class QDoubleValidator

The QDoubleValidator class provides range checking of floating-point numbers. More…

Inheritance diagram of PySide6.QtGui.QDoubleValidator

Synopsis

Properties

  • bottomᅟ - The validator’s minimum acceptable value

  • decimalsᅟ - The validator’s maximum number of digits after the decimal point

  • notationᅟ - The notation of how a string can describe a number

  • topᅟ - The validator’s maximum acceptable value

Methods

Signals

Note

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Detailed Description

QDoubleValidator provides an upper bound, a lower bound, and a limit on the number of digits after the decimal point.

You can set the acceptable range in one call with setRange() , or with setBottom() and setTop() . Set the number of decimal places with setDecimals() . The validate() function returns the validation state.

QDoubleValidator uses its locale() to interpret the number. For example, in the German locale, “1,234” will be accepted as the fractional number 1.234. In Arabic locales, QDoubleValidator will accept Arabic digits.

Note

The QLocale::NumberOptions set on the locale() also affect the way the number is interpreted. For example, since QLocale::RejectGroupSeparator is not set by default (except on the "C" locale), the validator will accept group separators. If the string passes validation, pass it to locale() .toDouble() to obtain its numeric value.

See also

QIntValidator QRegularExpressionValidator toDouble()Line Edits Example

class Notation

This enum defines the allowed notations for entering a double.

Constant

Description

QDoubleValidator.StandardNotation

The string is written in the standard format, a whole number part optionally followed by a separator and fractional part, for example "0.015".

QDoubleValidator.ScientificNotation

The string is written in scientific form, which optionally appends an exponent part to the standard format, for example "1.5E-2".

The whole number part may, as usual, include a sign. This, along with the separators for fractional part, exponent and any digit-grouping, depend on locale. QDoubleValidator doesn’t check the placement (which would also depend on locale) of any digit-grouping separators it finds, but it will reject input that contains them if QLocale::RejectGroupSeparator is set in locale().numberOptions().

See also

negativeSign()

Note

Properties can be used directly when from __feature__ import true_property is used or via accessor functions otherwise.

property bottomᅟ: float

This property holds the validator’s minimum acceptable value.

By default, this property contains a value of -infinity.

See also

setRange()

Access functions:
property decimalsᅟ: int

This property holds the validator’s maximum number of digits after the decimal point.

By default, this property contains a value of -1, which means any number of digits is accepted.

See also

setRange()

Access functions:
property notationᅟ: QDoubleValidator.Notation

This property holds the notation of how a string can describe a number.

By default, this property is set to ScientificNotation .

See also

Notation

Access functions:
property topᅟ: float

This property holds the validator’s maximum acceptable value.

By default, this property contains a value of infinity.

See also

setRange()

Access functions:
__init__([parent=None])
Parameters:

parent – QObject

Constructs a validator object with a parent object that accepts any double.

__init__(bottom, top, decimals[, parent=None])
Parameters:

  • bottom – float

  • top – float

  • decimals – int

  • parent – QObject

Constructs a validator object with a parent object. This validator will accept doubles from bottom to top inclusive, with up to decimals digits after the decimal point.

bottom()
Return type:

float

See also

setBottom()

Getter of property bottomᅟ .

bottomChanged(bottom)
Parameters:

bottom – float

Notification signal of property bottomᅟ .

decimals()
Return type:

int

See also

setDecimals()

Getter of property decimalsᅟ .

decimalsChanged(decimals)
Parameters:

decimals – int

Notification signal of property decimalsᅟ .

notation()
Return type:

Notation

See also

setNotation()

Getter of property notationᅟ .

notationChanged(notation)
Parameters:

notation – Notation

Notification signal of property notationᅟ .

setBottom(arg__1)
Parameters:

arg__1 – float

See also

bottom()

Setter of property bottomᅟ .

setDecimals(arg__1)
Parameters:

arg__1 – int

See also

decimals()

Setter of property decimalsᅟ .

setNotation(arg__1)
Parameters:

arg__1 – Notation

See also

notation()

Setter of property notationᅟ .

setRange(bottom, top)
Parameters:

  • bottom – float

  • top – float

This is an overloaded function.

Sets the validator to accept doubles from minimum to maximum inclusive without changing the number of digits after the decimal point.

setRange(bottom, top, decimals)
Parameters:

  • bottom – float

  • top – float

  • decimals – int

Sets the validator to accept doubles from minimum to maximum inclusive, with at most decimals digits after the decimal point.

Note

Setting the number of decimals to -1 effectively sets it to unlimited. This is also the value used by a default-constructed validator.

setTop(arg__1)
Parameters:

arg__1 – float

See also

top()

Setter of property topᅟ .

top()
Return type:

float

See also

setTop()

Getter of property topᅟ .

topChanged(top)
Parameters:

top – float

Notification signal of property topᅟ .