QCategoryAxis#
The QCategoryAxis
class places named ranges on the axis. More…
Synopsis#
Properties#
categoriesLabels
- Category labels as a string listcount
- Number of categorieslabelsPosition
- Position of the category labels. The labels in the beginning and in the end of the axes may overlap other axes’ labels when positioned on valuestartValue
- Low end of the first category on the axis
Functions#
def
append
(label, categoryEndValue)def
categoriesLabels
()def
count
()def
endValue
(categoryLabel)def
labelsPosition
()def
remove
(label)def
replaceLabel
(oldLabel, newLabel)def
setLabelsPosition
(position)def
setStartValue
(min)def
startValue
([categoryLabel=””])
Signals#
def
categoriesChanged
()def
labelsPositionChanged
(position)
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#
This class can be used to explain the underlying data by adding labeled categories. Unlike QBarCategoryAxis
, QCategoryAxis
allows the widths of the category ranges to be specified freely.
Example code on how to use QCategoryAxis
:
QChartView *chartView = new QChartView; QLineSeries *series = new QLineSeries; // ... chartView->chart()->addSeries(series); QCategoryAxis *axisY = new QCategoryAxis; axisY->setMin(0); axisY->setMax(52); axisY->setStartValue(15); axisY->append("First", 20); axisY->append("Second", 37); axisY->append("Third", 52); chartView->chart()->setAxisY(axisY, series);
- class PySide6.QtCharts.QCategoryAxis([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.QCategoryAxis.categoriesLabels: list of strings#
This property holds The category labels as a string list..
- Access functions:
- property PᅟySide6.QtCharts.QCategoryAxis.count: int#
This property holds The number of categories..
- Access functions:
count
()
- property PᅟySide6.QtCharts.QCategoryAxis.labelsPosition: AxisLabelsPosition#
This property holds The position of the category labels. The labels in the beginning and in the end of the axes may overlap other axes’ labels when positioned on value..
- Access functions:
setLabelsPosition
(position)Signal
labelsPositionChanged
(position)
- property PᅟySide6.QtCharts.QCategoryAxis.startValue: float#
This property holds The low end of the first category on the axis..
- Access functions:
startValue
([categoryLabel=””])setStartValue
(min)
- PySide6.QtCharts.QCategoryAxis.AxisLabelsPosition#
This enum describes the position of the category labels.
Constant
Description
QCategoryAxis.AxisLabelsPositionCenter
Labels are centered to category.
QCategoryAxis.AxisLabelsPositionOnValue
Labels are positioned to the high end limit of the category.
- PySide6.QtCharts.QCategoryAxis.append(label, categoryEndValue)#
- Parameters:
label – str
categoryEndValue – float
Appends a new category to the axis with the label categoryLabel
. A category label has to be unique. categoryEndValue
specifies the high end limit of the category. It has to be greater than the high end limit of the previous category. Otherwise the method returns without adding a new category.
- PySide6.QtCharts.QCategoryAxis.categoriesChanged()#
This signal is emitted when the categories of the axis change.
- PySide6.QtCharts.QCategoryAxis.categoriesLabels()#
- Return type:
list of strings
Returns the list of the categories’ labels.
Getter of property categoriesLabels
.
- PySide6.QtCharts.QCategoryAxis.count()#
- Return type:
int
Returns the number of categories.
Getter of property count
.
- PySide6.QtCharts.QCategoryAxis.endValue(categoryLabel)#
- Parameters:
categoryLabel – str
- Return type:
float
Returns the high end limit of the category specified by categoryLabel
.
- PySide6.QtCharts.QCategoryAxis.labelsPosition()#
- Return type:
See also
Getter of property labelsPosition
.
- PySide6.QtCharts.QCategoryAxis.labelsPositionChanged(position)#
- Parameters:
position –
AxisLabelsPosition
Notification signal of property labelsPosition
.
- PySide6.QtCharts.QCategoryAxis.remove(label)#
- Parameters:
label – str
Removes a category specified by the label categoryLabel
from the axis.
- PySide6.QtCharts.QCategoryAxis.replaceLabel(oldLabel, newLabel)#
- Parameters:
oldLabel – str
newLabel – str
Replaces an existing category label specified by oldLabel
with newLabel
. If the old label does not exist, the method returns without making any changes.
- PySide6.QtCharts.QCategoryAxis.setLabelsPosition(position)#
- Parameters:
position –
AxisLabelsPosition
See also
Setter of property labelsPosition
.
- PySide6.QtCharts.QCategoryAxis.setStartValue(min)#
- Parameters:
min – float
Sets min
to be the low end limit of the first category on the axis. If categories have already been added to the axis, the passed value must be less than the high end value of the already defined first category range. Otherwise nothing is done.
See also
Setter of property startValue
.
- PySide6.QtCharts.QCategoryAxis.startValue([categoryLabel=""])#
- Parameters:
categoryLabel – str
- Return type:
float
Returns the low end limit of the category specified by categoryLabel
.
See also