QTextEdit+resize text on wheel event

[gaczm]

I want to have text editor widget that resize text on mouse wheel scroll (like in Qt Creator for example). So I made my class:

class MyTextEdit : public QTextEdit 
{
      Q_OBJECT
 
   public:
      MyTextEdit(QWidget* parent = 0) :
         QTextEdit(parent),
         fontSize(8) 
      {
         connect(this, SIGNAL(fontSizeChanged(qreal)), this, SLOT(setFontPointSize(qreal)));
      }
 
   signals:
      void fontSizeChanged(qreal);
 
   protected:
      void wheelEvent(QWheelEvent* e) 
      {
         if ((e->modifiers() == Qt::ControlModifier) && (e->delta() > 0)) 
         {
            fontSize += 0.5;
            emit fontSizeChanged(fontSize);
            std::cout << fontSize << " " << fontPointSize () << std::endl;
         }
         else if ((e->modifiers() == Qt::ControlModifier) && (e->delta() < 0) && (fontSize > 0.5)) 
         {
            fontSize -= 0.5;
            emit fontSizeChanged(fontSize);
            std::cout << fontSize << " " << fontPointSize () << std::endl;
         }
         else
            QTextEdit::wheelEvent(e);
      }
 
   private:
      qreal fontSize;
};

class MyTextEdit : public QTextEdit 
{
      Q_OBJECT

   public:
      MyTextEdit(QWidget* parent = 0) :
         QTextEdit(parent),
         fontSize(8) 
      {
         connect(this, SIGNAL(fontSizeChanged(qreal)), this, SLOT(setFontPointSize(qreal)));
      }

   signals:
      void fontSizeChanged(qreal);

   protected:
      void wheelEvent(QWheelEvent* e) 
      {
         if ((e->modifiers() == Qt::ControlModifier) && (e->delta() > 0)) 
         {
            fontSize += 0.5;
            emit fontSizeChanged(fontSize);
            std::cout << fontSize << " " << fontPointSize () << std::endl;
         }
         else if ((e->modifiers() == Qt::ControlModifier) && (e->delta() < 0) && (fontSize > 0.5)) 
         {
            fontSize -= 0.5;
            emit fontSizeChanged(fontSize);
            std::cout << fontSize << " " << fontPointSize () << std::endl;
         }
         else
            QTextEdit::wheelEvent(e);
      }

   private:
      qreal fontSize;
};

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But it don't work. Can anyone help? :-)

---
Sorry for bad english, hope it is understandable

[Lykurg]

What does not work? Are your if and else are called? Why do you use a custom signal? You can call setFontPointSize directly.

[gaczm]

What does not work?

Text is not resizing.

Why do you use a custom signal? You can call setFontPointSize directly.

Well, I tried but it also don't works.

It is little weird for me, becouse when i call setFontPointSize function in constructor for example it works, but when i call it in wheelEvent function it don't.