Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/views/search_box_view.cc

Index: ui/app_list/views/search_box_view.cc
diff --git a/ui/app_list/views/search_box_view.cc b/ui/app_list/views/search_box_view.cc
index 7acba845febcd0d4e5a8ece9eb0d896d608d78c4..56c0e38760881a1a10d6da6d4606ff4dacf88890 100644
--- a/ui/app_list/views/search_box_view.cc
+++ b/ui/app_list/views/search_box_view.cc
@@ -10,12 +10,14 @@
 #include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 #include "ui/app_list/app_list_constants.h"
+#include "ui/app_list/app_list_features.h"
 #include "ui/app_list/app_list_model.h"
 #include "ui/app_list/app_list_switches.h"
 #include "ui/app_list/app_list_view_delegate.h"
 #include "ui/app_list/resources/grit/app_list_resources.h"
 #include "ui/app_list/search_box_model.h"
 #include "ui/app_list/speech_ui_model.h"
+#include "ui/app_list/views/app_list_view.h"
 #include "ui/app_list/views/contents_view.h"
 #include "ui/app_list/views/search_box_view_delegate.h"
 #include "ui/base/ime/text_input_flags.h"
@@ -33,6 +35,7 @@
 #include "ui/views/layout/box_layout.h"
 #include "ui/views/layout/fill_layout.h"
 #include "ui/views/shadow_border.h"
+#include "ui/views/widget/widget.h"
 
 namespace app_list {
 
@@ -41,11 +44,13 @@ namespace {
 const int kPadding = 16;
 const int kInnerPadding = 24;
 const int kPreferredWidth = 360;
+const int kPreferredWidthFullscreen = 544;
 const int kPreferredHeight = 48;
 
 const SkColor kHintTextColor = SkColorSetRGB(0xA0, 0xA0, 0xA0);
 
 const int kBackgroundBorderCornerRadius = 2;
+const int kBackgroundBorderCornerRadiusFullscreen = 20;
 
 // A background that paints a solid white rounded rect with a thin grey border.
 class SearchBoxBackground : public views::Background {
@@ -61,7 +66,11 @@ class SearchBoxBackground : public views::Background {
     cc::PaintFlags flags;
     flags.setAntiAlias(true);
     flags.setColor(kSearchBoxBackground);
-    canvas->DrawRoundRect(bounds, kBackgroundBorderCornerRadius, flags);
+    canvas->DrawRoundRect(bounds,
+                          features::IsFullscreenAppListEnabled()
+                              ? kBackgroundBorderCornerRadiusFullscreen
+                              : kBackgroundBorderCornerRadius,
+                          flags);
   }
 
   DISALLOW_COPY_AND_ASSIGN(SearchBoxBackground);
@@ -122,6 +131,7 @@ SearchBoxView::SearchBoxView(SearchBoxViewDelegate* delegate,
       speech_button_(NULL),
       search_box_(new views::Textfield),
       contents_view_(NULL),
+      app_list_view_(NULL),
       focused_view_(FOCUS_SEARCH_BOX) {
   SetLayoutManager(new views::FillLayout);
   AddChildView(content_container_);
@@ -157,6 +167,7 @@ SearchBoxView::SearchBoxView(SearchBoxViewDelegate* delegate,
 
   view_delegate_->GetSpeechUI()->AddObserver(this);
   ModelChanged();
+  is_fullscreen_enabled_ = features::IsFullscreenAppListEnabled();
 }
 
 SearchBoxView::~SearchBoxView() {
@@ -188,6 +199,10 @@ void SearchBoxView::ClearSearch() {
   NotifyQueryChanged();
 }
 
+void SearchBoxView::SetAppListView(AppListView* app_list_view) {
+  app_list_view_ = app_list_view;
+}
+
 void SearchBoxView::SetShadow(const gfx::ShadowValue& shadow) {
   SetBorder(base::MakeUnique<views::ShadowBorder>(shadow));
   Layout();
@@ -287,7 +302,9 @@ void SearchBoxView::SetBackButtonLabel(bool folder) {
 }
 
 gfx::Size SearchBoxView::GetPreferredSize() const {
-  return gfx::Size(kPreferredWidth, kPreferredHeight);
+  return gfx::Size(
+      is_fullscreen_enabled_ ? kPreferredWidthFullscreen : kPreferredWidth,
+      kPreferredHeight);
 }
 
 bool SearchBoxView::OnMouseWheel(const ui::MouseWheelEvent& event) {
@@ -325,6 +342,11 @@ void SearchBoxView::ContentsChanged(views::Textfield* sender,
   UpdateModel();
   view_delegate_->AutoLaunchCanceled();
   NotifyQueryChanged();
+
+  if (is_fullscreen_enabled_ && !app_list_view_->IsFullscreen()) {
+    // If the app list is in the peeking state, switch it to fullscreen.
+    app_list_view_->ToFullscreen();
+  }
 }
 
 bool SearchBoxView::HandleKeyEvent(views::Textfield* sender,