QVXYModelMapper 類

QVXYModelMapper 類是一個用於直綫、樣條綫及散點係列的垂直模型映射器。 更多...

頭：	#include <QVXYModelMapper>
實例化：	VXYModelMapper
繼承：	QXYModelMapper

• 所有成員列錶，包括繼承成員

特性

firstRow : int model : QAbstractItemModel* rowCount : int

series : QtCharts::QXYSeries* xColumn : int yColumn : int

公共函數

	QVXYModelMapper (QObject * parent = nullptr)
int	firstRow () const
QAbstractItemModel *	model () const
int	rowCount () const
QXYSeries *	series () const
void	setFirstRow (int firstRow )
void	setModel (QAbstractItemModel * model )
void	setRowCount (int rowCount )
void	setSeries (QXYSeries * series )
void	setXColumn (int xColumn )
void	setYColumn (int yColumn )
int	xColumn () const
int	yColumn () const

信號

void	firstRowChanged ()
void	modelReplaced ()
void	rowCountChanged ()
void	seriesReplaced ()
void	xColumnChanged ()
void	yColumnChanged ()

詳細描述

模型映射器允許使用的數據模型派生自 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.

另請參閱 QHXYModelMapper , QXYSeries ，和 模型數據範例 .

特性文檔編製

firstRow : int

This property holds the row of the model that contains the data for the first point of the series.

最小且默認值為 0。

訪問函數：

int	firstRow () const
void	setFirstRow (int firstRow )

通知程序信號：

void	firstRowChanged ()

model : QAbstractItemModel *

此特性保持映射器使用的模型。

訪問函數：

QAbstractItemModel *	model () const
void	setModel (QAbstractItemModel * model )

通知程序信號：

void	modelReplaced ()

rowCount : 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).

訪問函數：

int	rowCount () const
void	setRowCount (int rowCount )

通知程序信號：

void	rowCountChanged ()

series : QtCharts::QXYSeries *

This property holds 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).

訪問函數：

QXYSeries *	series () const
void	setSeries (QXYSeries * series )

通知程序信號：

void	seriesReplaced ()

xColumn : int

This property holds the column of the model that contains the x-coordinates of data points.

默認值為 -1 (無效映射)。

訪問函數：

int	xColumn () const
void	setXColumn (int xColumn )

通知程序信號：

void	xColumnChanged ()

yColumn : int

This property holds the column of the model that contains the y-coordinates of data points.

默認值為 -1 (無效映射)。

訪問函數：

int	yColumn () const
void	setYColumn (int yColumn )

通知程序信號：

void	yColumnChanged ()

成員函數文檔編製

QVXYModelMapper:: QVXYModelMapper ( QObject * parent = nullptr)

構造映射器對象為子級化 parent .

[signal] void QVXYModelMapper:: firstRowChanged ()

This signal is emitted when the first row changes.

注意： 通知程序信號對於特性 firstRow .

[signal] void QVXYModelMapper:: modelReplaced ()

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

注意： 通知程序信號對於特性 model .

[signal] void QVXYModelMapper:: rowCountChanged ()

This signal is emitted when the number of rows changes.

注意： 通知程序信號對於特性 rowCount .

[signal] void QVXYModelMapper:: seriesReplaced ()

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

注意： 通知程序信號對於特性 series .

[signal] void QVXYModelMapper:: xColumnChanged ()

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

注意： 通知程序信號對於特性 xColumn .

[signal] void QVXYModelMapper:: yColumnChanged ()

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

注意： 通知程序信號對於特性 yColumn .

內容

1. 特性

2. 公共函數

3. 信號

4. 詳細描述