Is it possible to draw a colored rectangle on a pushButton?

[Prmego]

I want after choosing a color from the QColorDialog put a rectangle (as a preview) on the PushButton and change its color to the color which I have chosen.

The PushButton before choosing the color:

The PushButton after choosing the color:

Is it possible to draw a colored rectangle on a pushButton, and how can I do that (an example)?

[mrjj]

Hi
Yes its possible by just subclassing the button and make a new paintEvent function.
However, what about the text.?
Anyway a quick way is just keep a copy and reset it back if needed.

Test project with subclass
https://www.dropbox.com/s/0vv85gv1zan9xl4/mycolorbutt.zip?dl=0

void ColorButton::paintEvent(QPaintEvent* event) {
  QPushButton::paintEvent(event); // call base paint
  if (!text().isEmpty()) { return; } // if it still show text we dont paint color
  QPainter p(this);
  QBrush b(Color);
  p.setBrush(b);
  QRect colorRect(rect());
  int reduced = width() / 4;
  QMargins m(reduced, 2, reduced, 2) ;
  colorRect = colorRect.marginsRemoved(m);
  p.fillRect( colorRect, b );
}

[Prmego]

@mrjj : Thank you for your answer.

[mrjj]

@Prmego
np. please mark as solved if possible.