Struct zng::touch::TouchTransformArgs

pub struct TouchTransformArgs {
    pub timestamp: DInstant,
    pub window_id: WindowId,
    pub device_id: DeviceId,
    pub first_info: TouchTransformInfo,
    pub latest_info: TouchTransformInfo,
    pub velocity: [Vector2D<Px, Px>; 2],
    pub scale_factor: Factor,
    pub phase: TouchPhase,
    pub hits: HitTestInfo,
    pub target: InteractionPath,
    pub capture: Option<CaptureInfo>,
    pub modifiers: ModifiersState,
    /* private fields */
}

Arguments for TOUCH_TRANSFORM_EVENT.

Fields

timestamp: DInstant

Instant the event happened.

window_id: WindowId

Id of window that received the touch events.

device_id: DeviceId

Id of the device that generated the touch events.

first_info: TouchTransformInfo

Info collected when the second touch point started.

latest_info: TouchTransformInfo

Latest update of the two points.

velocity: [Vector2D<Px, Px>; 2]

Velocity of the latest_info touch points.

scale_factor: Factor

Scale factor used in the computed pixel values.

This is the window’s scale factor when the first touch started.

phase: TouchPhase

Gesture phase.

hits: HitTestInfo

Hit-test result for the center point between the first position of the two touches in the window when the gesture started.

target: InteractionPath

Full path to the top-most hit in hits.

capture: Option<CaptureInfo>

Current pointer capture.

modifiers: ModifiersState

What modifier keys where pressed when this event happened.

Implementations

impl TouchTransformArgs

pub fn new( timestamp: impl Into<DInstant>, propagation_handle: EventPropagationHandle, window_id: impl Into<WindowId>, device_id: impl Into<DeviceId>, first_info: impl Into<TouchTransformInfo>, latest_info: impl Into<TouchTransformInfo>, velocity: impl Into<[Vector2D<Px, Px>; 2]>, scale_factor: impl Into<Factor>, phase: impl Into<TouchPhase>, hits: impl Into<HitTestInfo>, target: impl Into<InteractionPath>, capture: impl Into<Option<CaptureInfo>>, modifiers: impl Into<ModifiersState>, ) -> TouchTransformArgs

New args from values that convert into the argument types.

pub fn now( window_id: impl Into<WindowId>, device_id: impl Into<DeviceId>, first_info: impl Into<TouchTransformInfo>, latest_info: impl Into<TouchTransformInfo>, velocity: impl Into<[Vector2D<Px, Px>; 2]>, scale_factor: impl Into<Factor>, phase: impl Into<TouchPhase>, hits: impl Into<HitTestInfo>, target: impl Into<InteractionPath>, capture: impl Into<Option<CaptureInfo>>, modifiers: impl Into<ModifiersState>, ) -> TouchTransformArgs

Arguments for event that happened now (INSTANT.now).

impl TouchTransformArgs

pub fn capture_allows(&self) -> bool

If capture is None or allows the WIDGET to receive this event.

pub fn is_enabled(&self, widget_id: WidgetId) -> bool

If the widget_id is in the target is enabled.

pub fn is_disabled(&self, widget_id: WidgetId) -> bool

If the widget_id is in the target is disabled.

pub fn local_info(&self) -> [TouchTransformInfo; 2]

Gets the first_info and latest_info in the WIDGET inner bounds space.

pub fn translation(&self) -> Vector2D<f32, Px>

Computes the translation to transform from first_info to latest_info.

pub fn translation_x(&self) -> f32

Computes the translation-x to transform from first_info to latest_info.

pub fn translation_y(&self) -> f32

Computes the translation-y to transform from first_info to latest_info.

pub fn rotation(&self) -> AngleRadian

Computes the rotation to transform from first_info to latest_info.

pub fn scale(&self) -> Factor

Computes the scale to transform from first_info to latest_info.

pub fn scale_x(&self) -> Factor

Computes the scale-y to transform from first_info to latest_info.

pub fn scale_y(&self) -> Factor

Computes the scale-y to transform from first_info to latest_info.

pub fn transform(&self, mode: TouchTransformMode) -> PxTransform

Computes the transform from first_info to latest_info.

pub fn local_transform(&self, mode: TouchTransformMode) -> PxTransform

Computes the transform between the local_info values, rotates and scales around the latest center.

pub fn translation_velocity(&self) -> Vector2D<Px, Px>

Average velocity.

pub fn translation_inertia_x(&self, deceleration: Dip) -> (Px, Duration)

Compute the final offset and duration for a fling animation that simulates inertia movement from the translation_velocity().x and deceleration. Returns 0 if velocity less than min_fling_velocity.

Deceleration is in dip/s, a good value is 1000. The recommended animation easing function is |t| easing::ease_out(easing::quad, t).

pub fn translation_inertia_y(&self, deceleration: Dip) -> (Px, Duration)

Compute the final offset and duration for a fling animation that simulates inertia movement from the translation_velocity().y and deceleration. Returns 0 if velocity less than min_fling_velocity.

Deceleration is in dip/s, a good value is 1000. The recommended animation easing function is |t| easing::ease_out(easing::quad, t).

pub fn is_start(&self) -> bool

If the phase is start.

Note that the latest_info may already be different from first_info if the gesture detector awaited to disambiguate before starting the gesture.

pub fn is_end(&self) -> bool

If the phase is end.

Any transform already applied must be committed.

pub fn is_cancel(&self) -> bool

If the phase is cancel.

Any transform already applied must be undone.

Trait Implementations

impl AnyEventArgs for TouchTransformArgs

fn delivery_list(&self, list: &mut UpdateDeliveryList)

The target and capture.

fn clone_any(&self) -> Box<dyn AnyEventArgs>

Clone the event into a type erased box.

fn as_any(&self) -> &(dyn Any + 'static)

Access to dyn Any methods.

fn timestamp(&self) -> DInstant

Gets the instant this event happened.

fn propagation(&self) -> &EventPropagationHandle

Propagation handle associated with this event instance.

impl Clone for TouchTransformArgs

fn clone(&self) -> TouchTransformArgs

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TouchTransformArgs

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl EventArgs for TouchTransformArgs

fn handle<F, R>(&self, handler: F) -> Option<R>

where F: FnOnce(&Self) -> R,

Calls handler and stops propagation if propagation is still allowed.