Performance with QTableView and QAbstractTableModel

Hello,

At the moment i am developing an apllication for displaying database contents by QTableView and QAbstractTableModel.
For this purpose i wrote a test application to check the performance. I set only 200 rows and 37 columns but the whole applications slows a bit down. Additionaly the selection of cells is relatively slow.
Is there any way to increase the performance of this test application?

Test.h

Code:

---

class Model: public QAbstractTableModel
{
   Q_OBJECT
   public:
      Model();
      virtual int rowCount(   const QModelIndex &parent) const;
      virtual int columnCount(const QModelIndex &parent) const;
      virtual QVariant data(  const QModelIndex &index, int role) const;
      QVariant headerData(
         int section, 
         Qt::Orientation orientation, 
         int role) const;
};
 
class Window: public QMainWindow 
{
   Q_OBJECT
   public:
      Window(QWidget *aParent = 0);
   private:
      QTableView m_view;
      Model m_model;
};

---

Test.cpp

Code:

---

Model::Model()
{
}
 
// 
//-----------------------------------------------------------------------------
int Model::rowCount(const QModelIndex &parent) const
{
   return 200;
}
 
// 
//-----------------------------------------------------------------------------
int Model::columnCount(const QModelIndex &parent) const
{
   return 37;
}
 
// 
//-----------------------------------------------------------------------------
QVariant Model::data(const QModelIndex &index, int role) const
{
   if (role == Qt::DisplayRole)
   {
      return QVariant(QString("%1, %2 esfgsdgsdgsdgsdg")
         .arg(index.row())
         .arg(index.column()));
   }
   return QVariant();
}
 
// 
//-----------------------------------------------------------------------------
QVariant Model::headerData(
   int section, 
   Qt::Orientation orientation, 
   int role) const
{
   if (section < 37)
      return QVariant(QString("Spalte: %1").arg(section));
   else
      return QVariant();
}
 
// 
//-----------------------------------------------------------------------------
Window::Window(QWidget *aParent):
   QMainWindow(aParent),
   m_view(this)
{
   setCentralWidget(&m_view);
   m_view.setModel(&m_model);
   m_view.verticalHeader()->setDefaultSectionSize(17);
}

---

I hope someone can help me.
Thanks in advance.

regards Marco B.

setUniformRowHeights(true) on the view will speed things up.

side note: you should check role in headerData(), too.

doesnt that work only for QTreeView?

I read from the Qt Assistant that setUniformRowHeights(true) is only available on QTreeViews.
Looks like there is no way of speeding up my application :(.