Files
allwpilib/wpilibc/src/main/native/include/SmartDashboard/SendableChooser.h
Peter Johnson f9bece2ffb Update LiveWindow to provide continuous telemetry. (#771)
LiveWindow.updateValues() is now called from IterativeRobotBase on every
loop iteration.  Telemetry for all WPILib classes is enabled by default;
it can be disabled for specific classes using LiveWindow.disableTelemetry(),
or all telemetry can be disabled using LiveWindow.disableAllTelemetry().

This necessitated changing the hook methodology into other classes to
be more property-based rather than each class providing multiple functions.
This had the benefit of reducing boilerplate and increasing consistency.

- Remove NamedSendable, add name to Sendable.

- Provide SendableBase abstract class.

- Deprecate LiveWindow addSensor/addActuator interfaces.

- Add LiveWindow support to drive classes.

- Add addChild() helper functions to Subsystem.

- Fix inheritance hierarchy.  Now only sensors inherit from SensorBase.
  Other devices inherit from some combination of SendableBase, ErrorBase, or
  nothing.
2017-12-04 23:28:33 -08:00

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/*----------------------------------------------------------------------------*/
/* Copyright (c) 2011-2017 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 <llvm/StringMap.h>
#include <llvm/StringRef.h>
#include "SmartDashboard/SendableChooserBase.h"
namespace frc {
/**
* The SendableChooser class is a useful tool for presenting a selection of
* options to the SmartDashboard.
*
* For instance, you may wish to be able to select between multiple autonomous
* modes. You can do this by putting every possible Command you want to run as
* an autonomous into a SendableChooser and then put it into the SmartDashboard
* to have a list of options appear on the laptop. Once autonomous starts,
* simply ask the SendableChooser what the selected value is.
*
* @tparam T The type of values to be stored
* @see SmartDashboard
*/
template <class T>
class SendableChooser : public SendableChooserBase {
llvm::StringMap<T> m_choices;
template <class U>
static U _unwrap_smart_ptr(const U& value);
template <class U>
static U* _unwrap_smart_ptr(const std::unique_ptr<U>& value);
template <class U>
static std::weak_ptr<U> _unwrap_smart_ptr(const std::shared_ptr<U>& value);
public:
~SendableChooser() override = default;
void AddObject(llvm::StringRef name, T object);
void AddDefault(llvm::StringRef name, T object);
auto GetSelected() -> decltype(_unwrap_smart_ptr(m_choices[""]));
void InitSendable(SendableBuilder& builder) override;
};
} // namespace frc
#include "SendableChooser.inc"