Struct PinchZoom 

pub(crate) struct PinchZoom {
    zoom_factor: f32,
    transform: Transform2D<f32, DevicePixel, DevicePixel>,
    unscaled_viewport_size: DeviceSize,
}

A PinchZoom describes the pinch zoom viewport of a WebView. This is used to track the current pinch zoom transformation and to clamp all pinching and panning to the unscaled WebView viewport.

Fields

zoom_factor: f32

transform: Transform2D<f32, DevicePixel, DevicePixel>

unscaled_viewport_size: DeviceSize

Implementations

impl PinchZoom

pub(crate) fn new(webview_rect: DeviceRect) -> Self

pub(crate) fn transform(&self) -> Transform2D<f32, DevicePixel, DevicePixel>

pub(crate) fn zoom_factor(&self) -> Scale<f32, DevicePixel, DevicePixel>

fn set_transform( &mut self, transform: Transform2D<f32, DevicePixel, DevicePixel>, )

pub(crate) fn zoom(&mut self, magnification: f32, new_center: DevicePoint)

pub(crate) fn pan( &mut self, scroll: &mut Scroll, scale: Scale<f32, CSSPixel, DevicePixel>, )

Pan the pinch zoom viewoprt by the given Scroll and if it is a delta, modify the delta to reflect the remaining unused scroll delta.

pub(crate) fn pan_with_device_scroll( &mut self, scroll: Scroll, scale: Scale<f32, CSSPixel, DevicePixel>, ) -> DeviceVector2D

Pan the pinch zoom viewport by the given delta and return the remaining device pixel value that was unused.

Trait Implementations

impl Clone for PinchZoom

fn clone(&self) -> PinchZoom

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PinchZoom

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

Formats the value using the given formatter.

impl PartialEq for PinchZoom

fn eq(&self, other: &PinchZoom) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for PinchZoom

impl StructuralPartialEq for PinchZoom