80 lines
2.7 KiB
Rust
80 lines
2.7 KiB
Rust
use std::collections::{HashMap, HashSet};
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use crate::{
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containers::{collapsing_header, floating, resize, scroll_area},
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Id, Layer, Pos2, Rect,
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};
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#[derive(Clone, Debug, Default, serde_derive::Deserialize, serde_derive::Serialize)]
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#[serde(default)]
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pub struct Memory {
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/// The widget being interacted with (e.g. dragged, in case of a slider).
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#[serde(skip)]
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pub(crate) active_id: Option<Id>,
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/// The widget with keyboard focus (i.e. a text input field).
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#[serde(skip)]
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pub(crate) kb_focus_id: Option<Id>,
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// states of various types of widgets
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pub(crate) collapsing_headers: HashMap<Id, collapsing_header::State>,
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pub(crate) scroll_areas: HashMap<Id, scroll_area::State>,
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pub(crate) resize: HashMap<Id, resize::State>,
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floating: HashMap<Id, floating::State>,
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/// Top is last
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floating_order: Vec<Id>,
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floating_visible_last_frame: HashSet<Id>,
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floating_visible_current_frame: HashSet<Id>,
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}
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impl Memory {
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pub(crate) fn get_floating(&mut self, id: Id) -> Option<floating::State> {
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self.floating.get(&id).cloned()
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}
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pub(crate) fn floating_order(&self) -> &[Id] {
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&self.floating_order
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}
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pub(crate) fn set_floating_state(&mut self, id: Id, state: floating::State) {
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self.floating_visible_current_frame.insert(id);
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let did_insert = self.floating.insert(id, state).is_none();
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if did_insert {
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self.floating_order.push(id);
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}
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}
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/// TODO: call once at the start of the frame for the current mouse pos
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pub fn layer_at(&self, pos: Pos2) -> Layer {
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for floating_id in self.floating_order.iter().rev() {
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if self.floating_visible_last_frame.contains(floating_id)
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|| self.floating_visible_current_frame.contains(floating_id)
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{
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if let Some(state) = self.floating.get(floating_id) {
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let rect = Rect::from_min_size(state.pos, state.size);
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if rect.contains(pos) {
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return Layer::Window(*floating_id);
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}
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}
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}
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}
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Layer::Background
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}
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pub fn move_floating_to_top(&mut self, id: Id) {
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if self.floating_order.last() == Some(&id) {
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return; // common case early-out
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}
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if let Some(index) = self.floating_order.iter().position(|x| *x == id) {
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self.floating_order.remove(index);
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}
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self.floating_order.push(id);
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self.floating_visible_current_frame.insert(id);
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}
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pub(crate) fn begin_frame(&mut self) {
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self.floating_visible_last_frame = std::mem::take(&mut self.floating_visible_current_frame);
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}
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}
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