CODEWITHSUNDEEP
c++qt
FarFarAway
FarFarAway

Reputation: 1115

Model of the QTableView dosent view values as desired

I have a QTableview with model. I populate dummy data in the model using this code 

horizontalHeader.append("Name");
horizontalHeader.append("Type");
horizontalHeader.append("Unit price");
horizontalHeader.append("qty");
item00 = new QStandardItem(QString("0"));
item01 = new QStandardItem(QString("0"));
item02 = new QStandardItem(QString("0"));
item03 = new QStandardItem(QString("0"));
QList<QStandardItem*> list;

list.push_back(item00);
list.push_back(item01);
list.push_back(item02);
list.push_back(item03);

for (int i=0; i<100; i++){
      list.at(0)->setText(QString::number(i));
      list.at(1)->setText(QString::number(i));
      list.at(2)->setText(QString::number(i));
      list.at(3)->setText(QString::number(i));
      model.insertRow(i,list);
}

the result should be a table of 100 rows and four columns and the content of the rows is a number but instead I am getting a the first row populated with data and the other rows are just empty as per the following screenshot enter image description here

Upvotes: 1

Views: 129

Answers (2)

Mike
Mike

Reputation: 8355

You are inserting the same QStandardItems a 100 times, this should result in the following warning for every insert operation, starting from the second:

QStandardItem::insertRows: Ignoring duplicate insertion of item 0xxxxxxxxx

So, in your code, all insert operations (starting from the second) will be ignored, and then the QStandardItem (that was already inserted in the first operation) is set to the new value of i (that explains why you get one row 99s in it).

Instead, you should use new QStandardItems for each row insert, like this:

for (int i=0; i<100; i++){
    QList<QStandardItem*> list;
    list.append(new QStandardItem(QString::number(i)));
    list.append(new QStandardItem(QString::number(i)));
    list.append(new QStandardItem(QString::number(i)));
    list.append(new QStandardItem(QString::number(i)));
    model.insertRow(i,list);
}

Upvotes: 3

Kevin Krammer
Kevin Krammer

Reputation: 5207

You need to create the items inside the loop

for (int i = 0; i < 100; ++i) {
    QList<QStandardItem*> list;
    list << new QStandardItem(QString::number(i));
    list << new QStandardItem(QString::number(i));
    list << new QStandardItem(QString::number(i));
    list << new QStandardItem(QString::number(i));

    model.appendRow(list);
}

Or even with an inner loop to create the four items.

Upvotes: 1

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