Add form widget in QTableview using model view

[JadeN001]

how to add row and column as needed in Qtableview

[SGaist]

The QTableView shows what the model has to give. If the model says 8 column then the table view will show 8.

[JadeN001]

@SGaist okay It means I have to manage model.

[JadeN001]

In my code i have used insertrow() in my QStandardItemModel.

void MainWindow::seteditor()
{

   model=new QStandardItemModel(this);

    QStandardItem *item=new QStandardItem(" ");
    ui->tableView->setModel(model);

      for(int row=0;row<4;++row)
      {
           model->insertRow(row,item);
           QModelIndex index= model->index(row,1,QModelIndex());
         ui->tableView->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
        ui->tableView->verticalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
           ui->tableView->setItemDelegate(D);
           ui->tableView->openPersistentEditor(index);  '<- not working'


      }



        }

however if I use :

   model=new QStandardItemModel(8,2,this);

instead of

   model=new QStandardItemModel(this);

It works properly.But I want to use first approach.Where I am doing mistake?

[mrjj]

Hi
You mean like
model=new QStandardItemModel(this);
model->setRowCount(8):
model->setColumnCount(2):

[JadeN001]

@mrjj I want to increase number of cells based on client connection.So for that i have to use counter for generating rows and columns.

It is helpful to use
model=new QStandardItemModel(this);
model->setRowCount(8):
model->setColumnCount(2):
Instead of model=new QStandardItemModel(8,2,this); so that i can set rows and column based on requirments.

I am on right track or not i don't.suggest me if there is ant better way for my scenario.

[mrjj]

@JadeN001
Hi
you should test if
void QStandardItemModel::appendRow(const QList<QStandardItem *> & items)
does not auto increase row count also.

[JadeN001]

@mrjj thanks..
It does not auto increase row count

[mrjj]

@JadeN001
ok, so u have to manage that yourself

[JonB]

@mrjj , @JadeN001

It does not auto increase row count

You guys are claiming that QStandardItemModel::rowCount() remains unchanged after QStandardItemModel::appendRow()? Surely something is wrong here....?

[mrjj]

@JonB
Nope, i said check it as it really sound it would. ( append in name)
But docs says
"Appends a row containing items. If necessary, the column count is increased to the size of items."
And no mention of rowCount.
But i really suspect it would so if you says it does, i believe you over the docs.

[JonB]

@mrjj

"Appends a row containing items. If necessary, the column count is increased to the size of items."
And no mention of rowCount.

My belief is that this should be interpreted as: of course the row count increases, as it would for anything, that goes without saying; if the columns in the row exceed current columns then you might not realize but the column count is increased [too].

The only other interpretation is that another is removed to maintain the row count, but then I think it would say and you would notice.

But it's pure speculation.

[mrjj]

@JonB
Also my belief so i wanted poster to test it out :)
by outputting rowCount before and after append.

[JonB]

@mrjj
I find it hard to believe it did not increase. Unless the row did not get added.

[mrjj]

@JonB
me too. Worst name ever if it didnt.
So most likely poster had other issue.