TextEdited set QTableView cell value

BushyAxis793 · 9 May 2023, 19:20

Hello. I have a little problem (I hope). A few days ago I added a QTableView array to my project which inherits from the QAbstractTableView. I added text placeholders. I would like that when I change a value in QLineEdit, it sets in a specific QTableView cell. I have created a summarymodel that contains everything relevant to my QTableView. Unfortunately I don't really know how to set the value from QLineEdit as a value in the table. I know it needs setData() and a dataChanged() signal.

QLineEdit

void QueriesCreator::on_quantityGeneralInformationLineEdit_textEdited(const QString &arg1)
{
    calculations.SetMaterialQuantity(ui->quantityGeneralInformationLineEdit->text().toInt());
    CalculateMaterialCostInZloty();

    summaryModel->SetSummaryQuantity(calculations.GetMaterialQuantity());
    qDebug()<<summaryModel->setData(ui->summaryDefaultTableView->model()->index(6,0),10,Qt::EditRole);

    qDebug()<<summaryModel->GetSummaryQuantity();


}

Model Settings

    summaryModel = new SummaryModel(ui->summaryDefaultTableView);
    ui->summaryDefaultTableView->setModel(summaryModel);
    ui->summaryDefaultTableView->setEditTriggers(QAbstractItemView::NoEditTriggers);
    ui->summaryDefaultTableView->setSelectionMode(QAbstractItemView::SingleSelection);
    connect(summaryModel,SIGNAL(dataChanged(QModelIndex,QModelIndex)),this,SLOT(UpdateData(QModelIndex,QModelIndex)));

summarymodel.h

#ifndef SUMMARYMODEL_H
#define SUMMARYMODEL_H

#include <QAbstractTableModel>

class SummaryModel : public QAbstractTableModel
{
    Q_OBJECT

public:
    explicit SummaryModel(QObject *parent = nullptr);

    // Header:
    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;

    // Basic functionality:
    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
    int columnCount(const QModelIndex &parent = QModelIndex()) const override;

    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
    bool setData(const QModelIndex &index, const QVariant &value, int role);

    void SetSummaryQuantity(const int&);
    int GetSummaryQuantity() const;


private:

    const int rowQuantity = 8;
    const int columnQuantity = 5;
    int summaryQuantity = 0;
};

#endif // SUMMARYMODEL_H

summarymodel.cpp

#include "summarymodel.h"

SummaryModel::SummaryModel(QObject *parent)
    : QAbstractTableModel(parent)
{
}

QVariant SummaryModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if(role==Qt::DisplayRole)
    {
        if(orientation == Qt::Horizontal) {
             switch(section) {
                 case 0:
                     return QString("Ilość");
                 case 1:
                     return QString("Waluta");
                 case 2:
                     return QString("Obróbka");
                 case 3:
                    return QString("Materiał");
                case 4:
                    return QString("Różnica");
                 default:
                    return QVariant();
            }
        }

        return QVariant();
    }

    return QVariant();
}

int SummaryModel::rowCount(const QModelIndex &parent) const
{
    if (parent.isValid()) return 0;

    return rowQuantity;
}

int SummaryModel::columnCount(const QModelIndex &parent) const
{
    if (parent.isValid()) return 0;

    return columnQuantity;

}

QVariant SummaryModel::data(const QModelIndex &index, int role) const
{
    if (role == Qt::DisplayRole)
    {
        //Quantity
        if (index.row() == 0 && index.column() == 0) return QString("50");
        if (index.row() == 2 && index.column() == 0) return QString("100");
        if (index.row() == 4 && index.column() == 0) return QString("1000");
        if (index.row() == 6 && index.column() == 0) return QString("0");

        //Currency- byc w moze w przyszlosci zmienic na inne
        if (index.row() == 0 && index.column() == 1) return QString("PLN");
        if (index.row() == 1 && index.column() == 1) return QString("EUR");
        if (index.row() == 2 && index.column() == 1) return QString("PLN");
        if (index.row() == 3 && index.column() == 1) return QString("EUR");
        if (index.row() == 4 && index.column() == 1) return QString("PLN");
        if (index.row() == 5 && index.column() == 1) return QString("EUR");
        if (index.row() == 6 && index.column() == 1) return QString("PLN");
        if (index.row() == 7 && index.column() == 1) return QString("EUR");

        //Price Placeholders
        //Material
        if (index.row() == 0 && index.column() == 2) return QString("0,00");
        if (index.row() == 1 && index.column() == 2) return QString("0,00");
        if (index.row() == 2 && index.column() == 2) return QString("0,00");
        if (index.row() == 3 && index.column() == 2) return QString("0,00");
        if (index.row() == 4 && index.column() == 2) return QString("0,00");
        if (index.row() == 5 && index.column() == 2) return QString("0,00");
        if (index.row() == 6 && index.column() == 2) return QString("0,00");
        if (index.row() == 7 && index.column() == 2) return QString("0,00");

        //Machining
        if (index.row() == 0 && index.column() == 3) return QString("0,00");
        if (index.row() == 1 && index.column() == 3) return QString("0,00");
        if (index.row() == 2 && index.column() == 3) return QString("0,00");
        if (index.row() == 3 && index.column() == 3) return QString("0,00");
        if (index.row() == 4 && index.column() == 3) return QString("0,00");
        if (index.row() == 5 && index.column() == 3) return QString("0,00");
        if (index.row() == 6 && index.column() == 3) return QString("0,00");
        if (index.row() == 7 && index.column() == 3) return QString("0,00");

        //Diference
        if (index.row() == 0 && index.column() == 4) return QString("0,00");
        if (index.row() == 1 && index.column() == 4) return QString("0,00");
        if (index.row() == 2 && index.column() == 4) return QString("0,00");
        if (index.row() == 3 && index.column() == 4) return QString("0,00");
        if (index.row() == 4 && index.column() == 4) return QString("0,00");
        if (index.row() == 5 && index.column() == 4) return QString("0,00");
        if (index.row() == 6 && index.column() == 4) return QString("0,00");
        if (index.row() == 7 && index.column() == 4) return QString("0,00");
    }
    if(role==Qt::TextAlignmentRole)
    {
        return Qt::AlignCenter;
    }

    return QVariant();
}

bool SummaryModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    if (index.isValid() && role == Qt::EditRole)
    {
        emit dataChanged(index,index);
        return true;
    }
    else
    {
        return false;
    }
}


void SummaryModel::SetSummaryQuantity( const int &quantity)
{
    summaryQuantity = quantity;
}

int SummaryModel::GetSummaryQuantity() const
{
    return summaryQuantity;
}

I want the cell with index 6,0 to take the value from QLineEdit. I have no idea how to do this. Method setData() return true. When I connect signal and try it with qDebug() it works as I expect (code below)

SLOT (UpdateData())

void QueriesCreator::UpdateData(QModelIndex indexA, QModelIndex indexB)
{
   qDebug()<<"Hello";
}

Any idea how to fix it?

Thanks and Have a great day!

SGaist · 10 May 2023, 18:47

Hi,

Your setData method does nothing. If you want to see changes, you need to store the data passed through setData and return that stored data in the data function.

BushyAxis793 · 5 Oct 2023, 18:48

@SGaist This is the solution! Thank you very much. Below is my new setData() and TextEdited()

setData()

bool SummaryModel::setData(const QModelIndex &index, const QVariant &value, int role)
{

    if (index.isValid() && role == Qt::EditRole)
    {
        SetSummaryQuantity(value.toInt());
        emit dataChanged(index,index);
        return true;
    }
    else
    {
        return false;
    }

    return false;
}

TextEdited()

void QueriesCreator::on_quantityGeneralInformationLineEdit_textEdited(const QString &arg1)
{
    calculations.SetMaterialQuantity(ui->quantityGeneralInformationLineEdit->text().toInt());
    CalculateMaterialCostInZloty();

    summaryModel->setData(ui->summaryDefaultTableView->model()->index(6,0),ui->quantityGeneralInformationLineEdit->text().toInt(),Qt::EditRole);
}

and of course the data()

QVariant SummaryModel::data(const QModelIndex &index, int role) const
{
    if (role == Qt::DisplayRole)
    {
        //Quantity
        if (index.row() == 0 && index.column() == 0) return QString("50");
        if (index.row() == 2 && index.column() == 0) return QString("100");
        if (index.row() == 4 && index.column() == 0) return QString("1000");
        if (index.row() == 6 && index.column() == 0) return GetSummaryQuantity();

        //Currency- byc w moze w przyszlosci zmienic na inne
        if (index.row() == 0 && index.column() == 1) return QString("PLN");
        if (index.row() == 1 && index.column() == 1) return QString("EUR");
        if (index.row() == 2 && index.column() == 1) return QString("PLN");
        if (index.row() == 3 && index.column() == 1) return QString("EUR");
        if (index.row() == 4 && index.column() == 1) return QString("PLN");
        if (index.row() == 5 && index.column() == 1) return QString("EUR");
        if (index.row() == 6 && index.column() == 1) return QString("PLN");
        if (index.row() == 7 && index.column() == 1) return QString("EUR");

        //Price Placeholders
        //Material
        if (index.row() == 0 && index.column() == 2) return QString("0,00");
        if (index.row() == 1 && index.column() == 2) return QString("0,00");
        if (index.row() == 2 && index.column() == 2) return QString("0,00");
        if (index.row() == 3 && index.column() == 2) return QString("0,00");
        if (index.row() == 4 && index.column() == 2) return QString("0,00");
        if (index.row() == 5 && index.column() == 2) return QString("0,00");
        if (index.row() == 6 && index.column() == 2) return QString("0,00");
        if (index.row() == 7 && index.column() == 2) return QString("0,00");

        //Machining
        if (index.row() == 0 && index.column() == 3) return QString("0,00");
        if (index.row() == 1 && index.column() == 3) return QString("0,00");
        if (index.row() == 2 && index.column() == 3) return QString("0,00");
        if (index.row() == 3 && index.column() == 3) return QString("0,00");
        if (index.row() == 4 && index.column() == 3) return QString("0,00");
        if (index.row() == 5 && index.column() == 3) return QString("0,00");
        if (index.row() == 6 && index.column() == 3) return QString("0,00");
        if (index.row() == 7 && index.column() == 3) return QString("0,00");

        //Diference
        if (index.row() == 0 && index.column() == 4) return QString("0,00");
        if (index.row() == 1 && index.column() == 4) return QString("0,00");
        if (index.row() == 2 && index.column() == 4) return QString("0,00");
        if (index.row() == 3 && index.column() == 4) return QString("0,00");
        if (index.row() == 4 && index.column() == 4) return QString("0,00");
        if (index.row() == 5 && index.column() == 4) return QString("0,00");
        if (index.row() == 6 && index.column() == 4) return QString("0,00");
        if (index.row() == 7 && index.column() == 4) return QString("0,00");
    }
    if(role==Qt::TextAlignmentRole)
    {
        return Qt::AlignCenter;
    }

    return QVariant();
}

Now It works as I expect. Thanks and Have a good day!