"从 Qt 窗口中删除标题栏，同时保留默认窗口边框"

Question

I'm trying to remove the default Windows titlebar from my Qt window (QT version 5.12.2 and using C++) while still keeping the window borders. I've more or less achieved this using the flag Qt::CustomizeWindowHint<\/code> . However, this changes the window borders to white lines instead of the default borders.

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

    QApplication application(argc, argv);
    launcher mainWindow;

    //debugChecks();
    mainWindow.setWindowFlags(Qt::Window | Qt::CustomizeWindowHint | Qt::MSWindowsFixedSizeDialogHint);
    mainWindow.setWindowTitle("Test");
    mainWindow.show();

    return application.exec();
}

Answer 1

QPalette and QStyle for Border

Answer 2

Your description isn't really clear. One should not be using a QMainWindow for a logon\/in dialog. Having said that I created an application on Ubuntu 20.04 (should build fine for you as I used qmake). You can download the project zip here<\/a> . When the application starts it looks like this:

Answer 3

You can do something like this

self.setWindowTitle("‎") # Python

‎

mainWindow.setWindowTitle(""); # C/C++

but instead of passing an empty string, pass an empty character. This one worked for me: https://emptycharacter.com/