Calculator overlay added

calculatorpp/res/layout/overlay_layout.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
+              a:orientation="vertical"
+              style="@style/cpp_widget_main_layout_style">
+
+    <include layout="@layout/widget_editor"
+             a:layout_weight="2"
+             a:layout_width="match_parent"
+             a:layout_height="0dp"/>
+
+    <LinearLayout a:layout_weight="1"
+                  a:layout_width="match_parent"
+                  a:layout_height="0dp">
+
+        <include layout="@layout/widget_equals_button"
+                 a:layout_margin="@dimen/cpp_button_margin"
+                 a:layout_weight="1"
+                 a:layout_width="0dp"
+                 a:layout_height="match_parent"/>
+
+        <include layout="@layout/widget_display"
+                      a:layout_weight="5"
+                      a:layout_width="0dp"
+                      a:layout_height="wrap_content"/>
+
+    </LinearLayout>
+
+    <include layout="@layout/widget_keyboard"
+             a:layout_weight="5"
+             a:layout_width="match_parent"
+             a:layout_height="0dp"/>
+
+</LinearLayout>

calculatorpp/res/values/theme_gray.xml

@@ -86,6 +86,11 @@
         <item name="android:layout_width">match_parent</item>
     </style>
 
+    <style name="cpp_overlay_main_layout_style" parent="cpp_default_main_layout_style">
+        <item name="android:layout_height">400dp</item>
+        <item name="android:layout_width">250dp</item>
+    </style>
+
     <style name="cpp_widget_main_layout_style" parent="cpp_default_main_layout_style">
         <item name="android:padding">1dp</item>
         <item name="android:layout_margin">@dimen/cpp_widget_margin</item>