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ScaleStartEvent

Start payload for scale/transform interaction sequences.

Inherits: Event

Properties

  • global_focal_point - The initial focal point of the pointers in contact with the screen, in global coordinates.
  • local_focal_point - The initial focal point of the pointers in contact with the screen, in local coordinates.
  • pointer_count - The number of pointers being tracked by the gesture recognizer.
  • timestamp - Recorded timestamp of the source pointer event that triggered the scale event.

Properties​

global_focal_pointclass-attributeinstance-attribute​

global_focal_point: Offset = field(
    metadata={"data_field": "gfp"}
)

The initial focal point of the pointers in contact with the screen, in global coordinates.

local_focal_pointclass-attributeinstance-attribute​

local_focal_point: Offset = field(
    metadata={"data_field": "lfp"}
)

The initial focal point of the pointers in contact with the screen, in local coordinates.

pointer_countclass-attributeinstance-attribute​

pointer_count: int = field(metadata={'data_field': 'pc'})

The number of pointers being tracked by the gesture recognizer.

Typically this is the number of fingers being used to pan the control using the gesture recognizer.

timestampclass-attributeinstance-attribute​

timestamp: Duration | None = field(
    default=None, metadata={"data_field": "ts"}
)

Recorded timestamp of the source pointer event that triggered the scale event.

Could be None if triggered from proxied events such as accessibility.