Black list of QCombobox items

Kaluss

Hi All,
I have following problem:
I'm adding into QTableView by setIndexWidget combobox for selected index.

My problem is that when I click on combobox I see black list.
Names are only show when I put my mouse pointer on particular item.

Does sombody know how can I handle that?

BR/T

VRonin

Did you set a stylesheet?

The correct way, anyway is not to use setIndexWidget but reimplement QItemEditorFactory to make it create a combobox then set it to that column:

auto comboDelegate = new QStyledItemDelegate(tableView);
comboDelegate->setItemEditorFactory(new MyComboFactory(comboDelegate));
tableView->setItemDelegateForColumn(/*index of column copy*/,comboDelegate);

Kaluss

No, I don't use set stylesheet?
Could you give me an example of MyComboFactory?

BR/T

VRonin

Is the list of options in the combobox fixed or does it change from cell to cell?

Kaluss

For each row is different.
This is a product list which has to set different label.

VRonin

How does each row know what list to show?

Kaluss

From configuration.
It's a global object.

For each combobx the list of items will be the same, but which item is set it depends on configuration.
Each row represents one product from configuration.

VRonin

@Kaluss said in Black list of QCombobox items:

For each combobx the list of items will be the same

That's what I wanted to know

#include <QStringListModel>
#include <QComboBox>
#include <QStyledItemDelegate>
class ComboDelegate : public QStyledItemDelegate{
    Q_DISABLE_COPY(ComboDelegate)
public:
    ComboDelegate(QObject* parent = Q_NULLPTR)
        : QStyledItemDelegate(parent)
        , m_options(new QStringListModel(this))
    {}
    QStringList options() const {return m_options->stringList();}
    void setOptions(const QStringList& opt){
        m_options->setStringList(opt);
    }
    virtual QWidget* createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const Q_DECL_OVERRIDE{
        Q_UNUSED(option);
        Q_UNUSED(index);
        QComboBox* editor = new QComboBox(parent);
        editor->setModel(m_options);
        return editor;
    }
    virtual void setEditorData(QWidget *editor, const QModelIndex &index) const Q_DECL_OVERRIDE{
        QComboBox* cbEditor = qobject_cast<QComboBox*>(editor);
        Q_ASSERT(cbEditor);
        cbEditor->setCurrentIndex(cbEditor->findText(index.data().toString()));
    }
    virtual void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const Q_DECL_OVERRIDE{
        QComboBox* cbEditor = qobject_cast<QComboBox*>(editor);
        Q_ASSERT(cbEditor);
        model->setData(index,cbEditor->currentText());
    }
private:
    QStringListModel* m_options;
};

Kaluss

Hi,
I get the error:
qt has no member named 'stOptions'.

Its shouldn't be there just options?

If I change it to options I get:
error: no matching function for call to 'ComboDelegate::options(QStringList&)'
case 0: _t->options(reinterpret_cast< QStringList>(_v)); break;
^

VRonin

I updated the code above to make it more efficient. how are you using it?

Kaluss

this->m_tableview_main->setItemDelegateForColumn(4, new ComboDelegate);

But I have the same problem as above.
The list of available items is black.

What I have to do show editor permanently not only at edition mode?

VRonin

@Kaluss said in Black list of QCombobox items:

What I have to do show editor permanently not only at edition mode?

reimplement paint() on the delegate.

Before I get into it. Are you 100% adamant you don't set a stylesheet anywhere in the tableView or the widgets that are in parental relationship to it?

Kaluss

Hi,
I found the reason. But it's not completely clear for me.
It was:
this->m_tableview_main->setStyleSheet("background-color:transparent;");

Anyway, thanks for your help and examples.
It helped me much.

BR/T