QLogValueAxis#
The QLogValueAxis
class adds a logarithmic scale to a chart’s axis. More…
Synopsis#
Properties#
base
- Of the logarithmlabelFormat
- Label format of the axismax
- Maximum value on the axismin
- Minimum value on the axisminorTickCount
- Number of minor tick marks on the axis. This indicates how many grid lines are drawn between major ticks on the chart. Labels are not drawn for minor ticks. The default value is 0. Set the value to -1 and the number of grid lines between major ticks will be calculated automaticallytickCount
- Number of tick marks on the axis. This indicates how many grid lines are drawn on the chart. This value is read-only
Functions#
def
base
()def
labelFormat
()def
max
()def
min
()def
minorTickCount
()def
setBase
(base)def
setLabelFormat
(format)def
setMax
(max)def
setMin
(min)def
setMinorTickCount
(minorTickCount)def
setRange
(min, max)def
tickCount
()
Signals#
def
baseChanged
(base)def
labelFormatChanged
(format)def
maxChanged
(max)def
minChanged
(min)def
minorTickCountChanged
(minorTickCount)def
rangeChanged
(min, max)def
tickCountChanged
(tickCount)
Note
This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE
Detailed Description#
A logarithmic scale is a nonlinear scale that is based on orders of magnitude, so that each tick mark on the axis is the previous tick mark multiplied by a value.
Note
If QLogValueAxis
is attached to a series with one or more points with negative or zero values on the associated dimension, the series will not be plotted at all. This is particularly relevant when XYModelMappers are used, since empty cells in models typically contain zero values.
- class PySide6.QtCharts.QLogValueAxis([parent=None])#
- Parameters:
parent –
PySide6.QtCore.QObject
Constructs an axis object that is a child of parent
.
Note
Properties can be used directly when from __feature__ import true_property
is used or via accessor functions otherwise.
- property PᅟySide6.QtCharts.QLogValueAxis.base: float#
This property holds The base of the logarithm..
The value has to be greater than 0 and cannot equal 1.
- Access functions:
base
()setBase
(base)Signal
baseChanged
(base)
- property PᅟySide6.QtCharts.QLogValueAxis.labelFormat: str#
This property holds The label format of the axis..
The format string supports the following conversion specifiers, length modifiers, and flags provided by printf()
in the standard C++ library: d, i, o, x, X, f, F, e, E, g, G, c.
If localizeNumbers
is true
, the supported specifiers are limited to: d, e, E, f, g, G, and i. Also, only the precision modifier is supported. The rest of the formatting comes from the default QLocale of the application.
See also
asprintf()
- Access functions:
labelFormat
()setLabelFormat
(format)Signal
labelFormatChanged
(format)
- property PᅟySide6.QtCharts.QLogValueAxis.max: float#
This property holds The maximum value on the axis..
When setting this property, the minimum value is adjusted if necessary, to ensure that the range remains valid. The value has to be greater than 0.
- Access functions:
max
()setMax
(max)Signal
maxChanged
(max)
- property PᅟySide6.QtCharts.QLogValueAxis.min: float#
This property holds The minimum value on the axis..
When setting this property, the maximum value is adjusted if necessary, to ensure that the range remains valid. The value has to be greater than 0.
- Access functions:
min
()setMin
(min)Signal
minChanged
(min)
- property PᅟySide6.QtCharts.QLogValueAxis.minorTickCount: int#
This property holds The number of minor tick marks on the axis. This indicates how many grid lines are drawn between major ticks on the chart. Labels are not drawn for minor ticks. The default value is 0. Set the value to -1 and the number of grid lines between major ticks will be calculated automatically..
- Access functions:
setMinorTickCount
(minorTickCount)Signal
minorTickCountChanged
(minorTickCount)
- property PᅟySide6.QtCharts.QLogValueAxis.tickCount: int#
This property holds The number of tick marks on the axis. This indicates how many grid lines are drawn on the chart. This value is read-only..
- Access functions:
tickCount
()Signal
tickCountChanged
(tickCount)
Getter of property base
.
- PySide6.QtCharts.QLogValueAxis.baseChanged(base)#
- Parameters:
base – float
This signal is emitted when the base
of the logarithm of the axis changes.
Notification signal of property base
.
- PySide6.QtCharts.QLogValueAxis.labelFormat()#
- Return type:
str
See also
Getter of property labelFormat
.
- PySide6.QtCharts.QLogValueAxis.labelFormatChanged(format)#
- Parameters:
format – str
This signal is emitted when the format
of axis labels changes.
Notification signal of property labelFormat
.
Getter of property max
.
- PySide6.QtCharts.QLogValueAxis.maxChanged(max)#
- Parameters:
max – float
This signal is emitted when the maximum value of the axis, specified by max
, changes.
Notification signal of property max
.
Getter of property min
.
- PySide6.QtCharts.QLogValueAxis.minChanged(min)#
- Parameters:
min – float
This signal is emitted when the minimum value of the axis, specified by min
, changes.
Notification signal of property min
.
- PySide6.QtCharts.QLogValueAxis.minorTickCount()#
- Return type:
int
See also
Getter of property minorTickCount
.
- PySide6.QtCharts.QLogValueAxis.minorTickCountChanged(minorTickCount)#
- Parameters:
minorTickCount – int
This signal is emitted when the number of minor tick marks on the axis, specified by minorTickCount
, changes.
Notification signal of property minorTickCount
.
- PySide6.QtCharts.QLogValueAxis.rangeChanged(min, max)#
- Parameters:
min – float
max – float
This signal is emitted when the minimum or maximum value of the axis, specified by min
and max
, changes.
Setter of property base
.
- PySide6.QtCharts.QLogValueAxis.setLabelFormat(format)#
- Parameters:
format – str
See also
Setter of property labelFormat
.
Setter of property max
.
Setter of property min
.
- PySide6.QtCharts.QLogValueAxis.setMinorTickCount(minorTickCount)#
- Parameters:
minorTickCount – int
See also
Setter of property minorTickCount
.
- PySide6.QtCharts.QLogValueAxis.setRange(min, max)#
- Parameters:
min – float
max – float
Sets the range from min
to max
on the axis. If min
is greater than max
, this function returns without making any changes.
- PySide6.QtCharts.QLogValueAxis.tickCount()#
- Return type:
int
Getter of property tickCount
.
- PySide6.QtCharts.QLogValueAxis.tickCountChanged(tickCount)#
- Parameters:
tickCount – int
This signal is emitted when the number of tick marks on the axis, specified by tickCount
, changes.
Notification signal of property tickCount
.