A model mapper for XYSeries . 更多...
| import 语句： |
import QtGraphs
|
| 在 C++： | QXYModelMapper |
模型映射器允许使用的数据模型派生自 QAbstractItemModel class as a data source for a graph. A model mapper is used to create a connection between a line, spline, or scatter series. 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.
另请参阅 XYSeries .
|
count : qsizetype |
The number of rows of the model that are mapped as the data for series. The default value is -1 (the number is limited by the number of rows in the model).
另请参阅 orientation .
|
first : qsizetype |
The row of the model that contains the data for the first point of the series. The default value is 0.
另请参阅 orientation .
|
model : SomeModel |
The data model that is used by the mapper. You need to implement the model and expose it to QML.
注意： The model has to support adding and removing rows or columns and modifying the data in the cells.
|
orientation : orientation |
Tells the modelmapper how to map data from a model. If
Qt.Vertical
is used, the model has
X
and
Y
columns, and the model's rows define the data points. When the orientation is set to
Qt.Horizontal
, the model has
X
and
Y
rows, and the model's columns define the data points.
|
series : XYSeries |
The 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).
|
xSection : qsizetype |
the section of the model that contains the x-coordinates of data points. The default value is -1 (invalid mapping).
另请参阅 orientation .
|
ySection : qsizetype |
the section of the model that contains the y-coordinates of data points. The default value is -1 (invalid mapping).
另请参阅 orientation .
|
countChanged () |
This signal is emitted when the number of rows changes.
注意：
相应处理程序是
onCountChanged
.
|
firstChanged () |
This signal is emitted when the first row changes.
注意：
相应处理程序是
onFirstChanged
.
|
modelChanged () |
This signal is emitted when the model that the mapper is connected to changes.
注意：
相应处理程序是
onModelChanged
.
|
xSectionChanged () |
This signal is emitted when the section that contains the x-coordinates of data points changes.
注意：
相应处理程序是
onXSectionChanged
.
|
ySectionChanged () |
This signal is emitted when the section that contains the y-coordinates of data points changes.
注意：
相应处理程序是
onYSectionChanged
.
