Text from a QTableView's cell shows through inline QComboBox - OSX

rpadrela

    class ComboBoxDelegate : public QStyledItemDelegate
    {
        Q_OBJECT

    public:
        explicit ComboBoxDelegate(QObject* parent);
        ~ComboBoxDelegate() override = default;

        QWidget* createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
        void setEditorData(QWidget *editor, const QModelIndex &index) const override;
        void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const override;
    };

    ComboBoxDelegate::ComboBoxDelegate(QObject* parent)
    : QStyledItemDelegate(parent)
    {
    }

    QWidget* ComboBoxDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
    {
        QComboBox* comboBox = new QComboBox(parent);
        comboBox->setModel(new ValueListModel(index));
        return comboBox;
    }

    void ComboBoxDelegate::setEditorData(QWidget* editor, const QModelIndex& index) const
    {
        qobject_cast<QComboBox*>(editor)->setCurrentText(index.data(Qt::EditRole).toString());
    }

    void ComboBoxDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const
    {
        model->setData(index, qobject_cast<QComboBox*>(editor)->currentText());
    }

Thank you for looking into this.

VRonin

Try adding:

public:
void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &) const override{
editor->setGeometry(option.rect);
}

rpadrela

@VRonin Thanks for the suggestion. Unfortunately, it makes no difference.

VRonin

this is very odd... do you have a custom stylesheet applyed?

rpadrela

@VRonin Nope

nagesh

@rpadrela I feel there is some thing wrong here(not sure)

    {
        qobject_cast<QComboBox*>(editor)->setCurrentText(index.data(Qt::EditRole).toString());
    }

Why are you setting the combo box text here?
Is it editable comboBox?
Set the comboBox setCurrentIndex here. If comboBox list of elements is set through model.

VRonin

@nagesh The current code is correct.

from https://doc.qt.io/qt-5/qcombobox.html#currentText-prop

The setter setCurrentText() simply calls setEditText() if the combo box is editable. Otherwise, if there is a matching text in the list, currentIndex is set to the corresponding index.

rpadrela

@nagesh QComboBox is not editable.

Could this be an issue currently affecting Mac OS X only?

VRonin

@rpadrela said in Text from a QTableView's cell shows through inline QComboBox - OSX:

Could this be an issue currently affecting Mac OS X only?

On windows, both the windows style and Fusion work correctly with this delegate.

Could you try adding QApplication::setStyle(QStyleFactory::create("Fusion")); after you create the QApplication in your main()? and see if you still have the problem on Fusion?

SGaist

Did you test with 6.1 ?
From the looks of it's indeed macOS specific. IIRC there have been several glitches in the rendering of widgets with item views.

rpadrela

@VRonin

This

QApplication::setStyle(QStyleFactory::create("Fusion"));

fixes it.

I haven't looked into styles yet but it seems like I should. :D

Thank you for your help.

VRonin

This means it's a bug in MacOS style, might be worth reporting it

rpadrela

@VRonin just reported it here https://bugreports.qt.io/browse/QTBUG-93731

Thank you everyone for your help.