QLCDNumber

The QLCDNumber widget displays a number with LCD-like digits. More

Inheritance diagram of PySide2.QtWidgets.QLCDNumber

Synopsis

Functions

Slots

Signals

Detailed Description

../../_images/windows-lcdnumber.png

It can display a number in just about any size. It can display decimal, hexadecimal, octal or binary numbers. It is easy to connect to data sources using the display() slot, which is overloaded to take any of five argument types.

There are also slots to change the base with setMode() and the decimal point with setSmallDecimalPoint() .

QLCDNumber emits the overflow() signal when it is asked to display something beyond its range. The range is set by setDigitCount() , but setSmallDecimalPoint() also influences it. If the display is set to hexadecimal, octal or binary, the integer equivalent of the value is displayed.

These digits and other symbols can be shown: 0/O, 1, 2, 3, 4, 5/S, 6, 7, 8, 9/g, minus, decimal point, A, B, C, D, E, F, h, H, L, o, P, r, u, U, Y, colon, degree sign (which is specified as single quote in the string) and space. QLCDNumber substitutes spaces for illegal characters.

It is not possible to retrieve the contents of a QLCDNumber object, although you can retrieve the numeric value with value() . If you really need the text, we recommend that you connect the signals that feed the display() slot to another slot as well and store the value there.

Incidentally, QLCDNumber is the very oldest part of Qt, tracing its roots back to a BASIC program on the Sinclair Spectrum .

class PySide2.QtWidgets.QLCDNumber([parent=None])

PySide2.QtWidgets.QLCDNumber(numDigits[, parent=None])

param parent

PySide2.QtWidgets.QWidget

param numDigits

uint

Constructs an LCD number, sets the number of digits to 5, the base to decimal, the decimal point mode to ‘small’ and the frame style to a raised box. The segmentStyle() is set to Outline .

The parent argument is passed to the QFrame constructor.

Constructs an LCD number, sets the number of digits to numDigits , the base to decimal, the decimal point mode to ‘small’ and the frame style to a raised box. The segmentStyle() is set to Filled .

The parent argument is passed to the QFrame constructor.

PySide2.QtWidgets.QLCDNumber.Mode

This type determines how numbers are shown.

Constant

Description

QLCDNumber.Hex

Hexadecimal

QLCDNumber.Dec

Decimal

QLCDNumber.Oct

Octal

QLCDNumber.Bin

Binary

If the display is set to hexadecimal, octal or binary, the integer equivalent of the value is displayed.

PySide2.QtWidgets.QLCDNumber.SegmentStyle

This type determines the visual appearance of the QLCDNumber widget.

Constant

Description

QLCDNumber.Outline

gives raised segments filled with the background color.

QLCDNumber.Filled

gives raised segments filled with the windowText color.

QLCDNumber.Flat

gives flat segments filled with the windowText color.

PySide2.QtWidgets.QLCDNumber.checkOverflow(num)
Parameters

num – int

Return type

bool

This is an overloaded function.

Returns true if num is too big to be displayed in its entirety; otherwise returns false .

PySide2.QtWidgets.QLCDNumber.checkOverflow(num)
Parameters

numdouble

Return type

bool

Returns true if num is too big to be displayed in its entirety; otherwise returns false .

PySide2.QtWidgets.QLCDNumber.digitCount()
Return type

int

This property holds the current number of digits displayed.

Corresponds to the current number of digits. If smallDecimalPoint is false, the decimal point occupies one digit position.

By default, this property contains a value of 5.

PySide2.QtWidgets.QLCDNumber.display(str)
Parameters

str – str

PySide2.QtWidgets.QLCDNumber.display(num)
Parameters

num – int

This is an overloaded function.

Displays the number num .

PySide2.QtWidgets.QLCDNumber.display(num)
Parameters

numdouble

This property holds the displayed value.

This property corresponds to the current value displayed by the LCDNumber.

If the displayed value is not a number, the property has a value of 0.

By default, this property contains a value of 0.

PySide2.QtWidgets.QLCDNumber.intValue()
Return type

int

This property holds the displayed value rounded to the nearest integer.

This property corresponds to the nearest integer to the current value displayed by the LCDNumber. This is the value used for hexadecimal, octal and binary modes.

If the displayed value is not a number, the property has a value of 0.

By default, this property contains a value of 0.

PySide2.QtWidgets.QLCDNumber.mode()
Return type

Mode

This property holds the current display mode (number base).

Corresponds to the current display mode, which is one of Bin , Oct , Dec (the default) and Hex . Dec mode can display floating point values, the other modes display the integer equivalent.

PySide2.QtWidgets.QLCDNumber.overflow()
PySide2.QtWidgets.QLCDNumber.segmentStyle()
Return type

SegmentStyle

This property holds the style of the LCDNumber.

Style

Result

Outline

Produces raised segments filled with the background color

Filled (this is the default).

Produces raised segments filled with the foreground color.

Flat

Produces flat segments filled with the foreground color.

Outline and Filled will additionally use light() and dark() for shadow effects.

PySide2.QtWidgets.QLCDNumber.setBinMode()

Calls setMode (Bin). Provided for convenience (e.g. for connecting buttons to it).

PySide2.QtWidgets.QLCDNumber.setDecMode()

Calls setMode (Dec). Provided for convenience (e.g. for connecting buttons to it).

PySide2.QtWidgets.QLCDNumber.setDigitCount(nDigits)
Parameters

nDigits – int

This property holds the current number of digits displayed.

Corresponds to the current number of digits. If smallDecimalPoint is false, the decimal point occupies one digit position.

By default, this property contains a value of 5.

PySide2.QtWidgets.QLCDNumber.setHexMode()

Calls setMode (Hex). Provided for convenience (e.g. for connecting buttons to it).

PySide2.QtWidgets.QLCDNumber.setMode(arg__1)
Parameters

arg__1Mode

This property holds the current display mode (number base).

Corresponds to the current display mode, which is one of Bin , Oct , Dec (the default) and Hex . Dec mode can display floating point values, the other modes display the integer equivalent.

PySide2.QtWidgets.QLCDNumber.setOctMode()

Calls setMode (Oct). Provided for convenience (e.g. for connecting buttons to it).

PySide2.QtWidgets.QLCDNumber.setSegmentStyle(arg__1)
Parameters

arg__1SegmentStyle

This property holds the style of the LCDNumber.

Style

Result

Outline

Produces raised segments filled with the background color

Filled (this is the default).

Produces raised segments filled with the foreground color.

Flat

Produces flat segments filled with the foreground color.

Outline and Filled will additionally use light() and dark() for shadow effects.

PySide2.QtWidgets.QLCDNumber.setSmallDecimalPoint(arg__1)
Parameters

arg__1 – bool

This property holds the style of the decimal point.

If true the decimal point is drawn between two digit positions. Otherwise it occupies a digit position of its own, i.e. is drawn in a digit position. The default is false.

The inter-digit space is made slightly wider when the decimal point is drawn between the digits.

See also

mode

PySide2.QtWidgets.QLCDNumber.smallDecimalPoint()
Return type

bool

This property holds the style of the decimal point.

If true the decimal point is drawn between two digit positions. Otherwise it occupies a digit position of its own, i.e. is drawn in a digit position. The default is false.

The inter-digit space is made slightly wider when the decimal point is drawn between the digits.

See also

mode

PySide2.QtWidgets.QLCDNumber.value()
Return type

double

This property holds the displayed value.

This property corresponds to the current value displayed by the LCDNumber.

If the displayed value is not a number, the property has a value of 0.

By default, this property contains a value of 0.