QItemDelegate: painting an unwanted QCheckBox - qt

Question

I have an editable model, which inherits QAbstractTableModel. Also have a custom delegate to go with it. This is my first editable model, and I think I'm missing something. I'm pretty much following the examples found at Nokia. My model tells the delegate that the data is editable via flags(). When I do this, it draws a QSpinBox in the cell.
Underlying model is a simple std::map. The key is days, the value is a rate.
Generally, what is painted in any editable cell, is a QCheckBox, but is ghosted out, then the data. If I double-click on the value, I am shown the editor, which happens to be a custom widget based on QDoubleSpinbox.
Qt::ItemFlags my_model_t::flags( const QModelIndex& index ) const
{
if ( !index.isValid() ) {
return Qt::NoItemFlags;
}
if ( index.column() == col_rates ) {
return QAbstractItemModel::flags( index ) | Qt::ItemIsEditable;
}
return QAbstractItemModel::flags( index );
}
QVariant my_model_t::data( const QModelIndex& index, int role ) const
{
if ( !index.isValid() ) {
return QVariant();
}
if ( role == Qt::DisplayRole || Qt::EditRole ) {
if ( static_cast<int>( rates.size() ) <= index.row() ) {
return QVariant();
}
int day = vec[index.row()];
if ( index.column() == col_days ) {
return day;
} else if ( index.column() == col_rates ) {
std::map<int, double>::const_iterator it = rates.find( day );
if ( it != rates.end() ) {
return (*it).second;
}
}
}
return QVariant();
}
QWidget* my_delegate_t::createEditor( QWidget* parent, const QStyleOptionViewItem& /*option*/, const QModelIndex& index ) const
{
gui_spinbox* editor = new gui_spinbox( parent );
if ( index.column() == col_rate ) {
const my_model_t* model = static_cast<my_model_t*>( index.model() );
}
return editor;
}
void my_delegate_t::setEditorData( QWidget* editor, const QModelIndex& index ) const
{
double value = index.model()->data( index, Qt::EditRole ).toDouble();
gui_spinbox* spin_box = static_cast<gui_spinbox*>( editor );
if ( spin_box ) {
spin_box->setValue( value );
}
}
void my_delegate_t::setModelData( QWidget* editor, QAbstractItemModel* model, const QModelIndex& index ) const
{
gui_spinbox* spin_box = static_cast<gui_spinbox*>( editor );
if ( spin_box ) {
double value = spin_box->value();
model->setData( index, value, Qt::EditRole );
}
}
void my_delegate_t::updateEditorGemoetry( QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& /*index*/ ) const
{
editor->setGeometry( option.rect );
}

Answer 1

I'm not pretty sure about your problem. Do you want to paint a QCheckBox?
In your createEditor method, you created an editor use QSpinbox but in the Title you said it was unwanted.
If you want to be shown an editor based on an QCheckBox when you double clicked an item you just create a checkBox in the createEditor method and use checkBox in setEditorData and setModelData.