52 lines
1.2 KiB
C++
Executable File
52 lines
1.2 KiB
C++
Executable File
/**
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* @RDE_HEADER@
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* ICommand
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* $Id$
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* $HeadURL$
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* $Author$
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* Created by Christian Fröbel, SLSE, 2017-06-29
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*/
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#pragma once
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#include <AudioVideoManagement/avm_export.h>
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#include <QObject>
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namespace AudioVideoManagement
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{
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/**
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* Internal helper class for AvaControl in order to send a command to the
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* AVS system and synchronize with the reponse.
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* This way AvaControl ensures that a new command is only sent when the
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* response of the previous command has been received.
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*
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* The idea is that upon send() the command connects to the signals of interest
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* of AvaComm. When the command is done it calls AvaControl::done(this).
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*
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* @author Christian Fröbel
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*/
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class AVM_COMMON_EXPORT ICommand : public QObject
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{
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Q_OBJECT
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public:
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virtual ~ICommand() = default;
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virtual void send() = 0;
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virtual QString debug() const = 0;
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virtual bool canTimeout() const { return false; }
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/**
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* Check whether this command nullifies other.
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* Nullifying means that when this command is sent after other,
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* it would nullify the effect of other.
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* If so, other can be dropped.
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*/
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virtual bool nullifies(ICommand *other) const { Q_UNUSED(other); return false; }
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};
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} // namespace AudioVideoManagement
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