Squashed 'third_party/allwpilib_2017/' content from commit 35ac87d
Change-Id: I7bb6f5556c30d3f5a092e68de0be9c710c60c9f4
git-subtree-dir: third_party/allwpilib_2017
git-subtree-split: 35ac87d6ff8b7f061c4f18c9ea316e5dccd4888a
diff --git a/wpilibc/shared/include/SmartDashboard/SendableChooser.inc b/wpilibc/shared/include/SmartDashboard/SendableChooser.inc
new file mode 100644
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--- /dev/null
+++ b/wpilibc/shared/include/SmartDashboard/SendableChooser.inc
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+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2011-2017. 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 <algorithm>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace frc {
+
+/**
+ * Adds the given object to the list of options.
+ *
+ * On the {@link SmartDashboard} on the desktop, the object will appear as the
+ * given name.
+ *
+ * @param name the name of the option
+ * @param object the option
+ */
+template <class T>
+void SendableChooser<T>::AddObject(llvm::StringRef name, const T& object) {
+ m_choices[name] = object;
+}
+
+/**
+ * Add the given object to the list of options and marks it as the default.
+ *
+ * Functionally, this is very close to {@link SendableChooser#AddObject(const
+ * char *name, void *object) AddObject(...)} except that it will use this as
+ * the default option if none other is explicitly selected.
+ *
+ * @param name the name of the option
+ * @param object the option
+ */
+template <class T>
+void SendableChooser<T>::AddDefault(llvm::StringRef name, const T& object) {
+ m_defaultChoice = name;
+ AddObject(name, object);
+}
+
+/**
+ * Returns the selected option.
+ *
+ * If there is none selected, it will return the default. If there is none
+ * selected and no default, then it will return {@code nullptr}.
+ *
+ * @return the option selected
+ */
+template <class T>
+T SendableChooser<T>::GetSelected() {
+ std::string selected = m_table->GetString(kSelected, m_defaultChoice);
+ if (selected == "") {
+ return nullptr;
+ } else {
+ return m_choices[selected];
+ }
+}
+
+template <class T>
+void SendableChooser<T>::InitTable(std::shared_ptr<ITable> subtable) {
+ std::vector<std::string> keys;
+ m_table = subtable;
+ if (m_table != nullptr) {
+ for (const auto& choice : m_choices) {
+ keys.push_back(choice.first());
+ }
+
+ // Unlike std::map, llvm::StringMap elements are not sorted
+ std::sort(keys.begin(), keys.end());
+
+ m_table->PutValue(kOptions, nt::Value::MakeStringArray(std::move(keys)));
+ m_table->PutString(kDefault, m_defaultChoice);
+ }
+}
+
+} // namespace frc