mirror of
https://github.com/wpilibsuite/allwpilib
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5aa5e3e09e
* Java SendableChooser now decorates with type (non-breaking change) * C++ SendableChooser now is templated on the type instead of using void* and stores values (breaking change) * C++ SendableChooser now uses llvm::StringMap instead of std::map
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/*----------------------------------------------------------------------------*/
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/* Copyright (c) FIRST 2011-2017. All Rights Reserved. */
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/* Open Source Software - may be modified and shared by FRC teams. The code */
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/* must be accompanied by the FIRST BSD license file in the root directory of */
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/* the project. */
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/*----------------------------------------------------------------------------*/
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#pragma once
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#include <algorithm>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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namespace frc {
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/**
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* Adds the given object to the list of options.
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*
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* On the {@link SmartDashboard} on the desktop, the object will appear as the
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* given name.
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*
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* @param name the name of the option
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* @param object the option
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*/
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template <class T>
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void SendableChooser<T>::AddObject(llvm::StringRef name, const T& object) {
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m_choices[name] = object;
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}
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/**
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* Add the given object to the list of options and marks it as the default.
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*
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* Functionally, this is very close to {@link SendableChooser#AddObject(const
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* char *name, void *object) AddObject(...)} except that it will use this as
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* the default option if none other is explicitly selected.
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*
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* @param name the name of the option
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* @param object the option
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*/
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template <class T>
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void SendableChooser<T>::AddDefault(llvm::StringRef name, const T& object) {
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m_defaultChoice = name;
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AddObject(name, object);
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}
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/**
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* Returns the selected option.
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*
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* If there is none selected, it will return the default. If there is none
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* selected and no default, then it will return {@code nullptr}.
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*
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* @return the option selected
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*/
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template <class T>
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T SendableChooser<T>::GetSelected() {
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std::string selected = m_table->GetString(kSelected, m_defaultChoice);
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if (selected == "") {
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return nullptr;
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} else {
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return m_choices[selected];
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}
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}
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template <class T>
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void SendableChooser<T>::InitTable(std::shared_ptr<ITable> subtable) {
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std::vector<std::string> keys;
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m_table = subtable;
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if (m_table != nullptr) {
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for (const auto& choice : m_choices) {
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keys.push_back(choice.first());
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}
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// Unlike std::map, llvm::StringMap elements are not sorted
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std::sort(keys.begin(), keys.end());
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m_table->PutValue(kOptions, nt::Value::MakeStringArray(std::move(keys)));
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m_table->PutString(kDefault, m_defaultChoice);
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}
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}
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} // namespace frc
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