spinbox input add rows ??

[jsulm]

@n-2204 https://doc.qt.io/qt-5/qabstractitemmodel.html#insertRow
"Inserts a single row before the given row in the child items of the parent specified".
So, what do you think should you pass as row to insertRow to add at the end of the table?

[JonB]

@n-2204

@jsulm said in spinbox input add rows ??:

@n-2204 https://doc.qt.io/qt-5/qabstractitemmodel.html#insertRow
"Inserts a single row before the given row in the child items of the parent specified".
So, what do you think should you pass as row to insertRow to add at the end of the table?

Further to @jsulm. insertRow() says

Note: This function calls the virtual method insertRows.

And in the docs for insertRows, immediately adjacent to insertRow, if you read it it actually tells you what to pass so that

the rows are appended to any existing rows

Please take the time to read docs....

[n-2204]

how can i set value of a spinbox and also edittable for user ?

 void tool::setTable2Rows()
 {
QAbstractItemModel* table2 = ui.tableView_2->model();
int rows2 = ui.spinBox_2->value();
  ui.spinBox->setValue(10);//this is not working
  model2->setRowCount(rows2);
}

if i setvalue 10 then that no. of rows should be there

[JonB]

@n-2204 said in spinbox input add rows ??:

ui.spinBox->setValue(10);//this is not working

Don't what you mean. "Not working" could indicate anything. I imagine this works perfectly well.

how can i set value of a spinbox and also edittable for user ?

if i setvalue 10 then that no. of rows should be there

Don't know what these mean either.

[n-2204]

not working means value is not set to 10

and when i setvalue as 10 , 10 rows should be there in my table
also when user change the spinbox value to 11 or 8 no. of rows in table should update

[JonB]

@n-2204 said in spinbox input add rows ??:

not working means value is not set to 10

What value is not set to 10? You can see what it sets:

ui.spinBox->setValue(10);

I would bet my bottom $ that it does exactly that.

and when i setvalue as 10 , 10 rows should be there in my table

Your code has

model2->setRowCount(rows2);

so that is what it does.

also when user change the spinbox value to 11 or 8 no. of rows in table should update

Which spinbox? Only if you call the code to set the rows when the spin value changes, and only if the code is correct. Which i have to say does not look like the case for the 4 lines of code you have shown...

[n-2204]

code:

 tool::tool(QWidget* parent)
: QMainWindow(parent)
{
ui.setupUi(this);
model = new QStandardItemModel(0, 13, this);//row*col
model2 = new QStandardItemModel(0, 19, this)
ui.spinBox->setValue(10);
ui.spinBox_2->setValue(10);

using this in spinbox value is 10 but the same no. of rows is not updated in my table
so when i set value in spinbox same no. of rows should be added in my table
and when user change value in spinbox row should update (that is happening)

 connect(ui.spinBox, QOverload<int>::of(&QSpinBox::valueChanged), 
         this, &tool::setTableRows);
 connect(ui.spinBox_2, QOverload<int>::of(&QSpinBox::valueChanged),
         this, &tool::setTable2Rows);
 } 
void tool::setTableRows()
{
QAbstractItemModel* table1 = ui.tableView->model();
int rows = ui.spinBox->value();
model->setRowCount(rows);
 } 

 void tool::setTable2Rows()
{
QAbstractItemModel* table2 = ui.tableView_2->model();
int rows2 = ui.spinBox_2->value();
model2->setRowCount(rows2);
}

[JonB]

@n-2204 said in spinbox input add rows ??:

using this in spinbox value is 10 but the same no. of rows is not updated in my table

If I understand correctly.

At the time you call

ui.spinBox->setValue(10);

you have not yet done the

 connect(ui.spinBox, QOverload<int>::of(&QSpinBox::valueChanged), 
         this, &tool::setTableRows);

So if you are expecting the slot setTableRows() to be called to actually create rows during the setValue(), it won't be. Why should it?

Either connect the signals before setting the values, or call the slots explicitly first time before you start out.

Is that what you mean?

[n-2204]

@JonB said in spinbox input add rows ??:

@n-2204 said in spinbox input add rows ??:

using this in spinbox value is 10 but the same no. of rows is not updated in my table

If I understand correctly.

At the time you call

ui.spinBox->setValue(10);

you have not yet done the

 connect(ui.spinBox, QOverload<int>::of(&QSpinBox::valueChanged), 
         this, &tool::setTableRows);

So if you are expecting the slot setTableRows() to be called to actually create rows during the setValue(), it won't be. Why should it?

Either connect the signals before setting the values, or call the slots explicitly first time before you start out.
ok understood
Is that what you mean?
yes
thanks