How to disable 'x' close button

nicholaslee

this->setWindowFlags(Qt::CustomizeWindowHint | Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint);

I tried this but it doesn't work. The reason why i want to disable it is because my app downloads files and if the user closes window 1 before the download finishes, window 2 lags and crashes. Only happens during download.

J.Hilk

hi @nicholaslee
the easiest would probably be to overwride the close event. something like this:

adjusted from the Application Example

void MainWindow::closeEvent(QCloseEvent *event)
{
    if (downloadOngoing()) {
        event->ignore()
    } else {
        event->accept();
    }
}

raven-worx

@nicholaslee
when do you call this method exactly?

What happens with this:

this->setWindowFlags( (Qt::CustomizeWindowHint | Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint) & ~Qt::WindowCloseButtonHint );

nicholaslee

@J-Hilk I just tried closeevent but oops i already used it and when i build it again qt says closeevent cannot be overloaded.

@raven-worx

DownloaderUI::DownloaderUI(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::DownloaderUI)
{
    ui->setupUi(this);
    this->setWindowTitle("    Offline IVLE");
    this->setWindowIcon(QPixmap(":/icons/OIVLE.png"));
    this->setWindowFlags( (Qt::CustomizeWindowHint | Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint) & ~Qt::WindowCloseButtonHint );

I am calling it in my constructor when i setup the ui. My window title and icon works but the setwindowsflag does nothing. No difference in my app.

Thank you all for helping!

raven-worx

@nicholaslee
on what system are you actually on?

jsulm

@nicholaslee said in How to disable 'x' close button:

closeevent cannot be overloaded

You need to override it not overload

nicholaslee

@raven-worx
I am on windows, qt5.0.2, creator 4.6.2.

@jsulm @J-Hilk Noted. Actually how do I check if there is a downloadongoing? My download is set using a timer. Every hour it downloads. I tried to key in the code below, i added xxxx=1 at the top of my download function and xxxx=0 at the end of it. My app crashes instead.

void IVLEFetcher::closeEvent(QCloseEvent *event){
    if (xxxx==0){
        event->accept();
    } else {
        if (xxxx==1){
            event->ignore();
        }
    }
}

jsulm

@nicholaslee said in How to disable 'x' close button:

My app crashes instead

Where does it crash? Did you debug?