Table Of Contents

Previous topic

QLineEdit

Next topic

QLabel

QLCDNumber

Inheritance diagram of QLCDNumber

Synopsis

Functions

Slots

Signals

Detailed Description

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

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 PySide.QtGui.QLCDNumber.display() slot, which is overloaded to take any of five argument types.

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

PySide.QtGui.QLCDNumber emits the PySide.QtGui.QLCDNumber.overflow() signal when it is asked to display something beyond its range. The range is set by PySide.QtGui.QLCDNumber.setDigitCount() , but PySide.QtGui.QLCDNumber.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. PySide.QtGui.QLCDNumber substitutes spaces for illegal characters.

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

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

PySide/QtGui/../../../../../../../src/qt-everywhere-opensource-src-4.7.2/doc/src/images/motif-lcdnumber.png..image::../../../../../../../src/qt-everywhere-opensource-src-4.7.2/doc/src/images/cde-lcdnumber.png..image::../../../../../../../src/qt-everywhere-opensource-src-4.7.2/doc/src/images/windows-lcdnumber.png..image::../../../../../../../src/qt-everywhere-opensource-src-4.7.2/doc/src/images/windowsxp-lcdnumber.png..image::../../../../../../../src/qt-everywhere-opensource-src-4.7.2/doc/src/images/macintosh-lcdnumber.png..image::../../../../../../../src/qt-everywhere-opensource-src-4.7.2/doc/src/images/plastique-lcdnumber.png
LCD number widgets shown in various widget styles (from left to right): Motif , CDE , Windows , Windows XP , Macintosh , Plastique .

See also

PySide.QtGui.QLabel PySide.QtGui.QFrame Digital Clock Example Tetrix Example

class PySide.QtGui.QLCDNumber([parent=None])
class PySide.QtGui.QLCDNumber(numDigits[, parent=None])
Parameters:

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 PySide.QtGui.QLCDNumber.segmentStyle() is set to Outline .

The parent argument is passed to the PySide.QtGui.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 PySide.QtGui.QLCDNumber.segmentStyle() is set to Filled .

The parent argument is passed to the PySide.QtGui.QFrame constructor.

PySide.QtGui.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.

PySide.QtGui.QLCDNumber.SegmentStyle

This type determines the visual appearance of the PySide.QtGui.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.
PySide.QtGui.QLCDNumber.checkOverflow(num)
Parameters:numPySide.QtCore.double
Return type:PySide.QtCore.bool

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

PySide.QtGui.QLCDNumber.checkOverflow(num)
Parameters:numPySide.QtCore.int
Return type:PySide.QtCore.bool

This is an overloaded function.

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

PySide.QtGui.QLCDNumber.digitCount()
Return type:PySide.QtCore.int

This property holds the current number of digits displayed.

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

By default, this property contains a value of 5.

PySide.QtGui.QLCDNumber.display(num)
Parameters:numPySide.QtCore.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.

PySide.QtGui.QLCDNumber.display(num)
Parameters:numPySide.QtCore.int

This is an overloaded function.

Displays the number num .

PySide.QtGui.QLCDNumber.display(str)
Parameters:str – unicode

Displays the number represented by the string s .

This version of the function disregards PySide.QtGui.QLCDNumber.mode() and PySide.QtGui.QLCDNumber.smallDecimalPoint() .

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. PySide.QtGui.QLCDNumber substitutes spaces for illegal characters.

PySide.QtGui.QLCDNumber.intValue()
Return type:PySide.QtCore.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.

PySide.QtGui.QLCDNumber.mode()
Return type:PySide.QtGui.QLCDNumber.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.

PySide.QtGui.QLCDNumber.numDigits()
Return type:PySide.QtCore.int

This property holds the current number of digits displayed.

PySide.QtGui.QLCDNumber.overflow()
PySide.QtGui.QLCDNumber.segmentStyle()
Return type:PySide.QtGui.QLCDNumber.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 QPalette.light() and QPalette.dark() for shadow effects.

PySide.QtGui.QLCDNumber.setBinMode()

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

PySide.QtGui.QLCDNumber.setDecMode()

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

PySide.QtGui.QLCDNumber.setDigitCount(nDigits)
Parameters:nDigitsPySide.QtCore.int

This property holds the current number of digits displayed.

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

By default, this property contains a value of 5.

PySide.QtGui.QLCDNumber.setHexMode()

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

PySide.QtGui.QLCDNumber.setMode(arg__1)
Parameters:arg__1PySide.QtGui.QLCDNumber.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.

PySide.QtGui.QLCDNumber.setNumDigits(nDigits)
Parameters:nDigitsPySide.QtCore.int

This property holds the current number of digits displayed.

PySide.QtGui.QLCDNumber.setOctMode()

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

PySide.QtGui.QLCDNumber.setSegmentStyle(arg__1)
Parameters:arg__1PySide.QtGui.QLCDNumber.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 QPalette.light() and QPalette.dark() for shadow effects.

PySide.QtGui.QLCDNumber.setSmallDecimalPoint(arg__1)
Parameters:arg__1PySide.QtCore.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.

PySide.QtGui.QLCDNumber.smallDecimalPoint()
Return type:PySide.QtCore.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.

PySide.QtGui.QLCDNumber.value()
Return type:PySide.QtCore.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.