Struct ImageInstance

pub struct ImageInstance { /* private fields */ }

Trait Implementations

impl InstanceNode for ImageInstance

fn instantiate(args: InstantiationArgs) -> Rc<ImageInstance>

where ImageInstance: Sized,

fn handle_mount( self: Rc<ImageInstance>, expanded_node: &Rc<ExpandedNode>, context: &Rc<RuntimeContext>, )

Fires during the tick when a node is first attached to the render tree. For example, this event fires by all nodes on the global first tick, and by all nodes in a subtree when a Conditional subsequently turns on a subtree (i.e. when the Conditionals criterion becomes true after being false through the end of at least 1 frame.) A use-case: send a message to native renderers that a Text element should be rendered and tracked

fn update( self: Rc<ImageInstance>, _expanded_node: &Rc<ExpandedNode>, _context: &Rc<RuntimeContext>, )

Updates the expanded node, recomputing its properties and possibly updating its children

fn handle_unmount( &self, expanded_node: &Rc<ExpandedNode>, _context: &Rc<RuntimeContext>, )

Fires during element unmount, when an element is about to be removed from the render tree (e.g. by a Conditional) A use-case: send a message to native renderers that a Text element should be removed

fn render( &self, expanded_node: &ExpandedNode, rtc: &Rc<RuntimeContext>, rc: &mut dyn RenderContext, )

Third lifecycle method during each render loop, occurs after all descendents have been rendered. Occurs in a post-order traversal of the render tree. Most primitives are expected to draw their contents to the rendering context during this event.

fn base(&self) -> &BaseInstance

Retrieves the base instance, containing common functionality that all instances share

fn resolve_debug( &self, f: &mut Formatter<'_>, _expanded_node: Option<&ExpandedNode>, ) -> Result<(), Error>

fn handle_pre_render( &self, expanded_node: &ExpandedNode, context: &Rc<RuntimeContext>, rcs: &mut dyn RenderContext, )

Second lifecycle method during each render loop, occurs after properties have been computed, but before rendering Example use-case: perform side-effects to the drawing contexts. This is how [Frame] performs clipping, for example. Occurs in a pre-order traversal of the render tree.

fn handle_post_render( &self, expanded_node: &ExpandedNode, context: &Rc<RuntimeContext>, rcs: &mut dyn RenderContext, )

Fourth and final lifecycle method during each render loop, occurs after all descendents have been rendered AND the current node has been rendered. Useful for clean-up, e.g. this is where Frame cleans up the drawing contexts to stop clipping. Occurs in a post-order traversal of the render tree.

fn handle_scroll(&self, args_scroll: Scroll)

Invoked by event interrupts to pass scroll information to render node

fn get_template(&self) -> Option<&RefCell<Vec<Rc<dyn InstanceNode>>>>

fn clips_content(&self, _expanded_node: &ExpandedNode) -> bool

Used by frame to control content clipping

fn handle_native_interrupt( &self, _expanded_node: &Rc<ExpandedNode>, _interrupt: &NativeInterrupt, )

fn handle_control_flow_node_expansion( self: Rc<Self>, _expanded_node: &Rc<ExpandedNode>, _context: &Rc<RuntimeContext>, )

fn handle_setup_slot_children( self: Rc<Self>, _expanded_node: &Rc<ExpandedNode>, _context: &Rc<RuntimeContext>, )