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Fix C++ JoystickButton and POVButton (#2259)

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C++ JoystickButton and POVButton were both nonfunctional due to slicing when trigger passes itself by value to the button scheduler it creates.

Fix is to remove the virtual Get() method entirely and use only the m_isActive functor; since the subclass now passes the button condition back as a functor to the base class, in which it's stored as a member, it will now still work after being sliced.
This commit is contained in:
Oblarg
2020-01-12 17:57:28 -05:00
committed by Peter Johnson
parent 822e75ec45
commit cba21a768f
4 changed files with 33 additions and 51 deletions
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33
wpilibNewCommands/src/main/native/include/frc2/command/button/Trigger.h
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@@ -47,13 +47,6 @@ class Trigger {
Trigger(const Trigger& other);
/**
* Returns whether the trigger is active. Can be overridden by a subclass.
*
* @return Whether the trigger is active.
*/
virtual bool Get() const { return m_isActive(); }
/**
* Binds a command to start when the trigger becomes active. Takes a
* raw pointer, and so is non-owning; users are responsible for the lifespan
@@ -79,11 +72,11 @@ class Trigger {
Command, std::remove_reference_t<T>>>>
Trigger WhenActive(T&& command, bool interruptible = true) {
CommandScheduler::GetInstance().AddButton(
[pressedLast = Get(), *this,
[pressedLast = m_isActive(), *this,
command = std::make_unique<std::remove_reference_t<T>>(
std::forward<T>(command)),
interruptible]() mutable {
bool pressed = Get();
bool pressed = m_isActive();
if (!pressedLast && pressed) {
command->Schedule(interruptible);
@@ -138,11 +131,11 @@ class Trigger {
Command, std::remove_reference_t<T>>>>
Trigger WhileActiveContinous(T&& command, bool interruptible = true) {
CommandScheduler::GetInstance().AddButton(
[pressedLast = Get(), *this,
[pressedLast = m_isActive(), *this,
command = std::make_unique<std::remove_reference_t<T>>(
std::forward<T>(command)),
interruptible]() mutable {
bool pressed = Get();
bool pressed = m_isActive();
if (pressed) {
command->Schedule(interruptible);
@@ -198,11 +191,11 @@ class Trigger {
Command, std::remove_reference_t<T>>>>
Trigger WhileActiveOnce(T&& command, bool interruptible = true) {
CommandScheduler::GetInstance().AddButton(
[pressedLast = Get(), *this,
[pressedLast = m_isActive(), *this,
command = std::make_unique<std::remove_reference_t<T>>(
std::forward<T>(command)),
interruptible]() mutable {
bool pressed = Get();
bool pressed = m_isActive();
if (!pressedLast && pressed) {
command->Schedule(interruptible);
@@ -240,11 +233,11 @@ class Trigger {
Command, std::remove_reference_t<T>>>>
Trigger WhenInactive(T&& command, bool interruptible = true) {
CommandScheduler::GetInstance().AddButton(
[pressedLast = Get(), *this,
[pressedLast = m_isActive(), *this,
command = std::make_unique<std::remove_reference_t<T>>(
std::forward<T>(command)),
interruptible]() mutable {
bool pressed = Get();
bool pressed = m_isActive();
if (pressedLast && !pressed) {
command->Schedule(interruptible);
@@ -298,11 +291,11 @@ class Trigger {
Command, std::remove_reference_t<T>>>>
Trigger ToggleWhenActive(T&& command, bool interruptible = true) {
CommandScheduler::GetInstance().AddButton(
[pressedLast = Get(), *this,
[pressedLast = m_isActive(), *this,
command = std::make_unique<std::remove_reference_t<T>>(
std::forward<T>(command)),
interruptible]() mutable {
bool pressed = Get();
bool pressed = m_isActive();
if (!pressedLast && pressed) {
if (command->IsScheduled()) {
@@ -333,7 +326,7 @@ class Trigger {
* @return A trigger which is active when both component triggers are active.
*/
Trigger operator&&(Trigger rhs) {
return Trigger([*this, rhs] { return Get() && rhs.Get(); });
return Trigger([*this, rhs] { return m_isActive() && rhs.m_isActive(); });
}
/**
@@ -342,7 +335,7 @@ class Trigger {
* @return A trigger which is active when either component trigger is active.
*/
Trigger operator||(Trigger rhs) {
return Trigger([*this, rhs] { return Get() || rhs.Get(); });
return Trigger([*this, rhs] { return m_isActive() || rhs.m_isActive(); });
}
/**
@@ -352,7 +345,7 @@ class Trigger {
* and vice-versa.
*/
Trigger operator!() {
return Trigger([*this] { return !Get(); });
return Trigger([*this] { return !m_isActive(); });
}
private: