use crate::{ geometry::{rect::RectF, vector::Vector2F}, json::{self, json, ToJson}, DebugContext, Element, ElementBox, Event, EventContext, LayoutContext, PaintContext, SizeConstraint,}; pub struct Stack { children: Vec<ElementBox>,} impl Stack { pub fn new() -> Self { Stack { children: Vec::new(), } }} impl Element for Stack { type LayoutState = (); type PaintState = (); fn layout( &mut self, constraint: SizeConstraint, cx: &mut LayoutContext, ) -> (Vector2F, Self::LayoutState) { let mut size = constraint.min; for child in &mut self.children { size = size.max(child.layout(constraint, cx)); } (size, ()) } fn paint( &mut self, bounds: RectF, visible_bounds: RectF, _: &mut Self::LayoutState, cx: &mut PaintContext, ) -> Self::PaintState { for child in &mut self.children { cx.scene.push_layer(None); child.paint(bounds.origin(), visible_bounds, cx); cx.scene.pop_layer(); } } fn dispatch_event( &mut self, event: &Event, _: RectF, _: &mut Self::LayoutState, _: &mut Self::PaintState, cx: &mut EventContext, ) -> bool { for child in self.children.iter_mut().rev() { if child.dispatch_event(event, cx) { return true; } } false } fn debug( &self, bounds: RectF, _: &Self::LayoutState, _: &Self::PaintState, cx: &DebugContext, ) -> json::Value { json!({ "type": "Stack", "bounds": bounds.to_json(), "children": self.children.iter().map(|child| child.debug(cx)).collect::<Vec<json::Value>>() }) }} impl Extend<ElementBox> for Stack { fn extend<T: IntoIterator<Item = ElementBox>>(&mut self, children: T) { self.children.extend(children) }}
use crate::{
geometry::{rect::RectF, vector::Vector2F},
json::{self, json, ToJson},
DebugContext, Element, ElementBox, Event, EventContext, LayoutContext, PaintContext,
SizeConstraint,
};
pub struct Stack {
children: Vec<ElementBox>,
}
impl Stack {
pub fn new() -> Self {
Stack {
children: Vec::new(),
}
}
}
impl Element for Stack {
type LayoutState = ();
type PaintState = ();
fn layout(
&mut self,
constraint: SizeConstraint,
cx: &mut LayoutContext,
) -> (Vector2F, Self::LayoutState) {
let mut size = constraint.min;
for child in &mut self.children {
size = size.max(child.layout(constraint, cx));
}
(size, ())
}
fn paint(
&mut self,
bounds: RectF,
visible_bounds: RectF,
_: &mut Self::LayoutState,
cx: &mut PaintContext,
) -> Self::PaintState {
for child in &mut self.children {
cx.scene.push_layer(None);
child.paint(bounds.origin(), visible_bounds, cx);
cx.scene.pop_layer();
}
}
fn dispatch_event(
&mut self,
event: &Event,
_: RectF,
_: &mut Self::LayoutState,
_: &mut Self::PaintState,
cx: &mut EventContext,
) -> bool {
for child in self.children.iter_mut().rev() {
if child.dispatch_event(event, cx) {
return true;
}
}
false
}
fn debug(
&self,
bounds: RectF,
_: &Self::LayoutState,
_: &Self::PaintState,
cx: &DebugContext,
) -> json::Value {
json!({
"type": "Stack",
"bounds": bounds.to_json(),
"children": self.children.iter().map(|child| child.debug(cx)).collect::<Vec<json::Value>>()
})
}
}
impl Extend<ElementBox> for Stack {
fn extend<T: IntoIterator<Item = ElementBox>>(&mut self, children: T) {
self.children.extend(children)
}
}