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cd45d18615
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82 lines
2.2 KiB
Rust
82 lines
2.2 KiB
Rust
use std::collections::BTreeMap;
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use egui::{Context, Id, Pos2, Vec2b};
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use crate::{PlotBounds, PlotTransform};
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/// Information about the plot that has to persist between frames.
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#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
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#[derive(Clone)]
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pub struct PlotMemory {
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/// Indicates if the plot uses automatic bounds.
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///
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/// This is set to `false` whenever the user modifies
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/// the bounds, for example by moving or zooming.
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pub auto_bounds: Vec2b,
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/// Display string of the hovered legend item if any.
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pub hovered_legend_item: Option<String>,
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/// Which items _not_ to show?
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pub hidden_items: ahash::HashSet<String>,
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/// The transform from last frame.
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pub(crate) transform: PlotTransform,
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/// Allows to remember the first click position when performing a boxed zoom
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pub(crate) last_click_pos_for_zoom: Option<Pos2>,
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/// The thickness of each of the axes the previous frame.
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///
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/// This is used in the next frame to make the axes thicker
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/// in order to fit the labels, if necessary.
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pub(crate) x_axis_thickness: BTreeMap<usize, f32>,
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pub(crate) y_axis_thickness: BTreeMap<usize, f32>,
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}
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impl PlotMemory {
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#[inline]
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pub fn transform(&self) -> PlotTransform {
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self.transform
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}
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#[inline]
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pub fn set_transform(&mut self, t: PlotTransform) {
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self.transform = t;
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}
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/// Plot-space bounds.
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#[inline]
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pub fn bounds(&self) -> &PlotBounds {
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self.transform.bounds()
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}
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/// Plot-space bounds.
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#[inline]
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pub fn set_bounds(&mut self, bounds: PlotBounds) {
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self.transform.set_bounds(bounds);
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}
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}
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#[cfg(feature = "serde")]
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impl PlotMemory {
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pub fn load(ctx: &Context, id: Id) -> Option<Self> {
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ctx.data_mut(|d| d.get_persisted(id))
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}
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pub fn store(self, ctx: &Context, id: Id) {
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ctx.data_mut(|d| d.insert_persisted(id, self));
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}
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}
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#[cfg(not(feature = "serde"))]
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impl PlotMemory {
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pub fn load(ctx: &Context, id: Id) -> Option<Self> {
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ctx.data_mut(|d| d.get_temp(id))
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}
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pub fn store(self, ctx: &Context, id: Id) {
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ctx.data_mut(|d| d.insert_temp(id, self));
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}
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}
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