GetFontList(), &text_width_,
                                &text_height_, 0, 0);
+
+  SetHasInkDrop(true);
+  set_ink_drop_base_color(
+      color_utils::BlendTowardOppositeLuma(background_color_, 0x61));
 }
 
 SubmenuButton::~SubmenuButton() {
 }
 
+std::unique_ptr<views::InkDropRipple> SubmenuButton::CreateInkDropRipple()
+    const {
+  return base::MakeUnique<views::FloodFillInkDropRipple>(
+      GetLocalBounds(),
+      GetInkDropCenterBasedOnLastEvent(),
+      GetInkDropBaseColor(),
+      ink_drop_visible_opacity());
+}
+
+std::unique_ptr<views::InkDropHighlight>
+    SubmenuButton::CreateInkDropHighlight() const {
+  if (!ShouldShowInkDropHighlight())
+    return nullptr;
+
+  gfx::Size size = GetLocalBounds().size();
+  return base::MakeUnique<views::InkDropHighlight>(
+      size,
+      kInkDropSmallCornerRadius,
+      gfx::RectF(gfx::SizeF(size)).CenterPoint(),
+      GetInkDropBaseColor());
+}
+
+bool SubmenuButton::ShouldShowInkDropForFocus() const {
+  return false;
+}
+
 void SubmenuButton::SetAcceleratorVisibility(bool visible) {
   if (visible == show_underline_)
     return;

atom/browser/ui/views/submenu_button.h

@@ -5,6 +5,7 @@
 #ifndef ATOM_BROWSER_UI_VIEWS_SUBMENU_BUTTON_H_
 #define ATOM_BROWSER_UI_VIEWS_SUBMENU_BUTTON_H_
 
+#include "ui/views/animation/ink_drop_highlight.h"
 #include "ui/views/controls/button/menu_button.h"
 
 namespace atom {
@@ -14,7 +15,8 @@ class SubmenuButton : public views::MenuButton {
  public:
   SubmenuButton(views::ButtonListener* listener,
                 const base::string16& title,
-                views::MenuButtonListener* menu_button_listener);
+                views::MenuButtonListener* menu_button_listener,
+                const SkColor& background_color);
   virtual ~SubmenuButton();
 
   void SetAcceleratorVisibility(bool visible);
@@ -28,6 +30,12 @@ class SubmenuButton : public views::MenuButton {
   // views::MenuButton:
   void OnPaint(gfx::Canvas* canvas) override;
 
+  // views::InkDropHostView:
+  std::unique_ptr<views::InkDropRipple> CreateInkDropRipple() const override;
+  std::unique_ptr<views::InkDropHighlight> CreateInkDropHighlight()
+      const override;
+  bool ShouldShowInkDropForFocus() const override;
+
  private:
   bool GetUnderlinePosition(const base::string16& text,
                             base::char16* accelerator,
@@ -44,6 +52,7 @@ class SubmenuButton : public views::MenuButton {
   int text_width_;
   int text_height_;
   SkColor underline_color_;
+  SkColor background_color_;
 
   DISALLOW_COPY_AND_ASSIGN(SubmenuButton);
 };