imagedelegate.cpp Example File

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  #include <QtWidgets>

  #include "imagedelegate.h"
  #include "iconpreviewarea.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->addItems(IconPreviewArea::iconModeNames());
      else if (index.column() == 2)
          comboBox->addItems(IconPreviewArea::iconStateNames());

      typedef void (QComboBox::*QComboBoxIntSignal)(int);
      connect(comboBox, static_cast<QComboBoxIntSignal>(&QComboBox::activated),
              this, &ImageDelegate::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()));
  }