Search code examples
c++qtqwidget

QWidget sizeHint()

i have reimplemented(overloaded) a sizeHint() function in a customized QPushButton class like this:

QSize CustQPushButton::sizeHint()const         
{
   QWidget *parentWindow=this->parentWidget(); //a pointer to the parent window   
  return QSize(parentWindow->width()/10,60);
}

the problem is :

When the window is initially displayed the width of my buttons are as expected(1/10 the window), but when the window is resized the buttons are not resized proportionally to the window(the parent). The CustQPushButton Size Policy is set to Fixed/Fixed and my instantiated buttons are inside a QGridLayout.

Can someone please help me?

Solution

  • You don't need custom classes for such a trivial thing. Purpose of size hint is entirely different. Default layouts can handle 1/10 width. You should use QGridLayout::setColumnStretch function. For example, setting stretch factors of two columns to 1 and 9 will resize 1st column to 1/10 of parent (assuming content of the 2nd column can grow enough).