Trait components::ZoomActionExt

pub trait ZoomActionExt: 'static {
    pub fn get_focal_point(&self) -> InternalPoint;
    pub fn get_transformed_focal_point(&self) -> InternalPoint;
    pub fn get_zoom_axis(&self) -> ZoomAxis;
    pub fn set_zoom_axis(&self, axis: ZoomAxis);
    pub fn connect_zoom<F>(&self, f: F) -> SignalHandlerId
    where
        F: 'static + Fn(&Self, &Actor, &InternalPoint, f64) -> bool;
    pub fn connect_property_zoom_axis_notify<F>(&self, f: F) -> SignalHandlerId
    where
        F: 'static + Fn(&Self);
}

Trait containing all ZoomAction methods.

Implementors

ZoomAction

Required methods

pub fn get_focal_point(&self) -> InternalPoint

Retrieves the focal point of the current zoom

point

a Point

pub fn get_transformed_focal_point(&self) -> InternalPoint

Retrieves the focal point relative to the actor’s coordinates of the current zoom

point

a Point

pub fn get_zoom_axis(&self) -> ZoomAxis

Retrieves the axis constraint set by ZoomActionExt::set_zoom_axis

Returns

the axis constraint

pub fn set_zoom_axis(&self, axis: ZoomAxis)

Restricts the zooming action to a specific axis

axis

the axis to constraint the zooming to

pub fn connect_zoom<F>(&self, f: F) -> SignalHandlerId where
    F: 'static + Fn(&Self, &Actor, &InternalPoint, f64) -> bool, 

The ::zoom signal is emitted for each series of touch events that change the distance and focal point between the touch points.

The default handler of the signal will call ActorExt::set_scale on actor using the ratio of the first distance between the touch points and the current distance. To override the default behaviour, connect to this signal and return false.

actor

the Actor attached to the action

focal_point

the focal point of the zoom

factor

the initial distance between the 2 touch points

Returns

true if the zoom should continue, and false if the zoom should be cancelled.

pub fn connect_property_zoom_axis_notify<F>(&self, f: F) -> SignalHandlerId where
    F: 'static + Fn(&Self), 

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Implementors

impl<O> ZoomActionExt for O where
    O: IsA<ZoomAction>, 

pub fn get_focal_point(&self) -> InternalPoint

pub fn get_transformed_focal_point(&self) -> InternalPoint

pub fn get_zoom_axis(&self) -> ZoomAxis

pub fn set_zoom_axis(&self, axis: ZoomAxis)

pub fn connect_zoom<F>(&self, f: F) -> SignalHandlerId where
    F: 'static + Fn(&O, &Actor, &InternalPoint, f64) -> bool, 

pub fn connect_property_zoom_axis_notify<F>(&self, f: F) -> SignalHandlerId where
    F: 'static + Fn(&O), 

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