ItemModelScatterDataProxy QML Type

Proxy class for presenting data in item models with Scatter3D . 更多...

导入语句：	import QtDataVisualization 1.2
Since:	QtDataVisualization 1.0
实例化：	QItemModelScatterDataProxy
继承：	ScatterDataProxy

所有成员列表，包括继承成员

特性

itemModel : model
rotationRole : string
rotationRolePattern : regExp
rotationRoleReplace : string
xPosRole : string
xPosRolePattern : regExp
xPosRoleReplace : string
yPosRole : string
yPosRolePattern : regExp
yPosRoleReplace : string
zPosRole : string
zPosRolePattern : regExp
zPosRoleReplace : string

详细描述

This type allows you to use AbstractItemModel derived models as a data source for Scatter3D .

The data is resolved asynchronously whenever the mapping or the model changes. QScatterDataProxy::arrayReset() is emitted when the data has been resolved.

更多细节，见 QItemModelScatterDataProxy 文档编制。

用法范例：

ItemModelScatterDataProxy {
    itemModel: model // E.g. a list model defined elsewhere containing point coordinates.
    // Mapping model roles to scatter series item coordinates.
    xPosRole: "xPos"
    yPosRole: "yPos"
    zPosRole: "zPos"
}

另请参阅 ScatterDataProxy and Qt Data Visualization 数据处理 .

特性文档编制

itemModel : model

The item model to use as a data source for Scatter3D .

rotationRole : string

The item model role to map into item rotation. The model may supply the value for rotation as either variant that is directly convertible to quaternion , or as one of the string representations: "scalar,x,y,z" or "@angle,x,y,z" . The first format will construct the quaternion directly with given values, and the second one will construct the quaternion 使用 QQuaternion::fromAxisAndAngle() 方法。

rotationRolePattern : regExp

When set, a search and replace is done on the value mapped by the rotation role before it is used as item rotation. This property specifies the regular expression to find the portion of the mapped value to replace and rotationRoleReplace property contains the replacement string.

另请参阅 rotationRole and rotationRoleReplace .

rotationRoleReplace : string

This property defines the replace content to be used in conjunction with rotationRolePattern . Defaults to an empty string. For more information on how the search and replace using regular expressions works, see QString::replace (const QRegExp &rx, const QString &after) function documentation.

另请参阅 rotationRole and rotationRolePattern .

xPosRole : string

The item model role to map into the X position.

xPosRolePattern : regExp

When set, a search and replace is done on the value mapped by the x position role before it is used as an item position value. This property specifies the regular expression to find the portion of the mapped value to replace and xPosRoleReplace property contains the replacement string.

另请参阅 xPosRole and xPosRoleReplace .

xPosRoleReplace : string

This property defines the replace content to be used in conjunction with xPosRolePattern . Defaults to an empty string. For more information on how the search and replace using regular expressions works, see QString::replace (const QRegExp &rx, const QString &after) function documentation.

另请参阅 xPosRole and xPosRolePattern .

yPosRole : string

The item model role to map into the Y position.

yPosRolePattern : regExp

When set, a search and replace is done on the value mapped by the y position role before it is used as an item position value. This property specifies the regular expression to find the portion of the mapped value to replace and yPosRoleReplace property contains the replacement string.

另请参阅 yPosRole and yPosRoleReplace .

yPosRoleReplace : string

This property defines the replace content to be used in conjunction with yPosRolePattern . Defaults to an empty string. For more information on how the search and replace using regular expressions works, see QString::replace (const QRegExp &rx, const QString &after) function documentation.

另请参阅 yPosRole and yPosRolePattern .

zPosRole : string

The item model role to map into the Z position.

zPosRolePattern : regExp

When set, a search and replace is done on the value mapped by the z position role before it is used as an item position value. This property specifies the regular expression to find the portion of the mapped value to replace and zPosRoleReplace property contains the replacement string.

另请参阅 zPosRole and zPosRoleReplace .

zPosRoleReplace : string

This property defines the replace content to be used in conjunction with zPosRolePattern . Defaults to an empty string. For more information on how the search and replace using regular expressions works, see QString::replace (const QRegExp &rx, const QString &after) function documentation.

另请参阅 zPosRole and zPosRolePattern .