QPieModelMapper Class
The QPieModelMapper is a model mapper for pie series. More...
| Header: | #include <QPieModelMapper> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS Graphs)target_link_libraries(mytarget PRIVATE Qt6::Graphs) |
| qmake: | QT += graphs |
| In QML: | PieModelMapper |
| Inherits: | QObject |
- List of all members, including inherited members
- QPieModelMapper is part of Qt Graphs C++ Classes for 2D.
Properties
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Public Functions
| qsizetype | count() const |
| qsizetype | first() const |
| qsizetype | labelsSection() const |
| QAbstractItemModel * | model() const |
| Qt::Orientation | orientation() const |
| QPieSeries * | series() const |
| void | setCount(qsizetype count) |
| void | setFirst(qsizetype first) |
| void | setLabelsSection(qsizetype labelsSection) |
| void | setModel(QAbstractItemModel *model) |
| void | setOrientation(Qt::Orientation orientation) |
| void | setSeries(QPieSeries *series) |
| void | setValuesSection(qsizetype valuesSection) |
| qsizetype | valuesSection() const |
Signals
| void | countChanged() |
| void | firstChanged() |
| void | labelsSectionChanged() |
| void | modelChanged() |
| void | orientationChanged() |
| void | seriesChanged() |
| void | valuesSectionChanged() |
Detailed Description
Model mappers enable using a data model derived from the QAbstractItemModel class as a data source for a graph. A model mapper is used to create a connection between a data model and QPieSeries.
Both model and pie series properties can be used to manipulate the data. The model mapper keeps the pie series and the data model in sync.
Property Documentation
count : qsizetype
This property holds the number of columns or rows of the model that are mapped as the data for a pie series.
The minimum and default value is -1 (number limited by the number of rows in the model).
Access functions:
| qsizetype | count() const |
| void | setCount(qsizetype count) |
Notifier signal:
| void | countChanged() |
See also QPieModelMapper::orientation.
first : qsizetype
This property holds the column or row of the model that contains the first slice value.
The minimum and default value is 0.
Access functions:
| qsizetype | first() const |
| void | setFirst(qsizetype first) |
Notifier signal:
| void | firstChanged() |
See also QPieModelMapper::orientation.
labelsSection : qsizetype
This property holds the column or row of the model that is kept in sync with the labels of the pie's slices.
The default value is -1 (invalid mapping).
Access functions:
| qsizetype | labelsSection() const |
| void | setLabelsSection(qsizetype labelsSection) |
Notifier signal:
| void | labelsSectionChanged() |
See also QPieModelMapper::orientation.
model : QAbstractItemModel*
This property holds the model that is used by the mapper.
Access functions:
| QAbstractItemModel * | model() const |
| void | setModel(QAbstractItemModel *model) |
Notifier signal:
| void | modelChanged() |
orientation : Qt::Orientation
Tells the modelmapper how to map data from a model. If Qt::Vertical is used, each of the model's rows defines a pie slice, and the model's columns define the label or the value of the pie slice. When the orientation is set to Qt::Horizontal, each of the model's columns defines a pie slice, and the model's rows define the label or the value of the pie slice.
The default value is Qt::Vertical
Access functions:
| Qt::Orientation | orientation() const |
| void | setOrientation(Qt::Orientation orientation) |
Notifier signal:
| void | orientationChanged() |
series : QPieSeries*
This property holds the pie series that is used by the mapper.
All the data in the series is discarded when it is set to the mapper. When a new series is specified, the old series is disconnected (but it preserves its data).
Access functions:
| QPieSeries * | series() const |
| void | setSeries(QPieSeries *series) |
Notifier signal:
| void | seriesChanged() |
valuesSection : qsizetype
This property holds the column or row of the model that is kept in sync with the values of the pie's slices.
The default value is -1 (invalid mapping).
Access functions:
| qsizetype | valuesSection() const |
| void | setValuesSection(qsizetype valuesSection) |
Notifier signal:
| void | valuesSectionChanged() |
See also QPieModelMapper::orientation.