QXYModelMapper Class

The QXYModelMapper class is a model mapper for line, spline, and scatter series. More...

Header: #include <QXYModelMapper>
CMake: find_package(Qt6 REQUIRED COMPONENTS Graphs)
target_link_libraries(mytarget PRIVATE Qt6::Graphs)
qmake: QT += graphs
In QML: XYModelMapper
Inherits: QObject

Properties

Public Functions

int count() const
int first() const
QAbstractItemModel *model() const
Qt::Orientation orientation() const
QXYSeries *series() const
void setCount(int count)
void setFirst(int first)
void setModel(QAbstractItemModel *model)
void setOrientation(Qt::Orientation orientation)
void setSeries(QXYSeries *series)
void setXSection(int xSection)
void setYSection(int ySection)
int xSection() const
int ySection() const

Signals

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 line, spline, or scatter series. A TableModel is a natural choice for the model.

Both model and series properties can be used to manipulate the data. The model mapper keeps the series and the data model in sync.

See also QXYSeries.

Property Documentation

count : int

This property holds the number of rows of the model that are mapped as the data for series.

The minimum and default value is -1 (the number is limited by the number of rows in the model).

Access functions:

int count() const
void setCount(int count)

Notifier signal:

void countChanged()

See also QXYModelMapper::orientation.

first : int

This property holds the row of the model that contains the data for the first point of the series.

The minimum and default value is 0.

Access functions:

int first() const
void setFirst(int first)

Notifier signal:

void firstChanged()

See also QXYModelMapper::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 columns defines a bar set, and the model's rows define the categories. When the orientation is set to Qt::Horizontal, each of the model's rows defines a bar set, and the model's columns define categories.

The default value is Qt::Vertical

Access functions:

Qt::Orientation orientation() const
void setOrientation(Qt::Orientation orientation)

Notifier signal:

void orientationChanged()

series : QXYSeries*

This property holds the 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:

QXYSeries *series() const
void setSeries(QXYSeries *series)

Notifier signal:

void seriesChanged()

xSection : int

This property holds the section of the model that contains the x-coordinates of data points.

The default value is -1 (invalid mapping).

Access functions:

int xSection() const
void setXSection(int xSection)

Notifier signal:

void xSectionChanged()

See also QXYModelMapper::orientation.

ySection : int

This property holds the section of the model that contains the y-coordinates of data points.

The default value is -1 (invalid mapping).

Access functions:

int ySection() const
void setYSection(int ySection)

Notifier signal:

void ySectionChanged()

See also QXYModelMapper::orientation.

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