Can't resize QWindow

[MartinChan 0]

I want to create a QWindow which size is 1920*1080 but I can't,the result is here

Here is my test code:

#include <QGuiApplication>
#include <QWindow>
#include <QApplication>
#include <QDesktopWidget>
#include <QDebug>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QWindow win;
    win.resize(1920,1080);
    win.show();

    qDebug()<<QString("The width of screen is %1 and height is %2").
              arg(QApplication::desktop()->width()).
              arg(QApplication::desktop()->height());
    qDebug()<<QString("The width of QWindow is %1 and height is %2").
              arg(win.width()).
              arg(win.height());
    qDebug()<<QString("The tolerance width of QWindow is %1 and height is %2").
              arg(win.maximumWidth()).
              arg(win.maximumHeight());
    return a.exec();
}

Who can tell me why I can't create a 1920*1080 QWindow?

[mrjj]

hi
Your screen is not big enough.
So window is re scaled to fit 1366x768
try
setFixedSize(1920, 1080);

[MartinChan 0]

I use the subclass of QWindow rather than QWidget,so it didn't have a setFixedSize function...So using the subclass of QWidget is the only way to solve this problem?

[mrjj]

@MartinChan-0 said in Can't resize QWindow:

QWindow

I have not used QWindow as its used for openGL and native windows.
If you need such features, QWidgets will not work.

Why do u want the window to be bigger than the MAX screen ?

[MartinChan 0]

@mrjj
Firstly,I find a easy way to solve this problem :-) ,you can set a minimum size of a QWindow use

win.minimumSize(QSize(1920,1080));

to set its size.

Secondly, I use it because I want to generate a 1920*1080 picture ,and I have to use OpenGL to draw it (to do some job like anti-aliasing)

Thank you @mrjj anyway~

[mrjj]

@MartinChan-0
Ok, that way.
Well then set Minimum should work just fine.