Qt4 set and read header data in tableView

[teele]

I tried the Cities example in the book C++ -GUI Programming with Qt 4 first ed., and i tried to set a header data string by using the row

cityModel.setHeaderData(0, Qt::Horizontal, QObject::tr("Name"));

in the main.cpp file.

The code can be compiled and run without any complaints but the added code has not any effects.

The code is

#include <QHeaderView>
#include <QTableView>
 
#include "citymodel.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    QStringList cities;
    cities << "Arvika" << "Boden" << "Eskilstuna"  /*<< "Falun"
           << "Filipstad" << "Halmstad" << "Helsingborg" << "Karlstad"
           << "Kiruna" << "Kramfors" << "Motala" << "Sandviken"
           << "Skara" << "Stockholm" << "Sundsvall" << "Trelleborg" */ ; 
    QStringList layers;
    layers << "l1" << "l2" << "l3" << "l4";
 
    CityModel cityModel;
    cityModel.setCities(cities);
    cityModel.setLayers(layers);
 
    QTableView tableView;
    tableView.setModel(&cityModel);
    tableView.setAlternatingRowColors(true);
    tableView.setWindowTitle(QObject::tr("Cities"));
 
    cityModel.setHeaderData(0, Qt::Horizontal, QObject::tr("Name")); // <------
 
    tableView.show(); 
 
    return app.exec();
}

#include <QHeaderView>
#include <QTableView>

#include "citymodel.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QStringList cities;
    cities << "Arvika" << "Boden" << "Eskilstuna"  /*<< "Falun"
           << "Filipstad" << "Halmstad" << "Helsingborg" << "Karlstad"
           << "Kiruna" << "Kramfors" << "Motala" << "Sandviken"
           << "Skara" << "Stockholm" << "Sundsvall" << "Trelleborg" */ ; 
    QStringList layers;
    layers << "l1" << "l2" << "l3" << "l4";

    CityModel cityModel;
    cityModel.setCities(cities);
    cityModel.setLayers(layers);

    QTableView tableView;
    tableView.setModel(&cityModel);
    tableView.setAlternatingRowColors(true);
    tableView.setWindowTitle(QObject::tr("Cities"));

    cityModel.setHeaderData(0, Qt::Horizontal, QObject::tr("Name")); // <------

    tableView.show(); 

    return app.exec();
}

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How should you set and read header data in this case?

teele

[prasad_N]

It didn't work because view will take header data from model as you set model & implemented header data in model.

try this: you need to do all the manipulations in model only

QVariant CityModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if (role == Qt::DisplayRole)
    {
 
        if((0 == section ) && (orientation == Qt::Horizontal)
           return QVariant("Name");
        else
           return cities[section];
    }
    return QVariant();
}

QVariant CityModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if (role == Qt::DisplayRole)
    {

        if((0 == section ) && (orientation == Qt::Horizontal)
           return QVariant("Name");
        else
           return cities[section];
    }
    return QVariant();
}

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