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Segmentation Fault beim beenden

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  • M Offline
    M Offline
    msauer75
    wrote on last edited by
    #1

    Hallo,

    ich bin gerade dabei ein Qt Programm und einer Oberfläche mit QWidgets zu erstellen. Ich habe jetzt alle Elemente platziert und ein Beenden Button angelegt, diesen mittels connect dem close() SLOT verbunden. Beim beenden bekomme ich allerdings jetzt einen Segmentation Fault. Hat einer eine Idee wo der herkommt?

    MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
    {
        font14pxB.setPixelSize(14);
        font14pxB.setBold(true);
        font9px.setPixelSize(9);
    
        if (this->objectName().isEmpty())
            this->setObjectName(QStringLiteral("MainWindow"));
    
        this->resize(800, 480);
        this->setMaximumSize(800, 480);
        this->setMinimumSize(800, 480);
    
        QSizePolicy sizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
        this->setSizePolicy(sizePolicy);
    
        centralWidget = new QWidget(this);
        centralWidget->setObjectName(QStringLiteral("centralwidget"));
    
        verticalLayoutWidget = new QWidget(centralWidget);
        verticalLayoutWidget->setObjectName(QStringLiteral("verticalLayoutWidget"));
        verticalLayoutWidget->setGeometry(0, 0, 800, 480);
    
        verticalLayout = new QVBoxLayout(verticalLayoutWidget);
        verticalLayout->setSpacing(5);
        verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
    
        labelTitel = new QLabel(verticalLayoutWidget);
        labelTitel->setObjectName(QStringLiteral("labelTitel"));
        labelTitel->setFont(font14pxB);
        labelTitel->setAlignment(Qt::AlignCenter);
        labelTitel->setText(QString("Geocache Verwaltung"));
        labelVersion = new QLabel(this);
        labelVersion->setText(QString("(c) by Saver Soft - Sauer, 2017, Version 1.0"));
        labelVersion->setFont(font9px);
    
        pB_Beenden = new QPushButton(verticalLayoutWidget);
        pB_Beenden->setObjectName(QStringLiteral("pB_Beenden"));
        pB_Beenden->setText(QString("&Beenden"));
        pB_Admin = new QPushButton(verticalLayoutWidget);
        pB_Admin->setObjectName(QStringLiteral("pB_Beenden"));
        pB_Admin->setText(QString("&Admin"));
        pB_GCListe = new QPushButton(verticalLayoutWidget);
        pB_GCListe->setObjectName(QStringLiteral("pB_GCListe"));
        pB_GCListe->setText(QString("GC Liste"));
        pB_Helper = new QPushButton(verticalLayoutWidget);
        pB_Helper->setObjectName(QStringLiteral("pB_Helper"));
        pB_Helper->setText(QString("Hilfstabellen"));
        pB_GCEdit = new QPushButton(verticalLayoutWidget);
        pB_GCEdit->setObjectName(QStringLiteral("pB_GCEdit"));
        pB_GCEdit->setText(QString("GC Bearbeiten"));
    
        vSp_10 = new QSpacerItem(5, 10, QSizePolicy::Minimum, QSizePolicy::Expanding);
        vSp_20 = new QSpacerItem(5, 20, QSizePolicy::Minimum, QSizePolicy::Expanding);
        vSp_50 = new QSpacerItem(5, 50, QSizePolicy::Minimum, QSizePolicy::Expanding);
        hSp_10 = new QSpacerItem(10, 5, QSizePolicy::Minimum, QSizePolicy::Expanding);
        hSp_20 = new QSpacerItem(20, 5, QSizePolicy::Minimum, QSizePolicy::Expanding);
    
        gridLayout = new QGridLayout();
        gridLayout->setObjectName(QStringLiteral("gridLayout"));
        gridLayout->addItem(hSp_10, 1, 1, 1, 1);
        gridLayout->addWidget(pB_GCListe, 1, 2, 1, 1);
        gridLayout->addItem(hSp_20, 1, 3, 1, 1);
        gridLayout->addWidget(pB_GCEdit, 1, 4, 1, 1);
        gridLayout->addItem(hSp_20, 1, 5, 1, 3);
        gridLayout->addItem(vSp_10, 2, 1, 1, 7);
        gridLayout->addItem(hSp_10, 3, 1, 1, 1);
        gridLayout->addWidget(pB_Admin, 3, 2, 1, 1);
        gridLayout->addItem(hSp_20, 3, 3, 1, 1);
        gridLayout->addWidget(pB_Helper, 3, 4, 1, 1);
        gridLayout->addItem(hSp_20, 3, 5, 1, 1);
        gridLayout->addWidget(pB_Beenden, 3, 6, 1, 1);
        gridLayout->addItem(hSp_10, 3, 7, 1, 1);
        gridLayout->addItem(hSp_10, 4, 1, 1, 1);
        gridLayout->setRowStretch(4,1);
    
        verticalLayout->addItem(vSp_10);
        verticalLayout->addWidget(labelTitel);
        verticalLayout->addItem(vSp_50);
        verticalLayout->addLayout(gridLayout);
        verticalLayout->setStretch(3, 1);
    
        statusBar = new QStatusBar(this);
        statusBar->addPermanentWidget(labelVersion);
    
        this->setCentralWidget(centralWidget);
        this->setWindowTitle(QString("Geocache Verwaltung"));
        this->setStatusBar(statusBar);
    
        QObject::connect(pB_Beenden, SIGNAL(clicked(bool)), this, SLOT(close()));
    }
    

    Danke schonmal für Eure Hilfe.

    gruss

    martin

    jsulmJ J.HilkJ 2 Replies Last reply
    0
    • M msauer75

      Hallo,

      ich bin gerade dabei ein Qt Programm und einer Oberfläche mit QWidgets zu erstellen. Ich habe jetzt alle Elemente platziert und ein Beenden Button angelegt, diesen mittels connect dem close() SLOT verbunden. Beim beenden bekomme ich allerdings jetzt einen Segmentation Fault. Hat einer eine Idee wo der herkommt?

      MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
      {
          font14pxB.setPixelSize(14);
          font14pxB.setBold(true);
          font9px.setPixelSize(9);
      
          if (this->objectName().isEmpty())
              this->setObjectName(QStringLiteral("MainWindow"));
      
          this->resize(800, 480);
          this->setMaximumSize(800, 480);
          this->setMinimumSize(800, 480);
      
          QSizePolicy sizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
          this->setSizePolicy(sizePolicy);
      
          centralWidget = new QWidget(this);
          centralWidget->setObjectName(QStringLiteral("centralwidget"));
      
          verticalLayoutWidget = new QWidget(centralWidget);
          verticalLayoutWidget->setObjectName(QStringLiteral("verticalLayoutWidget"));
          verticalLayoutWidget->setGeometry(0, 0, 800, 480);
      
          verticalLayout = new QVBoxLayout(verticalLayoutWidget);
          verticalLayout->setSpacing(5);
          verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
      
          labelTitel = new QLabel(verticalLayoutWidget);
          labelTitel->setObjectName(QStringLiteral("labelTitel"));
          labelTitel->setFont(font14pxB);
          labelTitel->setAlignment(Qt::AlignCenter);
          labelTitel->setText(QString("Geocache Verwaltung"));
          labelVersion = new QLabel(this);
          labelVersion->setText(QString("(c) by Saver Soft - Sauer, 2017, Version 1.0"));
          labelVersion->setFont(font9px);
      
          pB_Beenden = new QPushButton(verticalLayoutWidget);
          pB_Beenden->setObjectName(QStringLiteral("pB_Beenden"));
          pB_Beenden->setText(QString("&Beenden"));
          pB_Admin = new QPushButton(verticalLayoutWidget);
          pB_Admin->setObjectName(QStringLiteral("pB_Beenden"));
          pB_Admin->setText(QString("&Admin"));
          pB_GCListe = new QPushButton(verticalLayoutWidget);
          pB_GCListe->setObjectName(QStringLiteral("pB_GCListe"));
          pB_GCListe->setText(QString("GC Liste"));
          pB_Helper = new QPushButton(verticalLayoutWidget);
          pB_Helper->setObjectName(QStringLiteral("pB_Helper"));
          pB_Helper->setText(QString("Hilfstabellen"));
          pB_GCEdit = new QPushButton(verticalLayoutWidget);
          pB_GCEdit->setObjectName(QStringLiteral("pB_GCEdit"));
          pB_GCEdit->setText(QString("GC Bearbeiten"));
      
          vSp_10 = new QSpacerItem(5, 10, QSizePolicy::Minimum, QSizePolicy::Expanding);
          vSp_20 = new QSpacerItem(5, 20, QSizePolicy::Minimum, QSizePolicy::Expanding);
          vSp_50 = new QSpacerItem(5, 50, QSizePolicy::Minimum, QSizePolicy::Expanding);
          hSp_10 = new QSpacerItem(10, 5, QSizePolicy::Minimum, QSizePolicy::Expanding);
          hSp_20 = new QSpacerItem(20, 5, QSizePolicy::Minimum, QSizePolicy::Expanding);
      
          gridLayout = new QGridLayout();
          gridLayout->setObjectName(QStringLiteral("gridLayout"));
          gridLayout->addItem(hSp_10, 1, 1, 1, 1);
          gridLayout->addWidget(pB_GCListe, 1, 2, 1, 1);
          gridLayout->addItem(hSp_20, 1, 3, 1, 1);
          gridLayout->addWidget(pB_GCEdit, 1, 4, 1, 1);
          gridLayout->addItem(hSp_20, 1, 5, 1, 3);
          gridLayout->addItem(vSp_10, 2, 1, 1, 7);
          gridLayout->addItem(hSp_10, 3, 1, 1, 1);
          gridLayout->addWidget(pB_Admin, 3, 2, 1, 1);
          gridLayout->addItem(hSp_20, 3, 3, 1, 1);
          gridLayout->addWidget(pB_Helper, 3, 4, 1, 1);
          gridLayout->addItem(hSp_20, 3, 5, 1, 1);
          gridLayout->addWidget(pB_Beenden, 3, 6, 1, 1);
          gridLayout->addItem(hSp_10, 3, 7, 1, 1);
          gridLayout->addItem(hSp_10, 4, 1, 1, 1);
          gridLayout->setRowStretch(4,1);
      
          verticalLayout->addItem(vSp_10);
          verticalLayout->addWidget(labelTitel);
          verticalLayout->addItem(vSp_50);
          verticalLayout->addLayout(gridLayout);
          verticalLayout->setStretch(3, 1);
      
          statusBar = new QStatusBar(this);
          statusBar->addPermanentWidget(labelVersion);
      
          this->setCentralWidget(centralWidget);
          this->setWindowTitle(QString("Geocache Verwaltung"));
          this->setStatusBar(statusBar);
      
          QObject::connect(pB_Beenden, SIGNAL(clicked(bool)), this, SLOT(close()));
      }
      

      Danke schonmal für Eure Hilfe.

      gruss

      martin

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #2

      @msauer75 Stacktrace könnte helfen. Machst du irgendwas im Destructor?

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      0
      • M msauer75

        Hallo,

        ich bin gerade dabei ein Qt Programm und einer Oberfläche mit QWidgets zu erstellen. Ich habe jetzt alle Elemente platziert und ein Beenden Button angelegt, diesen mittels connect dem close() SLOT verbunden. Beim beenden bekomme ich allerdings jetzt einen Segmentation Fault. Hat einer eine Idee wo der herkommt?

        MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
        {
            font14pxB.setPixelSize(14);
            font14pxB.setBold(true);
            font9px.setPixelSize(9);
        
            if (this->objectName().isEmpty())
                this->setObjectName(QStringLiteral("MainWindow"));
        
            this->resize(800, 480);
            this->setMaximumSize(800, 480);
            this->setMinimumSize(800, 480);
        
            QSizePolicy sizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
            this->setSizePolicy(sizePolicy);
        
            centralWidget = new QWidget(this);
            centralWidget->setObjectName(QStringLiteral("centralwidget"));
        
            verticalLayoutWidget = new QWidget(centralWidget);
            verticalLayoutWidget->setObjectName(QStringLiteral("verticalLayoutWidget"));
            verticalLayoutWidget->setGeometry(0, 0, 800, 480);
        
            verticalLayout = new QVBoxLayout(verticalLayoutWidget);
            verticalLayout->setSpacing(5);
            verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
        
            labelTitel = new QLabel(verticalLayoutWidget);
            labelTitel->setObjectName(QStringLiteral("labelTitel"));
            labelTitel->setFont(font14pxB);
            labelTitel->setAlignment(Qt::AlignCenter);
            labelTitel->setText(QString("Geocache Verwaltung"));
            labelVersion = new QLabel(this);
            labelVersion->setText(QString("(c) by Saver Soft - Sauer, 2017, Version 1.0"));
            labelVersion->setFont(font9px);
        
            pB_Beenden = new QPushButton(verticalLayoutWidget);
            pB_Beenden->setObjectName(QStringLiteral("pB_Beenden"));
            pB_Beenden->setText(QString("&Beenden"));
            pB_Admin = new QPushButton(verticalLayoutWidget);
            pB_Admin->setObjectName(QStringLiteral("pB_Beenden"));
            pB_Admin->setText(QString("&Admin"));
            pB_GCListe = new QPushButton(verticalLayoutWidget);
            pB_GCListe->setObjectName(QStringLiteral("pB_GCListe"));
            pB_GCListe->setText(QString("GC Liste"));
            pB_Helper = new QPushButton(verticalLayoutWidget);
            pB_Helper->setObjectName(QStringLiteral("pB_Helper"));
            pB_Helper->setText(QString("Hilfstabellen"));
            pB_GCEdit = new QPushButton(verticalLayoutWidget);
            pB_GCEdit->setObjectName(QStringLiteral("pB_GCEdit"));
            pB_GCEdit->setText(QString("GC Bearbeiten"));
        
            vSp_10 = new QSpacerItem(5, 10, QSizePolicy::Minimum, QSizePolicy::Expanding);
            vSp_20 = new QSpacerItem(5, 20, QSizePolicy::Minimum, QSizePolicy::Expanding);
            vSp_50 = new QSpacerItem(5, 50, QSizePolicy::Minimum, QSizePolicy::Expanding);
            hSp_10 = new QSpacerItem(10, 5, QSizePolicy::Minimum, QSizePolicy::Expanding);
            hSp_20 = new QSpacerItem(20, 5, QSizePolicy::Minimum, QSizePolicy::Expanding);
        
            gridLayout = new QGridLayout();
            gridLayout->setObjectName(QStringLiteral("gridLayout"));
            gridLayout->addItem(hSp_10, 1, 1, 1, 1);
            gridLayout->addWidget(pB_GCListe, 1, 2, 1, 1);
            gridLayout->addItem(hSp_20, 1, 3, 1, 1);
            gridLayout->addWidget(pB_GCEdit, 1, 4, 1, 1);
            gridLayout->addItem(hSp_20, 1, 5, 1, 3);
            gridLayout->addItem(vSp_10, 2, 1, 1, 7);
            gridLayout->addItem(hSp_10, 3, 1, 1, 1);
            gridLayout->addWidget(pB_Admin, 3, 2, 1, 1);
            gridLayout->addItem(hSp_20, 3, 3, 1, 1);
            gridLayout->addWidget(pB_Helper, 3, 4, 1, 1);
            gridLayout->addItem(hSp_20, 3, 5, 1, 1);
            gridLayout->addWidget(pB_Beenden, 3, 6, 1, 1);
            gridLayout->addItem(hSp_10, 3, 7, 1, 1);
            gridLayout->addItem(hSp_10, 4, 1, 1, 1);
            gridLayout->setRowStretch(4,1);
        
            verticalLayout->addItem(vSp_10);
            verticalLayout->addWidget(labelTitel);
            verticalLayout->addItem(vSp_50);
            verticalLayout->addLayout(gridLayout);
            verticalLayout->setStretch(3, 1);
        
            statusBar = new QStatusBar(this);
            statusBar->addPermanentWidget(labelVersion);
        
            this->setCentralWidget(centralWidget);
            this->setWindowTitle(QString("Geocache Verwaltung"));
            this->setStatusBar(statusBar);
        
            QObject::connect(pB_Beenden, SIGNAL(clicked(bool)), this, SLOT(close()));
        }
        

        Danke schonmal für Eure Hilfe.

        gruss

        martin

        J.HilkJ Online
        J.HilkJ Online
        J.Hilk
        Moderators
        wrote on last edited by
        #3

        @msauer75 hi, normalerweise verbindet man den eigenen "close" button nicht mit QWidget::Close <- das schließt nämlich nur das widget. Was aber nicht bedeutet dass das Programm auch beendet wird.

        ich würde das hier empfehlen:

        connect(pB_Beenden, &QPushButton::clicked, qApp, &QApplication::quit);
        

        zum Segfault, mehr infos pls. Wie @jsulm schon sagte ;-)


        Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


        Q: What's that?
        A: It's blue light.
        Q: What does it do?
        A: It turns blue.

        1 Reply Last reply
        0
        • M Offline
          M Offline
          msauer75
          wrote on last edited by
          #4

          Hallo,

          es lag an den Spacer Items im GridLayout. Hier hatte ich mehrmals das selbe Item übergeben.

          gruss
          martin

          1 Reply Last reply
          0

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