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//! [0]
QSize t1(10, 12);
t1.scale(60, 60, Qt::IgnoreAspectRatio);
// t1 is (60, 60)

QSize t2(10, 12);
t2.scale(60, 60, Qt::KeepAspectRatio);
// t2 is (50, 60)

QSize t3(10, 12);
t3.scale(60, 60, Qt::KeepAspectRatioByExpanding);
// t3 is (60, 72)
//! [0]


//! [1]
QSize size(100, 10);
size.rwidth() += 20;

// size becomes (120,10)
//! [1]


//! [2]
QSize size(100, 10);
size.rheight() += 5;

// size becomes (100,15)
//! [2]


//! [3]
QSize s( 3, 7);
QSize r(-1, 4);
s += r;

// s becomes (2,11)
//! [3]


//! [4]
QSize s( 3, 7);
QSize r(-1, 4);
s -= r;

// s becomes (4,3)
//! [4]


//! [5]
QSizeF t1(10, 12);
t1.scale(60, 60, Qt::IgnoreAspectRatio);
// t1 is (60, 60)

QSizeF t2(10, 12);
t2.scale(60, 60, Qt::KeepAspectRatio);
// t2 is (50, 60)

QSizeF t3(10, 12);
t3.scale(60, 60, Qt::KeepAspectRatioByExpanding);
// t3 is (60, 72)
//! [5]


//! [6]
QSizeF size(100.3, 10);
size.rwidth() += 20.5;

 // size becomes (120.8,10)
//! [6]


//! [7]
QSizeF size(100, 10.2);
size.rheight() += 5.5;

// size becomes (100,15.7)
//! [7]


//! [8]
QSizeF s( 3, 7);
QSizeF r(-1, 4);
s += r;

// s becomes (2,11)
//! [8]


//! [9]
QSizeF s( 3, 7);
QSizeF r(-1, 4);
s -= r;

// s becomes (4,3)
//! [9]
