Hello!

I’m implementing an item delegate to extend the QStyledItemDelegate. The idea is whe an value is a QStringList i use a QComboBox as editor in the item delegate. But i have some problems

1. When i set the QStringList in the data of a view (lets say a tree), the cell doesn’t show a text. When i double click the cell a combobox appears, i can make a selection, the combobox closes and nothin is diplayed in the cell

2. When i want to know what is the selection i can’t figure ir out how to get the item selected in the QComboBox.

Any ideas?

Qt Code: 
  1. class ItemDelegate : public QStyledItemDelegate {
  2.      Q_OBJECT
  3.  
  4.  public:
  5.      ItemDelegate(QObject *parent = 0): QStyledItemDelegate(parent) {;}
  6.      virtual ~ItemDelegate() { ; }
  7.  
  8.      QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
  9.                            const QModelIndex &index) const;
  10.  
  11.      void setEditorData(QWidget *editor, const QModelIndex &index) const;
  12.  
  13.      void setModelData(QWidget *editor, QAbstractItemModel *model,
  14.                        const QModelIndex &index) const;
  15.  
  16.      inline void updateEditorGeometry(QWidget *editor,const QStyleOptionViewItem &option, const QModelIndex& ) const {
  17.        editor->setGeometry(option.rect);
  18.      }
  19.  
  20.  };
To copy to clipboard, switch view to plain text mode 

Qt Code: 
  1. QWidget* ItemDelegate::createEditor(QWidget *parent,
  2.      const QStyleOptionViewItem & option ,
  3.      const QModelIndex & index ) const {
  4.  
  5.   QVariant data =  index.model()->data(index, Qt::EditRole);
  6.  
  7.   QWidget* editor;    
  8.   switch( data.type() ) {
  9.     case QVariant::StringList:
  10.       editor = new QComboBox(parent);
  11.       dynamic_cast<QComboBox*>(editor)->setFrame(false);
  12.       break;
  13.     default:
  14.       editor = QStyledItemDelegate::createEditor(parent, option, index);
  15.   }
  16.  
  17.   return editor;
  18. }
  19.  
  20. void ItemDelegate::setEditorData(QWidget *editor,
  21.                                      const QModelIndex &index) const {
  22.  
  23.   QVariant data = index.model()->data(index, Qt::EditRole);
  24.  
  25.   switch( data.type() ) {
  26.     case QVariant::StringList:
  27.       static_cast<QComboBox*>(editor)->addItems(data.toStringList());
  28.       break;
  29.     default:
  30.       QStyledItemDelegate::setEditorData(editor, index);
  31.   }
  32. }
  33.  
  34.  void ItemDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
  35.                                     const QModelIndex &index) const
  36.  {
  37.    QVariant data = index.model()->data(index, Qt::EditRole);
  38.  
  39.   switch( data.type() ) {
  40.     case QVariant::StringList: {
  42.       for( int i = 0; i < static_cast<QComboBox*>(editor)->count(); ++i )
  43.         list << static_cast<QComboBox*>(editor)->itemText(i);
  44.       model->setData(index, QVariant(list), Qt::EditRole);
  45.       break;
  46.     }
  47.     default:
  48.       QStyledItemDelegate::setModelData(editor, model, index);
  49.   }  
  50. }
To copy to clipboard, switch view to plain text mode