QtAbstractModel and checkboxes

[paradoxi]

Hi everybody,

I have managed to create a custom model by implementing QAbstractModel and setting my data from a vector of structures(setting the first 3 columns). But when I try and add checkboxes on the fourth column I seem unable to make these checkable or uncheckable.
The last 2 days I have been searching the internet and understand that I need a virtual method which is called setData. Even so I seem unable to get it to work as I want. (The fourth column shows the checkboxes, but I cannot change to checked / unchecked).

Any help or advice towards the correct way to do this would be highly appreciated. Other then the issue with the checkbox the Abstract model is usable in a Qtableview and visualises 3.7 million rows of genome data without a glitch and at high speed. (which impressed me).

header

#ifndef DATALISTMODEL_H
#define DATALISTMODEL_H
 
#include <QAbstractTableModel>
#include <QMap>
#include <vector>
#include <QFont>
#include <QCheckBox>
 
struct dataStructRow
{
    std::string markername;
    std::string samplename;
    std::string geno;
};
 
class dataListModel : public QAbstractTableModel
{
public:
    explicit dataListModel(std::vector<dataStructRow> &dataStructList, QObject *parent = 0);
 
    int rowCount(const QModelIndex &parent) const;
    int columnCount(const QModelIndex &parent) const;
    QVariant data(const QModelIndex &index, int role) const;
    QVariant headerData(int section, Qt::Orientation orientation,
                           int role = Qt::DisplayRole) const;
    Qt::ItemFlags flags ( const QModelIndex &index ) const;
    bool setData(const QModelIndex &index, const QVariant &value, int role=Qt::EditRole);
 
private:
    dataStructRow dataMap;
    std::vector<dataStructRow>& _dataStructList;
    QList<QString> _headers;
    QFont _font;
};
 
#endif

#ifndef DATALISTMODEL_H
#define DATALISTMODEL_H

#include <QAbstractTableModel>
#include <QMap>
#include <vector>
#include <QFont>
#include <QCheckBox>

struct dataStructRow
{
    std::string markername;
    std::string samplename;
    std::string geno;
};

class dataListModel : public QAbstractTableModel
{
public:
    explicit dataListModel(std::vector<dataStructRow> &dataStructList, QObject *parent = 0);

    int rowCount(const QModelIndex &parent) const;
    int columnCount(const QModelIndex &parent) const;
    QVariant data(const QModelIndex &index, int role) const;
    QVariant headerData(int section, Qt::Orientation orientation,
                           int role = Qt::DisplayRole) const;
    Qt::ItemFlags flags ( const QModelIndex &index ) const;
    bool setData(const QModelIndex &index, const QVariant &value, int role=Qt::EditRole);

private:
    dataStructRow dataMap;
    std::vector<dataStructRow>& _dataStructList;
    QList<QString> _headers;
    QFont _font;
};

#endif

To copy to clipboard, switch view to plain text mode 

Implementation

#include <QtCore>
 
#include "datalistmodel.h"
 
dataListModel::dataListModel(std::vector<dataStructRow> &dataStructList, QObject *parent)
    : QAbstractTableModel(parent),  _dataStructList(dataStructList),  _font(QFont("Courier", 10, QFont::Bold))
{
    _headers << "Markername" << "Sample" << "genotype" << "Select";
}
 
 
int dataListModel::rowCount(const QModelIndex & /* parent */) const
{
      return _dataStructList.size();
}
 
int dataListModel::columnCount(const QModelIndex & /* parent */) const
{
    return 4;
}
 
QVariant dataListModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid()) {
        return QVariant();
    } else if (role == Qt::DisplayRole) {
        dataStructRow perRowdataStruct = _dataStructList[index.row()];
        switch(index.column()) {
        case 0:
            return QString::fromStdString(perRowdataStruct.markername);
        case 1:
            return QString::fromStdString(perRowdataStruct.samplename);
        case 2:
            return QString::fromStdString(perRowdataStruct.geno);
        default:
            return QVariant();
        }
    } else if (index.column() == 3 && role == Qt::CheckStateRole) {
            return Qt::ItemIsUserCheckable;
    } else {
        return QVariant();
    }
}
 
QVariant dataListModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if (role == Qt::DisplayRole) {
         if (orientation == Qt::Horizontal){
             return _headers[section];
        }
    } else if ( role == Qt::FontRole) {
            return _font;
    }
        return QVariant();
}
 
bool dataListModel::setData(const QModelIndex & index, const QVariant & value, int role)
{
  if (index.isValid() && role == Qt::EditRole) {
                emit dataChanged(index, index);
                return true;
        }
        return false;
}
 
 
Qt::ItemFlags dataListModel::flags(const QModelIndex& index) const
{
    Qt::ItemFlags flags = QAbstractItemModel::flags(index);
    flags |= (Qt::ItemIsSelectable
             |Qt::ItemIsUserCheckable
             |Qt::ItemIsEnabled);
    return flags;
}

#include <QtCore>

#include "datalistmodel.h"

dataListModel::dataListModel(std::vector<dataStructRow> &dataStructList, QObject *parent)
    : QAbstractTableModel(parent),  _dataStructList(dataStructList),  _font(QFont("Courier", 10, QFont::Bold))
{
    _headers << "Markername" << "Sample" << "genotype" << "Select";
}


int dataListModel::rowCount(const QModelIndex & /* parent */) const
{
      return _dataStructList.size();
}

int dataListModel::columnCount(const QModelIndex & /* parent */) const
{
    return 4;
}

QVariant dataListModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid()) {
        return QVariant();
    } else if (role == Qt::DisplayRole) {
        dataStructRow perRowdataStruct = _dataStructList[index.row()];
        switch(index.column()) {
        case 0:
            return QString::fromStdString(perRowdataStruct.markername);
        case 1:
            return QString::fromStdString(perRowdataStruct.samplename);
        case 2:
            return QString::fromStdString(perRowdataStruct.geno);
        default:
            return QVariant();
        }
    } else if (index.column() == 3 && role == Qt::CheckStateRole) {
            return Qt::ItemIsUserCheckable;
    } else {
        return QVariant();
    }
}

QVariant dataListModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if (role == Qt::DisplayRole) {
         if (orientation == Qt::Horizontal){
             return _headers[section];
        }
    } else if ( role == Qt::FontRole) {
            return _font;
    }
        return QVariant();
}

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


Qt::ItemFlags dataListModel::flags(const QModelIndex& index) const
{
    Qt::ItemFlags flags = QAbstractItemModel::flags(index);
    flags |= (Qt::ItemIsSelectable
             |Qt::ItemIsUserCheckable
             |Qt::ItemIsEnabled);
    return flags;
}

To copy to clipboard, switch view to plain text mode 

[Guett_31]

I think the problem is how you reimplemented data() and setData().
Take a look at that thread below. It explains how to do it with a QFileSyetemModel but it should be easily applicable to your case.
http://www.qtcentre.org/threads/2725...ith-checkboxes