Large desktop for Multiple Display Monitors

[yxtx1984]

There are two ways that multiple monitors may be used: as one large desktop or as a number of independent displays. When used as one large desktop, the monitors create more screen space for applications.

So how can i detect that the desktop is whether make up of multiple monitors or just one monitor? QApplication::desktop()->screenCount() just return 1 for both case.

Is Qt support that? or have to use native API?

Thanks in advance!

[mcosta]

What is the result of QDesktopWidget::isVirtualDesktop()?

[yxtx1984]

QDesktopWidget::isVirtualDesktop() returns true, so????

[high_flyer]

In a virtual desktop you have only one screen, that starches over multiple hardware monitors.

virtualDesktop : const bool

This property holds if the system manages the available screens in a virtual desktop.

For virtual desktops, screen() will always return the same widget. The size of the virtual desktop is the size of this desktop widget.

[budda]

try this

QDesktopWidget * desktop = QApplication::desktop();
 originalPixmap = QPixmap::grabWindow(desktop->winId(), desktop->x(), desktop->y(), desktop->width(), desktop->height());

QDesktopWidget * desktop = QApplication::desktop();
 originalPixmap = QPixmap::grabWindow(desktop->winId(), desktop->x(), desktop->y(), desktop->width(), desktop->height());

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[Spitfire]

Or check width to height ratio.
If it's huge - you have a multiple screen desktop (or veeeery odd screen)