Remove TransparentActivateWindowButton from Overview Mode

ash/wm/overview/window_selector_item.cc

 // Copyright 2013 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/wm/overview/window_selector_item.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/overview/overview_animation_type.h"
+#include "ash/wm/overview/overview_window_targeter.h"
 #include "ash/wm/overview/scoped_overview_animation_settings.h"
 #include "ash/wm/overview/scoped_transform_overview_window.h"
 #include "ash/wm/overview/window_selector_controller.h"
 #include "ash/wm/window_state.h"
 #include "base/auto_reset.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/aura/window.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/geometry/vector2d.h"
 #include "ui/gfx/transform_util.h"
 #include "ui/strings/grit/ui_strings.h"
+#include "ui/views/border.h"
 #include "ui/views/controls/button/image_button.h"
-#include "ui/views/controls/label.h"
 #include "ui/views/layout/box_layout.h"
 #include "ui/views/widget/widget.h"
 #include "ui/wm/core/window_util.h"
 
 namespace ash {
 
 namespace {
 
 // In the conceptual overview table, the window margin is the space reserved
 // around the window within the cell. This margin does not overlap so the
 // closest distance between adjacent windows will be twice this amount.
 static const int kWindowMargin = 30;
 
 // Foreground label color.
 static const SkColor kLabelColor = SK_ColorWHITE;
 
-// Background label color.
-static const SkColor kLabelBackground = SK_ColorTRANSPARENT;
-
 // Label shadow color.
 static const SkColor kLabelShadow = 0xB0000000;
 
-// Vertical padding for the label, both over and beneath it.
-static const int kVerticalLabelPadding = 20;
-
 // Solid shadow length from the label
 static const int kVerticalShadowOffset = 1;
 
 // Amount of blur applied to the label shadow
 static const int kShadowBlur = 10;
 
 // Opacity for dimmed items.
 static const float kDimmedItemOpacity = 0.5f;
 
 // Calculates the |window| bounds after being transformed to the selector's
@@ skipping 39 matching lines @@
            rb.GetImageSkiaNamed(IDR_AURA_WINDOW_OVERVIEW_CLOSE_H));
   SetImage(views::CustomButton::STATE_PRESSED,
            rb.GetImageSkiaNamed(IDR_AURA_WINDOW_OVERVIEW_CLOSE_P));
 }
 
 OverviewCloseButton::~OverviewCloseButton() {
 }
 
 }  // namespace
 
+// LabelButton shown under each of the windows.
+// The button is activated as soon as the mouse is pressed to avoid relying on
+// the mouse up to target this view.

[tdanderson, 2015/01/22 20:43:58]

Since you're activating on mouse release (the current behavior) then this
comment is out of date.

[Nina, 2015/01/22 22:25:39]

Done.

+class WindowSelectorItem::OverviewLabelButton : public views::LabelButton {
+ public:
+  OverviewLabelButton(views::ButtonListener* listener,
+                      const base::string16& text)
+      : views::LabelButton(listener, text), event_bounds_(gfx::Rect()) {}
+
+  ~OverviewLabelButton() override {}
+
+  // Updates the |event_bounds|, converting them to our coordinates.

[tdanderson, 2015/01/22 20:43:58]

|event_bounds_|. 

[Nina, 2015/01/22 22:25:39]

Done.

+  void SetEventBounds(const gfx::Rect& event_bounds) {
+    event_bounds_ = ScreenUtil::ConvertRectFromScreen(
+        GetWidget()->GetNativeWindow()->GetRootWindow(), event_bounds);
+    gfx::Point origin = event_bounds_.origin();
+    gfx::Rect target_bounds = GetWidget()->GetNativeWindow()->GetTargetBounds();
+    origin.Offset(-target_bounds.x(), -target_bounds.y());
+    event_bounds_.set_origin(origin);
+  }
+
+  // views::View:
+  void OnMouseReleased(const ui::MouseEvent& event) override {
+    if (!event_bounds_.Contains(event.location()))
+      return;
+
+    NotifyClick(event);
+  }
+
+ private:
+  // Bounds to check if a mouse release occurred outside the window item.
+  gfx::Rect event_bounds_;

[tdanderson, 2015/01/22 20:43:58]

It's not immediately clear what "event bounds" means. I would rename this (and
SetEventBounds()) to something such as "selector item bounds" to make it
clearer.

[Nina, 2015/01/22 22:25:39]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(OverviewLabelButton);
+};
+
 WindowSelectorItem::WindowSelectorItem(aura::Window* window)
     : dimmed_(false),
       root_window_(window->GetRootWindow()),
       transform_window_(window),
       in_bounds_update_(false),
-      window_label_view_(nullptr),
+      window_label_button_view_(nullptr),
       close_button_(new OverviewCloseButton(this)),
-      selector_item_activate_window_button_(
-          new TransparentActivateWindowButton(root_window_, this)) {
+      overview_window_targeter_(nullptr),
+      scoped_window_targeter_(nullptr) {
   views::Widget::InitParams params;
   params.type = views::Widget::InitParams::TYPE_POPUP;
   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
   params.parent = Shell::GetContainer(root_window_,
                                       kShellWindowId_OverlayContainer);
   close_button_widget_.set_focus_on_creation(false);
   close_button_widget_.Init(params);
   close_button_->SetVisible(false);
   close_button_widget_.SetContentsView(close_button_);
   close_button_widget_.SetSize(close_button_->GetPreferredSize());
   close_button_widget_.Show();
 
   gfx::Rect close_button_rect(close_button_widget_.GetNativeWindow()->bounds());
   // Align the center of the button with position (0, 0) so that the
   // translate transform does not need to take the button dimensions into
   // account.
   close_button_rect.set_x(-close_button_rect.width() / 2);
   close_button_rect.set_y(-close_button_rect.height() / 2);
   close_button_widget_.GetNativeWindow()->SetBounds(close_button_rect);
 
   GetWindow()->AddObserver(this);
+  CreateWindowLabel();
 
   UpdateCloseButtonAccessibilityName();
+
+  overview_window_targeter_ =
+      new OverviewWindowTargeter(window_label_->GetNativeWindow());
+  scoped_window_targeter_.reset(new aura::ScopedWindowTargeter(
+      window, scoped_ptr<OverviewWindowTargeter>(overview_window_targeter_)));
 }
 
 WindowSelectorItem::~WindowSelectorItem() {
   GetWindow()->RemoveObserver(this);
 }
 
 aura::Window* WindowSelectorItem::GetWindow() {
   return transform_window_.window();
 }
 
@@ skipping 22 matching lines @@
 
   UpdateWindowLabels(target_bounds, animation_type);
 
   gfx::Rect inset_bounds(target_bounds);
   inset_bounds.Inset(kWindowMargin, kWindowMargin);
   SetItemBounds(inset_bounds, animation_type);
 
   // SetItemBounds is called before UpdateCloseButtonLayout so the close button
   // can properly use the updated windows bounds.
   UpdateCloseButtonLayout(animation_type);
-  UpdateSelectorButtons();
 }
 
 void WindowSelectorItem::RecomputeWindowTransforms() {
   if (in_bounds_update_ || target_bounds_.IsEmpty())
     return;
   base::AutoReset<bool> auto_reset_in_bounds_update(&in_bounds_update_, true);
   gfx::Rect inset_bounds(target_bounds_);
   inset_bounds.Inset(kWindowMargin, kWindowMargin);
   SetItemBounds(inset_bounds, OverviewAnimationType::OVERVIEW_ANIMATION_NONE);
-
   UpdateCloseButtonLayout(OverviewAnimationType::OVERVIEW_ANIMATION_NONE);
-  UpdateSelectorButtons();
 }
 
 void WindowSelectorItem::SendFocusAlert() const {
-  selector_item_activate_window_button_->SendFocusAlert();
+  window_label_button_view_->NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
 }
 
 void WindowSelectorItem::SetDimmed(bool dimmed) {
   dimmed_ = dimmed;
   SetOpacity(dimmed ? kDimmedItemOpacity : 1.0f);
 }
 
 void WindowSelectorItem::ButtonPressed(views::Button* sender,
                                        const ui::Event& event) {
-  transform_window_.Close();
+  if (sender == close_button_) {
+    transform_window_.Close();
+    return;
+  }
+  DCHECK(sender == window_label_button_view_);
+  wm::GetWindowState(GetWindow())->Activate();
 }
 
 void WindowSelectorItem::OnWindowDestroying(aura::Window* window) {
   window->RemoveObserver(this);
   transform_window_.OnWindowDestroyed();
 }
 
 void WindowSelectorItem::OnWindowTitleChanged(aura::Window* window) {
   // TODO(flackr): Maybe add the new title to a vector of titles so that we can
   // filter any of the titles the window had while in the overview session.
-  if (window == GetWindow()) {
-    window_label_view_->SetText(window->title());
-    UpdateCloseButtonAccessibilityName();
-  }
-  UpdateCloseButtonLayout(OverviewAnimationType::OVERVIEW_ANIMATION_NONE);
-  UpdateSelectorButtons();
-}
-
-void WindowSelectorItem::Select() {
-  aura::Window* selection_window = GetWindow();
-  if (selection_window)
-    wm::GetWindowState(selection_window)->Activate();
+  window_label_button_view_->SetText(window->title());
+  UpdateCloseButtonAccessibilityName();
 }
 
 void WindowSelectorItem::SetItemBounds(const gfx::Rect& target_bounds,
                                        OverviewAnimationType animation_type) {
   DCHECK(root_window_ == GetWindow()->GetRootWindow());
   gfx::Rect screen_bounds = transform_window_.GetTargetBoundsInScreen();
   gfx::Rect selector_item_bounds =
       ScopedTransformOverviewWindow::ShrinkRectToFitPreservingAspectRatio(
           screen_bounds, target_bounds);
   gfx::Transform transform =
       ScopedTransformOverviewWindow::GetTransformForRect(screen_bounds,
           selector_item_bounds);
   ScopedTransformOverviewWindow::ScopedAnimationSettings animation_settings;
   transform_window_.BeginScopedAnimation(animation_type, &animation_settings);
   transform_window_.SetTransform(root_window_, transform);
   transform_window_.set_overview_transform(transform);
+  overview_window_targeter_->set_bounds(
+      ScreenUtil::ConvertRectFromScreen(root_window_, target_bounds));
 }
 
 void WindowSelectorItem::SetOpacity(float opacity) {
   window_label_->GetNativeWindow()->layer()->SetOpacity(opacity);
   close_button_widget_.GetNativeWindow()->layer()->SetOpacity(opacity);
 
   transform_window_.SetOpacity(opacity);
 }
 
 void WindowSelectorItem::UpdateWindowLabels(
     const gfx::Rect& window_bounds,
     OverviewAnimationType animation_type) {
-
-  if (!window_label_) {
-    CreateWindowLabel(GetWindow()->title());
+  if (!window_label_->IsVisible()) {
+    window_label_->Show();
     SetupFadeInAfterLayout(window_label_->GetNativeWindow());
   }
-
   gfx::Rect converted_bounds = ScreenUtil::ConvertRectFromScreen(root_window_,
                                                                  window_bounds);
   gfx::Rect label_bounds(converted_bounds.x(),
                          converted_bounds.bottom(),
                          converted_bounds.width(),
                          0);
   label_bounds.set_height(window_label_->GetContentsView()->
                               GetPreferredSize().height());
   label_bounds.set_y(label_bounds.y() - window_label_->
                          GetContentsView()->GetPreferredSize().height());
 
   ScopedOverviewAnimationSettings animation_settings(animation_type,
       window_label_->GetNativeWindow());
 
   window_label_->GetNativeWindow()->SetBounds(label_bounds);
+  window_label_button_view_->SetEventBounds(target_bounds_);
 }
 
-void WindowSelectorItem::CreateWindowLabel(const base::string16& title) {
+void WindowSelectorItem::CreateWindowLabel() {
   window_label_.reset(new views::Widget);
   views::Widget::InitParams params;
   params.type = views::Widget::InitParams::TYPE_POPUP;
   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
   params.parent = Shell::GetContainer(root_window_,
                                       kShellWindowId_OverlayContainer);
-  params.accept_events = false;
   params.visible_on_all_workspaces = true;
   window_label_->set_focus_on_creation(false);
   window_label_->Init(params);
-  window_label_view_ = new views::Label;
-  window_label_view_->SetEnabledColor(kLabelColor);
-  window_label_view_->SetBackgroundColor(kLabelBackground);
-  window_label_view_->SetShadows(gfx::ShadowValues(
-      1,
-      gfx::ShadowValue(
-          gfx::Point(0, kVerticalShadowOffset), kShadowBlur, kLabelShadow)));
+  window_label_button_view_ =
+      new OverviewLabelButton(this, GetWindow()->title());
+  window_label_button_view_->SetTextColor(views::LabelButton::STATE_NORMAL,
+                                          kLabelColor);
+  window_label_button_view_->SetTextColor(views::LabelButton::STATE_HOVERED,
+                                          kLabelColor);
+  window_label_button_view_->SetTextColor(views::LabelButton::STATE_PRESSED,
+                                          kLabelColor);
+  window_label_button_view_->set_animate_on_state_change(false);
+  window_label_button_view_->SetHorizontalAlignment(gfx::ALIGN_CENTER);
+  window_label_button_view_->SetBorder(views::Border::NullBorder());
+  window_label_button_view_->SetTextShadows(gfx::ShadowValues(
+      1, gfx::ShadowValue(gfx::Point(0, kVerticalShadowOffset), kShadowBlur,
+                          kLabelShadow)));
   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
-  window_label_view_->SetFontList(
+  window_label_button_view_->SetFontList(
       bundle.GetFontList(ui::ResourceBundle::BoldFont));
-  window_label_view_->SetText(title);
-  views::BoxLayout* layout = new views::BoxLayout(views::BoxLayout::kVertical,
-                                                  0,
-                                                  kVerticalLabelPadding,
-                                                  0);
-  window_label_view_->SetLayoutManager(layout);
-  window_label_->SetContentsView(window_label_view_);
-  window_label_->Show();
-}
-
-void WindowSelectorItem::UpdateSelectorButtons() {
-  aura::Window* window = GetWindow();
-
-  selector_item_activate_window_button_->SetBounds(target_bounds());
-  selector_item_activate_window_button_->SetAccessibleName(window->title());
-
-  TransparentActivateWindowButton* activate_button =
-      transform_window_.activate_button();
-  activate_button->SetBounds(target_bounds());
-  activate_button->SetAccessibleName(window->title());
+  window_label_->SetContentsView(window_label_button_view_);
 }
 
 void WindowSelectorItem::UpdateCloseButtonLayout(
     OverviewAnimationType animation_type) {
   if (!close_button_->visible()) {
     close_button_->SetVisible(true);
     SetupFadeInAfterLayout(close_button_widget_.GetNativeWindow());
   }
   ScopedOverviewAnimationSettings animation_settings(animation_type,
       close_button_widget_.GetNativeWindow());
 
   gfx::Rect transformed_window_bounds = ScreenUtil::ConvertRectFromScreen(
       close_button_widget_.GetNativeWindow()->GetRootWindow(),
       GetTransformedBounds(GetWindow()));
 
   gfx::Transform close_button_transform;
   close_button_transform.Translate(transformed_window_bounds.right(),
                                    transformed_window_bounds.y());
   close_button_widget_.GetNativeWindow()->SetTransform(
       close_button_transform);
 }
 
 void WindowSelectorItem::UpdateCloseButtonAccessibilityName() {
   close_button_->SetAccessibleName(l10n_util::GetStringFUTF16(
       IDS_ASH_OVERVIEW_CLOSE_ITEM_BUTTON_ACCESSIBLE_NAME,
       GetWindow()->title()));
 }
 
 }  // namespace ash