QSpinBox ¶

QSpinBox class provides a spin box widget. 更多 …

概要 ¶

函数 ¶

def cleanText ()
def displayIntegerBase ()
def maximum ()
def minimum ()
def prefix ()
def setDisplayIntegerBase (base)
def setMaximum (max)
def setMinimum (min)
def setPrefix (prefix)
def setRange (min, max)
def setSingleStep (val)
def setStepType (stepType)
def setSuffix (suffix)
def singleStep ()
def stepType ()
def suffix ()
def value ()

虚函数 ¶

def textFromValue (val)
def valueFromText (text)

槽 ¶

def setValue (val)

信号 ¶

def textChanged (arg__1)
def valueChanged (arg__1)
def valueChanged (arg__1)

详细描述 ¶

QSpinBox is designed to handle integers and discrete sets of values (e.g., month names); use QDoubleSpinBox 为浮点值。

QSpinBox allows the user to choose a value by clicking the up/down buttons or pressing up/down on the keyboard to increase/decrease the value currently displayed. The user can also type the value in manually. The spin box supports integer values but can be extended to use different strings with validate() , textFromValue() and valueFromText() .

Every time the value changes QSpinBox 发射 valueChanged() and textChanged() signals, the former providing a int and the latter a QString 。 textChanged() signal provides the value with both prefix() and suffix() . The current value can be fetched with value() and set with setValue() .

Clicking the up/down buttons or using the keyboard accelerator’s up and down arrows will increase or decrease the current value in steps of size singleStep() . If you want to change this behaviour you can reimplement the virtual function stepBy() . The minimum and maximum value and the step size can be set using one of the constructors, and can be changed later with setMinimum() , setMaximum() and setSingleStep() .

Most spin boxes are directional, but QSpinBox can also operate as a circular spin box, i.e. if the range is 0-99 and the current value is 99, clicking “up” will give 0 if wrapping() is set to true. Use setWrapping() if you want circular behavior.

The displayed value can be prepended and appended with arbitrary strings indicating, for example, currency or the unit of measurement. See setPrefix() and setSuffix() . The text in the spin box is retrieved with text() (which includes any prefix() and suffix() ), or with cleanText() (which has no prefix() , no suffix() and no leading or trailing whitespace).

It is often desirable to give the user a special (often default) choice in addition to the range of numeric values. See setSpecialValueText() for how to do this with QSpinBox .

子类化 QSpinBox ¶

If using prefix() , suffix() ，和 specialValueText() don’t provide enough control, you subclass QSpinBox and reimplement valueFromText() and textFromValue() . For example, here’s the code for a custom spin box that allows the user to enter icon sizes (e.g., “32 x 32”):
def valueFromText(self, text):
    regExp = QRegExp(tr("(\\d+)(\\s*[xx]\\s*\\d+)?"))
    if regExp.exactMatch(text):
        return regExp.cap(1).toInt()
    else:
        return 0
def textFromValue(self, value):
    return self.tr("%1 x %1").arg(value)
												
见 Icons example for the full source code.

另请参阅

QDoubleSpinBox QDateTimeEdit QSlider 自旋框范例

class QSpinBox ( [ parent=None ] ) ¶

param parent

QWidget

Constructs a spin box with 0 as minimum value and 99 as maximum value, a step value of 1. The value is initially set to 0. It is parented to parent .

另请参阅

setMinimum() setMaximum() setSingleStep()

PySide2.QtWidgets.QSpinBox. cleanText ( ) ¶

返回类型: unicode

PySide2.QtWidgets.QSpinBox. displayIntegerBase ( ) ¶

返回类型: int

另请参阅

setDisplayIntegerBase()

PySide2.QtWidgets.QSpinBox. maximum ( ) ¶

返回类型: int

另请参阅

setMaximum()

PySide2.QtWidgets.QSpinBox. minimum ( ) ¶

返回类型: int

另请参阅

setMinimum()

PySide2.QtWidgets.QSpinBox. prefix ( ) ¶

返回类型: unicode

另请参阅

setPrefix()

PySide2.QtWidgets.QSpinBox. setDisplayIntegerBase ( base ) ¶

参数: base – int

另请参阅

displayIntegerBase()

PySide2.QtWidgets.QSpinBox. setMaximum ( max ) ¶

参数: max – int

另请参阅

maximum()

PySide2.QtWidgets.QSpinBox. setMinimum ( min ) ¶

参数: min – int

另请参阅

minimum()

PySide2.QtWidgets.QSpinBox. setPrefix ( prefix ) ¶

参数: prefix – unicode

另请参阅

prefix()

PySide2.QtWidgets.QSpinBox. setRange ( min , max ) ¶

参数

min – int
max – int

Convenience function to set the minimum ，和 maximum values with a single function call.

												setRange(minimum, maximum)
												
											

相当于：

												setMinimum(minimum)
setMaximum(maximum)

另请参阅

minimum maximum

PySide2.QtWidgets.QSpinBox. setSingleStep ( val ) ¶

参数: val – int

另请参阅

singleStep()

PySide2.QtWidgets.QSpinBox. setStepType ( stepType ) ¶

参数: stepType – StepType

Sets the step type for the spin box to stepType , which is single step or adaptive decimal step.

Adaptive decimal step means that the step size will continuously be adjusted to one power of ten below the current value . So when the value is 1100, the step is set to 100, so stepping up once increases it to 1200. For 1200 stepping up takes it to 1300. For negative values, stepping down from -1100 goes to -1200.

Step direction is taken into account to handle edges cases, so that stepping down from 100 takes the value to 99 instead of 90. Thus a step up followed by a step down – or vice versa – always lands on the starting value; 99 -> 100 -> 99.

Setting this will cause the spin box to disregard the value of singleStep , although it is preserved so that singleStep comes into effect if adaptive decimal step is later turned off.

另请参阅

stepType()

PySide2.QtWidgets.QSpinBox. setSuffix ( suffix ) ¶

参数: suffix – unicode

另请参阅

suffix()

PySide2.QtWidgets.QSpinBox. setValue ( val ) ¶

参数: val – int

另请参阅

value()

PySide2.QtWidgets.QSpinBox. singleStep ( ) ¶

返回类型: int

另请参阅

setSingleStep()

PySide2.QtWidgets.QSpinBox. stepType ( ) ¶

返回类型: StepType

另请参阅

setStepType()

PySide2.QtWidgets.QSpinBox. suffix ( ) ¶

返回类型: unicode

另请参阅

setSuffix()

PySide2.QtWidgets.QSpinBox. textChanged ( arg__1 ) ¶

参数: arg__1 – unicode

PySide2.QtWidgets.QSpinBox. textFromValue ( val ) ¶

参数: val – int
返回类型: unicode

This virtual function is used by the spin box whenever it needs to display the given value . The default implementation returns a string containing value printed in the standard way using locale() .toString(), but with the thousand separator removed unless setGroupSeparatorShown() is set. Reimplementations may return anything. (See the example in the detailed description.)

注意： QSpinBox does not call this function for specialValueText() and that neither prefix() nor suffix() should be included in the return value.

If you reimplement this, you may also need to reimplement valueFromText() and validate()

另请参阅

valueFromText() validate() groupSeparator()

PySide2.QtWidgets.QSpinBox. value ( ) ¶

返回类型: int

另请参阅

setValue()

PySide2.QtWidgets.QSpinBox. valueChanged ( arg__1 ) ¶

参数: arg__1 – unicode

注意

此函数被弃用。

												def callback_unicode(value_as_unicode):
    print 'unicode value changed:', repr(value_as_unicode)
app = QApplication(sys.argv)
spinbox = QSpinBox()
spinbox.valueChanged[unicode].connect(callback_unicode)
spinbox.show()
sys.exit(app.exec_())
												
											

PySide2.QtWidgets.QSpinBox. valueChanged ( arg__1 ) ¶

参数: arg__1 – int

												def callback_int(value_as_int):
    print 'int value changed:', repr(value_as_int)
app = QApplication(sys.argv)
spinbox = QSpinBox()
spinbox.valueChanged[unicode].connect(callback_unicode)
spinbox.show()
sys.exit(app.exec_())
												
											

PySide2.QtWidgets.QSpinBox. valueFromText ( text ) ¶

参数: text – unicode
返回类型: int

This virtual function is used by the spin box whenever it needs to interpret text entered by the user as a value.

Subclasses that need to display spin box values in a non-numeric way need to reimplement this function.

注意： QSpinBox handles specialValueText() separately; this function is only concerned with the other values.

另请参阅

textFromValue() validate()

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QSpinBox ¶

概要 ¶

函数 ¶

虚函数 ¶

槽 ¶

信号 ¶

详细描述 ¶

子类化 QSpinBox ¶