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use std::marker::PhantomData;
use bevy::{
ecs::query::{FilterFetch, WorldQuery},
prelude::*,
};
use bevy_egui::{egui, EguiContext, EguiPlugin};
use super::{WorldInspectorParams, WorldUIContext};
use crate::InspectableRegistry;
pub struct WorldInspectorPlugin<F = ()>(PhantomData<fn() -> F>);
impl Default for WorldInspectorPlugin {
fn default() -> Self {
WorldInspectorPlugin::new()
}
}
impl WorldInspectorPlugin {
pub fn new() -> Self {
WorldInspectorPlugin(PhantomData)
}
pub fn filter<F>(self) -> WorldInspectorPlugin<F> {
WorldInspectorPlugin(PhantomData)
}
}
impl<F> Plugin for WorldInspectorPlugin<F>
where
F: WorldQuery + 'static,
F::Fetch: FilterFetch,
{
fn build(&self, app: &mut AppBuilder) {
if !app.world_mut().contains_resource::<EguiContext>() {
app.add_plugin(EguiPlugin);
}
let world = app.world_mut();
world.get_resource_or_insert_with(WorldInspectorParams::default);
world.get_resource_or_insert_with(InspectableRegistry::default);
app.add_system(world_inspector_ui::<F>.exclusive_system());
}
}
fn world_inspector_ui<F>(world: &mut World)
where
F: WorldQuery,
F::Fetch: FilterFetch,
{
let world_ptr = world as *mut _;
let params = world.get_resource::<WorldInspectorParams>().unwrap();
if !params.enabled {
return;
}
let egui_context = world.get_resource::<EguiContext>().expect("EguiContext");
let ctx = match egui_context.try_ctx_for_window(params.window) {
Some(ctx) => ctx,
None => return,
};
let mut is_open = true;
egui::Window::new("World")
.open(&mut is_open)
.scroll(true)
.show(ctx, |ui| {
crate::plugin::default_settings(ui);
let world: &mut World = unsafe { &mut *world_ptr };
let mut ui_context = WorldUIContext::new(world, Some(egui_context.ctx()));
ui_context.world_ui::<F>(ui, ¶ms);
});
if !is_open {
world
.get_resource_mut::<WorldInspectorParams>()
.unwrap()
.enabled = false;
}
}