Start of input method control on system bar.

This change creates a new icon to the right of the
notification area for the IMM to expose control over the
current IME. Currently it shows the IME subtype picker.

TODO: Connect directly to the IMMService to show the correct
icon (and hide the icon entirely when the input panel is not
visible).

Bug: 2975425
Change-Id: If07f30867b81950a0a86b00807a41e2ff2af389c

packages/SystemUI/res/layout-xlarge/status_bar.xml

@@ -28,11 +28,11 @@
         >
 
         <ImageView
-            class="com.android.systemui.statusbar.tablet.NotificationIconArea$MoreView"
             android:id="@+id/expand"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:src="@drawable/ic_sysbar_open"
+            android:background="@drawable/ic_sysbar_icon_bg"
             android:paddingLeft="6dip"
             android:onClick="notificationIconsClicked"
             />
@@ -100,8 +100,18 @@
                 android:background="@drawable/sysbar_hidenotification_handle"
                 android:layout_marginLeft="8dip"
                 />
+            <com.android.systemui.statusbar.tablet.InputMethodButton
+                android:id="@+id/imeButton"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:layout_marginLeft="8dip"
+                android:src="@drawable/ic_sysbar_ime_default"
+                android:background="@drawable/ic_sysbar_icon_bg"
+                android:visibility="visible"
+                />
         </com.android.systemui.statusbar.tablet.NotificationIconArea>
 
+
         <FrameLayout
             android:id="@+id/ticker"
             android:layout_width="wrap_content"

packages/SystemUI/src/com/android/systemui/statusbar/tablet/InputMethodButton.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.statusbar.tablet;
+
+import android.content.Context;
+import android.util.Slog;
+import android.view.View;
+import android.util.AttributeSet;
+import android.widget.ImageView;
+import android.view.inputmethod.InputMethodManager;
+
+import com.android.server.InputMethodManagerService;
+
+public class InputMethodButton extends ImageView {
+
+    // other services we wish to talk to
+    InputMethodManager mImm;
+
+    public InputMethodButton(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        // IME hookup
+        mImm = (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
+        
+        // TODO: read the current icon & visibility state directly from the service
+
+        // TODO: register for notifications about changes to visibility & subtype from service
+
+        setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                mImm.showInputMethodSubtypePicker();
+            }
+        });
+    }
+}
+