Is it possible to replace visible QComboBox values with an custom text?

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Hey everyone,

I have a QComboBox that is populated with data via a QDataWidgetMapper with a model. This model contains an ID and an image file from the database.

Let's assume that the data set stored in the QComboBox has three values. For illustration I take the ID field and not the Blob field. The QComboBox will now display the following:

7036
7036
7036

This shows me now that I can select 3 images from a QComboBox. Of course it would be nicer if the 7036 becomes an image 1, 2, 3, so for example:

7036 -> Image 1
7036 -> Image 2
7036 -> Image 3

Is such a thing possible and if so how? Unfortunately I could not find anything on the Internet.Below is another screenshot. I would like to replace these numbers with Image1, Image 2, Image 3.

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Thank you very much for your answers. After many attempts to get the whole thing to work, I have then decided for a somewhat easier way. I have simply created a new field with "filename" in my database table. I now display this in the QComboBox and use it to select the data.

SeDi

Hi,
I have not tried it, I am by no means an expert and haven't used QWidgets for years, but if you want to do complicated things I'd try to inherit from QComboBox and overwrite

QString QComboBoxPrivate::itemText(const QModelIndex &index) const
{
    return index.isValid() ? model->data(index, itemRole()).toString() : QString();
}

with something that gets the proper text displayed.

But wouldn't it suffice to state the visible column?
The docs seem to suggest that:

modelColumn : int
This property holds the column in the model that is visible.

If set prior to populating the combo box, the pop-up view will not be affected and will show the first column (using this property's default value).

By default, this property has a value of 0.

Note: In an editable combobox, the visible column will also become the completion column.

Access functions:

int	modelColumn() const
void	setModelColumn(int visibleColumn)

But, as stated before, all of this is just a guess ymmv.

fadu

@Gabber
hi
are you try somthing like this

 for(int i=-1;i<ui->comboBox->count();i++)
    {
        ui->comboBox->setItemText(i,"Image " + QString::number(i));
    }

SGaist

Hi,

QComboBox uses Qt's item view system so you can use a custom QStyledItemDelegate to show what you want.

? Offline

Thank you very much for your answers. After many attempts to get the whole thing to work, I have then decided for a somewhat easier way. I have simply created a new field with "filename" in my database table. I now display this in the QComboBox and use it to select the data.