What actually calls QAbstractionTableModel::insertRows() ?

[jmalicke]

I implemented QAbstractTableModel with the usual:

class PrintIntervalTableModel : public QAbstractTableModel
{
private:
  virtual int rowCount (const QModelIndex & parent = QModelIndex()) const;
  virtual int columnCount (const QModelIndex & parent = QModelIndex()) const;
  virtual QVariant data (const QModelIndex & index, int role = Qt::DisplayRole) const;
  virtual QVariant headerData (int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
  virtual bool setData (const QModelIndex & index, const QVariant & value, int role = Qt::EditRole);
  virtual Qt::ItemFlags flags (const QModelIndex & index) const;
 
  virtual bool insertRows (int position, int rows, const QModelIndex & parent = QModelIndex());
  virtual bool removeRows (int position, int rows, const QModelIndex & parent = QModelIndex());

class PrintIntervalTableModel : public QAbstractTableModel
{
private:
  virtual int rowCount (const QModelIndex & parent = QModelIndex()) const;
  virtual int columnCount (const QModelIndex & parent = QModelIndex()) const;
  virtual QVariant data (const QModelIndex & index, int role = Qt::DisplayRole) const;
  virtual QVariant headerData (int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
  virtual bool setData (const QModelIndex & index, const QVariant & value, int role = Qt::EditRole);
  virtual Qt::ItemFlags flags (const QModelIndex & index) const;

  virtual bool insertRows (int position, int rows, const QModelIndex & parent = QModelIndex());
  virtual bool removeRows (int position, int rows, const QModelIndex & parent = QModelIndex());

To copy to clipboard, switch view to plain text mode 

Here is my insert rows, which is pretty simple:

bool PrintIntervalTableModel::insertRows(int position, int rows, const QModelIndex & parent)
{
  beginInsertRows(QModelIndex(), position, position + rows - 1);
 
  for (int row = 0; row < rows; ++row)
  {
    std::deque<moment_value_pair_type>::iterator it = printIntervalPairs.begin() + position;
    printIntervalPairs.insert(it, moment_value_pair_type());
  }
 
  endInsertRows();
 
  return true;
}

bool PrintIntervalTableModel::insertRows(int position, int rows, const QModelIndex & parent)
{
  beginInsertRows(QModelIndex(), position, position + rows - 1);

  for (int row = 0; row < rows; ++row)
  {
    std::deque<moment_value_pair_type>::iterator it = printIntervalPairs.begin() + position;
    printIntervalPairs.insert(it, moment_value_pair_type());
  }

  endInsertRows();

  return true;
}

To copy to clipboard, switch view to plain text mode 

Now I wonder why I actually did this? Do views (or other components) call this method?

I would like to have a button on the form that, once clicked, inserts a row underneath the user's current selection. Do I basically create a slot in the table (connected to button clicked()) that figures out where to insert the row, and then manually calls table->insertRows()?

[ChrisW67]

Anything that needs to add a row into a model will use insertRows() directly or indirectly. Your code might do that in response to a direct user command (as in the case of your Add Row button). It might happen less directly as the result a paste or drag and drop operation. Your code may use this function while you are loading the initial data into a model (like inserting an entry into a combo box does with the underlying model). If you use the model interface in any sort of internal computation you might insert a result row using this function ( no human or view required)