Emitting multiple signals from the same onTriggered

[rscr]

Hi,

I am having problems to emit 2 signals from the same custom QML Type. I want to run periodically check_conf(), and emit 1, 2 or none signals depending of check_ipConf() and check_gateway().

The problem is that I am showing the ip and gateway values in two TextFields, and I have always updated the 2nd one (gateway value). The firs one related with the ip value never gets updated.

I have the next code:

main.qml

Timer{
            interval: 1000; running: true; repeat:true
            onTriggered: cp4Conf.check_conf()
        }

        QTcp4Conf{
            id: cp4Conf
            onIpChanged: stateGroup.state = 'State1'
            onGatewayChanged : stateGroup.state = 'State2'
         }

                State{
                    name: "State1"

                    PropertyChanges {
                        target: page.textIP
                        text: cp4Conf.ip

                    }
                },

                State{
                    name: "State2"

                    PropertyChanges {
                        target: page.textGateway
                        text: cp4Conf.gateway

                    }
                }

QTcp4Conf.cpp

void QTcp4Conf::check_conf(){

    QString ipValue, gatewayValue;


    open_conf(ipValue,gatewayValue);

    check_ipConf(ipValue);
    check_gatewayConf(gatewayValue);
}


void QTcp4Conf::open_conf(QString& ipValue, QString& gatewayValue){


    QSettings fileConf("C:/Data/conf.conf",QSettings::IniFormat);


    ipValue = fileConf.value("static ip_address").toString();
    gatewayValue = fileConf.value("static routers").toString();


}


void QTcp4Conf::check_ipConf(QString ipValue){

    if(m_ip == ipValue){
        return;
    }

    m_ip = ipValue;

    emit ipChanged(m_ip);
}

void QTcp4Conf::check_gatewayConf(QString gatewayValue){

    if(m_gateway == gatewayValue){
        return;
    }

    m_gateway = gatewayValue;

    emit gatewayChanged(m_gateway);

}

QString QTcp4Conf::ip(){
  return m_ip;
}

QString QTcp4Conf::gateway(){
    return m_gateway;
}

Maybe I can't use this approach?

Kind regards,

Rafa

[SGaist]

Hi,

Can you show your class definition ?
Are you sure that signals are emitted ?

[JKSH]

@rscr said in Emitting multiple signals from the same onTriggered:

The problem is that I am showing the ip and gateway values in two TextFields

Please post the code that shows how you connect your TextFields.

[rscr]

Hi,

QTcp4Conf.h

#ifndef QTCP4CONF_H
#define QTCP4CONF_H


#include <QObject>
#include <QDebug>

class QTcp4Conf : public QObject{

    Q_OBJECT



    Q_PROPERTY(QString ip
               READ ip
               NOTIFY ipChanged)

    Q_PROPERTY(QString gateway
               READ gateway
               NOTIFY gatewayChanged)

public:

    explicit QTcp4Conf(QObject *parent = nullptr);


     Q_INVOKABLE void check_conf();


    QString ip();
    QString gateway();

    /**
     * @brief open_conf : Abrir archivo de configuracion (.conf)
     * @param ipValue   : Valor IP extraido del .conf
     * @param gatewayValue : Valor gateway extraido del .conf
     */
    void open_conf(QString& ipValue,QString& gatewayValue);

    /**
     * @brief check_ipConf : Comprobar si IP ha cambiado, en ese caso, lanzar aviso
     * @param ipValue      : Valor IP extraído del .conf
     */
    void check_ipConf(QString ipValue);

    /**
     * @brief check_gatewayConf : Comprobar si gateway ha cambiado, en ese caso, lanzar aviso
     * @param gatewayValue      : Valor gateway extraído del .conf
     */
    void check_gatewayConf(QString gatewayValue);

signals:

    void ipChanged(QString ip);
    void gatewayChanged(QString gateway);

private:
    QString m_ip;
    QString m_gateway;

};


#endif // QTCP4CONF_H

QTcp4Conf.cpp

#include "QTcp4Conf.h"
#include <QSettings>



QTcp4Conf::QTcp4Conf(QObject *parent):QObject(parent){
    m_ip = "";
    m_gateway = "";
}


void QTcp4Conf::check_conf(){

    QString ipValue, gatewayValue;


    open_conf(ipValue,gatewayValue);

    check_ipConf(ipValue);
    check_gatewayConf(gatewayValue);
}


void QTcp4Conf::open_conf(QString& ipValue, QString& gatewayValue){


    QSettings fileConf("C:/Data/conf.conf",QSettings::IniFormat);


    ipValue = fileConf.value("static ip_address").toString();
    gatewayValue = fileConf.value("static routers").toString();


}


void QTcp4Conf::check_ipConf(QString ipValue){

    if(m_ip == ipValue){
        return;
    }

    m_ip = ipValue;

    emit ipChanged(m_ip);
}

void QTcp4Conf::check_gatewayConf(QString gatewayValue){

    if(m_gateway == gatewayValue){
        return;
    }

    m_gateway = gatewayValue;

    emit gatewayChanged(m_gateway);

}


QString QTcp4Conf::ip(){
  return m_ip;
}

QString QTcp4Conf::gateway(){
    return m_gateway;
}

main.qml

ApplicationWindow {
    visible: true
    width: 800
    height: 480
    title: qsTr("Tabs")


    SwipeView {
        id: swipeView
        width: 800
        anchors.fill: parent


        Timer{
            interval: 1000; running: true; repeat:true
            onTriggered: cp4Conf.check_conf()
        }


        // Configuracion de red de la RPI
        QTcp4Conf{
            id: cp4Conf
            onIpChanged: stateGroup.state = 'State1'
            onGatewayChanged : stateGroup.state = 'State2'
         }

        Page1Form {
            id:page
        }

        Page2Form {
            id:page2
        }



        StateGroup {
            id: stateGroup
            states: [

                State{
                    name: "State1"

                    PropertyChanges {
                        target: page.textIP
                        text: cp4Conf.ip

                    }
                },

                State{
                    name: "State2"

                    PropertyChanges {
                        target: page.textGateway
                        text: cp4Conf.gateway

                    }
                }

            ]

        }

    }


    PageIndicator{
        id: indicator

        count: swipeView.count
        currentIndex: swipeView.currentIndex

        anchors.bottom: swipeView.bottom
        anchors.horizontalCenter: parent.horizontalCenter
    }
}

That's all my code

Kind Regards

[rscr]

Hi,

Can you show your class definition ?
Are you sure that signals are emitted ?

If I have this in main.qml

onIpChanged: stateGroup.state = 'State1'
//onGatewayChanged : stateGroup.state = 'State2'

The "textIP" TextField shows the desired value, so the ipChanged() is emited.

If I have:

onIpChanged: stateGroup.state = 'State1'
onGatewayChanged : stateGroup.state = 'State2'

Only the "textGateway" TextField is working

Any idea?

[JKSH]

@rscr said in Emitting multiple signals from the same onTriggered:

If I have this in main.qml

onIpChanged: stateGroup.state = 'State1'
//onGatewayChanged : stateGroup.state = 'State2'

The "textIP" TextField shows the desired value, so the ipChanged() is emited.

If I have:

onIpChanged: stateGroup.state = 'State1'
onGatewayChanged : stateGroup.state = 'State2'

Only the "textGateway" TextField is working

Both of your signals are emitted.

However, you cannot use a StateGroup to change your text like that. When it enters State1, then textGateway changes back to the default value. When it enters State2, then textIP changes back to the default value.

Just update the text directly in the onIpChanged and onGatewayChanged signal handlers:

QTcp4Conf {
    id: cp4Conf
    onIpChanged: page.textIP.text = cp4Conf.ip
    onGatewayChanged : page.textGateway.text = cp4Conf.gateway
}

[rscr]

Thanks, that is working

Kind Regards