QHCandlestickModelMapper Class
The QHCandlestickModelMapper class is a horizontal model mapper for a candlestick series. More...
| Header: | #include <QHCandlestickModelMapper> |
| Since: | Qt 5.8 |
| Instantiated By: | HCandlestickModelMapper |
| Inherits: | QCandlestickModelMapper |
This class was introduced in Qt 5.8.
Properties
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Public Functions
| QHCandlestickModelMapper(QObject *parent = nullptr) | |
| int | closeColumn() const |
| int | firstSetRow() const |
| int | highColumn() const |
| int | lastSetRow() const |
| int | lowColumn() const |
| int | openColumn() const |
| void | setCloseColumn(int closeColumn) |
| void | setFirstSetRow(int firstSetRow) |
| void | setHighColumn(int highColumn) |
| void | setLastSetRow(int lastSetRow) |
| void | setLowColumn(int lowColumn) |
| void | setOpenColumn(int openColumn) |
| void | setTimestampColumn(int timestampColumn) |
| int | timestampColumn() const |
Reimplemented Public Functions
| virtual Qt::Orientation | orientation() const override |
Signals
| void | closeColumnChanged() |
| void | firstSetRowChanged() |
| void | highColumnChanged() |
| void | lastSetRowChanged() |
| void | lowColumnChanged() |
| void | openColumnChanged() |
| void | timestampColumnChanged() |
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 data model and QCandlestickSeries, so that each row in the data model defines a candlestick item and each column maps to the open, high, low, close, and timestamp values of the candlestick item.
Both model and candlestick series properties can be used to manipulate the data. The model mapper keeps the candlestick series and the data model in sync.
The model mapper ensures that all the candlestick items in the candlestick series have equal sizes. Therefore, adding or removing a value from a candlestick item causes the same change to be made in all the candlestick items in the candlestick series.
See also QCandlestickSeries, QCandlestickSet, and QVCandlestickModelMapper.
Property Documentation
closeColumn : int
This property holds the column of the model that contains the close values of the candlestick items in the series.
The default value is -1 (invalid mapping).
Access functions:
| int | closeColumn() const |
| void | setCloseColumn(int closeColumn) |
Notifier signal:
| void | closeColumnChanged() |
firstSetRow : int
This property holds the row of the model that is used as the data source for the first item.
The default value is -1 (invalid mapping).
Access functions:
| int | firstSetRow() const |
| void | setFirstSetRow(int firstSetRow) |
Notifier signal:
| void | firstSetRowChanged() |
highColumn : int
This property holds the column of the model that contains the high values of the candlestick items in the series.
The default value is -1 (invalid mapping).
Access functions:
| int | highColumn() const |
| void | setHighColumn(int highColumn) |
Notifier signal:
| void | highColumnChanged() |
lastSetRow : int
This property holds the row of the model that is used as the data source for the last item.
The default value is -1 (invalid mapping).
Access functions:
| int | lastSetRow() const |
| void | setLastSetRow(int lastSetRow) |
Notifier signal:
| void | lastSetRowChanged() |
lowColumn : int
This property holds the column of the model that contains the low values of the candlestick items in the series.
The default value is -1 (invalid mapping).
Access functions:
| int | lowColumn() const |
| void | setLowColumn(int lowColumn) |
Notifier signal:
| void | lowColumnChanged() |
openColumn : int
This property holds the column of the model that contains the open values of the candlestick items in the series.
The default value is -1 (invalid mapping).
Access functions:
| int | openColumn() const |
| void | setOpenColumn(int openColumn) |
Notifier signal:
| void | openColumnChanged() |
timestampColumn : int
This property holds the column of the model that contains the timestamp values of the candlestick items in the series.
The default value is -1 (invalid mapping).
Access functions:
| int | timestampColumn() const |
| void | setTimestampColumn(int timestampColumn) |
Notifier signal:
| void | timestampColumnChanged() |
Member Function Documentation
QHCandlestickModelMapper::QHCandlestickModelMapper(QObject *parent = nullptr)
Constructs a horizontal model mapper object which is a child of parent.
[signal] void QHCandlestickModelMapper::closeColumnChanged()
Emitted when the column of the model that contains close values is changed.
Note: Notifier signal for property closeColumn.
See also closeColumn.
[signal] void QHCandlestickModelMapper::firstSetRowChanged()
Emitted when the row of the model that contains the data of the first item is changed.
Note: Notifier signal for property firstSetRow.
See also firstSetRow.
[signal] void QHCandlestickModelMapper::highColumnChanged()
Emitted when the column of the model that contains high values is changed.
Note: Notifier signal for property highColumn.
See also highColumn.
[signal] void QHCandlestickModelMapper::lastSetRowChanged()
Emitted when the row of the model that contains the data of the last item is changed.
Note: Notifier signal for property lastSetRow.
See also lastSetRow.
[signal] void QHCandlestickModelMapper::lowColumnChanged()
Emitted when the column of the model that contains low values is changed.
Note: Notifier signal for property lowColumn.
See also lowColumn.
[signal] void QHCandlestickModelMapper::openColumnChanged()
Emitted when the column of the model that contains open values is changed.
Note: Notifier signal for property openColumn.
See also openColumn.
[signal] void QHCandlestickModelMapper::timestampColumnChanged()
Emitted when the column of the model that contains timestamp values is changed
Note: Notifier signal for property timestampColumn.
See also timestampColumn.
[override virtual] Qt::Orientation QHCandlestickModelMapper::orientation() const
Reimplements: QCandlestickModelMapper::orientation() const.
Returns Qt::Horizontal. This means that values of the item are read from rows.