class QVXYModelMapper

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

Synopsis

Properties

• firstRowᅟ - Row of the model that contains the data for the first point of the series

• modelᅟ - That is used by the mapper

• rowCountᅟ - Number of rows of the model that are mapped as the data for series

• xColumnᅟ - Column of the model that contains the x-coordinates of data points

• yColumnᅟ - Column of the model that contains the y-coordinates of data points

Methods

• def __init__()

• def firstRow()

• def rowCount()

• def setFirstRow()

• def setRowCount()

• def setXColumn()

• def setYColumn()

• def xColumn()

• def yColumn()

Signals

• def firstRowChanged()

• def modelReplaced()

• def rowCountChanged()

• def seriesReplaced()

• def xColumnChanged()

• def yColumnChanged()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

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 line, spline, or scatter series and the data model that has X and Y columns for the coordinates and holds the data points for the XYSeries as rows. 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

QHXYModelMapper QXYSeries Charts with Widgets Gallery

Note

Properties can be used directly when from __feature__ import true_property is used or via accessor functions otherwise.

property firstRowᅟ: 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:

• firstRow()

• setFirstRow()

• Signal firstRowChanged()

property modelᅟ: QAbstractItemModel

This property holds The model that is used by the mapper..

Access functions:

• Signal modelReplaced()

property rowCountᅟ: 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:

• rowCount()

• setRowCount()

• Signal rowCountChanged()

property xColumnᅟ: 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:

• xColumn()

• setXColumn()

• Signal xColumnChanged()

property yColumnᅟ: 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:

• yColumn()

• setYColumn()

• Signal yColumnChanged()

__init__([parent=None])

Parameters:

parent – QObject

Constructs a mapper object that is a child of parent.

firstRow()

Return type:

int

See also

setFirstRow()

Getter of property firstRowᅟ .

firstRowChanged()

This signal is emitted when the first row changes.

Notification signal of property firstRowᅟ .

modelReplaced()

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

Notification signal of property modelᅟ .

rowCount()

Return type:

int

See also

setRowCount()

Getter of property rowCountᅟ .

rowCountChanged()

This signal is emitted when the number of rows changes.

Notification signal of property rowCountᅟ .

seriesReplaced()

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

setFirstRow(firstRow)

Parameters:

firstRow – int

See also

firstRow()

Setter of property firstRowᅟ .

setRowCount(rowCount)

Parameters:

rowCount – int

See also

rowCount()

Setter of property rowCountᅟ .

setXColumn(xColumn)

Parameters:

xColumn – int

See also

xColumn()

Setter of property xColumnᅟ .

setYColumn(yColumn)

Parameters:

yColumn – int

See also

yColumn()

Setter of property yColumnᅟ .

xColumn()

Return type:

int

See also

setXColumn()

Getter of property xColumnᅟ .

xColumnChanged()

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

Notification signal of property xColumnᅟ .

yColumn()

Return type:

int

See also

setYColumn()

Getter of property yColumnᅟ .

yColumnChanged()

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

Notification signal of property yColumnᅟ .