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QVXYModelMapper Class

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

Header: #include <QVXYModelMapper>
Instantiated By: VXYModelMapper
Inherits: QXYModelMapper

Properties

  • 1 property inherited from QObject

Public Functions

QVXYModelMapper(QObject *parent = nullptr)
int firstRow() const
QAbstractItemModel *model() const
int rowCount() const
QXYSeries *series() const
void setFirstRow(int firstRow)
void setModel(QAbstractItemModel *model)
void setRowCount(int rowCount)
void setSeries(QXYSeries *series)
void setXColumn(int xColumn)
void setYColumn(int yColumn)
int xColumn() const
int yColumn() const
  • 31 public functions inherited from QObject

Signals

void firstRowChanged()
void modelReplaced()
void rowCountChanged()
void seriesReplaced()
void xColumnChanged()
void yColumnChanged()

Static Public Members

const QMetaObject staticMetaObject
  • 9 static public members inherited from QObject

Additional Inherited Members

  • 1 public slot inherited from QObject
  • 9 protected functions inherited from QObject

Detailed Description

The QVXYModelMapper class is a vertical model mapper for line, spline, and scatter series.

Model mappers enable using a data model derived from the QAbstractItemModel class as a data source for a chart. A vertical model mapper is used to create a connection between a line, spline, or scatter series and the data model that holds the consecutive data point coordinates in columns.

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 QHXYModelMapper and QXYSeries.

Property Documentation

firstRow : 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 firstRow() const
void setFirstRow(int firstRow)

Notifier signal:

void firstRowChanged()

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 modelReplaced()

rowCount : 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 rowCount() const
void setRowCount(int rowCount)

Notifier signal:

void rowCountChanged()

series : QtCharts::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 seriesReplaced()

xColumn : int

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

The default value is -1 (invalid mapping).

Access functions:

int xColumn() const
void setXColumn(int xColumn)

Notifier signal:

void xColumnChanged()

yColumn : int

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

The default value is -1 (invalid mapping).

Access functions:

int yColumn() const
void setYColumn(int yColumn)

Notifier signal:

void yColumnChanged()

Member Function Documentation

QVXYModelMapper::QVXYModelMapper(QObject *parent = nullptr)

Constructs a mapper object that is a child of parent.

[signal] void QVXYModelMapper::firstRowChanged()

This signal is emitted when the first row changes.

Note: Notifier signal for property firstRow.

[signal] void QVXYModelMapper::modelReplaced()

This signal is emitted when the model that the mapper is connected to changes.

Note: Notifier signal for property model.

[signal] void QVXYModelMapper::rowCountChanged()

This signal is emitted when the number of rows changes.

Note: Notifier signal for property rowCount.

[signal] void QVXYModelMapper::seriesReplaced()

This signal is emitted when the series that the mapper is connected to changes.

Note: Notifier signal for property series.

[signal] void QVXYModelMapper::xColumnChanged()

This signal is emitted when the column that contains the x-coordinates of data points changes.

Note: Notifier signal for property xColumn.

[signal] void QVXYModelMapper::yColumnChanged()

This signal is emitted when the column that contains the y-coordinates of data points changes.

Note: Notifier signal for property yColumn.

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