Struct Opacity

#[repr(C)]
pub struct Opacity {
    pub opacity: Property<f32>,
    pub cached_rendering_data: CachedRenderingData,
}

The Opacity Item is not meant to be used directly by the .slint code, instead, the opacity: xxx or visible: false should be used

Fields

opacity: Property<f32>

cached_rendering_data: CachedRenderingData

Implementations

impl Opacity

pub const FIELD_OFFSETS: OpacityFieldsOffsets

Return a struct containing the offset of for the fields of this struct

impl Opacity

pub fn opacity(self: Pin<&Self>) -> f32

impl Opacity

pub fn need_layer(self_rc: &ItemRc, opacity: f32) -> bool

Trait Implementations

impl Default for Opacity

fn default() -> Opacity

Returns the “default value” for a type.

impl HasStaticVTable<ItemVTable> for Opacity

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl Item for Opacity

fn init(self: Pin<&Self>, _self_rc: &ItemRc)

This function is called by the run-time after the memory for the item has been allocated and initialized. It will be called before any user specified bindings are set.

fn layout_info( self: Pin<&Self>, _orientation: Orientation, _window_adapter: &Rc<dyn WindowAdapter>, ) -> LayoutInfo

We would need max/min/preferred size, and all layout info

fn input_event_filter_before_children( self: Pin<&Self>, _: MouseEvent, _window_adapter: &Rc<dyn WindowAdapter>, _self_rc: &ItemRc, ) -> InputEventFilterResult

Event handler for mouse and touch event. This function is called before being called on children. Then, depending on the return value, it is called for the children, and their children, then Self::input_event is called on the children, and finally Self::input_event is called on this item again.

fn input_event( self: Pin<&Self>, _: MouseEvent, _window_adapter: &Rc<dyn WindowAdapter>, _self_rc: &ItemRc, ) -> InputEventResult

Handle input event for mouse and touch event

fn key_event( self: Pin<&Self>, _: &KeyEvent, _window_adapter: &Rc<dyn WindowAdapter>, _self_rc: &ItemRc, ) -> KeyEventResult

fn focus_event( self: Pin<&Self>, _: &FocusEvent, _window_adapter: &Rc<dyn WindowAdapter>, _self_rc: &ItemRc, ) -> FocusEventResult

fn render( self: Pin<&Self>, backend: &mut &'_ mut dyn ItemRenderer, self_rc: &ItemRc, size: LogicalSize, ) -> RenderingResult

impl ItemConsts for Opacity

const cached_rendering_data_offset: FieldOffset<Opacity, CachedRenderingData>

offset in bytes from the *const ItemImpl. isize::MAX means None

impl<'__dummy_lifetime> Unpin for Opacity

where __MustNotImplUnpin<'__dummy_lifetime>: Unpin,