Struct Touch

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pub struct Touch(/* private fields */);

Expand description

The Touch interface represents a single contact point on a touch-sensitive device. The contact point is commonly a finger or stylus and the device may be a touchscreen or trackpad.

(JavaScript docs)

Implementations§

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impl Touch

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pub fn identifier(&self) -> i32

Returns a unique identifier for this Touch object. A given touch point (say, by a finger) will have the same identifier for the duration of its movement around the surface. This lets you ensure that you’re tracking the same touch all the time.

(JavaScript docs)

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pub fn screen_x(&self) -> f64

Returns the X coordinate of the touch point relative to the left edge of the screen.

(JavaScript docs)

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pub fn screen_y(&self) -> f64

Returns the Y coordinate of the touch point relative to the left edge of the screen.

(JavaScript docs)

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pub fn client_x(&self) -> f64

Returns the X coordinate of the touch point relative to the left edge of the browser viewport, not including any scroll offset.

(JavaScript docs)

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pub fn client_y(&self) -> f64

Returns the Y coordinate of the touch point relative to the left edge of the browser viewport, not including any scroll offset.

(JavaScript docs)

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pub fn page_x(&self) -> f64

Returns the X coordinate of the touch point relative to the left edge of the document. Unlike clientX, this value includes the horizontal scroll offset, if any.

(JavaScript docs)

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pub fn page_y(&self) -> f64

Returns the Y coordinate of the touch point relative to the left edge of the document. Unlike clientX, this value includes the horizontal scroll offset, if any.

(JavaScript docs)

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pub fn target(&self) -> EventTarget

Returns the Element on which the touch point started when it was first placed on the surface, even if the touch point has since moved outside the interactive area of that element or even been removed from the document.

(JavaScript docs)

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pub fn radius_x(&self) -> f64

Returns the X radius of the ellipse that most closely circumscribes the area of contact with the screen. The value is in pixels of the same scale as screenX.

(JavaScript docs)

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pub fn radius_y(&self) -> f64

Returns the Y radius of the ellipse that most closely circumscribes the area of contact with the screen. The value is in pixels of the same scale as screenY.

(JavaScript docs)

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pub fn rotation_angle(&self) -> f64

Returns the angle (in degrees) that the ellipse described by radiusX and radiusY must be rotated, clockwise, to most accurately cover the area of contact between the user and the surface.

(JavaScript docs)

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pub fn force(&self) -> f64

Returns the amount of pressure being applied to the surface by the user, as a float between 0.0 (no pressure) and 1.0 (maximum pressure).

(JavaScript docs)

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pub fn altitude_angle(&self) -> f64

The altitude (in radians) of a stylus, in the range 0 (parallel to the surface) to π/2 (perpendicular to the surface). The value 0 should be used for devices which do not support this property.

(JavaScript docs)

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pub fn azimuth_angle(&self) -> f64

The azimuth angle (in radians) of a stylus, in the range 0 to 2π. 0 represents a stylus whose cap is pointing in the direction of increasing screenX values. π/2 represents a stylus whose cap is pointing in the direction of increasing screenY values. The value 0 should be used for devices which do not support this property.

(JavaScript docs)

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