Is (QStandardItemModel) Table column Selected iterator - help

mmikeinsantarosa

NooB here.
I am filling a QtableView on a form by loading data etc into a QStandardItemModel. I'd like to be able to iterate over the table columns to determine which columns the user has selected (clicked & hi-lighted) the header. I'm lost at how to approach this. from what I've read QItemSelectionModel, QModelIndex and IsSelected may be involved. Any help here will be thunderously applauded. Here's a snip

QStandardItemModel *model = new QStandardItemModel(6,3,this);

model->setHorizontalHeaderItem(0, new QStandardItem(QString("Column 1 Header")));
model->setHorizontalHeaderItem(1, new QStandardItem(QString("Column 2 Header")));
model->setHorizontalHeaderItem(2, new QStandardItem(QString("Column 3 Header")));

ui->tblFileData->setModel(model);

for (int i = 0; i < model->columnCount(); i++)
{
    int j = ui->tblFileData->columnAt(0);
    qDebug() << "That value is " << j;
}

thanks - mike

SGaist

Hi,

You can use the QItemSelectionModel from the associated view.

VRonin

from what I've read QItemSelectionModel, QModelIndex and IsSelected may be involved

Good job!

const auto selectedIndexes = ui->tblFileData->selctionModel()->selectedIndexes();
for(auto&& singleIndex : selectedIndexes){
qDebug() << "row: " << singleIndex.row() << " col: " << singleIndex.column()  << " data: " << singleIndex.data();
}

mmikeinsantarosa

I'm actually looking to create a list of the selected columns. Here's what I have:

    QString del = ";";
    QString values = "";
    QString value;
    int col;
    const auto selectedIndexes = ui->tblFileData->selectionModel()->selectedIndexes();
    for(auto&& singleIndex : selectedIndexes)
    {
        //qDebug() << "row: " << singleIndex.row() << " col: " << singleIndex.column()  << " data: " << singleIndex.data();
        col = singleIndex.column();
        value = QString::number(col);
        qDebug() << "col = " << col << " value = " << value;
        // delete duplicates
        if (!values.contains(value))
        {
            values.append(value);
            values.append(del);
        }
        qDebug() << " values " << values;
    }
}

// if all 3 columns have been selected I get 0;1;2;
// I'll need to strip the trailing ";"

/* There's got to be a better way but this works */

Thanks to all!

VRonin

@mmikeinsantarosa said in Is (QStandardItemModel) Table column Selected iterator - help:

There's got to be a better way

QSet<int> valuesSet;
const auto selectedIndexes = ui->tblFileData->selectionModel()->selectedIndexes();
for(auto&& singleIndex : selectedIndexes)
valuesSet << singleIndex.column();
QStringList valuesList;
valuesList.alloc(valuesSet.size());
Q_FOREACH(int tempValue,valuesSet){valuesList << tempValue;}
qDebug() << valuesList.join(';');

mmikeinsantarosa

@VRonin said in Is (QStandardItemModel) Table column Selected iterator - help:

for(auto&& singleIndex : selectedIndexes)

Is there a way to limit the foreach loop?
I was thinking something like:
for(auto&& singleIndex : selectedIndexes(0:1))

but of course this doesn't work.

thanks again!

VRonin

selectedIndexes is just a QList:

for(auto&& singleIndex : selectedIndexes)
valuesSet << singleIndex.column();

is the same as:

for(int i=0;i<selectedIndexes.size();++i)
valuesSet << selectedIndexes.at(i).column();

mmikeinsantarosa

Thanks for your input. I learned a lot on this one.