QDoubleSpinBox¶
The
QDoubleSpinBox
class provides a spin box widget that takes doubles. More…
Synopsis¶
Functions¶
def
cleanText
()def
decimals
()def
maximum
()def
minimum
()def
prefix
()def
setDecimals
(prec)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
()
Virtual functions¶
def
textFromValue
(val)def
valueFromText
(text)
Slots¶
def
setValue
(val)
Signals¶
def
textChanged
(arg__1)def
valueChanged
(arg__1)def
valueChanged
(arg__1)
Detailed Description¶
QDoubleSpinBox
allows the user to choose a value by clicking the up and down buttons or by pressing Up or Down on the keyboard to increase or decrease the value currently displayed. The user can also type the value in manually. The spin box supports double values but can be extended to use different strings withvalidate()
,textFromValue()
andvalueFromText()
.Every time the value changes
QDoubleSpinBox
emitsvalueChanged()
andtextChanged()
signals, the former providing a double and the latter aQString
. ThetextChanged()
signal provides the value with bothprefix()
andsuffix()
. The current value can be fetched withvalue()
and set withsetValue()
.Note:
QDoubleSpinBox
will round numbers so they can be displayed with the current precision. In aQDoubleSpinBox
with decimals set to 2, callingsetValue
(2.555) will causevalue()
to return 2.56.Clicking the up and 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 behavior you can reimplement the virtual functionstepBy()
. The minimum and maximum value and the step size can be set using one of the constructors, and can be changed later withsetMinimum()
,setMaximum()
andsetSingleStep()
. The spinbox has a default precision of 2 decimal places but this can be changed usingsetDecimals()
.Most spin boxes are directional, but
QDoubleSpinBox
can also operate as a circular spin box, i.e. if the range is 0.0-99.9 and the current value is 99.9, clicking “up” will give 0 ifwrapping()
is set to true. UsesetWrapping()
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()
andsetSuffix()
. The text in the spin box is retrieved withtext()
(which includes anyprefix()
andsuffix()
), or withcleanText()
(which has noprefix()
, nosuffix()
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 withQDoubleSpinBox
.Note
The displayed value of the
QDoubleSpinBox
is limited to 18 characters in addition to eventual prefix and suffix content. This limitation is used to keep the double spin box usable even with extremely large values.See also
- class PySide2.QtWidgets.QDoubleSpinBox([parent=None])¶
- param parent:
Constructs a spin box with 0.0 as minimum value and 99.99 as maximum value, a step value of 1.0 and a precision of 2 decimal places. The value is initially set to 0.00. The spin box has the given
parent
.See also
- PySide2.QtWidgets.QDoubleSpinBox.cleanText()¶
- Return type:
str
This property holds the text of the spin box excluding any prefix, suffix, or leading or trailing whitespace..
- PySide2.QtWidgets.QDoubleSpinBox.decimals()¶
- Return type:
int
This property holds the precision of the spin box, in decimals.
Sets how many decimals the spinbox will use for displaying and interpreting doubles.
Warning
The maximum value for
decimals
is DBL_MAX_10_EXP + DBL_DIG (ie. 323) because of the limitations of the double type.Note: The maximum, minimum and value might change as a result of changing this property.
- PySide2.QtWidgets.QDoubleSpinBox.maximum()¶
- Return type:
double
This property holds the maximum value of the spin box.
When setting this property the
minimum
is adjusted if necessary, to ensure that the range remains valid.The default maximum value is 99.99.
Note: The maximum value will be rounded to match the decimals property.
See also
- PySide2.QtWidgets.QDoubleSpinBox.minimum()¶
- Return type:
double
This property holds the minimum value of the spin box.
When setting this property the
maximum
is adjusted if necessary to ensure that the range remains valid.The default minimum value is 0.0.
Note: The minimum value will be rounded to match the decimals property.
See also
- PySide2.QtWidgets.QDoubleSpinBox.prefix()¶
- Return type:
str
This property holds the spin box’s prefix.
The prefix is prepended to the start of the displayed value. Typical use is to display a unit of measurement or a currency symbol. For example:
spinbox.setPrefix("$")
To turn off the prefix display, set this property to an empty string. The default is no prefix. The prefix is not displayed when
value()
==minimum()
andspecialValueText()
is set.If no prefix is set, returns an empty string.
- PySide2.QtWidgets.QDoubleSpinBox.setDecimals(prec)¶
- Parameters:
prec – int
This property holds the precision of the spin box, in decimals.
Sets how many decimals the spinbox will use for displaying and interpreting doubles.
Warning
The maximum value for
decimals
is DBL_MAX_10_EXP + DBL_DIG (ie. 323) because of the limitations of the double type.Note: The maximum, minimum and value might change as a result of changing this property.
- PySide2.QtWidgets.QDoubleSpinBox.setMaximum(max)¶
- Parameters:
max –
double
This property holds the maximum value of the spin box.
When setting this property the
minimum
is adjusted if necessary, to ensure that the range remains valid.The default maximum value is 99.99.
Note: The maximum value will be rounded to match the decimals property.
See also
- PySide2.QtWidgets.QDoubleSpinBox.setMinimum(min)¶
- Parameters:
min –
double
This property holds the minimum value of the spin box.
When setting this property the
maximum
is adjusted if necessary to ensure that the range remains valid.The default minimum value is 0.0.
Note: The minimum value will be rounded to match the decimals property.
See also
- PySide2.QtWidgets.QDoubleSpinBox.setPrefix(prefix)¶
- Parameters:
prefix – str
This property holds the spin box’s prefix.
The prefix is prepended to the start of the displayed value. Typical use is to display a unit of measurement or a currency symbol. For example:
spinbox.setPrefix("$")
To turn off the prefix display, set this property to an empty string. The default is no prefix. The prefix is not displayed when
value()
==minimum()
andspecialValueText()
is set.If no prefix is set, returns an empty string.
- PySide2.QtWidgets.QDoubleSpinBox.setRange(min, max)¶
- Parameters:
min –
double
max –
double
Convenience function to set the
minimum
andmaximum
values with a single function call.Note: The maximum and minimum values will be rounded to match the decimals property.
setRange(minimum, maximum)
is equivalent to:
setMinimum(minimum) setMaximum(maximum)
- PySide2.QtWidgets.QDoubleSpinBox.setSingleStep(val)¶
- Parameters:
val –
double
This property holds the step value.
When the user uses the arrows to change the spin box’s value the value will be incremented/decremented by the amount of the . The default value is 1.0. Setting a value of less than 0 does nothing.
- PySide2.QtWidgets.QDoubleSpinBox.setStepType(stepType)¶
- Parameters:
stepType –
StepType
This property holds The step type..
The step type can be single step or adaptive decimal step.
- PySide2.QtWidgets.QDoubleSpinBox.setSuffix(suffix)¶
- Parameters:
suffix – str
This property holds the suffix of the spin box.
The suffix is appended to the end of the displayed value. Typical use is to display a unit of measurement or a currency symbol. For example:
spinbox.setSuffix(" km")
To turn off the suffix display, set this property to an empty string. The default is no suffix. The suffix is not displayed for the
minimum()
ifspecialValueText()
is set.If no suffix is set, returns an empty string.
- PySide2.QtWidgets.QDoubleSpinBox.setValue(val)¶
- Parameters:
val –
double
This property holds the value of the spin box.
will emit
valueChanged()
if the new value is different from the old one. The value property has a second notifier signal which includes the spin box’s prefix and suffix.Note: The value will be rounded so it can be displayed with the current setting of decimals.
See also
- PySide2.QtWidgets.QDoubleSpinBox.singleStep()¶
- Return type:
double
This property holds the step value.
When the user uses the arrows to change the spin box’s value the value will be incremented/decremented by the amount of the . The default value is 1.0. Setting a value of less than 0 does nothing.
- PySide2.QtWidgets.QDoubleSpinBox.stepType()¶
- Return type:
This property holds The step type..
The step type can be single step or adaptive decimal step.
- PySide2.QtWidgets.QDoubleSpinBox.suffix()¶
- Return type:
str
This property holds the suffix of the spin box.
The suffix is appended to the end of the displayed value. Typical use is to display a unit of measurement or a currency symbol. For example:
spinbox.setSuffix(" km")
To turn off the suffix display, set this property to an empty string. The default is no suffix. The suffix is not displayed for the
minimum()
ifspecialValueText()
is set.If no suffix is set, returns an empty string.
- PySide2.QtWidgets.QDoubleSpinBox.textChanged(arg__1)¶
- Parameters:
arg__1 – str
- PySide2.QtWidgets.QDoubleSpinBox.textFromValue(val)¶
- Parameters:
val –
double
- Return type:
str
This virtual function is used by the spin box whenever it needs to display the given
value
. The default implementation returns a string containingvalue
printed usinglocale()
.toString(value
,QLatin1Char
(‘f’),decimals()
) and will remove the thousand separator unlesssetGroupSeparatorShown()
is set. Reimplementations may return anything.Note:
QDoubleSpinBox
does not call this function forspecialValueText()
and that neitherprefix()
norsuffix()
should be included in the return value.If you reimplement this, you may also need to reimplement
valueFromText()
.See also
valueFromText()
groupSeparator()
- PySide2.QtWidgets.QDoubleSpinBox.value()¶
- Return type:
double
This property holds the value of the spin box.
will emit
valueChanged()
if the new value is different from the old one. The value property has a second notifier signal which includes the spin box’s prefix and suffix.Note: The value will be rounded so it can be displayed with the current setting of decimals.
See also
- PySide2.QtWidgets.QDoubleSpinBox.valueChanged(arg__1)¶
- Parameters:
arg__1 – str
Note
This function is deprecated.
- PySide2.QtWidgets.QDoubleSpinBox.valueChanged(arg__1)
- Parameters:
arg__1 –
double
- PySide2.QtWidgets.QDoubleSpinBox.valueFromText(text)¶
- Parameters:
text – str
- Return type:
double
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.
Note:
QDoubleSpinBox
handlesspecialValueText()
separately; this function is only concerned with the other values.See also
textFromValue()
validate()
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