Custom QStyledItemDelegate (QToolButton) - hovering instead of edit

Hello folks,

I've got a little issue with my custom StyledItemDelegate. I have got a list view where I want to add a remove button on the first column. This works pretty good but it is just visible in edit mode, but I want to have it visible when I hover the row.

Can anyone give me a hint how to implement this?

buttondelegate.h

Code:

#ifndef BUTTONDELEGATE_H_
#define BUTTONDELEGATE_H_
 
#include <QStyledItemDelegate>
 
class ButtonDelegate : public QStyledItemDelegate
{
   Q_OBJECT
 
public:
   ButtonDelegate(QObject *aParent);
 
   QWidget *createEditor(
      QWidget *aParent, 
      const QStyleOptionViewItem &aOption,
      const QModelIndex &aIndex) const;
 
   virtual void setEditorData(
      QWidget *aEditor, 
      const QModelIndex &aIndex) const;
 
   virtual void setModelData(
      QWidget *aEditor, 
      QAbstractItemModel *aModel,
      const QModelIndex &aIndex) const;
 
   virtual void updateEditorGeometry(
      QWidget *aEditor,
      const QStyleOptionViewItem &aOption, 
      const QModelIndex &aIndex) const;
 
};
 
#endif

Code:

#include "buttondelegate.h"
 
#include <QToolButton>
#include <QApplication>
 
//-----------------------------------------------------------------------------
ButtonDelegate::ButtonDelegate(QObject *aParent)
   : QStyledItemDelegate(aParent)
{
}
 
//-----------------------------------------------------------------------------
QWidget *ButtonDelegate::createEditor(
   QWidget *aParent, 
   const QStyleOptionViewItem & /*aOption*/, 
   const QModelIndex &aIndex) const
{
   if (aIndex.column() == 0) {
      QToolButton *btn = new QToolButton(aParent);
      btn->setText("...");
      //btn->setAutoRaise(true);
      btn->setCheckable(true);
      btn->setFixedSize(QSize(16, 16));
 
      return btn;
   }
 
   return NULL;
}
 
//-----------------------------------------------------------------------------
void ButtonDelegate::setEditorData(
      QWidget * /*aEditor */, 
      const QModelIndex & /*aIndex*/) const
{
}
 
//-----------------------------------------------------------------------------
void ButtonDelegate::setModelData(
   QWidget *aEditor, 
   QAbstractItemModel *aModel,
   const QModelIndex &aIndex) const
{
   //QApplication::processEvents();
   if (static_cast<QToolButton*>(aEditor)->isChecked())
      aModel->removeRow(aIndex.row());
}
 
//-----------------------------------------------------------------------------
void ButtonDelegate::updateEditorGeometry(
   QWidget *aEditor, 
   const QStyleOptionViewItem &aOption, 
   const QModelIndex & /*aIndex*/) const
{
   aEditor->setGeometry(aOption.rect);
}

And yes I have searched on the forum and found some things but they didn't help.

Kind regards,
Sven