android-calculatorpp/android-app/res/layout/cpp_wizard_step_drag_button.xml

<?xml version="1.0" encoding="utf-8"?>

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  ~ Copyright 2013 serso aka se.solovyev
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  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
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  ~    http://www.apache.org/licenses/LICENSE-2.0
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<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
			  xmlns:c="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
			  a:layout_width="match_parent"
			  a:layout_height="match_parent"
			  a:orientation="vertical">

	<TextView
			a:text="@string/cpp_wizard_dragbutton_description"
			a:layout_height="wrap_content"
			a:layout_width="match_parent"/>

	<TextView
			a:id="@+id/wizard_dragbutton_action_textview"
			a:layout_marginTop="10dp"
			a:textStyle="bold"
			a:text="@string/cpp_wizard_dragbutton_action_center"
			a:layout_height="wrap_content"
			a:layout_width="match_parent"/>

	<org.solovyev.android.view.drag.DirectionDragButton
			a:layout_margin="30dp"
			a:layout_height="100dp"
			a:layout_width="100dp"
			a:minWidth="100dp"
			a:minHeight="100dp"
			a:layout_gravity="center"
			a:id="@+id/wizard_dragbutton"
			a:text="9"
			c:textDown="^2"
			c:textLeft="sin"
			c:textUp="%"
			c:directionTextScale="0.5;0.5;0.5;0.33"
			style="?cpp_operation_button_style"/>

</LinearLayout>