1 files changed, 40 insertions, 0 deletions
diff --git a/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h b/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h
index 6bafbc8..b6f782d 100644
--- a/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h
+++ b/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h
@@ -142,6 +142,46 @@ static inline bool qt_notclosestLeaf(const QGraphicsItem *item1, const QGraphics
 }
 
 
+static inline bool QRectF_intersects(const QRectF &s, const QRectF &r)
+{
+    qreal xp = s.left();
+    qreal yp = s.top();
+    qreal w = s.width();
+    qreal h = s.height();
+    qreal l1 = xp;
+    qreal r1 = xp;
+    if (w < 0)
+        l1 += w;
+    else
+        r1 += w;
+
+    qreal l2 = r.left();
+    qreal r2 = r.left();
+    if (w < 0)
+        l2 += r.width();
+    else
+        r2 += r.width();
+
+    if (l1 >= r2 || l2 >= r1)
+        return false;
+
+    qreal t1 = yp;
+    qreal b1 = yp;
+    if (h < 0)
+        t1 += h;
+    else
+        b1 += h;
+
+    qreal t2 = r.top();
+    qreal b2 = r.top();
+    if (r.height() < 0)
+        t2 += r.height();
+    else
+        b2 += r.height();
+
+    return !(t1 >= b2 || t2 >= b1);
+}
+
 QT_END_NAMESPACE
 
 #endif // QGRAPHICSSCENEBSPTREEINDEX_P_H