Problems with CustomEditType

Hi,
i make a custom grideditor like the documentation. In the display mode it works ok, but when i switch to the edit mode i get the exception:

ASSERT: "false" in src\grid\QtnGridTableView.cpp, line 2554

The header file:
#include <QtitanGrid.h>

class GridFormulaEditor : public Qtitan::GridStringEditor
{
Q_OBJECT
public:
GridFormulaEditor();
~GridFormulaEditor();
virtual void paintEvent(QPainter & painter, const GridEditorStyleOption & option);
};

class GridFormulaEditorRepository : public Qtitan::GridEditorRepository
{
public:
GridFormulaEditorRepository();
virtual GridEditor* createEditor();
};

The Source:
GridFormulaEditor::GridFormulaEditor() : Qtitan::GridStringEditor()
{
}

GridFormulaEditor::~GridFormulaEditor()
{
}

void GridFormulaEditor::paintEvent(QPainter & painter, const GridEditorStyleOption & option)
{
QRect rect = option.rect;
rect.adjust(4, 4, -4, -4);
Qtitan::GridStringEditor::paintEvent(painter, option);
}

GridFormulaEditorRepository::GridFormulaEditorRepository()
{
}

GridEditor* GridFormulaEditorRepository::createEditor()
{
return new GridFormulaEditor();
}

and

pColumn->setEditorType(Qtitan::CustomEditType);
pColumn->setEditorRepository(new GridFormulaEditorRepository());

whe i use GridStringEditor instead, the program works.

Could you tell me whats wrong?

This assert means what you have no default value for this editor repository. In your case the best way inherit repository from GridStringEditorRepository.

class GridFormulaEditorRepository : public Qtitan::GridStringEditorRepository
{
}

When i inherit the repository for GridStringEditorRepository it works, but when i a column where in the Qt::ItemFlags ItemIsEditable is not set (ReadOnly) i get the same exception.
How can i solve this?

Please show me the code of the column's editor initialization.

Here is the code:

pColumn->setEditorType(Qtitan::CustomEditType);
pColumn->setEditorRepository(new GridFormulaEditorRepository());

I have solve the problem.