How to change QComboBox highlighted item when a particular signal is emitted

[qt.1234]

Hi,

How do i go about changing the highlighted item of the QComboBox's drop down list whenever a signal is emitted? Mouse event is disabled in my case. So by using setCurrentIndex(index), I could change the item in the ComboBox easily but the drop down list is not reflecting the change. Please advise. Thank you.

[VRonin]

Get the model index coresponding to the item i in the list: const QModelIndex idx = combobox->model()->index(i, combobox->modelColumn(), combobox->rootModelIndex());

Select that index:
combobox->view()->selectionModel()->select(idx, QItemSelectionModel::Select); (see https://doc.qt.io/qt-5/qitemselectionmodel.html#SelectionFlag-enum to customise how it gets selected)

[VRonin]

You can use combobox->view()->selectionModel() to corol selected items in the dropdown

[qt.1234]

@VRonin
Hi, Thank you for your reply. Do I use this?

option 1:
combobox->view()->selectionModel()->isSelected()->selectedRows(index);

option 2:
QModelIndex selectedItem;
selectedItem.sibling(index,0);
combobox->view()->selectionModel()->setCurrentIndex(selectedItem, QItemSelectionModel::Select);

i have tried the above and it do not work. The drop down list is not reflecting the change, Did i do it right?

[JonB]

@qt-1234
You don't want the isSelected() in the middle, that just returns a bool. Similarly selectedRows() returns selected rows. There is a select() slot to do selection.

[VRonin]

Get the model index coresponding to the item i in the list: const QModelIndex idx = combobox->model()->index(i, combobox->modelColumn(), combobox->rootModelIndex());

Select that index:
combobox->view()->selectionModel()->select(idx, QItemSelectionModel::Select); (see https://doc.qt.io/qt-5/qitemselectionmodel.html#SelectionFlag-enum to customise how it gets selected)

[qt.1234]

@VRonin Thank you for your help! This works!