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2d640afe7b
Enhanced TransceiverBase error exception type to allow for language translatable messages. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4033 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
#ifndef POLLING_TRANSCEIVER_HPP__
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#define POLLING_TRANSCEIVER_HPP__
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#include <QObject>
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#include "TransceiverBase.hpp"
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#include "pimpl_h.hpp"
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//
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// Polling Transceiver
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//
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// Helper base class that encapsulates the emulation of continuous
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// update and caching of a transceiver state.
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//
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// Collaborations
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//
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// Implements the TransceiverBase post action interface and provides
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// the abstract poll() operation for sub-classes to implement. The
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// pol operation is invoked every poll_interval milliseconds.
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//
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// Responsibilities
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//
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// Because some rig interfaces don't immediately update after a state
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// change request; this class allows a rig a few polls to stabilise
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// to the requested state before signalling the change. This means
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// that clients don't see intermediate states that are sometimes
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// inaccurate, e.g. changing the split TX frequency on Icom rigs
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// requires a VFO switch and polls while switched will return the
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// wrong current frequency.
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//
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class PollingTransceiver
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: public TransceiverBase
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{
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Q_OBJECT; // for translation context
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protected:
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explicit PollingTransceiver (int poll_interval); // in milliseconds
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public:
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~PollingTransceiver ();
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protected:
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void do_sync (bool /* force_signal */) override final;
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// Sub-classes implement this and fetch what they can from the rig
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// in a non-intrusive manner.
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virtual void poll () = 0;
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void do_post_start () override final;
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void do_post_stop () override final;
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void do_post_frequency (Frequency) override final;
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void do_post_tx_frequency (Frequency) override final;
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void do_post_mode (MODE) override final;
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bool do_pre_update () override final;
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private:
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class impl;
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pimpl<impl> m_;
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};
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#endif
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