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/Qt 5.13

QVBoxPlotModelMapper Class

The QVBoxPlotModelMapper is a vertical model mapper for box plot series. More...

Header: #include <QVBoxPlotModelMapper>
Instantiated By: VBoxPlotModelMapper
Inherits: QObject

Properties

Public Functions

QVBoxPlotModelMapper(QObject *parent = nullptr)
int firstBoxSetColumn() const
int firstRow() const
int lastBoxSetColumn() const
QAbstractItemModel * model() const
int rowCount() const
QBoxPlotSeries * series() const
void setFirstBoxSetColumn(int firstBoxSetColumn)
void setFirstRow(int firstRow)
void setLastBoxSetColumn(int lastBoxSetColumn)
void setModel(QAbstractItemModel *model)
void setRowCount(int rowCount)
void setSeries(QBoxPlotSeries *series)

Signals

void firstBoxSetColumnChanged()
void firstRowChanged()
void lastBoxSetColumnChanged()
void modelReplaced()
void rowCountChanged()
void seriesReplaced()

Detailed Description

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 data model and a QBoxPlotSeries object, so that each column in the data model defines a box-and-whiskers item and each row maps to the range and three median values of the box-and-whiskers item.

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

The model mapper ensures that all the bar box-and-whiskers items in the box plot series have equal sizes. Therefore, adding or removing a value from a box-and-whiskers item causes the same change to be made in all the box-and-whiskers items in the box plot series.

See also QHBoxPlotModelMapper.

Property Documentation

firstBoxSetColumn : int

This property holds the column of the model that is used as the data source for the first box-and-whiskers item.

The default value is -1 (invalid mapping).

Access functions:

int firstBoxSetColumn() const
void setFirstBoxSetColumn(int firstBoxSetColumn)

Notifier signal:

void firstBoxSetColumnChanged()

firstRow : int

This property holds the row of the model that contains the first values of the box-and-whiskers items in the box plot series.

The minimum and default value is 0.

Access functions:

int firstRow() const
void setFirstRow(int firstRow)

Notifier signal:

void firstRowChanged()

lastBoxSetColumn : int

This property holds the column of the model that is used as the data source for the last box-and-whiskers item.

The default value is -1 (invalid mapping).

Access functions:

int lastBoxSetColumn() const
void setLastBoxSetColumn(int lastBoxSetColumn)

Notifier signal:

void lastBoxSetColumnChanged()

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 the box plot series.

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

Access functions:

int rowCount() const
void setRowCount(int rowCount)

Notifier signal:

void rowCountChanged()

series : QtCharts::QBoxPlotSeries*

This property holds the box plot 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:

QBoxPlotSeries * series() const
void setSeries(QBoxPlotSeries *series)

Notifier signal:

void seriesReplaced()

Member Function Documentation

QVBoxPlotModelMapper::QVBoxPlotModelMapper(QObject *parent = nullptr)

Constructs a mapper object that is a child of parent.

[signal] void QVBoxPlotModelMapper::firstBoxSetColumnChanged()

This signal is emitted when the first box-and-whiskers item column changes.

Note: Notifier signal for property firstBoxSetColumn.

[signal] void QVBoxPlotModelMapper::firstRowChanged()

This signal is emitted when the first row changes.

Note: Notifier signal for property firstRow.

[signal] void QVBoxPlotModelMapper::lastBoxSetColumnChanged()

This signal is emitted when the last box-and-whiskers item column changes.

Note: Notifier signal for property lastBoxSetColumn.

[signal] void QVBoxPlotModelMapper::modelReplaced()

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

Note: Notifier signal for property model.

[signal] void QVBoxPlotModelMapper::rowCountChanged()

This signal is emitted when the number of rows changes.

Note: Notifier signal for property rowCount.

[signal] void QVBoxPlotModelMapper::seriesReplaced()

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

Note: Notifier signal for property series.

© The Qt Company Ltd
Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-5.13/qvboxplotmodelmapper.html