egui-probe 0.11.0

Trait and derive macro for exposing value editing in egui
Documentation 
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use egui::{Pos2, Rect, Vec2};

use crate::EguiProbe;

impl EguiProbe for Vec2 {
    fn probe(&mut self, ui: &mut egui::Ui, _style: &crate::Style) -> egui::Response {
        let mut changed = false;

        let mut r = ui
            .horizontal(|ui| {
                changed |= ui.add(egui::DragValue::new(&mut self.x)).changed();
                changed |= ui.add(egui::DragValue::new(&mut self.y)).changed();
            })
            .response;

        if changed {
            r.mark_changed();
        }

        r
    }
}

impl EguiProbe for Pos2 {
    fn probe(&mut self, ui: &mut egui::Ui, _style: &crate::Style) -> egui::Response {
        let mut changed = false;

        let mut r = ui
            .horizontal(|ui| {
                changed |= ui.add(egui::DragValue::new(&mut self.x)).changed();
                changed |= ui.add(egui::DragValue::new(&mut self.y)).changed();
            })
            .response;

        if changed {
            r.mark_changed();
        }

        r
    }
}

impl EguiProbe for Rect {
    fn probe(&mut self, ui: &mut egui::Ui, style: &crate::Style) -> egui::Response {
        let mut changed = false;

        let mut r = ui
            .horizontal(|ui| {
                let top = ui.label("top");
                changed |= self.min.y.probe(ui, style).labelled_by(top.id).changed();
                let left = ui.label("left");
                changed |= self.min.x.probe(ui, style).labelled_by(left.id).changed();
                let bottom = ui.label("bottom");
                changed |= self.max.y.probe(ui, style).labelled_by(bottom.id).changed();
                let right = ui.label("right");
                changed |= self.max.x.probe(ui, style).labelled_by(right.id).changed();
            })
            .response;

        if changed {
            r.mark_changed();
        }

        r
    }
}