Fix Fusion style combobox dirty lines in HiDPI mode.

Tuned combobox item highlight outline to avoid
dirty lines when painting in HiDPI mode.

Task-number: QTBUG-45600
Change-Id: I3c4aab91b2d32733bd2561424052034a3d9c26a3
Reviewed-by: Marko Kangas <marko.kangas@theqtcompany.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>

1 files changed, 1 insertions, 7 deletions

diff --git a/src/widgets/styles/qfusionstyle.cpp b/src/widgets/styles/qfusionstyle.cpp
index e4302247f5..8405b5ce97 100644
--- a/src/widgets/styles/qfusionstyle.cpp
+++ b/src/widgets/styles/qfusionstyle.cpp
@@ -1536,13 +1536,7 @@ void QFusionStyle::drawControl(ControlElement element, const QStyleOption *optio
                 QRect r = option->rect;
                 painter->fillRect(r, highlight);
                 painter->setPen(QPen(highlightOutline));
-                const QLine lines[4] = {
-                    QLine(QPoint(r.left() + 1, r.bottom()), QPoint(r.right() - 1, r.bottom())),
-                    QLine(QPoint(r.left() + 1, r.top()), QPoint(r.right() - 1, r.top())),
-                    QLine(QPoint(r.left(), r.top()), QPoint(r.left(), r.bottom())),
-                    QLine(QPoint(r.right() , r.top()), QPoint(r.right(), r.bottom())),
-                };
-                painter->drawLines(lines, 4);
+                painter->drawRect(QRectF(r).adjusted(0.5, 0.5, -0.5, -0.5));
             }
             bool checkable = menuItem->checkType != QStyleOptionMenuItem::NotCheckable;
             bool checked = menuItem->checked;