@mcf1lmnfs No, because title bar is not a Qt element, is system made, so I cannot change it via Qt Style Sheets.

@marcbf said in Remember window size before maximization (or Detect if QResizeEvent is maximization):

int w = currentSize.width();
int h = currentSize.height();

if (restoresize)
{
w = qMax(settings["Width"].Value(0), w);
h = qMax(settings["Height"].Value(0), h);
}

Man, this is the deal!!! Everything worked perfectly after I fine tuned your code to my context! Thank you very much.

The trick was really to use normalGeometry and windowState, so these two are the answer to my question.

I need to be as big as the screen.
Before I used this code to display it as big as the screen

int Height = 0; int Width = 0; foreach (QScreen *screen, QGuiApplication::screens()) { if(QGuiApplication::primaryScreen()->name() == screen->name()) { QRect rec = screen->availableGeometry(); Height = rec.height(); Width = rec.width(); } } w.setFixedSize(Width,Height);

Unfortunately, I do not know why, the height is still longer than the screen. This is why I decided to use showMaximized (), unfortunately this does not seem to go well for both systems.

@Bremenpl You're Welcome :) You can mark the post as solved by editing the post title and prepending [Solved].
Happy Coding..