class QHXYModelMapper

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

Synopsis

Properties

• columnCountᅟ - Number of columns of the model that are mapped as the data for series

• firstColumnᅟ - Column of the model that contains the data for the first point of the series

• modelᅟ - That is used by the mapper

• xRowᅟ - Row of the model that contains the x-coordinates of the data points

• yRowᅟ - Row of the model that contains the y-coordinates of the data points

Methods

• def __init__()

• def columnCount()

• def firstColumn()

• def setColumnCount()

• def setFirstColumn()

• def setXRow()

• def setYRow()

• def xRow()

• def yRow()

Signals

• def columnCountChanged()

• def firstColumnChanged()

• def modelReplaced()

• def seriesReplaced()

• def xRowChanged()

• def yRowChanged()

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 horizontal model mapper is used to create a connection between a line, spline, or scatter series and the data model that has X and Y rows for the coordinates and holds the data points for the XYSeries as columns. 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

QVXYModelMapper 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 columnCountᅟ: 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:

• columnCount()

• setColumnCount()

• Signal columnCountChanged()

property firstColumnᅟ: 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:

• firstColumn()

• setFirstColumn()

• Signal firstColumnChanged()

property modelᅟ: QAbstractItemModel

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

Access functions:

• Signal modelReplaced()

property xRowᅟ: 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:

• xRow()

• setXRow()

• Signal xRowChanged()

property yRowᅟ: 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:

• yRow()

• setYRow()

• Signal yRowChanged()

__init__([parent=None])

Parameters:

parent – QObject

Constructs a mapper object that is a child of parent.

columnCount()

Return type:

int

See also

setColumnCount()

Getter of property columnCountᅟ .

columnCountChanged()

This signal is emitted when the number of columns changes.

Notification signal of property columnCountᅟ .

firstColumn()

Return type:

int

See also

setFirstColumn()

Getter of property firstColumnᅟ .

firstColumnChanged()

This signal is emitted when the first column changes.

Notification signal of property firstColumnᅟ .

modelReplaced()

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

Notification signal of property modelᅟ .

seriesReplaced()

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

setColumnCount(columnCount)

Parameters:

columnCount – int

See also

columnCount()

Setter of property columnCountᅟ .

setFirstColumn(firstColumn)

Parameters:

firstColumn – int

See also

firstColumn()

Setter of property firstColumnᅟ .

setXRow(xRow)

Parameters:

xRow – int

See also

xRow()

Setter of property xRowᅟ .

setYRow(yRow)

Parameters:

yRow – int

See also

yRow()

Setter of property yRowᅟ .

xRow()

Return type:

int

See also

setXRow()

Getter of property xRowᅟ .

xRowChanged()

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

Notification signal of property xRowᅟ .

yRow()

Return type:

int

See also

setYRow()

Getter of property yRowᅟ .

yRowChanged()

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

Notification signal of property yRowᅟ .