Widget implementation

calculatorpp/res/layout/widget_left_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/leftButton"
+        a:text="◀"
+        style="@style/metro_control_button_style"/>