- Qt 6.11
- Qt Data Visualization
- QML Types
- ItemModelScatterDataProxy
- Qt Data Visualization | Commercial or GPLv3

# ItemModelScatterDataProxy QML Type

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

Import Statement: | `import QtDataVisualization 1.11`
Since: | QtDataVisualization 1.0
In C++: | QItemModelScatterDataProxy
Inherits: | ScatterDataProxy

- List of all members, including inherited members

## Properties

- 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

## Detailed Description

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.

For more details, see QItemModelScatterDataProxy documentation.

Usage example:

     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"
     }

See also ScatterDataProxy and Qt Data Visualization Data Handling.

## Property Documentation

### 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 using QQuaternion::fromAxisAndAngle() method.

### 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.

See also 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 QRegularExpression &rx, const QString &after) function documentation.

See also 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.

See also 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 QRegularExpression &rx, const QString &after) function documentation.

See also 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.

See also 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 QRegularExpression &rx, const QString &after) function documentation.

See also 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.

See also 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 QRegularExpression &rx, const QString &after) function documentation.

See also zPosRole and zPosRolePattern.