QLCDNumber ¶

概要 ¶

详细描述 ¶

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 发射 overflow() signal when it is asked to display something beyond its range. The range is set by setDigitCount() ，但 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 .

另请参阅

QLabel QFrame 数字时钟范例 俄罗斯方块范例

class QLCDNumber ( [ parent=None ] ) ¶

QLCDNumber(numDigits[, parent=None])

param parent

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 .

parent argument is passed to the QFrame 构造函数。

另请参阅

setDigitCount() setSmallDecimalPoint()

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 .

parent argument is passed to the QFrame 构造函数。

另请参阅

setDigitCount() setSmallDecimalPoint()

PySide2.QtWidgets.QLCDNumber. 模式 ¶

This type determines how numbers are shown.

常量	描述
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 小部件。

常量	描述
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 ) ¶

参数

num – int

返回类型

bool

这是重载函数。

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

另请参阅

display() digitCount() smallDecimalPoint()

PySide2.QtWidgets.QLCDNumber. checkOverflow ( num ) ¶

参数

num – double

返回类型

bool

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

另请参阅

display() digitCount() smallDecimalPoint()

PySide2.QtWidgets.QLCDNumber. digitCount ( ) ¶

返回类型

int

Returns the current number of digits.

另请参阅

setDigitCount()

PySide2.QtWidgets.QLCDNumber. display ( str ) ¶

参数

str – unicode

PySide2.QtWidgets.QLCDNumber. display ( num ) ¶

参数

num – int

这是重载函数。

Displays the number num .

PySide2.QtWidgets.QLCDNumber. display ( num ) ¶

参数

num – double

这是重载函数。

Displays the number num .

PySide2.QtWidgets.QLCDNumber. intValue ( ) ¶

返回类型

int

PySide2.QtWidgets.QLCDNumber. mode ( ) ¶

返回类型

模式

另请参阅

setMode()

PySide2.QtWidgets.QLCDNumber. overflow ( ) ¶

PySide2.QtWidgets.QLCDNumber. segmentStyle ( ) ¶

返回类型

SegmentStyle

另请参阅

setSegmentStyle()

PySide2.QtWidgets.QLCDNumber. setBinMode ( ) ¶

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

另请参阅

setMode() setHexMode() setDecMode() setOctMode() mode()

PySide2.QtWidgets.QLCDNumber. setDecMode ( ) ¶

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

另请参阅

setMode() setHexMode() setOctMode() setBinMode() mode()

PySide2.QtWidgets.QLCDNumber. setDigitCount ( nDigits ) ¶

参数

nDigits – int

Sets the current number of digits to numDigits . Must be in the range 0..99.

另请参阅

digitCount()

PySide2.QtWidgets.QLCDNumber. setHexMode ( ) ¶

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

另请参阅

setMode() setDecMode() setOctMode() setBinMode() mode()

PySide2.QtWidgets.QLCDNumber. setMode ( arg__1 ) ¶

参数

arg__1 – 模式

另请参阅

mode()

PySide2.QtWidgets.QLCDNumber. setOctMode ( ) ¶

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

另请参阅

setMode() setHexMode() setDecMode() setBinMode() mode()

PySide2.QtWidgets.QLCDNumber. setSegmentStyle ( arg__1 ) ¶

参数

arg__1 – SegmentStyle

另请参阅

segmentStyle()

PySide2.QtWidgets.QLCDNumber. setSmallDecimalPoint ( arg__1 ) ¶

参数

arg__1 – bool

另请参阅

smallDecimalPoint()

PySide2.QtWidgets.QLCDNumber. smallDecimalPoint ( ) ¶

返回类型

bool

另请参阅

setSmallDecimalPoint()

PySide2.QtWidgets.QLCDNumber. value ( ) ¶

返回类型

double