Add fluent builders for more flexibly adding data to Shuffleboard (#1022)

wpilibc/src/main/native/include/frc/shuffleboard/ShuffleboardComponentBase.h

@@ -0,0 +1,61 @@
+/*----------------------------------------------------------------------------*/
+/* 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 <memory>
+#include <string>
+
+#include <networktables/NetworkTable.h>
+#include <networktables/NetworkTableValue.h>
+#include <wpi/StringMap.h>
+#include <wpi/Twine.h>
+
+#include "frc/shuffleboard/ShuffleboardValue.h"
+
+namespace frc {
+
+class ShuffleboardContainer;
+
+/**
+ * A shim class to allow storing ShuffleboardComponents in arrays.
+ */
+class ShuffleboardComponentBase : public virtual ShuffleboardValue {
+ public:
+  ShuffleboardComponentBase(ShuffleboardContainer& parent,
+                            const wpi::Twine& title,
+                            const wpi::Twine& type = "");
+
+  virtual ~ShuffleboardComponentBase() = default;
+
+  void SetType(const wpi::Twine& type);
+
+  void BuildMetadata(std::shared_ptr<nt::NetworkTable> metaTable);
+
+  ShuffleboardContainer& GetParent();
+
+  const std::string& GetType() const;
+
+ protected:
+  wpi::StringMap<std::shared_ptr<nt::Value>> m_properties;
+  bool m_metadataDirty = false;
+  int m_column = -1;
+  int m_row = -1;
+  int m_width = -1;
+  int m_height = -1;
+
+ private:
+  ShuffleboardContainer& m_parent;
+  std::string m_type;
+
+  /**
+   * Gets the custom properties for this component. May be null.
+   */
+  const wpi::StringMap<std::shared_ptr<nt::Value>>& GetProperties() const;
+};
+
+}  // namespace frc