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

chrome/browser/chromeos/input_method/input_method_manager.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_INPUT_METHOD_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_MANAGER_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 36 matching lines @@
         InputMethodManager* manager,
         const InputMethodDescriptor& current_input_method,
         size_t num_active_input_methods) = 0;
 
     // Called when the list of properties is changed.
     virtual void PropertyListChanged(
         InputMethodManager* manager,
         const ImePropertyList& current_ime_properties) = 0;
   };
 
+  // CandidateWindowObserver is notified of events related to the candidate
+  // window.  These events won't occur when the virtual keyboard is used,
+  // since it controls its own candidate window.
+  class CandidateWindowObserver {
+   public:
+    virtual ~CandidateWindowObserver() {}
+
+    // Called when the candidate window is opened.
+    virtual void CandidateWindowOpened(InputMethodManager* manager) = 0;
+
+    // Called when the candidate window is closed.
+    virtual void CandidateWindowClosed(InputMethodManager* manager) = 0;
+  };
+
   class PreferenceObserver {
    public:
     virtual ~PreferenceObserver() {}
 
     // Called when the preferences have to be updated.
     virtual void PreferenceUpdateNeeded(
         InputMethodManager* manager,
         const InputMethodDescriptor& previous_input_method,
         const InputMethodDescriptor& current_input_method) = 0;
 
@@ skipping 11 matching lines @@
         const std::string& virtual_keyboard_layout) = 0;
   };
 
   virtual ~InputMethodManager() {}
 
   static InputMethodManager* GetInstance();
 
   // Adds an observer to receive notifications of input method related
   // changes as desribed in the Observer class above.
   virtual void AddObserver(Observer* observer) = 0;
+  virtual void AddCandidateWindowObserver(
+      CandidateWindowObserver* observer) = 0;
   virtual void AddPreLoginPreferenceObserver(PreferenceObserver* observer) = 0;
   virtual void AddPostLoginPreferenceObserver(PreferenceObserver* observer) = 0;
   virtual void AddVirtualKeyboardObserver(
       VirtualKeyboardObserver* observer) = 0;
   virtual void RemoveObserver(Observer* observer) = 0;
+  virtual void RemoveCandidateWindowObserver(
+      CandidateWindowObserver* observer) = 0;
   virtual void RemovePreLoginPreferenceObserver(
       PreferenceObserver* observer) = 0;
   virtual void RemovePostLoginPreferenceObserver(
       PreferenceObserver* observer) = 0;
   virtual void RemoveVirtualKeyboardObserver(
       VirtualKeyboardObserver* observer) = 0;
 
   // Returns all input methods that are supported, including ones not active.
   // Caller has to delete the returned list. This function never returns NULL.
   virtual InputMethodDescriptors* GetSupportedInputMethods() = 0;
@@ skipping 142 matching lines @@
   virtual InputMethodDescriptor previous_input_method() const = 0;
   virtual InputMethodDescriptor current_input_method() const = 0;
 
   virtual const ImePropertyList& current_ime_properties() const = 0;
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_MANAGER_H_