Hi,

I've started a custom model for a treeview, the code for the model is as follows:

Qt Code: 
  1. #include "dacantreemodel.h"
  2.  
  3. DACanTreeModel::DACanTreeModel(QObject *parent)
  5. {
  6. }
  7.  
  8. DACanTreeModel::~DACanTreeModel()
  9. {
  10. }
  11.  
  12. QModelIndex DACanTreeModel::index( int row, int column, const QModelIndex& parent) const
  13. {
  14. 	return QModelIndex();
  15. }
  16.  
  17.  
  18. int DACanTreeModel::rowCount(const QModelIndex &parent) const
  19. {
  20. 	return m_oTreeItems.count();
  21. }
  22.  
  23. int DACanTreeModel::columnCount(const QModelIndex &parent) const
  24. {
  25. 	return 4;
  26. }
  27.  
  28. QVariant DACanTreeModel::data(const QModelIndex &index, int role) const
  29. {
  30. 	QVariant data;
  31.  
  32. 	if (!index.isValid())
  33.          return QVariant();
  34. 	if( role != Qt::DisplayRole )
  35. 		return QVariant();
  36. 	if(index.column() > 4 )
  37. 	{
  38. 		return QVariant();
  39. 	}
  40. 	if( role == Qt::DisplayRole )
  41. 		data = "Test";
  42.  
  43. 	return data;
  44. }
  45.  
  46. QVariant DACanTreeModel::headerData(int section, Qt::Orientation orientation,
  47.                         int role) const
  48. {
  49. 	if (role != Qt::DisplayRole)
  50.          return QVariant();
  51.  
  52. 	if (orientation == Qt::Horizontal)
  53.          return m_Headers[section];
  54.     else
  55.          return QVariant();
  56. }
  57.  
  58.  
  59. QModelIndex DACanTreeModel::parent(const QModelIndex &index) const
  60. {
  61. 	return QModelIndex();
  62. }
  63.  
  64. void DACanTreeModel::setHeaders( QStringList& headers )
  65. {
  66. 	m_Headers = headers;
  67. }
  68.  
  69. void DACanTreeModel::addData( QString strId )
  70. {
  71. 	CMessage* pMess = new CMessage();
  72. 	m_oTreeItems.insert( strId, (QObject*)pMess );
  73. }
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I have a QTreeView which sets the model to the above. When I call addData I want an item to be added to the tree but nothing is happening, I guess I'm missing something here?
In the data function I'm just setting it to 'Test' just to see if this would appear. I have not implemented the index() or the parent() method yet. How do I get something to be put into the tree?

Regards,
Steve