TableView background color

Mogli123

Hello,

I am new in qt and c++ and hope that someone can help me.
I will change the background color in a TableView for some cells, but it doesn't work.

tableanpassen.cpp

Tableanpassen::Tableanpassen(QObject *parent):QSqlRelationalTableModel (parent)
{
}

QVariant Tableanpassen::data(const QModelIndex &index, int role) const
{
    int row = index.row();
    int col = index.column();

    if(role == Qt::BackgroundRole)
    {
        if (row == 1 && col == 2)   //change background only for cell(1,2)
       {
            QBrush Background(Qt::red);
            return Background;
       }
    }
    return QSqlRelationalTableModel::data(index, role);
}

tableanpassen.h

#ifndef TABLEANPASSEN_H
#define TABLEANPASSEN_H

//#include <QSqlQueryModel>
#include "QSqlRelationalTableModel"

class Tableanpassen : public QSqlRelationalTableModel
{
    Q_OBJECT

public:
    Tableanpassen(QObject *parent = nullptr);

    QVariant data(const QModelIndex &item, int role) const;

};

#endif // TABLEANPASSEN_H

and in the .cpp below i set the model but I think there is the mistake.

test_screen::test_screen(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::test_screen)
{
    ui->setupUi(this);


    model = new QSqlRelationalTableModel(this);
    model->setQuery("SELECT * FROM WekzeugWechselWarnung");
    model->setHeaderData(0, Qt::Horizontal, tr("Werkzeug Nr."));
    model->setHeaderData(1, Qt::Horizontal, tr("Zeit"));

    model->setData(model->index(1,2),QBrush(Qt::red), Qt::BackgroundRole);  (is that right)

    ui->tableView->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
    ui->tableView->setModel(model);
 ...

Thank you for help.

[koahnig:code tags added]

raven-worx

@Mogli123
just to make sure: indexes are 0-based. So first row/column has an index of 0 not 1.
In case you only showing 1 row of data in your table and wondering why the background doesn't get applied.

Mogli123

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