The way to display a window using "virtualGeometry" of Qscreen in Qt Widget

morita

Hello. I have three screens. And I try to display a window using virtualGeometry of QScreen in Qt Widget.

But I can not correctly display a window .Because a widnow is displayed on only a primary screen.

Do you know how to solve it ?

For example, in case of QML , If I use the following code , I can display a window on a proper screen.

/////////////////////////////////////////////////
Window {
visible: true
width: 640
height: 480
title: qsTr("Hello World")
screen:Qt.application.screens[0] //screen number
x:screen.virtualX
y:screen.virtualY
}
/////////////////////////////////////////////////

In accordance with the above way, I tried to display a window using "virtualGeometry" of Qscreen in Qt Widget.

/////////////////////////////////////////////////
ChartDesign::ChartDesign(QWidget *parent)
: QWidget(parent)
, ui(new Ui::ChartDesign)
{
ui->setupUi(this);

//Set Top-Level Window
QWidget::setWindowFlag(Qt::FramelessWindowHint);
QWidget::setWindowFlag(Qt::WindowStaysOnTopHint);

//Set window Color
QPalette Pal(palette());
Pal.setColor(QPalette::Background, "#444343");
this->setAutoFillBackground(true);
this->setPalette(Pal);

QScreen *screen = QGuiApplication::screens()[1]; //→Screen numbers 0,1,2
QRect desktop = screen->virtualGeometry();
this->setGeometry(desktop);

// this->move(screen->geometry().x(), screen->geometry().y());
this->move(screen->virtualGeometry().x(), screen->virtualGeometry().y());

qDebug() << "screen->availableVirtualGeometry().x():" << screen->availableVirtualGeometry().x();
this->resize(800, 400);
ui->frame->setStyleSheet("background-color:green;");
this->show();

}
///////////////////////////////////

If I use geometry of QScreen , I can display it .

mrjj

Hi
virtualGeometry normally returns the extended desktop
like 0,0-5770,1080
(for 3 screens)

So i wonder if you want to use screen->availableGeometry() instead ?
or maybe screen->availableSize()

or you can try like ( include #include <QWindow> )
which have worked fine for me on windows.

QWidget * widget = new QWidget();
widget->show();
widget->windowHandle()->setScreen(qApp->screens()[1]);
widget->showFullScreen();

morita

@mrjj
Thank you for replying . I may misunderstand virtualGeometry().

I guess a same way to get x or y coordinate using screen and screen.virtualX from screen in QML , is the way to use screen->geometry().x() in Widget.

Is it correct ?? Because I thought the virtualGeometry() in Widget is same as the screen,virtualX in QML...