How to use the size() function in QT Creator?

Question

Programming

Hello!
In QT Creator I want to add a button and set its size

QPushButton *button=new QPushButton(this);
button->size(Что сюда нужно писать?);

Usually sizes are written with a comma size(100,100) but I keep getting an error...
How to use this function correctly? If possible an example. Thank you!

Answer 1

It's not that function. To set the size, you need setGeometry .
It is passed 4 numbers - the coordinates of the upper left corner and the dimensions in pixels.
Or an instance of the QRect class that specifies the position.
In fact, there is no need to resort to this function, the UI must be built so that QT itself sets the size and position of the controls on the form: qtdocs.narod.ru/4.1.0/doc/html/layout.html

Answer 2

QPushButton, like any other widget, has several functions for setting the size:
setMinimumSize(); setMaximumSize(); setFixedSize();
and in them, as you wrote, set the size exactly like this:

QPushButton *button=new QPushButton(this);
button->setFixedSize(100,100);

The size() function returns the current size of the button.