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#include "PollingTransceiver.hpp"
#include <exception>
#include <QObject>
#include <QString>
#include <QTimer>
#include "moc_PollingTransceiver.cpp"
namespace
{
unsigned const polls_to_stabilize {3};
}
PollingTransceiver::PollingTransceiver (int poll_interval, QObject * parent)
: TransceiverBase {parent}
, interval_ {poll_interval * 1000}
, poll_timer_ {nullptr}
, retries_ {0}
{
}
void PollingTransceiver::start_timer ()
{
if (interval_)
{
if (!poll_timer_)
{
poll_timer_ = new QTimer {this}; // pass ownership to
// QObject which handles
// destruction for us
connect (poll_timer_, &QTimer::timeout, this,
&PollingTransceiver::handle_timeout);
}
poll_timer_->start (interval_);
}
else
{
stop_timer ();
}
}
void PollingTransceiver::stop_timer ()
{
if (poll_timer_)
{
poll_timer_->stop ();
}
}
void PollingTransceiver::do_post_start ()
{
start_timer ();
if (!next_state_.online ())
{
// remember that we are expecting to go online
next_state_.online (true);
retries_ = polls_to_stabilize;
}
}
void PollingTransceiver::do_post_stop ()
{
// not much point waiting for rig to go offline since we are ceasing
// polls
stop_timer ();
}
void PollingTransceiver::do_post_frequency (Frequency f, MODE m)
{
// take care not to set the expected next mode to unknown since some
// callers use mode == unknown to signify that they do not know the
// mode and don't care
if (next_state_.frequency () != f || (m != UNK && next_state_.mode () != m))
{
// update expected state with new frequency and set poll count
next_state_.frequency (f);
if (m != UNK)
{
next_state_.mode (m);
}
retries_ = polls_to_stabilize;
}
}
void PollingTransceiver::do_post_tx_frequency (Frequency f, MODE)
{
if (next_state_.tx_frequency () != f)
{
// update expected state with new TX frequency and set poll
// count
next_state_.tx_frequency (f);
next_state_.split (f); // setting non-zero TX frequency means split
retries_ = polls_to_stabilize;
}
}
void PollingTransceiver::do_post_mode (MODE m)
{
// we don't ever expect mode to goto to unknown
if (m != UNK && next_state_.mode () != m)
{
// update expected state with new mode and set poll count
next_state_.mode (m);
retries_ = polls_to_stabilize;
}
}
void PollingTransceiver::do_post_ptt (bool p)
{
if (next_state_.ptt () != p)
{
// update expected state with new PTT and set poll count
next_state_.ptt (p);
retries_ = polls_to_stabilize;
//retries_ = 0; // fast feedback on PTT
}
}
bool PollingTransceiver::do_pre_update ()
{
// if we are holding off a change then withhold the signal
if (retries_ && state () != next_state_)
{
return false;
}
return true;
}
void PollingTransceiver::do_sync (bool force_signal, bool no_poll)
{
if (!no_poll) poll (); // tell sub-classes to update our state
// Signal new state if it is directly requested or, what we expected
// or, hasn't become what we expected after polls_to_stabilize
// polls. Unsolicited changes will be signalled immediately unless
// they intervene in a expected sequence where they will be delayed.
if (retries_)
{
--retries_;
if (force_signal || state () == next_state_ || !retries_)
{
// our client wants a signal regardless
// or the expected state has arrived
// or there are no more retries
force_signal = true;
}
}
else if (force_signal || state () != last_signalled_state_)
{
// here is the normal passive polling path either our client has
// requested a state update regardless of change or state has
// changed asynchronously
force_signal = true;
}
if (force_signal)
{
// reset everything, record and signal the current state
retries_ = 0;
next_state_ = state ();
last_signalled_state_ = state ();
update_complete (true);
}
}
void PollingTransceiver::handle_timeout ()
{
QString message;
// we must catch all exceptions here since we are called by Qt and
// inform our parent of the failure via the offline() message
try
{
do_sync ();
}
catch (std::exception const& e)
{
message = e.what ();
}
catch (...)
{
message = tr ("Unexpected rig error");
}
if (!message.isEmpty ())
{
offline (message);
}
}
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