spreadsheetdelegate.cpp Example File

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  #include "spreadsheetdelegate.h"

  #include <QtWidgets>

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

  QWidget *SpreadSheetDelegate::createEditor(QWidget *parent,
                                            const QStyleOptionViewItem &,
                                            const QModelIndex &index) const
  {
      if (index.column() == 1) {
          QDateTimeEdit *editor = new QDateTimeEdit(parent);
          editor->setDisplayFormat("dd/M/yyyy");
          editor->setCalendarPopup(true);
          return editor;
      }

      QLineEdit *editor = new QLineEdit(parent);

      // create a completer with the strings in the column as model
      QStringList allStrings;
      for (int i = 1; i<index.model()->rowCount(); i++) {
          QString strItem(index.model()->data(index.sibling(i, index.column()),
              Qt::EditRole).toString());

          if (!allStrings.contains(strItem))
              allStrings.append(strItem);
      }

      QCompleter *autoComplete = new QCompleter(allStrings);
      editor->setCompleter(autoComplete);
      connect(editor, &QLineEdit::editingFinished, this, &SpreadSheetDelegate::commitAndCloseEditor);
      return editor;
  }

  void SpreadSheetDelegate::commitAndCloseEditor()
  {
      QLineEdit *editor = qobject_cast<QLineEdit *>(sender());
      emit commitData(editor);
      emit closeEditor(editor);
  }

  void SpreadSheetDelegate::setEditorData(QWidget *editor,
      const QModelIndex &index) const
  {
      QLineEdit *edit = qobject_cast<QLineEdit*>(editor);
      if (edit) {
          edit->setText(index.model()->data(index, Qt::EditRole).toString());
          return;
      }

      QDateTimeEdit *dateEditor = qobject_cast<QDateTimeEdit *>(editor);
      if (dateEditor) {
          dateEditor->setDate(QDate::fromString(
                                  index.model()->data(index, Qt::EditRole).toString(),
                                  "d/M/yyyy"));
      }
  }

  void SpreadSheetDelegate::setModelData(QWidget *editor,
      QAbstractItemModel *model, const QModelIndex &index) const
  {
      QLineEdit *edit = qobject_cast<QLineEdit *>(editor);
      if (edit) {
          model->setData(index, edit->text());
          return;
      }

      QDateTimeEdit *dateEditor = qobject_cast<QDateTimeEdit *>(editor);
      if (dateEditor)
          model->setData(index, dateEditor->date().toString("dd/M/yyyy"));
  }