2 files changed, 29 insertions, 35 deletions
diff --git a/src/corelib/tools/qrect.cpp b/src/corelib/tools/qrect.cpp
index 2082794..b4fe070 100644
--- a/src/corelib/tools/qrect.cpp
+++ b/src/corelib/tools/qrect.cpp
@@ -2154,48 +2154,42 @@ bool QRectF::contains(const QRectF &r) const
 
 QRectF QRectF::operator|(const QRectF &r) const
 {
-    qreal l1 = xp;
-    qreal r1 = xp;
-    if (w < 0)
-        l1 += w;
-    else
-        r1 += w;
-    if (l1 == r1) // null rect
+    if (isNull())
         return r;
+    if (r.isNull())
+        return *this;
 
-    qreal l2 = r.xp;
-    qreal r2 = r.xp;
-    if (r.w < 0)
-        l2 += r.w;
+    qreal left = xp;
+    qreal right = xp;
+    if (w < 0)
+        left += w;
     else
-        r2 += r.w;
-    if (l2 == r2) // null rect
-        return *this;
+        right += w;
 
-    qreal t1 = yp;
-    qreal b1 = yp;
+    if (r.w < 0) {
+        left = qMin(left, r.xp + r.w);
+        right = qMax(right, r.xp);
+    } else {
+        left = qMin(left, r.xp);
+        right = qMax(right, r.xp + r.w);
+    }
+
+    qreal top = yp;
+    qreal bottom = yp;
     if (h < 0)
-        t1 += h;
+        top += h;
     else
-        b1 += h;
-    if (t1 == b1) // null rect
-        return r;
+        bottom += h;
 
-    qreal t2 = r.yp;
-    qreal b2 = r.yp;
-    if (r.h < 0)
-        t2 += r.h;
-    else
-        b2 += r.h;
-    if (t2 == b2) // null rect
-        return *this;
+    if (r.h < 0) {
+        top = qMin(top, r.yp + r.h);
+        bottom = qMax(bottom, r.yp);
+    } else {
+        top = qMin(top, r.yp);
+        bottom = qMax(bottom, r.yp + r.h);
+    }
 
-    QRectF tmp;
-    tmp.xp = qMin(l1, l2);
-    tmp.yp = qMin(t1, t2);
-    tmp.w = qMax(r1, r2) - tmp.xp;
-    tmp.h = qMax(b1, b2) - tmp.yp;
-    return tmp;
+    return QRectF(left, top, right - left, bottom - top);
 }
 
 /*!
diff --git a/src/corelib/tools/qrect.h b/src/corelib/tools/qrect.h
index 0740fe5..efdc24d 100644
--- a/src/corelib/tools/qrect.h
+++ b/src/corelib/tools/qrect.h
@@ -653,7 +653,7 @@ inline QRectF::QRectF(const QRect &r)
 }
 
 inline bool QRectF::isNull() const
-{ return qIsNull(w) && qIsNull(h); }
+{ return w == 0. && h == 0.; }
 
 inline bool QRectF::isEmpty() const
 { return w <= 0. || h <= 0.; }