Allow binding commands to POV (#1378)

wpilibc/src/main/native/include/frc/buttons/POVButton.h

@@ -0,0 +1,36 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2018 FIRST. All Rights Reserved.                             */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#pragma once
+
+#include "frc/GenericHID.h"
+#include "frc/buttons/Button.h"
+
+namespace frc {
+class POVButton : public Button {
+ public:
+  /**
+   * Creates a POV button for triggering commands.
+   *
+   * @param joystick The GenericHID object that has the POV
+   * @param angle The desired angle in degrees (e.g. 90, 270)
+   * @param povNumber The POV number (@see GenericHID#GetPOV)
+   */
+  POVButton(GenericHID& joystick, int angle, int povNumber = 0);
+  virtual ~POVButton() = default;
+
+  POVButton(POVButton&&) = default;
+  POVButton& operator=(POVButton&&) = default;
+
+  bool Get() override;
+
+ private:
+  GenericHID* m_joystick;
+  int m_angle;
+  int m_povNumber;
+};
+}  // namespace frc