內容

• 特性
• 公共函數
• 信號
• 詳細描述

QHBarModelMapper Class

The QHBarModelMapper class is a horizontal model mapper for bar series. 更多...

頭：	#include <QHBarModelMapper>
實例化：	HBarModelMapper
繼承：	QObject

• 所有成員列錶，包括繼承成員

特性

columnCount : int firstBarSetRow : int firstColumn : int

lastBarSetRow : int model : QAbstractItemModel * series : QAbstractBarSeries *

• 1 特性繼承自 QObject

公共函數

	QHBarModelMapper (QObject * parent = Q_NULLPTR)
int	columnCount () const
int	firstBarSetRow () const
int	firstColumn () const
int	lastBarSetRow () const
QAbstractItemModel *	model () const
QAbstractBarSeries *	series () const
void	setColumnCount (int columnCount )
void	setFirstBarSetRow (int firstBarSetRow )
void	setFirstColumn (int firstColumn )
void	setLastBarSetRow (int lastBarSetRow )
void	setModel (QAbstractItemModel * model )
void	setSeries (QAbstractBarSeries * series )

• 32 公共函數繼承自 QObject

信號

void	columnCountChanged ()
void	firstBarSetRowChanged ()
void	firstColumnChanged ()
void	lastBarSetRowChanged ()
void	modelReplaced ()
void	seriesReplaced ()

• 2 信號繼承自 QObject

額外繼承成員

• 1 公共槽繼承自 QObject
• 11 靜態公共成員繼承自 QObject
• 9 保護函數繼承自 QObject

詳細描述

The QHBarModelMapper class is a horizontal model mapper for bar series.

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 horizontal model mapper is used to create a connection between a data model and QAbstractBarSeries , so that each row in the data model defines a bar set and each column maps to a category in a bar series.

Both model and bar series properties can be used to manipulate the data. The model mapper keeps the bar series and the data model in sync.

The model mapper ensures that all the bar sets in the bar series have equal sizes. Therefore, adding or removing a value from a bar set causes the same change to be made in all the bar sets in the bar series.

另請參閱 QVBarModelMapper .

特性文檔編製

columnCount : int

This property holds the number of columns of the model that are mapped as the data for the bar series.

The minimum and default value is -1 (number limited to the number of columns in the model).

訪問函數：

int	columnCount () const
void	setColumnCount (int columnCount )

通知程序信號：

void	columnCountChanged ()

firstBarSetRow : int

This property holds the row of the model that is used as the data source for the first bar set.

默認值為 -1 (無效映射)。

訪問函數：

int	firstBarSetRow () const
void	setFirstBarSetRow (int firstBarSetRow )

通知程序信號：

void	firstBarSetRowChanged ()

firstColumn : int

This property holds the column of the model that contains the first values of the bar sets in the bar series.

最小且默認值為 0。

訪問函數：

int	firstColumn () const
void	setFirstColumn (int firstColumn )

通知程序信號：

void	firstColumnChanged ()

lastBarSetRow : int

This property holds the row of the model that is used as the data source for the last bar set.

默認值為 -1 (無效映射)。

訪問函數：

int	lastBarSetRow () const
void	setLastBarSetRow (int lastBarSetRow )

通知程序信號：

void	lastBarSetRowChanged ()

model : QAbstractItemModel *

定義映射器使用的模型。

訪問函數：

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

通知程序信號：

void	modelReplaced ()

series : QAbstractBarSeries *

This property holds the bar 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：

QAbstractBarSeries *	series () const
void	setSeries (QAbstractBarSeries * series )

通知程序信號：

void	seriesReplaced ()

成員函數文檔編製

QHBarModelMapper:: QHBarModelMapper ( QObject * parent = Q_NULLPTR)

構造映射器對象為子級化 parent .

[signal] void QHBarModelMapper:: columnCountChanged ()

This signal is emitted when the number of columns changes.

注意： 通知程序信號對於特性 columnCount .

[signal] void QHBarModelMapper:: firstBarSetRowChanged ()

This signal is emitted when the first bar set row changes.

注意： 通知程序信號對於特性 firstBarSetRow .

[signal] void QHBarModelMapper:: firstColumnChanged ()

This signal is emitted when the first column changes.

注意： 通知程序信號對於特性 firstColumn .

[signal] void QHBarModelMapper:: lastBarSetRowChanged ()

This signal is emitted when the last bar set row changes.

注意： 通知程序信號對於特性 lastBarSetRow .

[signal] void QHBarModelMapper:: 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 QHBarModelMapper:: 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 .