Struct ContextImpl

struct ContextImpl {

    fonts: BTreeMap<OrderedFloat<f32>, Fonts>,
    font_definitions: FontDefinitions,
    memory: Memory,
    animation_manager: AnimationManager,
    plugins: Plugins,
    tex_manager: WrappedTextureManager,
    new_zoom_factor: Option<f32>,
    os: OperatingSystem,
    viewport_stack: Vec<ViewportIdPair>,
    last_viewport: ViewportId,
    paint_stats: PaintStats,
    request_repaint_callback: Option<Box<dyn Fn(RequestRepaintInfo) + Send + Sync>>,
    viewport_parents: ViewportIdMap<ViewportId>,
    viewports: ViewportIdMap<ViewportState>,
    embed_viewports: bool,
    loaders: Arc<Loaders>,
}

Fields

fonts: BTreeMap<OrderedFloat<f32>, Fonts>

Since we could have multiple viewports across multiple monitors with different pixels_per_point, we need a Fonts instance for each unique pixels_per_point. This is because the Fonts depend on pixels_per_point for the font atlas as well as kerning, font sizes, etc.

font_definitions: FontDefinitions

memory: Memory

animation_manager: AnimationManager

plugins: Plugins

tex_manager: WrappedTextureManager

All viewports share the same texture manager and texture namespace.

In all viewports, TextureId::default is special, and points to the font atlas. The font-atlas texture may be different across viewports, as they may have different pixels_per_point, so we do special book-keeping for that. See https://github.com/emilk/egui/issues/3664.

new_zoom_factor: Option<f32>

Set during the pass, becomes active at the start of the next pass.

os: OperatingSystem

viewport_stack: Vec<ViewportIdPair>

How deeply nested are we?

last_viewport: ViewportId

What is the last viewport rendered?

paint_stats: PaintStats

request_repaint_callback: Option<Box<dyn Fn(RequestRepaintInfo) + Send + Sync>>

viewport_parents: ViewportIdMap<ViewportId>

viewports: ViewportIdMap<ViewportState>

embed_viewports: bool

loaders: Arc<Loaders>

Implementations

impl ContextImpl

Repaint-logic

fn begin_pass_repaint_logic(&mut self, viewport_id: ViewportId)

This is where we update the repaint logic.

fn request_repaint(&mut self, viewport_id: ViewportId, cause: RepaintCause)

fn request_repaint_after( &mut self, delay: Duration, viewport_id: ViewportId, cause: RepaintCause, )

fn requested_immediate_repaint_prev_pass( &self, viewport_id: &ViewportId, ) -> bool

fn has_requested_repaint(&self, viewport_id: &ViewportId) -> bool

impl ContextImpl

fn begin_pass(&mut self, new_raw_input: RawInput)

fn update_fonts_mut(&mut self)

Load fonts unless already loaded.

fn pixels_per_point(&mut self) -> f32

pub(crate) fn viewport_id(&self) -> ViewportId

Return the ViewportId of the current viewport.

For the root viewport this will return ViewportId::ROOT.

pub(crate) fn parent_viewport_id(&self) -> ViewportId

Return the ViewportId of his parent.

For the root viewport this will return ViewportId::ROOT.

fn all_viewport_ids(&self) -> ViewportIdSet

pub(crate) fn viewport(&mut self) -> &mut ViewportState

The current active viewport

fn viewport_for(&mut self, viewport_id: ViewportId) -> &mut ViewportState

impl ContextImpl

fn end_pass(&mut self) -> FullOutput

Trait Implementations

impl Default for ContextImpl

fn default() -> ContextImpl

Returns the “default value” for a type.