Deleting items from the model can now be made undone/redone.

model/commands/removerowscommand.cpp

@@ -0,0 +1,47 @@
+#include "removerowscommand.h"
+
+#include <QDebug>
+
+#include "../tablemodel.h"
+
+RemoveRowsCommand::RemoveRowsCommand(TableModel* model,
+                                     const int startRow,
+                                     const int nRows,
+                                     QUndoCommand* parent)
+    : QUndoCommand(parent)
+    , m_tableModel(model)
+    , m_startRow(startRow) {
+  qInfo() << "New RemoveCommand...";
+  const QString commandText =
+      QString("removing %1 item(s) on position %2").arg(nRows).arg(startRow);
+  setText(commandText);
+
+  for (int row = 0; row < nRows; ++row) {
+    const int rowPosition = startRow + row;
+    QModelIndex index     = m_tableModel->index(rowPosition, 0);
+
+    // TODO use a (static) function "getRoleValueHash" or something
+    QHash<int, QVariant> values;
+    values[TableModel::NameRole]        = m_tableModel->data(index, TableModel::NameRole);
+    values[TableModel::DescriptionRole] = m_tableModel->data(index, TableModel::DescriptionRole);
+    values[TableModel::InfoRole]        = m_tableModel->data(index, TableModel::InfoRole);
+    values[TableModel::AmountRole]      = m_tableModel->data(index, TableModel::AmountRole);
+    values[TableModel::FactorRole]      = m_tableModel->data(index, TableModel::FactorRole);
+
+    m_valueList.append(values);
+  }
+}
+
+void RemoveRowsCommand::undo() {
+  qDebug() << "Undoing the RemoveCommand...";
+  if (m_tableModel) {
+    m_tableModel->execInsertItems(m_startRow, m_valueList);
+  }
+}
+
+void RemoveRowsCommand::redo() {
+  qDebug() << "(Re-)doing the RemoveCommand...";
+  if (m_tableModel) {
+    m_tableModel->execRemoveItems(m_startRow, m_valueList.length());
+  }
+}