QObject :: connect: Böyle bir sinyal ilerleme çubuğu yok V: keyReleaseEvent()

Question

Bir QProgressBar oluşturan bir progressbarV sınıfına sahip olduğum bir proje oluşturmaya çalışıyorum. Bu sınıfı ana penceremde arıyorum. Amacım, progress çubuğuna tıkladığımda başka bir ekrana geçmek. Bu amaç için KeyRleaseEvent uygulamasını denedim, ancak ne yaparsam yapayım, "QObject :: connect: Böyle bir sinyal progressbarV :: keyReleaseEvent()" hatası alıyorum. Bu sorunu çözmek için alabileceğim herhangi bir yardımı çok takdir ediyorum. QT eski bağlantı stilini kullanarak kendisine bağlanabilmek

Please find my code below:- 

mainwindow.h 
    #ifndef MAINWINDOW_H 
    #define MAINWINDOW_H 

    #include <QMainWindow> 
    #include <QWidget> 
    #include <QProgressBar> 
    #include <QLabel> 
    #include <QPixmap> 
    #include <QPushButton> 
    #include <QtWidgets> 
    #include <QProcess> 

    #include "headerfiles/progressbarV.h" 
    #include "headerfiles/redzonesettingsscreen.h" 

    class progressbarH; 

    class redZoneSettingsScreen; 

    class MainWindow : public QMainWindow//,public QProcess 
    { 
     Q_OBJECT 

    private: 
     progressbarV *progressbar_V_left; 

    public: 
     MainWindow(); 
     ~MainWindow(); 

     void GetObjects(redZoneSettingsScreen *); 

    private slots: 
     void handleSettingsButtonPressed(); 

    /*protected: 
     virtual void keyReleaseEvent(QKeyEvent *); //Q_DECL_OVERRIDE;*/ 
    }; 

    #endif // MAINWINDOW_H 

mainwindow.cpp 

    #include "headerfiles/mainwindow.h" 

    redZoneSettingsScreen *gotoSettingsScreen; 

    MainWindow::MainWindow() 
    { 
     progressbar_V_left = new progressbarV; 
     progressbar_V_left->setParent(this); 
     progressbar_V_left->setGeometry(350,200,90,450); 
     progressbar_V_left->setTitle("Height"); 
     progressbar_V_left->setData(labelCurHeight->getDataValue()); 
     progressbar_V_left->setMinVal(0); 
     progressbar_V_left->setMaxVal(labelMaxHeight->getDataValue()); 
     connect(progressbar_V_left, SIGNAL (keyReleaseEvent()), this, SLOT 
      (handleSettingsButtonPressed())); 
    } 

    MainWindow::~MainWindow() 
    { 
     delete progressbar_V_left; 
    } 

    void MainWindow::GetObjects(redZoneSettingsScreen *button) 
    { 
     gotoSettingsScreen = button; 
    } 

    void MainWindow::handleSettingsButtonPressed() 
    { 
     gotoSettingsScreen->hide(); 
     gotoSettingsScreen->show(); 
     this->hide(); 
    } 

    /*void MainWindow::keyReleaseEvent(QKeyEvent *event) 
    { 

    }*/ 

progressbarV.h 

    #ifndef PROGRESSBARV_H 
    #define PROGRESSBARV_H 

    #include <QWidget> 
    #include <QProgressBar> 
    #include <QLabel> 
    #include <QPixmap> 

    class progressbarV: public QWidget 
    { 
     Q_OBJECT 

    private: 
     QProgressBar *progressbar_V; 
     QLabel *labelRedDanger, *labelYellowWarning; 
     float maxScaledHeight, redZoneScaledHeight, yellowZoneScaledHeight; 

     int spn, spn_value; 
     QString title; 
     int data; 
     short minVal; 
     short maxVal; 

    public: 
     progressbarV(); 
     ~progressbarV(); 

     void setSPN(int); 
     int getSPN(); 

     void setSPN_Value(int); 
     int getSPN_Value(); 

     void setTitle(QString); 
     QString getTitle(); 

     void setData(int); 
     int getData(); 

     void setMinVal(short); 
     short getMinVal(); 

     void setMaxVal(short); 
     short getMaxVal(); 

     /*void setLowError(short); 
     short getLowError(); 

     void setLowWarning(short); 
     short getLowWarning(); 

     void setHighError(short); 
     short getHighError(); 

     void setHighWarning(short); 
     short getHighWarning();*/ 

     QProgressBar* getProgressBarV(); 

    protected: 
     void keyReleaseEvent(QKeyEvent *); //Q_DECL_OVERRIDE; 

    }; 
    #endif // PROGRESSBARH_H 

progressbarV.cpp 

    #include "headerfiles/progressbarV.h" 

    progressbarV::progressbarV() 
    { 
     progressbar_V = new QProgressBar; 
     progressbar_V->setParent(this); 
     progressbar_V->setStyleSheet("QProgressBar{ border: solid grey; border- 
      width: 6; border-radius: 12; text-align: center;},  
     QProgressBar::chunk{background-color: limegreen; width: 0px; margin: 
      0px;}"); 
     progressbar_V->setGeometry(2,0,50,200); 
     progressbar_V->setOrientation(Qt::Vertical); 

     maxScaledHeight = (200*100)/120; 
     redZoneScaledHeight = 200 - ((maxScaledHeight*105)/100); 
     yellowZoneScaledHeight = 200 - ((maxScaledHeight*90)/100); 

     QPixmap mypixRed(":/images/images/redZone.png"); 
     labelRedDanger = new QLabel; 
     labelRedDanger->setParent(this); 
     labelRedDanger->setGeometry(8,redZoneScaledHeight,38,3); 
     labelRedDanger->setPixmap(mypixRed); 

     QPixmap mypixYellow(":/images/images/yellowZone.png"); 
     labelYellowWarning = new QLabel; 
     labelYellowWarning->setParent(this); 
     labelYellowWarning->setGeometry(8,yellowZoneScaledHeight,38,3); 
     labelYellowWarning->setPixmap(mypixYellow); 
    } 

    progressbarV::~progressbarV() 
    { 
     delete progressbar_V; 
     delete labelRedDanger; 
     delete labelYellowWarning; 
    } 

    void progressbarV::setSPN(int val) 
    { 
     spn = val; 
    } 

    int progressbarV::getSPN() 
    { 
     return spn; 
    } 

    void progressbarV::setSPN_Value(int val) 
    { 
     spn_value = val; 
    } 

    int progressbarV::getSPN_Value() 
    { 
     return spn_value; 
    } 

    void progressbarV::setTitle(QString mTitle) 
    { 
     title = mTitle; 
    } 

    QString progressbarV::getTitle() 
    { 
     return title; 
    } 

    void progressbarV::setData(int mData) 
    { 
     data = mData; 
     progressbar_V->setValue(data); 
    } 

    int progressbarV::getData() 
    { 
     return data; 
    } 

    void progressbarV::setMinVal(short mMinVal) 
    { 
     minVal = mMinVal; 
     progressbar_V->setMinimum(minVal); 
    } 

    short progressbarV::getMinVal() 
    { 
     return minVal; 
    } 

    void progressbarV::setMaxVal(short mMaxVal) 
    { 
     maxVal = mMaxVal; 
     progressbar_V->setMaximum(maxVal); 
    } 

    short progressbarV::getMaxVal() 
    { 
     return maxVal; 
    } 

    QProgressBar *progressbarV::getProgressBarV() 
    { 
     return progressbar_V; 
    } 

    void progressbarV::keyReleaseEvent(QKeyEvent *event) 
    { 

    } 

Since I am new to QT, kindly give me solutions in the form of code snippets 

Thanks in advance, 
Sam 

Answer 1

Bir ortak YUVASı

public slots: 
    void keyReleaseEvent(QKeyEvent *); //Q_DECL_OVERRIDE; 

olarak keyReleaseEvent ilan etmek gerekir.