WaitForSignalState.h

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#pragma once
 
#include "WaitStateBase.h"
 
#include <QtCore/QMetaObject>
 
#include <functional>
 
class WaitForSignalState : public WaitStateBase
{
    Q_OBJECT
    Q_DISABLE_COPY(WaitForSignalState)
 
public:
    template<typename Func>
    WaitForSignalState(const QString& stateName, QState* parent,
                       typename QtPrivate::FunctionPointer<Func>::Object* sender,
                       Func signal, int timeoutMsecs = 0)
        : WaitStateBase(stateName, parent, timeoutMsecs)
    {
        // Store the connection setup as a lambda to be called on entry
        // Use a lambda to handle signals with any parameter types
        _connectFunc = [this, sender, signal]() {
            _signalConnection = connect(sender, signal, this, [this]() {
                _onSignalReceived();
            });
        };
    }
 
protected:
    void connectWaitSignal() override;
    void disconnectWaitSignal() override;
 
private:
    void _onSignalReceived();
 
    QMetaObject::Connection _signalConnection;
    std::function<void()> _connectFunc;
};