QHXYModelMapper Class

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

Header: #include <QHXYModelMapper>
Instantiated By: HXYModelMapper
Inherits: QXYModelMapper

Properties

  • 1 property inherited from QObject

Public Functions

QHXYModelMapper(QObject *parent = Q_NULLPTR)
int columnCount() const
int firstColumn() const
QAbstractItemModel *model() const
QXYSeries *series() const
void setColumnCount(int columnCount)
void setFirstColumn(int firstColumn)
void setModel(QAbstractItemModel *model)
void setSeries(QXYSeries *series)
void setXRow(int xRow)
void setYRow(int yRow)
int xRow() const
int yRow() const
  • 32 public functions inherited from QObject

Signals

Additional Inherited Members

  • 1 public slot inherited from QObject
  • 11 static public members inherited from QObject
  • 6 protected functions inherited from QXYModelMapper
  • 9 protected functions inherited from QObject

Detailed Description

The QHXYModelMapper class is a horizontal 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 horizontal 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 on rows.

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 QVXYModelMapper and QXYSeries.

Property Documentation

columnCount : int

This property holds the number of columns 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 columns in the model).

Access functions:

int columnCount() const
void setColumnCount(int columnCount)

Notifier signal:

firstColumn : int

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

The minimum and default value is 0.

Access functions:

int firstColumn() const
void setFirstColumn(int firstColumn)

Notifier signal:

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()

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:

xRow : int

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

The default value is -1 (invalid mapping).

Access functions:

int xRow() const
void setXRow(int xRow)

Notifier signal:

void xRowChanged()

yRow : int

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

The default value is -1 (invalid mapping).

Access functions:

int yRow() const
void setYRow(int yRow)

Notifier signal:

void yRowChanged()

Member Function Documentation

QHXYModelMapper::QHXYModelMapper(QObject *parent = Q_NULLPTR)

Constructs a mapper object that is a child of parent.

[signal] void QHXYModelMapper::columnCountChanged()

This signal is emitted when the number of columns changes.

Note: Notifier signal for property columnCount.

[signal] void QHXYModelMapper::firstColumnChanged()

This signal is emitted when the first column changes.

Note: Notifier signal for property firstColumn.

[signal] void QHXYModelMapper::modelReplaced()

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

Note: Notifier signal for property model.

[signal] void QHXYModelMapper::seriesReplaced()

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

Note: Notifier signal for property series.

[signal] void QHXYModelMapper::xRowChanged()

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

Note: Notifier signal for property xRow.

[signal] void QHXYModelMapper::yRowChanged()

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

Note: Notifier signal for property yRow.

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