Make QStyle::itemPixmapRect handle devicePixelRatio

Layout sizes for images should be in the form
QSize layoutSize = image.size() / image.devicePixelRatio() to be
in device independent pixels

Change-Id: Ic149144c45c8fa5c45ac5cbe2c82c35d721549cd
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>

1 files changed, 10 insertions, 6 deletions

diff --git a/src/widgets/styles/qstyle.cpp b/src/widgets/styles/qstyle.cpp
index 6072842fc9..5c0064c7a4 100644
--- a/src/widgets/styles/qstyle.cpp
+++ b/src/widgets/styles/qstyle.cpp
@@ -541,17 +541,21 @@ QRect QStyle::itemPixmapRect(const QRect &rect, int alignment, const QPixmap &pi
     QRect result;
     int x, y, w, h;
     rect.getRect(&x, &y, &w, &h);
+
+    const int pixmapWidth = pixmap.width()/pixmap.devicePixelRatio();
+    const int pixmapHeight = pixmap.height()/pixmap.devicePixelRatio();
+
     if ((alignment & Qt::AlignVCenter) == Qt::AlignVCenter)
-        y += h/2 - pixmap.height()/2;
+        y += h/2 - pixmapHeight/2;
     else if ((alignment & Qt::AlignBottom) == Qt::AlignBottom)
-        y += h - pixmap.height();
+        y += h - pixmapHeight;
     if ((alignment & Qt::AlignRight) == Qt::AlignRight)
-        x += w - pixmap.width();
+        x += w - pixmapWidth;
     else if ((alignment & Qt::AlignHCenter) == Qt::AlignHCenter)
-        x += w/2 - pixmap.width()/2;
+        x += w/2 - pixmapWidth/2;
     else if ((alignment & Qt::AlignLeft) != Qt::AlignLeft && QApplication::isRightToLeft())
-        x += w - pixmap.width();
-    result = QRect(x, y, pixmap.width(), pixmap.height());
+        x += w - pixmapWidth;
+    result = QRect(x, y, pixmapWidth, pixmapHeight);
     return result;
 }