QHPieModelMapper Class
The QHPieModelMapper is a horizontal model mapper for pie series. More...
| Header: | #include <QHPieModelMapper> |
| Instantiated By: | HPieModelMapper |
| Inherits: | QPieModelMapper |
Properties
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Public Functions
| int | columnCount() const |
| int | firstColumn() const |
| int | labelsRow() const |
| QAbstractItemModel * | model() const |
| QPieSeries * | series() const |
| void | setColumnCount(int columnCount) |
| void | setFirstColumn(int firstColumn) |
| void | setLabelsRow(int labelsRow) |
| void | setModel(QAbstractItemModel *model) |
| void | setSeries(QPieSeries *series) |
| void | setValuesRow(int valuesRow) |
| int | valuesRow() const |
Signals
| void | columnCountChanged() |
| void | firstColumnChanged() |
| void | labelsRowChanged() |
| void | modelReplaced() |
| void | seriesReplaced() |
| void | valuesRowChanged() |
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 QPieSeries, so that each column in the data model defines a pie slice and each row maps to the label or the value of the pie slice.
Both model and pie series properties can be used to manipulate the data. The model mapper keeps the pie series and the data model in sync.
Property Documentation
columnCount : int
This property holds the number of columns of the model that are mapped as the data for the pie series.
The minimum and default value is -1 (number limited to the number of columns in the model).
Access functions:
| int | columnCount() const |
| void | setColumnCount(int columnCount) |
Notifier signal:
| void | columnCountChanged() |
firstColumn : int
This property holds the column of the model that contains the first slice value.
The minimum and default value is 0.
Access functions:
| int | firstColumn() const |
| void | setFirstColumn(int firstColumn) |
Notifier signal:
| void | firstColumnChanged() |
labelsRow : int
This property holds the row of the model that is kept in sync with the labels of the pie's slices.
The default value is -1 (invalid mapping).
Access functions:
| int | labelsRow() const |
| void | setLabelsRow(int labelsRow) |
Notifier signal:
| void | labelsRowChanged() |
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 : QtCharts::QPieSeries*
This property holds the pie 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:
| QPieSeries * | series() const |
| void | setSeries(QPieSeries *series) |
Notifier signal:
| void | seriesReplaced() |
valuesRow : int
This property holds the row of the model that is kept in sync with the values of the pie's slices.
The default value is -1 (invalid mapping).
Access functions:
| int | valuesRow() const |
| void | setValuesRow(int valuesRow) |
Notifier signal:
| void | valuesRowChanged() |