99 lines
2.3 KiB
Rust
99 lines
2.3 KiB
Rust
use std::ops::Range;
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use crate::{
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geometry::{rect::RectF, vector::Vector2F},
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json, AnyElement, Element, LayoutContext, SceneBuilder, SizeConstraint, View, ViewContext,
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};
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use serde_json::json;
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pub struct Expanded<V: View> {
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child: AnyElement<V>,
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full_width: bool,
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full_height: bool,
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}
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impl<V: View> Expanded<V> {
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pub fn new(child: impl Element<V>) -> Self {
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Self {
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child: child.into_any(),
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full_width: true,
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full_height: true,
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}
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}
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pub fn full_width(mut self) -> Self {
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self.full_width = true;
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self.full_height = false;
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self
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}
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pub fn full_height(mut self) -> Self {
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self.full_width = false;
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self.full_height = true;
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self
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}
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}
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impl<V: View> Element<V> for Expanded<V> {
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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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mut constraint: SizeConstraint,
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view: &mut V,
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cx: &mut LayoutContext<V>,
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) -> (Vector2F, Self::LayoutState) {
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if self.full_width {
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constraint.min.set_x(constraint.max.x());
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}
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if self.full_height {
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constraint.min.set_y(constraint.max.y());
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}
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let size = self.child.layout(constraint, view, cx);
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(size, ())
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}
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fn paint(
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&mut self,
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scene: &mut SceneBuilder,
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bounds: RectF,
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visible_bounds: RectF,
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_: &mut Self::LayoutState,
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view: &mut V,
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cx: &mut ViewContext<V>,
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) -> Self::PaintState {
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self.child
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.paint(scene, bounds.origin(), visible_bounds, view, cx);
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}
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fn rect_for_text_range(
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&self,
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range_utf16: Range<usize>,
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_: RectF,
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_: RectF,
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_: &Self::LayoutState,
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_: &Self::PaintState,
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view: &V,
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cx: &ViewContext<V>,
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) -> Option<RectF> {
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self.child.rect_for_text_range(range_utf16, view, cx)
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}
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fn debug(
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&self,
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_: RectF,
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_: &Self::LayoutState,
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_: &Self::PaintState,
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view: &V,
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cx: &ViewContext<V>,
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) -> json::Value {
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json!({
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"type": "Expanded",
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"full_width": self.full_width,
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"full_height": self.full_height,
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"child": self.child.debug(view, cx)
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})
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}
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}
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