Use input method to control visibility of virtual keyboard

views/ime/input_method_manager.cc

+// 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.
+
+#include "views/ime/input_method_manager.h"
+
+#include "base/logging.h"
+
+namespace views {
+
+void InputMethodManager::AddTextInputTypeChangedListener(
+    TextInputTypeChangedListener* listener) {
+  text_input_type_changed_listeners_.AddObserver(listener);
+}
+
+void InputMethodManager::RemoveTextInputTypeChangedListener(
+    TextInputTypeChangedListener* listener) {
+  text_input_type_changed_listeners_.RemoveObserver(listener);
+}
+
+void InputMethodManager::OnTextInputTypeChanged(ui::TextInputType type,
+    Widget* widget) {
+  FOR_EACH_OBSERVER(TextInputTypeChangedListener,
+                    text_input_type_changed_listeners_,
+                    TextInputTypeChanged(type, widget));
+}
+
+InputMethodManager::InputMethodManager() {
+}
+
+InputMethodManager::~InputMethodManager() {
+}
+
+// static
+InputMethodManager*
+InputMethodManager::GetInstance() {
+  return Singleton<InputMethodManager>::get();
+}
+
+}  // namespace views