Use input method to control visibility of virtual keyboard

views/ime/input_method_base.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 VIEWS_IME_INPUT_METHOD_BASE_H_
 #define VIEWS_IME_INPUT_METHOD_BASE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 24 matching lines @@
   // If a derived class overrides this method, it should call parent's
   // implementation first, to make sure |widget_focused_| flag can be updated
   // correctly.
   virtual void OnFocus() OVERRIDE;
 
   // If a derived class overrides this method, it should call parent's
   // implementation first, to make sure |widget_focused_| flag can be updated
   // correctly.
   virtual void OnBlur() OVERRIDE;
 
+  // If a derived class overrides this method, it should call parent's
+  // implementation first.
+  virtual void OnTextInputTypeChanged(View* view) OVERRIDE;
+
   virtual TextInputClient* GetTextInputClient() const OVERRIDE;
   virtual ui::TextInputType GetTextInputType() const OVERRIDE;
 
   // Overridden from FocusChangeListener. Derived classes shouldn't override
   // this method. Override FocusedViewWillChange() and FocusedViewDidChange()
   // instead.
   virtual void FocusWillChange(View* focused_before, View* focused) OVERRIDE;
 
  protected:
   // Getters and setters of properties.
@@ skipping 42 matching lines @@
 
   // Indicates if the top-level widget is focused or not.
   bool widget_focused_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodBase);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_IME_INPUT_METHOD_BASE_H_