Qt 5.6 | Qt Widgets | Icons Example | imagedelegate.cpp Example File

Qt 5.6.2 Reference Documentation

# imagedelegate.cpp Example File

widgets/icons/imagedelegate.cpp

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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()));
      }