Qt 4.6: imagedelegate.cpp Example File (widgets/icons/imagedelegate.cpp)

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# imagedelegate.cpp Example File
widgets/icons/imagedelegate.cpp

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     #include <QtGui>

     #include "imagedelegate.h"

     ImageDelegate::ImageDelegate(QObject *parent)
         : QItemDelegate(parent)
     {
     }

     QWidget *ImageDelegate::createEditor(QWidget *parent,
                                          const QStyleOptionViewItem & /* option */,
                                          const QModelIndex &index) const
     {
         QComboBox *comboBox = new QComboBox(parent);
         if (index.column() == 1) {
             comboBox->addItem(tr("Normal"));
             comboBox->addItem(tr("Active"));
             comboBox->addItem(tr("Disabled"));
             comboBox->addItem(tr("Selected"));
         } else if (index.column() == 2) {
             comboBox->addItem(tr("Off"));
             comboBox->addItem(tr("On"));
         }

         connect(comboBox, SIGNAL(activated(int)), this, SLOT(emitCommitData()));

         return comboBox;
     }

     void ImageDelegate::setEditorData(QWidget *editor,
                                       const QModelIndex &index) const
     {
         QComboBox *comboBox = qobject_cast<QComboBox *>(editor);
         if (!comboBox)
             return;

         int pos = comboBox->findText(index.model()->data(index).toString(),
                                      Qt::MatchExactly);
         comboBox->setCurrentIndex(pos);
     }

     void ImageDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
                                      const QModelIndex &index) const
     {
         QComboBox *comboBox = qobject_cast<QComboBox *>(editor);
         if (!comboBox)
             return;

         model->setData(index, comboBox->currentText());
     }

     void ImageDelegate::emitCommitData()
     {
         emit commitData(qobject_cast<QWidget *>(sender()));
     }