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Document QScreen::grabWindow high-DPI behavior 

Change-Id: Ib32510ff30e907365e64921fda14e686a495c77c
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
bb10
Morten Johan Sørvig 2018-09-25 13:37:20 +02:00 committed by Liang Qi
parent b26ce2f0bf
commit c9f375f4e3
1 changed files with 5 additions and 0 deletions
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5
src/gui/kernel/qscreen.cpp
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@ -701,6 +701,11 @@ void QScreenPrivate::updatePrimaryOrientation()
border of the window. If \a height is negative, the function
copies everything to the bottom of the window.
The offset and size arguments are specified in device independent
pixels. The returned pixmap may be larger than the requested size
when grabbing from a high-DPI screen. Call QPixmap::devicePixelRatio()
to determine if this is the case.
The window system identifier (\c WId) can be retrieved using the
QWidget::winId() function. The rationale for using a window
identifier and not a QWidget, is to enable grabbing of windows