78 lines
1.6 KiB
Rust
78 lines
1.6 KiB
Rust
use crate::{
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geometry::{
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rect::RectF,
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vector::{vec2f, Vector2F},
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},
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json::{json, ToJson},
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DebugContext,
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};
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use crate::{
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AfterLayoutContext, Element, Event, EventContext, LayoutContext, PaintContext, SizeConstraint,
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};
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pub struct Empty;
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impl Empty {
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pub fn new() -> Self {
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Self
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}
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}
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impl Element for Empty {
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type LayoutState = ();
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type PaintState = ();
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fn layout(
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&mut self,
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constraint: SizeConstraint,
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_: &mut LayoutContext,
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) -> (Vector2F, Self::LayoutState) {
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let x = if constraint.max.x().is_finite() {
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constraint.max.x()
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} else {
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constraint.min.x()
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};
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let y = if constraint.max.y().is_finite() {
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constraint.max.y()
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} else {
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constraint.min.y()
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};
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(vec2f(x, y), ())
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}
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fn after_layout(&mut self, _: Vector2F, _: &mut Self::LayoutState, _: &mut AfterLayoutContext) {
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}
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fn paint(
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&mut self,
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_: RectF,
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_: &mut Self::LayoutState,
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_: &mut PaintContext,
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) -> Self::PaintState {
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}
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fn dispatch_event(
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&mut self,
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_: &Event,
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_: RectF,
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_: &mut Self::LayoutState,
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_: &mut Self::PaintState,
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_: &mut EventContext,
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) -> bool {
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false
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}
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fn debug(
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&self,
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bounds: RectF,
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_: &Self::LayoutState,
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_: &Self::PaintState,
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_: &DebugContext,
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) -> serde_json::Value {
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json!({
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"type": "Empty",
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"bounds": bounds.to_json(),
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})
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}
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}
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