Can't get signal from custom class in Q_PROPERTY

Mihaill

Hi!
I have custom class Bluetooth.

#ifndef BLUETOOTH_H
#define BLUETOOTH_H

#include <QObject>
#include <QDebug>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonArray>
#include <QJsonValue>
#include <QTime>
#include <QTimer>
#include <QBluetoothLocalDevice>
#include <QBluetoothDeviceDiscoveryAgent>
#include <QBluetoothDeviceInfo>
#include <QBluetoothSocket>
#include <QBluetoothServer>
#include <QBluetoothServiceDiscoveryAgent>
#include <QBluetoothLocalDevice>
#include <QBluetoothUuid>
#include <QBluetoothAddress>
#include <QLowEnergyController>
#include <QLowEnergyService>
#include <QLowEnergyCharacteristic>
#include "structures.h"

class Bluetooth : public QObject
{
    Q_OBJECT
//    Q_GADGET
public:
    explicit Bluetooth(QObject *parent = nullptr);
    ~Bluetooth();
    bool operator != (const Bluetooth &bluetooth) {return m_bluetoothUuidService != bluetooth.m_bluetoothUuidService;}
    bool operator = (const Bluetooth &bluetooth) {return this;}


    bool m_startStatus;
    bool m_isBody;
    int m_speed;
    int m_targetTime;
    int m_forceValue;
    bool m_redLed;

    Q_PROPERTY(bool startStatus MEMBER m_startStatus NOTIFY startStatusChanged)
    Q_PROPERTY(bool isBody MEMBER m_isBody NOTIFY isBodyChanged)
    Q_PROPERTY(int speed MEMBER m_speed NOTIFY speedChanged)
    Q_PROPERTY(int targetTime MEMBER m_targetTime NOTIFY targetTimeChanged)
    Q_PROPERTY(int forceValue MEMBER m_forceValue NOTIFY forceValueChanged)
    Q_PROPERTY(bool redLed MEMBER m_redLed NOTIFY redLedChanged)

public slots:
    void startConnectToBluetooth();
    void stopFindAvailableBluetooth();
    void connectToBluetooth();
    void disconnectToBluetooth();

    void setStartStatus(bool value);
    void setRedLed(bool value);
    void setBody(bool value);
    void setTargetTime(int value);
    void setModuleSpeed(int value);
    void setReverSpeed();
    void setForceValue(int value);

signals:
    void startStatusChanged(bool value);
    void isBodyChanged(bool value);
    void speedChanged(int value);
    void targetTimeChanged(int value);
    void forceValueChanged(int value);
    void redLedChanged(bool value);

    void bluetoothFindedNewDevice(QString id, QString name, QString address);

private:
    QBluetoothDeviceDiscoveryAgent * m_bluetoothDeviceDiscoveryAgent;
    QBluetoothServiceDiscoveryAgent * m_bluetoothServiceDiscoveryAgent;
    QBluetoothSocket *m_bluetoothSocket = new QBluetoothSocket(QBluetoothServiceInfo::RfcommProtocol);
    QBluetoothServer* m_bluetoothServer = new QBluetoothServer(QBluetoothServiceInfo::RfcommProtocol, this);
    QLowEnergyController *m_lowEnergyController;
    QLowEnergyService *m_lowEnergyService;
    QBluetoothUuid m_bluetoothUuidService = QBluetoothUuid("{99999999-9999-c8c8-c8c8-d2d2d22d2d2d}");
    QLowEnergyCharacteristic m_QLowEnergyCharacteristicWorkParameters;
    QLowEnergyCharacteristic m_QLowEnergyCharacteristicCycleSettings;
    QLowEnergyCharacteristic m_QLowEnergyCharacteristicWorkTime;
    QLowEnergyCharacteristic m_QLowEnergyCharacteristicFirmwareAndHardwareVersion;
    QTimer m_timerGetStateBluetooth;
    QVector<QBluetoothDeviceInfo> m_vectorBluetoothDevice;
    QVector<QBluetoothServiceInfo> m_vectorBluetoothService;
    QString m_idCurrentBluetoothDevice;

private slots:
    void onBluetoothDeviceDiscovered(const QBluetoothDeviceInfo &info);
    void onBluetoothServiceDiscovered(const QBluetoothServiceInfo &info);
    void onBluetoothStateChanged(const QLowEnergyController::ControllerState &state);
    void onBluetoothConnected();
    void onBluetoothDisconnected();
    void onBluetoothError(QLowEnergyController::Error error);
    void onBleServiceDiscovered(const QBluetoothUuid &newService);
    void onBluetoothLowEnergyControllerStateChanged(QLowEnergyService::ServiceState newState);
    void onBluetoothLowEnergyControllerCharacteristicChanged(const QLowEnergyCharacteristic &characteristic, const QByteArray &newValue);
    void onBluetoothLowEnergyControllerCharacteristicWritten(const QLowEnergyCharacteristic &characteristic, const QByteArray &newValue);
    void onBluetoothLowEnergyControllerDescriptorWritten(const QLowEnergyDescriptor &descriptor, const QByteArray &newValue);
    void onBluetoothLowEnergyControllerCharacteristicRead(const QLowEnergyCharacteristic &characteristic, const QByteArray &value);
    void onBluetoothLowEnergyControllerDescriptorRead(const QLowEnergyDescriptor &descriptor, const QByteArray &value);
    void getStateBluetooth();

    void setSpeed(int value);

    int byteArrayToInt(QByteArray arr);
};

#endif // BLUETOOTH_H

In main class I add Bluetooth to Q_PROPERTY:

Q_PROPERTY(Bluetooth bluetooth   MEMBER m_bluetooth NOTIFY bluetoothChanged)

In Bluetooth i emit signal:

        setProperty("speed", m_speed);
        emit speedChanged(m_speed);

But in QML I dont get this signal:


    Connections {
        target: AppCore.bluetooth

        function onSpeedChanged(speed) {
            console.log("*********************************", speed)
      }

Mihaill

Iadd in main and then it worked:

qRegisterMetaType<Bluetooth>("Bluetooth");
and
engine.rootContext()->setContextProperty("bluetooth", &appCore->m_bluetooth);