Windows: Add checks to usages of QWindow::screen().

Default to primary screen and handle situations where the screen
is null consistently. Remove unused QWindowsScreen::screenOf() method.

Task-number: QTBUG-48288
Change-Id: I91b3c2331521d9d3be8ac77606ee820cd35ebb0f
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

1 files changed, 0 insertions, 12 deletions

diff --git a/src/plugins/platforms/windows/qwindowsscreen.cpp b/src/plugins/platforms/windows/qwindowsscreen.cpp
index 391735a035..e6abfb2403 100644
--- a/src/plugins/platforms/windows/qwindowsscreen.cpp
+++ b/src/plugins/platforms/windows/qwindowsscreen.cpp
@@ -276,18 +276,6 @@ QWindow *QWindowsScreen::windowAt(const QPoint &screenPoint, unsigned flags)
     return result;
 }
 
-QWindowsScreen *QWindowsScreen::screenOf(const QWindow *w)
-{
-    if (w)
-        if (const QScreen *s = w->screen())
-            if (QPlatformScreen *pscr = s->handle())
-                return static_cast<QWindowsScreen *>(pscr);
-    if (const QScreen *ps = QGuiApplication::primaryScreen())
-        if (QPlatformScreen *ppscr = ps->handle())
-            return static_cast<QWindowsScreen *>(ppscr);
-    return 0;
-}
-
 qreal QWindowsScreen::pixelDensity() const
 {
     const qreal physicalDpi = m_data.geometry.width() / m_data.physicalSizeMM.width() * qreal(25.4);