class QSizeF#

The QSizeF class defines the size of a two-dimensional object using floating point precision. More…

Synopsis#

Methods#

def __init__()
def __reduce__()
def __repr__()
def boundedTo()
def expandedTo()
def grownBy()
def height()
def isEmpty()
def isNull()
def isValid()
def __ne__()
def __mul__()
def __imul__()
def __add__()
def __iadd__()
def __sub__()
def __isub__()
def __div__()
def operator/=()
def __eq__()
def scale()
def scaled()
def setHeight()
def setWidth()
def shrunkBy()
def toSize()
def toTuple()
def transpose()
def transposed()
def width()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description#

A size is specified by a width() and a height() . It can be set in the constructor and changed using the setWidth() , setHeight() , or scale() functions, or using arithmetic operators. A size can also be manipulated directly by retrieving references to the width and height using the rwidth() and rheight() functions. Finally, the width and height can be swapped using the transpose() function.

The isValid() function determines if a size is valid. A valid size has both width and height greater than or equal to zero. The isEmpty() function returns true if either of the width and height is less than (or equal to) zero, while the isNull() function returns true only if both the width and the height is zero.

Use the expandedTo() function to retrieve a size which holds the maximum height and width of this size and a given size. Similarly, the boundedTo() function returns a size which holds the minimum height and width of this size and a given size.

The QSizeF class also provides the toSize() function returning a QSize copy of this size, constructed by rounding the width and height to the nearest integers.

QSizeF objects can be streamed as well as compared.

See also

QSize QPointF QRectF

__init__(sz)#

Parameters:: sz – QSize

Constructs a size with floating point accuracy from the given size.

See also

toSize() toSizeF()

__init__()

Constructs an invalid size.

See also

isValid()

__init__(w, h)

Parameters:

w – float
h – float

Constructs a size with the given finite width and height.

__reduce__()#

Return type:: object

__repr__()#

Return type:: object

boundedTo(arg__1)#

Parameters:: arg__1 – QSizeF
Return type:: QSizeF

Returns a size holding the minimum width and height of this size and the given otherSize.

See also

expandedTo() scale()

expandedTo(arg__1)#

Parameters:: arg__1 – QSizeF
Return type:: QSizeF

Returns a size holding the maximum width and height of this size and the given otherSize.

See also

boundedTo() scale()

grownBy(m)#

Parameters:: m – QMarginsF
Return type:: QSizeF

height()#

Return type:: float

Returns the height.

See also

width() setHeight()

isEmpty()#

Return type:: bool

Returns true if either of the width and height is less than or equal to 0; otherwise returns false.

See also

isNull() isValid()

isNull()#

Return type:: bool

Returns true if both the width and height are 0.0 (ignoring the sign); otherwise returns false.

See also

isValid() isEmpty()

isValid()#

Return type:: bool

Returns true if both the width and height are equal to or greater than 0; otherwise returns false.

See also

isNull() isEmpty()

__ne__(s2)#

Parameters:: s2 – QSizeF
Return type:: bool

Returns true if s1 and s2 are sufficiently different; otherwise returns false.

Warning

This function does not check for strict inequality; instead, it uses a fuzzy comparison to compare the sizes’ extents.

__mul__(c)#

Parameters:: c – float
Return type:: QSizeF

This is an overloaded function.

Multiplies the given size by the given finite factor and returns the result.

See also

scale()

__mul__(c)

Parameters:: c – float
Return type:: QSizeF

This is an overloaded function.

Multiplies the given size by the given finite factor and returns the result.

__imul__(c)#

Parameters:: c – float
Return type:: QSizeF

This is an overloaded function.

Multiplies both the width and height by the given finite factor and returns a reference to the size.

See also

scale()

__add__(s2)#

Parameters:: s2 – QSizeF
Return type:: QSizeF

Returns the sum of s1 and s2; each component is added separately.

__iadd__(arg__1)#

Parameters:: arg__1 – QSizeF
Return type:: QSizeF

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

Adds the given size to this size and returns a reference to this size. For example:

s = QSizeF( 3, 7)
r = QSizeF(-1, 4)
s += r
# s becomes (2,11)

__sub__(s2)#

Parameters:: s2 – QSizeF
Return type:: QSizeF

Returns s2 subtracted from s1; each component is subtracted separately.

__isub__(arg__1)#

Parameters:: arg__1 – QSizeF
Return type:: QSizeF

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

Subtracts the given size from this size and returns a reference to this size. For example:

s = QSizeF( 3, 7)
r = QSizeF(-1, 4)
s -= r
# s becomes (4,3)

__div__(c)#

Parameters:: c – float
Return type:: QSizeF

This is an overloaded function.

Divides the given size by the given divisor and returns the result. The divisor must not be either zero or NaN.

See also

scale()

operator/=(c)

Parameters:: c – float
Return type:: QSizeF

This is an overloaded function.

Divides both the width and height by the given divisor and returns a reference to the size. The divisor must not be either zero or NaN.

See also

scale()

__eq__(s2)#

Parameters:: s2 – QSizeF
Return type:: bool

Returns true if s1 and s2 are approximately equal; otherwise returns false.

Warning

This function does not check for strict equality; instead, it uses a fuzzy comparison to compare the sizes’ extents.