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|
use egui::Sense;
use crate::eguictx::EguiCtx;
use crate::ntree::{NTree, NTreeNode};
use crate::solar_system::body::{BodyId, OrbitalBody};
use crate::solar_system::{SolarSystem, SystemId};
#[derive(Default, Clone)]
pub struct BodiesWindowState
{
last_system: Option<SystemId>,
system_heirarchy: NTree<SystemId>,
selected_body: Option<BodyId>
}
#[derive(Default, Clone)]
pub struct BodiesWindowAction
{
pub focus_body: Option<BodyId>
}
impl BodiesWindowState
{
fn build_system_heirarchy_rec(
bodies: &[OrbitalBody],
node: &mut NTreeNode<BodyId>)
{
for body in bodies {
let orbit = body.get_orbit();
match orbit {
Some(orbit) => {
if orbit.parent() != *node.value() {
continue;
}
},
None => {
continue;
}
}
let mut subnode = NTreeNode::new(body.id());
BodiesWindowState::build_system_heirarchy_rec(bodies, &mut subnode);
node.insert_node(subnode);
}
}
fn rebuild_system_heirarchy(
&mut self,
star_system: &SolarSystem)
{
let mut root_node = NTreeNode::<BodyId>::new(0);
let bodies = star_system.bodies();
BodiesWindowState::build_system_heirarchy_rec(bodies, &mut root_node);
self.system_heirarchy.set_root(root_node);
}
pub fn render(
&mut self,
current_system: &SolarSystem,
eguictx: &EguiCtx)
-> BodiesWindowAction
{
match self.last_system {
Some(last_system) => {
if last_system != current_system.id() {
self.rebuild_system_heirarchy(current_system);
}
},
None => {
self.rebuild_system_heirarchy(current_system);
}
}
self.last_system = Some(current_system.id());
let mut action = BodiesWindowAction::default();
egui::Window::new("Bodies")
.resizable(true)
.show(eguictx.context(), |ui| {
ui.horizontal(|ui| {
self.paint_bodies_list(current_system, ui);
self.paint_body_info_panel(&mut action, current_system, ui);
});
});
action
}
fn paint_bodies_node_rec(
&self,
star_system: &SolarSystem,
node: &NTreeNode<BodyId>,
ui: &mut egui::Ui)
-> Option<BodyId>
{
let body = star_system.body(*node.value());
let children = node.children();
let selected = self.selected_body.is_some_and(|v| { v == *node.value() });
let mut new_selected = None;
if children.is_empty() {
if ui.selectable_label(selected, body.name()).clicked() {
new_selected = Some(*node.value());
}
}else{
egui::collapsing_header::CollapsingState::load_with_default_open(
ui.ctx(),
ui.make_persistent_id(format!("bodies_window_body_{}", body.id())),
true)
.show_header(ui, |ui| {
if ui.selectable_label(selected, body.name()).clicked() {
new_selected = Some(*node.value());
}
})
.body(|ui| {
for child in children {
let child_selected = self.paint_bodies_node_rec(star_system, child, ui);
if child_selected.is_some() {
new_selected = child_selected;
}
}
});
};
new_selected
}
fn paint_bodies_list(
&mut self,
star_system: &SolarSystem,
ui: &mut egui::Ui)
-> Option<egui::Response>
{
let resp = egui::ScrollArea::vertical()
.auto_shrink(true)
.min_scrolled_height(200.0)
.show(ui, |ui| {
ui.vertical(|ui| {
let root = self.system_heirarchy.root();
let new_sel = self.paint_bodies_node_rec(star_system, root.as_ref().unwrap(), ui);
if new_sel.is_some() {
self.selected_body = new_sel;
}
}).response
});
Some(resp.inner)
}
fn paint_body_info_panel(
&mut self,
action: &mut BodiesWindowAction,
star_system: &SolarSystem,
ui: &mut egui::Ui)
{
let selected_body = match self.selected_body {
Some(id) => { star_system.body(id) },
None => { return; }
};
ui.separator();
egui::Frame::canvas(ui.style())
.show(ui, |ui| {
ui.set_width(200.0);
ui.vertical_centered(|ui| {
ui.label(
egui::RichText::new(selected_body.name())
.heading());
});
ui.horizontal(|ui| {
let focus_resp = ui.button("Focus");
if focus_resp.clicked() {
action.focus_body = Some(selected_body.id());
}
});
});
}
}
|
