How to use Model for QCombobox

Question

Hi guys

I want to use QCombobox as a the Combobox of Swing in Java. So i need to use Model for holding my object. How can i hold my object in QCombobox. (I think that I should hold data in Model because QCombobox was designed according to MVC Pattern ... ) Any help will be appreciated.

Answer 1

You can add a model to your QCombobox by using the setModel function. You can use a predefined model or create your own by inheriting from QAbstractItemModel.

Your model will contain your object to separate display from data.

Answer 2

Depending on what you want to display with your QComboBox, you'll need to write your own model, inheriting QAbstractListModel, reimplementing rowCount()and data().

Then, use QComboBox::setModel() to make the QComboBox display it.

If you just want to display strings, you can use a QStringListModel, provided with Qt.

Answer 3

Qt uses a simplified version of MVC which only has the Model / View parts.

You can use one of the provided subclasses of QAbstractItemModel if you don't need any specialized behaviour, which one to use depends on whether you keep your data in a file system or a data structure in memory.

You should read up the whole section on model/view programming in the Qt documentation.