Assigning ItemDelegates to different columns in a view

[VRonin]

Could you post your stacktrace?

[gabor53]

@VRonin
Yes.
1 myDelegate::createEditor mydelegate.cpp 16 0x41c31f
2 QAbstractItemViewPrivate::editor qabstractitemview.cpp 4199 0x14f94af1
3 QAbstractItemViewPrivate::openEditor qabstractitemview.cpp 4384 0x14f95895
4 QAbstractItemView::edit qabstractitemview.cpp 2676 0x14f8fa8e
5 QAbstractItemView::edit qabstractitemview.cpp 1201 0x14f8acf5
6 QAbstractItemView::closeEditor qabstractitemview.cpp 2852 0x14f904de
7 QAbstractItemView::qt_static_metacall moc_qabstractitemview.cpp 421 0x14f964de
8 QMetaObject::activate qobject.cpp 3740 0x1cb5782
9 QMetaObject::activate qobject.cpp 3602 0x1cb50a2
10 QAbstractItemDelegate::closeEditor moc_qabstractitemdelegate.cpp 204 0x14fcec46
11 QAbstractItemDelegatePrivate::editorEventFilter qabstractitemdelegate.cpp 477 0x14fcdf28
12 QStyledItemDelegate::eventFilter qstyleditemdelegate.cpp 583 0x14ff872d
13 QCoreApplicationPrivate::sendThroughObjectEventFilters qcoreapplication.cpp 1099 0x1c8ca0e
14 QApplicationPrivate::notify_helper qapplication.cpp 3795 0x14d2fb50
15 QApplication::notify qapplication.cpp 3181 0x14d2d24c
16 QCoreApplication::notifyInternal2 qcoreapplication.cpp 988 0x1c8c6e7
17 QCoreApplication::sendSpontaneousEvent qcoreapplication.h 234 0x150ac865
18 QWidgetWindow::handleKeyEvent qwidgetwindow.cpp 656 0x14d7fe17
19 QWidgetWindow::event qwidgetwindow.cpp 232 0x14d7e741
20 QApplicationPrivate::notify_helper qapplication.cpp 3799 0x14d2fb70
21 QApplication::notify qapplication.cpp 3159 0x14d2d143
22 QCoreApplication::notifyInternal2 qcoreapplication.cpp 988 0x1c8c6e7
23 QCoreApplication::sendSpontaneousEvent qcoreapplication.h 234 0x8f380ad
24 QGuiApplicationPrivate::processKeyEvent qguiapplication.cpp 2016 0x8c1c0ac
25 QGuiApplicationPrivate::processWindowSystemEvent qguiapplication.cpp 1693 0x8c1adc8
26 QWindowSystemInterface::sendWindowSystemEvents qwindowsysteminterface.cpp 659 0x8c0cee2
27 QWindowsGuiEventDispatcher::sendPostedEvents qwindowsguieventdispatcher.cpp 82 0x1f60569d
28 qt_internal_proc(HWND__ *, unsigned int, unsigned int, long) *16 qeventdispatcher_win.cpp 443 0x1cd8f6a
29 USER32!SetManipulationInputTarget 0x7466d2b3
30 USER32!DispatchMessageW 0x7464e88a
31 USER32!DispatchMessageW 0x7464e1e4
32 USER32!DispatchMessageW 0x7464dfa0
33 QEventDispatcherWin32::processEvents qeventdispatcher_win.cpp 844 0x1cda4f6
34 QWindowsGuiEventDispatcher::processEvents qwindowsguieventdispatcher.cpp 74 0x1f605659
35 QEventLoop::processEvents qeventloop.cpp 134 0x1c8a364
36 QEventLoop::exec qeventloop.cpp 212 0x1c8a614
37 QDialog::exec qdialog.cpp 552 0x14f3adfd
38 MainWindow::on_actionFix_Friend_in_DB_triggered mainwindow.cpp 211 0x408e67
39 MainWindow::qt_static_metacall moc_mainwindow.cpp 85 0x424813
40 MainWindow::qt_metacall moc_mainwindow.cpp 117 0x424906
41 QMetaObject::metacall qmetaobject.cpp 301 0x1c91322
42 QMetaObject::activate qobject.cpp 3755 0x1cb582d
43 QMetaObject::activate qobject.cpp 3602 0x1cb50a2
44 QAction::triggered moc_qaction.cpp 369 0x14d24983
45 QAction::activate qaction.cpp 1170 0x14d23c32
46 QAction::event qaction.cpp 1098 0x14d23a14
47 QApplicationPrivate::notify_helper qapplication.cpp 3799 0x14d2fb70
48 QApplication::notify qapplication.cpp 3159 0x14d2d143
49 QCoreApplication::notifyInternal2 qcoreapplication.cpp 988 0x1c8c6e7
50 QCoreApplication::sendEvent qcoreapplication.h 231 0x8f38105
51 QShortcutMap::dispatchEvent qshortcutmap.cpp 674 0x8c4763b
52 QShortcutMap::tryShortcut qshortcutmap.cpp 351 0x8c46906
53 QWindowSystemInterface::handleShortcutEvent qwindowsysteminterface.cpp 235 0x8c0b8f6
54 QGuiApplicationPrivate::processKeyEvent qguiapplication.cpp 2002 0x8c1bfc8
55 QGuiApplicationPrivate::processWindowSystemEvent qguiapplication.cpp 1693 0x8c1adc8
56 QWindowSystemInterface::sendWindowSystemEvents qwindowsysteminterface.cpp 659 0x8c0cee2
57 QWindowsGuiEventDispatcher::sendPostedEvents qwindowsguieventdispatcher.cpp 82 0x1f60569d
58 qt_internal_proc(HWND__ *, unsigned int, unsigned int, long) *16 qeventdispatcher_win.cpp 443 0x1cd8f6a
59 USER32!SetManipulationInputTarget 0x7466d2b3
60 USER32!DispatchMessageW 0x7464e88a
61 USER32!DispatchMessageW 0x7464e1e4
62 USER32!DispatchMessageW 0x7464dfa0
63 QEventDispatcherWin32::processEvents qeventdispatcher_win.cpp 844 0x1cda4f6
64 QWindowsGuiEventDispatcher::processEvents qwindowsguieventdispatcher.cpp 74 0x1f605659
65 QEventLoop::processEvents qeventloop.cpp 134 0x1c8a364
66 QEventLoop::exec qeventloop.cpp 212 0x1c8a614
67 QCoreApplication::exec qcoreapplication.cpp 1261 0x1c8cd69
68 QGuiApplication::exec qguiapplication.cpp 1633 0x8c1ac2c
69 QApplication::exec qapplication.cpp 2975 0x14d2cc0b
70 main main.cpp 14 0x403964

[ambershark]

@gabor53 So your mydelegate class is crashing, can we see the code for that?

[VRonin]

in particular myDelegate::createEditor

[gabor53]

@VRonin
Here it is:

#include "mydelegate.h"
#include "imagepickbutton.h"
#include "imagedelegate.h"


myDelegate::myDelegate(QObject *parent):QStyledItemDelegate (parent)
{
}



QWidget *myDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    Q_UNUSED(option);

    if((index.column () == 1))
        {
            QLineEdit *editor = new QLineEdit(parent);
            editor->setFrame (true);
            editor->setStyleSheet ("background-color:rgb(255,217,229)");
            editor->resize (100,20);
            editor->sizeHint ();

//            connect(editor,&QLineEdit::editingFinished,this,&myDelegate::commitAndCloseEditor);
            return editor;
        }

    if((index.column () == 2))
        {
            QComboBox *comboEditor = new QComboBox(parent);
            comboEditor->setFrame (true);
            comboEditor->setEditable (true);
            comboEditor->setStyleSheet ("background-color:rgb(255,217,229)");

            QSqlQuery query_loadWhat ("SELECT What FROM What_Table ORDER BY What asc",db);

            while (query_loadWhat.next ())
                {
                    QString  whatItem = query_loadWhat.value (0).toString ();
                    comboEditor->addItem (whatItem);
                }

            return comboEditor;
        }



    if((index.column () == 3))//image
        {


            return new ImagePickButton(parent);

        }

    if(index.column () == 8)//Signed
        {
            QComboBox *comboSignedEdit = new QComboBox(parent);
            comboSignedEdit->setFrame (true);
            comboSignedEdit->setEditable (true);

            comboSignedEdit->setStyleSheet ("background-color:rgb(255,217,229)");
            QSqlQuery query_loadSigned ("SELECT Signedby FROM Signed_Table ORDER BY Signedby asc",db);

            while (query_loadSigned.next ())
                {
                    QString  SignedItem = query_loadSigned.value (0).toString ();
                    comboSignedEdit->addItem (SignedItem);
                }
            return comboSignedEdit;
        }

    if (index.column () == 9)//History
        {
            QTextEdit *historyEditor = new QTextEdit(parent);
            historyEditor->frameRect ();
            historyEditor->setStyleSheet ("background-color:rgb(255,217,229)");
            return historyEditor;
        }

    if(index.column () == 10) //Age
        {
            QLineEdit *editor = new QLineEdit(parent);
            editor->setFrame (true);
            editor->setStyleSheet ("background-color:rgb(255,217,229)");
            editor->resize (100,20);
            editor->sizeHint ();
            return editor;
        }


    QTextEdit *notesEditor = new QTextEdit(parent);
    notesEditor->frameRect ();
    notesEditor->setStyleSheet ("background-color:rgb(255,217,229)");

    return notesEditor;
}


void myDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
    QLineEdit *edit = qobject_cast<QLineEdit*>(editor);

    if(edit)
        {
            edit->setText (index.model ()->data (index,Qt::EditRole).toString ());
            QVariant z(index.data (Qt::DisplayRole));
            QString text;
            text = z.toString ();
            qDebug() << "edit: " << text;
            return;

        }

    QDateEdit *dateEditor = qobject_cast<QDateEdit*>(editor);
    if(dateEditor)
        {
            dateEditor->setDate (index.model ()->data (index, Qt::EditRole).toDate ());

            dateEditor->setDate (QDate::fromString (index.model()->data (index,Qt::EditRole).toString (),"MM/dd/yyyy"));

            QVariant d(index.data (Qt::EditRole));
            qDebug() << "QVariant adoption date: " << d;

            ImagePickButton* imgPick = qobject_cast<ImagePickButton*>(editor);
            Q_ASSERT(imgPick);
            imgPick->setSelectedFile(index.data(Qt::UserRole).toString());

            return;
        }







    if((index.column () == 4))//material
        {
            QComboBox *comboMaterialEdit = new QComboBox();
            comboMaterialEdit->setFrame (true);
            comboMaterialEdit->setEditable (true);
            comboMaterialEdit->setStyleSheet ("background-color:rgb(255,217,229)");

            QSqlQuery query_loadMaterial ("SELECT Material FROM MaterialTable ORDER BY Material asc",db);

            while (query_loadMaterial.next ())
                {
                    QString  whatItem = query_loadMaterial.value (0).toString ();
                    comboMaterialEdit->addItem (whatItem);
                }

            return;
        }

    if((index.column() == 5))//color
        {
            QComboBox *comboColorEdit = new QComboBox();
            comboColorEdit->setFrame (true);
            comboColorEdit->setEditable (true);
            comboColorEdit->setStyleSheet ("background-color:rgb(255,217,229)");

            QSqlQuery query_loadColor ("SELECT Color FROM ColorTable ORDER BY Color asc",db);

            while (query_loadColor.next ())
                {
                    QString  whatItem = query_loadColor.value (0).toString ();
                    comboColorEdit->addItem (whatItem);
                }

            return;
        }

    if(index.column () == 6)//Description
        {
            QTextEdit *textEditor = new QTextEdit();
            textEditor->frameRect ();
            textEditor->setStyleSheet ("background-color:rgb(255,217,229)");

            return;
        }

    if(index.column () == 7)//Date
        {
            QDateEdit *deditor = new QDateEdit();
            deditor->setDisplayFormat ("MM/dd/yyyy");
            deditor->setCalendarPopup (true);
            deditor->setStyleSheet ("background-color:rgb(255,217,229)");
//            connect(deditor,&QDateEdit::editingFinished ,this,&myDelegate::commitAndCloseEditor );

            return;
        }


    QComboBox *comboEditor = qobject_cast<QComboBox*>(editor);
    if(comboEditor)
        {
            comboEditor->setCurrentText ((index.model ()->data (index, Qt::EditRole).toString ()));
        }

    QTextEdit *textEditor = qobject_cast<QTextEdit*>(editor);
    if(textEditor)
        {
            textEditor->setText ((index.model ()->data (index, Qt::EditRole).toString ()));
        }




}

void myDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
    QSqlQuery fixquery;
    int colset = index.column ();

    switch(colset)
        {
        case 1://Name
        {
            QLineEdit *edit = qobject_cast<QLineEdit*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));

            QString fixID;
            QVariant v(updateIndex.data (Qt::DisplayRole));
            fixID = v.toString ();
            qDebug() << "FixID: " << fixID;

            model->setData (index,edit->text ());
            QVariant f(index.data(Qt::DisplayRole));
            QString modified;
            modified = f.toString ();
            qDebug() << "Modified: " << modified;

            fixquery.prepare("UPDATE Items SET Name = :Name WHERE ID = :fixID");
            fixquery.bindValue (":Name", modified);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();
            break;
        }

        case 2://What
        {
            QComboBox *comboEdit = qobject_cast<QComboBox*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));//setting index to ID

            QString fixID;
            QVariant w(updateIndex.data (Qt::DisplayRole));//getting data from index location
            fixID = w.toString (); //turning index data ID from QVariant to string
            qDebug() << "FixID: " << fixID;  //getting ID

            QString saveWhat;
            saveWhat = comboEdit->currentText ();
            model->setData (index,saveWhat);
            QVariant ws(index.data (Qt::DisplayRole));

            saveWhat = ws.toString ();
            saveWhat = saveWhat.simplified ();
            qDebug() << "saveWhat: " << saveWhat;

            fixquery.prepare("UPDATE Items SET What = :What WHERE ID = :fixID");
            fixquery.bindValue (":What", saveWhat);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();

            fixquery.prepare ("INSERT OR IGNORE INTO What_Table (What)"
                              "VALUES(:What)");
            fixquery.bindValue (":What",saveWhat);
            fixquery.exec ();
            break;
        }
        case 3: //image
        {









            break;
        }
        case 4://material
        {
            QComboBox *comboMat = qobject_cast<QComboBox*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));//setting index to ID

            QString fixID;
            QVariant w(updateIndex.data (Qt::DisplayRole));//getting data from index location
            fixID = w.toString (); //turning index data ID from QVariant to string
            qDebug() << "FixID: " << fixID;  //getting ID

            QString saveMat;
            saveMat = comboMat->currentText ();
            model->setData (index,saveMat);
            QVariant mat(index.data (Qt::DisplayRole));
            saveMat = mat.toString ();
            saveMat = saveMat.simplified ();
            qDebug() << "saveMat: " << saveMat;

            fixquery.prepare("UPDATE Items SET Material = :Material WHERE ID = :fixID");
            fixquery.bindValue (":Material", saveMat);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();

            fixquery.prepare ("INSERT OR IGNORE INTO MaterialTable (Material)"
                              "VALUES(:Material)");
            fixquery.bindValue (":Material",saveMat);
            fixquery.exec ();

            break;
        }
        case 5://color
        {
            QComboBox *comboColor = qobject_cast<QComboBox*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));//setting index to ID

            QString fixID;
            QVariant w(updateIndex.data (Qt::DisplayRole));//getting data from index location
            fixID = w.toString (); //turning index data ID from QVariant to string
            qDebug() << "FixID: " << fixID;  //getting ID

            QString saveColor;
            saveColor = comboColor->currentText ();
            model->setData (index,saveColor);
            QVariant mat(index.data (Qt::DisplayRole));
            saveColor = mat.toString ();
            saveColor = saveColor.simplified ();
            qDebug() << "saveMat: " << saveColor;

            fixquery.prepare("UPDATE Items SET Color = :Color WHERE ID = :fixID");
            fixquery.bindValue (":Color", saveColor);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();

            fixquery.prepare ("INSERT OR IGNORE INTO ColorTable (Color)"
                              "VALUES(:Color)");
            fixquery.bindValue (":Color",saveColor);
            fixquery.exec ();

            break;
        }
        case 6: //description
        {
            QTextEdit *tedit = qobject_cast<QTextEdit*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));

            QString fixID;
            QVariant v(updateIndex.data (Qt::DisplayRole));
            fixID = v.toString ();
            qDebug() << "FixID: " << fixID;

            QString descString;
            descString = tedit->toPlainText ();
            model->setData (index,descString);
            QVariant desc(index.data(Qt::DisplayRole));
            QString DescModified;
            DescModified = desc.toString ();
            qDebug() << "Description: " << DescModified;

            fixquery.prepare("UPDATE Items SET Description = :Description WHERE ID = :fixID");
            fixquery.bindValue (":Description", DescModified);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();
            break;
        }
        case 7://date
        {

            QDateEdit *dateEdit = qobject_cast<QDateEdit*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));

            QString fixID;
            QVariant v(updateIndex.data (Qt::DisplayRole));
            fixID = v.toString ();
            qDebug() << "FixID: " << fixID;

            model->setData (index,dateEdit->date ().toString ("MM/dd/yyyy"),Qt::EditRole);
            QVariant d(index.data (Qt::EditRole));
            QString modDate;
            modDate = d.toString ();
            qDebug() << "modDate: " << modDate;

            fixquery.prepare("UPDATE Items SET AdoptDate = :AdoptDate WHERE ID = :fixID");
            fixquery.bindValue (":AdoptDate", modDate);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();

            break;
        }
        case 8://Signed by
        {
            QComboBox *comboSigned = qobject_cast<QComboBox*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));//setting index to ID

            QString fixID;
            QVariant w(updateIndex.data (Qt::DisplayRole));//getting data from index location
            fixID = w.toString (); //turning index data ID from QVariant to string
            qDebug() << "FixID: " << fixID;  //getting ID

            QString saveSigned;
            saveSigned = comboSigned->currentText ();
            model->setData (index,saveSigned);
            QVariant sign(index.data (Qt::DisplayRole));
            saveSigned = sign.toString ();
            saveSigned = saveSigned.simplified ();
            qDebug() << "saveMat: " << saveSigned;

            fixquery.prepare("UPDATE Items SET Signed = :Signed WHERE ID = :fixID");
            fixquery.bindValue (":Signed", saveSigned);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();

            fixquery.prepare ("INSERT OR IGNORE INTO Signed_Table (Signedby)"
                              "VALUES(:Signedby)");
            fixquery.bindValue (":Color",saveSigned);
            fixquery.exec ();

            break;
        }
        case 9://History
        {
            QTextEdit *histEdit = qobject_cast<QTextEdit*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));

            QString fixID;
            QVariant v(updateIndex.data (Qt::DisplayRole));
            fixID = v.toString ();
            qDebug() << "FixID: " << fixID;

            QString histString;
            histString = histEdit->toPlainText ();
            model->setData (index,histString);
            QVariant hist(index.data(Qt::DisplayRole));
            QString histModified;
            histModified = hist.toString ();
            qDebug() << "History: " << histModified;
            qDebug() << "Db connection names (history):" << db.connectionName ();

            fixquery.prepare("UPDATE Items SET History = :History WHERE ID = :fixID");
            fixquery.bindValue (":History", histModified);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();
            break;
        }
        case 10://Age
        {
            QLineEdit *edit = qobject_cast<QLineEdit*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));

            QString fixID;
            QVariant v(updateIndex.data (Qt::DisplayRole));
            fixID = v.toString ();
            qDebug() << "FixID: " << fixID;

            model->setData (index,edit->text ());
            QVariant a(index.data(Qt::DisplayRole));
            QString modAge;
            modAge = a.toString ();
            qDebug() << "Modified: " << modAge;

            fixquery.prepare("UPDATE Items SET Age = :Age WHERE ID = :fixID");
            fixquery.bindValue (":Age", modAge);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();
            break;
        }
        case 11: //notes
        {
            QTextEdit *noteEdit = qobject_cast<QTextEdit*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));

            QString fixID;
            QVariant v(updateIndex.data (Qt::DisplayRole));
            fixID = v.toString ();
            qDebug() << "FixID: " << fixID;

            QString noteString;
            noteString = noteEdit->toPlainText ();
            model->setData (index,noteString);
            QVariant n(index.data(Qt::DisplayRole));
            QString noteModified;
            noteModified = n.toString ();
            qDebug() << "History: " << noteModified;

            fixquery.prepare("UPDATE Items SET Notes = :Notes WHERE ID = :fixID");
            fixquery.bindValue (":Notes", noteModified);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();
            break;

        }
        }

}

void myDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    Q_UNUSED(index);

    editor->setGeometry (option.rect);
}

QSize myDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    Q_UNUSED(option);

    QVariant value = index.data(Qt::SizeHintRole);


}

void myDelegate::commitAndCloseEditor()
{
    qDebug() << "Commit and close works!";
    QLineEdit *editor = qobject_cast<QLineEdit*>(sender());

    emit commitData(editor);
    emit closeEditor(editor);

    QDateEdit *deditor = qobject_cast<QDateEdit*>(sender ());
    emit commitData (deditor);
    emit closeEditor (deditor);

}

QByteArray myDelegate::getNewPix()
{
    {
        qDebug() << "Entered getNewPix!";
        QString sPath = "C:/";

        //    fileDialog = getOpenFileName (Q_NULLPTR,sPath);


        const QString fileName = QFileDialog::getOpenFileName(Q_NULLPTR,
                                 tr("Finding Friend's replacement Image"),sPath, tr("Image Files (*.png *.jpg *.bmp)"));


        if(fileName == "")
            {
                qDebug() << "No image was chosen.";
            }
        else
            {
                qDebug() << "Image was chosen!";
            }

        QFile file(fileName);

    }

}

QString myDelegate::getText()
{
    QString Test;
    Test = "This is a test!";
    return Test;
}

[ambershark]

@gabor53 I don't see anything obvious in the code. It looks ok.

What does the debugger say as you step through that createEditor? Is your pointer to parent ok? Not null? Points at a valid QObject? You reference index, is index.isValid() true?

Exactly what line does it crash on in the debugger?

[VRonin]

if(index.column()== inside a delegate is always bad design. could you step through with a debugger to see where it breaks? could you also post the constructor of ImagePickButton?

[gabor53]

@VRonin
I deleted the build folder and reran qmake and build. Now the program crashes and gives a SIGSEGV error when execution reaches this section of the code:

 case 4://material
        {
            QComboBox *comboMat = qobject_cast<QComboBox*>(editor);
            QModelIndex updateIndex(index.model ()->index(index.row (),0,index.parent ()));//setting index to ID

            QString fixID;
            QVariant w(updateIndex.data (Qt::DisplayRole));//getting data from index location
            fixID = w.toString (); //turning index data ID from QVariant to string
            qDebug() << "FixID: " << fixID;  //getting ID

            QString saveMat;
            saveMat = comboMat->currentText ();
            model->setData (index,saveMat);
            QVariant mat(index.data (Qt::DisplayRole));
            saveMat = mat.toString ();
            saveMat = saveMat.simplified ();
            qDebug() << "saveMat: " << saveMat;

            fixquery.prepare("UPDATE Items SET Material = :Material WHERE ID = :fixID");
            fixquery.bindValue (":Material", saveMat);
            fixquery.bindValue (":fixID",fixID);
            fixquery.exec ();

            fixquery.prepare ("INSERT OR IGNORE INTO MaterialTable (Material)"
                              "VALUES(:Material)");
            fixquery.bindValue (":Material",saveMat);
            fixquery.exec ();

            break;
        }

It stops at this line:

saveMat = comboMat->currentText ();

Where should if(index.column()== go?
Thank you.

[ambershark]

@gabor53 More than likely comboMat is invalid at that point. Either it's null or a dangling pointer. Or it was an uninitialized one.

Either way it's a bad pointer. Confirm in the debugger then dig through your code to find out why.

[Bharath_pthinks]

@dheerendra said in Assigning ItemDelegates to different columns in a view:

It is correct. I don't see any issue. Also can try not passing the this as parent to delegate. Also whether both the delegates work if you specify them individually