Adding an editor to the already existing list of QItemEditorFactory

[shentian]

Hi

I had the same problem. schall_l's idea to subclass QItemEditorFactory is basically right, but it doesn't work, since QItemEditorFactory ist a base class with no functionality. You have to use the previously installed default factory (which is an instance of the private class QDefaultItemEditorFactory).

class ItemEditorFactory : public QItemEditorFactory
{
public:
  explicit ItemEditorFactory(const QItemEditorFactory* standardFactory);
  virtual QWidget* createEditor(QVariant::Type type, QWidget* parent) const;
  static void installAsStandardFactory();
private:
  const QItemEditorFactory* m_standardFactory;
};

class ItemEditorFactory : public QItemEditorFactory
{
public:
  explicit ItemEditorFactory(const QItemEditorFactory* standardFactory);
  virtual QWidget* createEditor(QVariant::Type type, QWidget* parent) const;
  static void installAsStandardFactory();
private:
  const QItemEditorFactory* m_standardFactory;
};

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ItemEditorFactory::ItemEditorFactory(const QItemEditorFactory* standardFactory)
  : QItemEditorFactory()
  , m_standardFactory(standardFactory)
{
}
 
QWidget* ItemEditorFactory::createEditor(QVariant::Type type, QWidget* parent) const
{
  switch (type)
  {
  case QVariant::Color:
    {
      ColorListEditor *cb = new ColorListEditor(parent);
      cb->setFrame(false);
      return cb;
    }
  default:
    return m_standardFactory->createEditor(type, parent);
  }
}
 
static void ItemEditorFactory::installAsStandardFactory()
{
  QItemEditorFactory::setDefaultFactory(new ItemEditorFactory(QItemEditorFactory::defaultFactory()));
}

ItemEditorFactory::ItemEditorFactory(const QItemEditorFactory* standardFactory)
  : QItemEditorFactory()
  , m_standardFactory(standardFactory)
{
}

QWidget* ItemEditorFactory::createEditor(QVariant::Type type, QWidget* parent) const
{
  switch (type)
  {
  case QVariant::Color:
    {
      ColorListEditor *cb = new ColorListEditor(parent);
      cb->setFrame(false);
      return cb;
    }
  default:
    return m_standardFactory->createEditor(type, parent);
  }
}

static void ItemEditorFactory::installAsStandardFactory()
{
  QItemEditorFactory::setDefaultFactory(new ItemEditorFactory(QItemEditorFactory::defaultFactory()));
}

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Just call ItemEditorFactory::installAsStandardFactory() in your code.

Happy Qoding.