Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/views/search_box_view.h

Index: ui/app_list/views/search_box_view.h
diff --git a/ui/app_list/views/search_box_view.h b/ui/app_list/views/search_box_view.h
index bab315080a130465ebf4354a13d7b25d6665096d..055fb684fa851c4afc872688f760a295522f373d 100644
--- a/ui/app_list/views/search_box_view.h
+++ b/ui/app_list/views/search_box_view.h
@@ -10,6 +10,7 @@
 #include "base/macros.h"
 #include "ui/app_list/search_box_model_observer.h"
 #include "ui/app_list/speech_ui_model_observer.h"
+#include "ui/app_list/views/app_list_view.h"

[xiyuan, 2017/05/26 18:27:32]

ditto

[newcomer, 2017/05/26 23:20:22]

Done.

 #include "ui/gfx/shadow_value.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/textfield/textfield_controller.h"
@@ -54,6 +55,8 @@ class APP_LIST_EXPORT SearchBoxView : public views::View,
   bool HasSearch() const;
   void ClearSearch();
 
+  void SetAppListView(AppListView* app_list_view);
+
   // Sets the shadow border of the search box.
   void SetShadow(const gfx::ShadowValue& shadow);
 
@@ -119,6 +122,9 @@ class APP_LIST_EXPORT SearchBoxView : public views::View,
   SearchBoxImageButton* speech_button_;  // Owned by views hierarchy.
   views::Textfield* search_box_;  // Owned by views hierarchy.
   views::View* contents_view_;  // Owned by views hierarchy.
+  app_list::AppListView* app_list_view_;  //  Owned by views hierarchy.
+
+  bool is_fullscreen_enabled_;
 
   SearchBoxFocus focused_view_;  // Which element has TAB'd focus.