Dropdown in Qtableview

n-2204

I Want to add a drop down in a Qtableview at fixed a column and a row(1,1). drop down 3-4 values. And have to make one value as editable
tableview is not ui, have created using a Qtableview class.

What are the approach , do implement this ?
I know one way is using Qcomboboxdelegate.

Thankyou.

n-2204

any other approach to add drop down in a qtableview that Qt provides or i can use the qt class ?

SGaist

Hi,

So you want to have an editable QComboBox in a specific cell ?

n-2204

@SGaist

I want a dropdown in a QTableview cell, drop down has 2 values like a and b,  if user selects a then that is editable, but if b then non editable.                
            
When user selects a from drop down the cell content should set as a and user can edit that cell (Qtableview cell ) value, but if user selects b then cell is not editable.

JonB

@n-2204
This is not at all clear. (It is also very weird!)

You want a dropdown to appear in a cell. That dropdown has 2 values, a and b. User can select, by clicking, either value. If user selects b then "nothing special happens". But if user selects a what becomes editable? The a that the user has just selected?? Something else??

Apart from the fact that it is hard to think of a case for this UI approach, it does not sound like it has anything to do with being in a QTableView cell. Take the combobox outside of the table and design whatever behaviour you say you want, get that working, before you worry about how to put it into a table.

n-2204

@JonB

Ya, my mistake not mentioned clear. When user select a from drop down the cell content should set as a and user can edit that cell (Qtableview cell ) value, but if user selects b then cell is not editable.

SGaist

Can you explain the workflow of that design ?

While the "effect" is a bit clearer, as @JonB I fail to see how you want your users to interact with your application ?

n-2204

@SGaist @JonB

As I mentioned earlier, In a Qtableview cell I want to add a drop down option drop down contains two option like a ,b and basically a ,b, if user selects a then that cell will be editable it user select b then cell will be non editable this m doing for my calculation purpose , like b will have default data but if user want to change then change it to a an edit it.

If any suggestions plz mention. Thank you

SGaist

And that on one specific cell ?

n-2204

@SGaist yes

SGaist

Then why not just position a QComboBox there and hide it once it has been used ?

n-2204

@SGaist
can you explain more?

what I understood is, add a combobox and do the selection like if selected a then edit that to other value and if selected b then set the value to tableview cell and then hide combobox ??

SGaist

Yes, since you only have that one combo box for that unique action.

n-2204

@SGaist

hide the QCombobox how to do that?

And one issue when editing the combobox , new value in adding to new index?
how can I replace ?

jsulm

@n-2204 said in Dropdown in Qtableview:

hide the QCombobox how to do that?

https://doc.qt.io/qt-5/qwidget.html#hide

n-2204

void QWidget::hide()
will hide the combobox from cell, and I have to show user the value of combobox selected by user like if combobox has 2 values when user selects a it is editable user can change it to t and if user selects b then its non editable and this value is set but if use hide then combobox will be hidden ?

jsulm

@n-2204 said in Dropdown in Qtableview:

if user selects b then its non editable and this value is set but if use hide then combobox will be hidden ?

Then show the selected value in a QLabel

n-2204

how to replace value in combobox?

  testdropdown::testdropdown(QWidget *parent)
: QMainWindow(parent)
 {
ui.setupUi(this);

QStandardItemModel* stndrditem_model1 = NULL;
QComboBox* combobox1;
QStringList lst;

if (stndrditem_model1 == NULL) {
    stndrditem_model1 = new QStandardItemModel(10, 11, this);//row*col
}

ui.tableView->setModel(stndrditem_model1);
ui.tableView->setColumnWidth(2, 1);

const QModelIndex idx = stndrditem_model1 ->index(1, 1);
combobox1 = qobject_cast<QComboBox*>(ui.tableView->indexWidget(idx));
 if (!combobox1) {
     combobox1 = new QComboBox();
     ui.tableView->setIndexWidget(idx, combobox1);
 }

 lst<< "test" << "testdata";
 combobox1->addItems(lst);
 connect(combobox1, 
QOverload<int>::of(&QComboBox::currentIndexChanged), this, &testdropdown::testedit);

 }
  void testdropdown::testedit(int indx) {
if (indx == 1) { //when user select testdata
    combobox1->setEditable(true);
//when user enter at index 1 the new data added at index 2 I want to replace at same index  
    //how to replace testdata string list value with new value in combobox and index should remain same which is entered by user  ??
  
}
else{
    combobox1->setEditable(false);
}
}