Introduce state to home card.

athena/home/home_card_impl.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 "athena/home/public/home_card.h"
 
 #include "athena/home/app_list_view_delegate.h"
 #include "athena/home/public/app_model_builder.h"
 #include "athena/input/public/accelerator_manager.h"
 #include "athena/screen/public/screen_manager.h"
@@ skipping 75 matching lines @@
 
   void Init();
 
  private:
   enum Command {
     COMMAND_SHOW_HOME_CARD,
   };
   void InstallAccelerators();
 
   // Overridden from HomeCard:
+  virtual void SetState(State state) OVERRIDE;
   virtual void RegisterSearchProvider(
       app_list::SearchProvider* search_provider) OVERRIDE;
   virtual void UpdateVirtualKeyboardBounds(
       const gfx::Rect& bounds) OVERRIDE;
 
   // AcceleratorHandler:
   virtual bool IsCommandEnabled(int command_id) const OVERRIDE { return true; }
   virtual bool OnAcceleratorFired(int command_id,
                                   const ui::Accelerator& accelerator) OVERRIDE {
     DCHECK_EQ(COMMAND_SHOW_HOME_CARD, command_id);
-    if (home_card_widget_->IsVisible())
-      home_card_widget_->Hide();
+    if (state_ == HIDDEN)
+      SetState(VISIBLE_CENTERED);
     else
-      home_card_widget_->Show();
+      SetState(HIDDEN);
     return true;
   }
 
   scoped_ptr<AppModelBuilder> model_builder_;
 
+  HomeCard::State state_;
+
   views::Widget* home_card_widget_;
   AppListViewDelegate* view_delegate_;
   HomeCardLayoutManager* layout_manager_;
 
   // Right now HomeCard allows only one search provider.
   // TODO(mukai): port app-list's SearchController and Mixer.
   scoped_ptr<app_list::SearchProvider> search_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(HomeCardImpl);
 };
 
 HomeCardImpl::HomeCardImpl(AppModelBuilder* model_builder)
     : model_builder_(model_builder),
+      state_(HIDDEN),
       home_card_widget_(NULL),
       layout_manager_(NULL) {
   DCHECK(!instance);
   instance = this;
 }
 
 HomeCardImpl::~HomeCardImpl() {
   DCHECK(instance);
   home_card_widget_->CloseNow();
   view_delegate_ = NULL;
   instance = NULL;
 }
 
+void HomeCardImpl::SetState(HomeCard::State state) {
+  if (state == HIDDEN)
+    home_card_widget_->Hide();
+  else
+    home_card_widget_->Show();
+  state_ = state;
+}
+
 void HomeCardImpl::RegisterSearchProvider(
     app_list::SearchProvider* search_provider) {
   DCHECK(!search_provider_);
   search_provider_.reset(search_provider);
   view_delegate_->RegisterSearchProvider(search_provider_.get());
 }
 
 void HomeCardImpl::UpdateVirtualKeyboardBounds(
     const gfx::Rect& bounds) {
   layout_manager_->UpdateVirtualKeyboardBounds(bounds);
@@ skipping 12 matching lines @@
   if (search_provider_)
     view_delegate_->RegisterSearchProvider(search_provider_.get());
   app_list::AppListView* view = new app_list::AppListView(view_delegate_);
   view->InitAsBubbleAtFixedLocation(
       container,
       0 /* initial_apps_page */,
       gfx::Point(),
       views::BubbleBorder::FLOAT,
       true /* border_accepts_events */);
   home_card_widget_ = view->GetWidget();
+  // TODO: the initial value might not be visible.
+  state_ = VISIBLE_CENTERED;
   view->ShowWhenReady();
 }
 
 void HomeCardImpl::InstallAccelerators() {
   const AcceleratorData accelerator_data[] = {
       {TRIGGER_ON_PRESS, ui::VKEY_L, ui::EF_CONTROL_DOWN,
        COMMAND_SHOW_HOME_CARD, AF_NONE},
   };
   AcceleratorManager::Get()->RegisterAccelerators(
       accelerator_data, arraysize(accelerator_data), this);
@@ skipping 15 matching lines @@
   instance = NULL;
 }
 
 // static
 HomeCard* HomeCard::Get() {
   DCHECK(instance);
   return instance;
 }
 
 }  // namespace athena