QPageLayout: provide op!=

For consistency.

Change-Id: I20fb70999785e2c1947f033d63367a2f6746990a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: John Layt <jlayt@kde.org>

src/gui/painting/qpagelayout.cpp

@@ -443,6 +443,20 @@ bool operator==(const QPageLayout &lhs, const QPageLayout &rhs)
     return (lhs.d == rhs.d);
 }
 
+/*!
+    \fn bool operator!=(const QPageLayout &lhs, const QPageLayout &rhs)
+    \relates QPageLayout
+
+    Returns \c true if page layout \a lhs is not equal to page layout \a rhs,
+    i.e. if any of the attributes differ.
+
+    Note that this is a strict equality, especially for page size where the
+    QPageSize ID, name and size must exactly match, and the margins where the
+    units must match.
+
+    \sa QPageLayout::isEquivalentTo()
+*/
+
 /*!
     Returns \c true if this page layout is equivalent to the \a other page layout,
     i.e. if the page has the same size, margins and orientation.

src/gui/painting/qpagelayout.h

@@ -143,6 +143,8 @@ private:
 Q_DECLARE_SHARED(QPageLayout)
 
 Q_GUI_EXPORT bool operator==(const QPageLayout &lhs, const QPageLayout &rhs);
+inline bool operator!=(const QPageLayout &lhs, const QPageLayout &rhs)
+{ return !operator==(lhs, rhs); }
 
 #ifndef QT_NO_DEBUG_STREAM
 Q_GUI_EXPORT QDebug operator<<(QDebug dbg, const QPageLayout &pageLayout);

tests/auto/gui/painting/qpagelayout/tst_qpagelayout.cpp

@@ -83,8 +83,12 @@ void tst_QPageLayout::basics()
     QCOMPARE(simple.paintRectPoints(), QRect(0, 0, 595, 842));
     QCOMPARE(simple.paintRectPixels(72), QRect(0, 0, 595, 842));
 
+    const QPageLayout a4portrait = simple;
+    QVERIFY(a4portrait == simple);
+
     // Change orientation
     simple.setOrientation(QPageLayout::Landscape);
+    QVERIFY(simple != a4portrait);
     QCOMPARE(simple.orientation(), QPageLayout::Landscape);
     QCOMPARE(simple.margins(), QMarginsF(0, 0, 0, 0));
     QCOMPARE(simple.minimumMargins(), QMarginsF(0, 0, 0, 0));