Qt 5.9 | Qt Widgets | Spreadsheet | spreadsheetdelegate.cpp Example File

Qt 5.9.9 Reference Documentation

# spreadsheetdelegate.cpp Example File

itemviews/spreadsheet/spreadsheetdelegate.cpp

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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"));
      }