QTableView & CheckBox delegate alignmnent

giesbert

No, you are to slow, and I'm at home :-))

andre

[quote author="harry" date="1301564361"]I tried to post the source as a wiki ( I created 2 separate pages - one for the delegate and one for the sortproxy thing), but I'm sure I messed it up.
Am I supposed to add them to a category, or does an admin do that?

I tried adding the [[Category... thing but it appeared as plain text.[/quote]

I have modified your wiki page to add a link to "another solution":https://developer.qt.nokia.com/wiki/QSortFilterProxyModel_subclass_to_add_a_checkbox for adding checkboxes to an abstract item model. The use cases for both approaches are different, and I think they nicely supplement each other. I hope you don't mind.

Edit:
I have opened "this topic":https://developer.qt.nokia.com/forums/viewthread/5544/ to discuss the API of the class you posted in the snippet, as I think there is room for improvement.

confused

[quote author="harry" date="1301486015"]Ok I found something that seems to work.
(based on this http://www.qtcentre.org/archive/index.php/t-18675.html)

I'm putting the code here, in case it helps someone else:

The basic idea is that there is something like a QList that holds the indexes of the columns that you want to have checkboxes (I'm already thinking of adding another QList for readonly columns).
Actual usage would be
@
CheckableSortFilterProxyModel *cfpm = new CheckableSortFilterProxyModel(this);
QList<int> boolCols;
boolCols.append( usrModel->fieldIndex("isActive") );
boolCols.append( usrModel->fieldIndex("isOk") );
cfpm->setParameters(boolCols);
cfpm->setSourceModel( mySqlTableModel );
myTableView->setModel(cfpm);
@

Here is the code:

checkablesortfilterproxymodel.h:
@
#ifndef CHECKABLESORTFILTERPROXYMODEL_H
#define CHECKABLESORTFILTERPROXYMODEL_H

#include <QSortFilterProxyModel>

class CheckableSortFilterProxyModel : public QSortFilterProxyModel
{
Q_OBJECT
public:
explicit CheckableSortFilterProxyModel(QObject *parent = 0);

void setParameters(QList<int> boolCols);

protected:
QVariant data(const QModelIndex &index, int role) const;
bool setData(const QModelIndex &index, const QVariant &value, int role);
Qt::ItemFlags flags ( const QModelIndex & index ) const;

signals:

public slots:

private:
QList<int> booleanSet;

};

#endif // CHECKABLESORTFILTERPROXYMODEL_H
@

checkablesortfilterproxymodel.cpp:
@
#include "checkablesortfilterproxymodel.h"

CheckableSortFilterProxyModel::CheckableSortFilterProxyModel(QObject *parent) :
QSortFilterProxyModel(parent)
{
}

void CheckableSortFilterProxyModel::setParameters(QList<int> boolCols) {
booleanSet.clear();
if (!boolCols.isEmpty()) {
foreach(int column , boolCols)
{
booleanSet.append(column);
}
}
}

QVariant CheckableSortFilterProxyModel::data(const QModelIndex &index, int role) const {
if(!index.isValid())
return QVariant();

if(booleanSet.contains(index.column()) && (role == Qt::CheckStateRole || role == Qt::DisplayRole)) {
    if (role == Qt::CheckStateRole)
        return index.data(Qt::EditRole).toBool() ? QVariant(Qt::Checked) : QVariant(Qt::Unchecked);
    else if (role == Qt::DisplayRole)
        return QVariant();
}
else
    return QSortFilterProxyModel::data(index,role);

}

bool CheckableSortFilterProxyModel::setData(const QModelIndex &index, const QVariant &value, int role) {
if(!index.isValid())
return false;

if(booleanSet.contains(index.column()) && role==Qt::CheckStateRole)
{
    QVariant data = (value.toInt()==Qt::Checked) ? QVariant(1) : QVariant (0);
    return QSortFilterProxyModel::setData(index, data, Qt::EditRole);
}
else
    return QSortFilterProxyModel::setData(index,value,role);

}

Qt::ItemFlags CheckableSortFilterProxyModel::flags ( const QModelIndex & index ) const {
if(!index.isValid())
return Qt::ItemIsEnabled;

if(booleanSet.contains(index.column()))
    return Qt::ItemIsUserCheckable | Qt::ItemIsSelectable | Qt::ItemIsEnabled;
else
    return QSortFilterProxyModel::flags(index);

}
@
[/quote]

I know its been over a year since this was las posted but I just wanted to say thank you to Harry for solving this because I have been struggeling with making a check box in a column for a while!