By default, the OffsetToValue property is empty. If the OffsetToValue property is empty, missing or invalid, it has no effect. If the OffsetToValue property is valid, the result of evaluation of the OffsetToValue property indicates the layer's Value property. The ValueToOffsetX / ValueToOffsetY property converts the value back to an offset. Use the DefaultLayer(exDefLayerOffsetToValue) property to specify the default value for the OffsetToValue property, before adding the layer.

For instance:

• "0", specifies that the layer's value is always 0 no matter of the offset of the layer
• "value = 0 ? 0 : 1", equivalent with "offsetx = 0 ? 0 : 1" indicates that if the layer's OffsetX is 0, the value is 0 else it is one
• "offsety = 0 ? 0 : 1", indicates that if the layer's OffsetY is 0, the value is 0 else it is one

The OffsetToValue property supports the following keywords:

• value or offsetx keyword indicates the layer's OffsetX property
• offsety keyword indicates the layer's OffsetY property

Also, this property supports all constants, operators and functions defined here.

The Value property indicates the value keyword in the following properties:

• ValueToOffsetX, Specifies the expression to convert the value to x-offset. The layer's OffsetX property is the result of evaluating the ValueToOffsetX expression, while the OnDrag property is exDoMove. The OffsetToValue converts the current offset to a value.
• ValueToOffsetY, Specifies the expression to convert the value to y-offset. The layer's OffsetY property is the result of evaluating the ValueToOffsetY expression, while the OnDrag property is exDoMove. The OffsetToValue converts the current offset to a value.
• ValueToRotateAngle, Specifies the expression to convert the value to rotating angle. The layer's RotateAngle property is the result of evaluating the ValueToRotateAngle expression, while the OnDrag property is exDoRotate or exDoRotamove. The RotateAngleToValue converts the current rotation angle to a value.

The Value property works in association with the layer's OnDrag property like follows:

• If the OnDrag property is exDoMove, evaluating the ValueToOffsetX property indicates the layer's OffsetX property.
• If the OnDrag property is exDoMove, evaluating the ValueToOffsetY property indicates the layer's OffsetY property.
• If the OnDrag property is exDoRotate or exDoRotamove, evaluating the ValueToRotateAngle property indicates the layer's RotateAngle property.