53 lines
1.7 KiB
Rust
53 lines
1.7 KiB
Rust
use std::collections::HashMap;
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use crate::{collapsing_header, resize, scroll_area, window, *};
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#[derive(Clone, Debug, 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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pub(crate) active_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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windows: HashMap<Id, window::State>,
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/// Top is last
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pub window_order: Vec<Id>,
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}
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impl Memory {
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pub fn get_window(&mut self, id: Id) -> Option<window::State> {
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self.windows.get(&id).cloned()
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}
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pub fn set_window_state(&mut self, id: Id, state: window::State) {
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let did_insert = self.windows.insert(id, state).is_none();
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if did_insert {
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self.window_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 window_id in self.window_order.iter().rev() {
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if let Some(state) = self.windows.get(window_id) {
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if state.outer_rect.contains(pos) {
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return Layer::Window(*window_id);
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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_window_to_top(&mut self, id: Id) {
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if self.window_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.window_order.iter().position(|x| *x == id) {
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self.window_order.remove(index);
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}
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self.window_order.push(id);
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}
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}
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