(Chrome OS) Notify when the candidate window is opened/closed.

chrome/browser/chromeos/input_method/candidate_window_view.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_INPUT_METHOD_CANDIDATE_WINDOW_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_CANDIDATE_WINDOW_VIEW_H_
 
 #include "chrome/browser/chromeos/input_method/ibus_ui_controller.h"
 #include "ui/views/view.h"
 
 namespace chromeos {
 namespace input_method {
 
 class CandidateView;
 class InformationTextArea;
 class HidableArea;
 
 // CandidateWindowView is the main container of the candidate window UI.
 class CandidateWindowView : public views::View {
  public:
   // The object can be monitored by the observer.
   class Observer {
    public:
     virtual ~Observer() {}
     // The function is called when a candidate is committed.
     // See comments at NotifyCandidateClicked() in chromeos_input_method_ui.h
     // for details about the parameters.
     virtual void OnCandidateCommitted(int index, int button, int flag) = 0;
+
+    virtual void OnCandidateWindowOpened() = 0;
+    virtual void OnCandidateWindowClosed() = 0;
   };
 
   explicit CandidateWindowView(views::Widget* parent_frame);
   virtual ~CandidateWindowView();
   void Init();
 
   // Adds the given observer. The ownership is not transferred.
   void AddObserver(Observer* observer) {
     observers_.AddObserver(observer);
   }
@@ skipping 91 matching lines @@
   virtual void OnBoundsChanged(const gfx::Rect& previous_bounds) OVERRIDE;
 
  private:
   // Initializes the candidate views if needed.
   void MaybeInitializeCandidateViews(
       const InputMethodLookupTable& lookup_table);
 
   // Returns the appropriate area (header or footer) to put auxiliary texts.
   InformationTextArea* GetAuxiliaryTextArea();
 
+  bool IsCandidateWindowOpen() const;
+
   // The lookup table (candidates).
   InputMethodLookupTable lookup_table_;
 
   // The index in the current page of the candidate currently being selected.
   int selected_candidate_index_in_page_;
 
   // The observers of the object.
   ObserverList<Observer> observers_;
 
   // The parent frame.
@@ skipping 37 matching lines @@
 
   bool is_suggestion_window_location_available_;
 
   DISALLOW_COPY_AND_ASSIGN(CandidateWindowView);
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_CANDIDATE_WINDOW_VIEW_H_