port to egui (WIP)

2022-02-23 15:10:08 -05:00
parent eaf858b097
commit 59e4793a1b
15 changed files with 383 additions and 1072 deletions
--- a/src/egui_app.rs
+++ b/src/egui_app.rs
@@ -0,0 +1,94 @@
+use eframe::{egui, epi};
+use egui::{plot::{HLine, Line, Plot, Value, Values, Text}, Pos2};
+use crate::chart_manager::ChartManager;
+use meval::Expr;
+use crate::misc::{add_asterisks, Cache, Function};
+use egui::{Color32, ColorImage, Ui};
+use emath::Rect;
+use epaint::{Rounding, RectShape, Stroke};
+use egui::widgets::plot::{Bar, BarChart};
+
+pub struct MathApp {
+    func_str: String,
+    min_x: f64,
+    max_x: f64,
+    num_interval: usize,
+    resolution: usize,
+    chart_manager: ChartManager,
+}
+
+impl Default for MathApp {
+    fn default() -> Self {
+        Self {
+            func_str: "x^2".to_string(),
+            min_x: -10.0,
+            max_x: 10.0,
+            num_interval: 100,
+            resolution: 10000,
+            chart_manager: ChartManager::new("x^2".to_string(), -10.0, 10.0, 100, 10000)
+        }
+    }
+}
+
+impl epi::App for MathApp {
+    fn name(&self) -> &str {
+        "eframe template"
+    }
+
+    /// Called once before the first frame.
+    fn setup(
+        &mut self,
+        _ctx: &egui::Context,
+        _frame: &epi::Frame,
+        _storage: Option<&dyn epi::Storage>,
+    ) { }
+
+
+    /// Called each time the UI needs repainting, which may be many times per second.
+    /// Put your widgets into a `SidePanel`, `TopPanel`, `CentralPanel`, `Window` or `Area`.
+    fn update(&mut self, ctx: &egui::Context, frame: &epi::Frame) {
+        let Self {
+            func_str,
+            min_x,
+            max_x,
+            num_interval,
+            resolution,
+            chart_manager
+        } = self;
+
+        egui::SidePanel::left("side_panel").show(ctx, |ui| {
+            ui.heading("Side Panel");
+
+            ui.horizontal(|ui| {
+                ui.label("Function: ");
+                ui.text_edit_singleline(func_str);
+            });
+
+            ui.add(egui::Slider::new(min_x, -1000.0..=1000.0).text("Min X"));
+            ui.add(egui::Slider::new(max_x, *min_x..=1000.0).text("Max X"));
+
+            ui.add(egui::Slider::new(num_interval, 0..=usize::MAX).text("Interval"));
+        });
+
+        egui::CentralPanel::default().show(ctx, |ui| {
+            let (filtered_data, rect_data, area) = chart_manager.update(self.func_str.clone(), self.min_x, self.max_x, self.num_interval, self.resolution);
+
+            let filtered_data_values = filtered_data.iter().map(|(x, y)| Value::new(*x, *y)).collect();
+
+            let curve = Line::new(Values::from_values(filtered_data_values)).color(Color32::RED);
+            let bars = rect_data.iter().map(|(_, x2, y)| Bar::new(*x2, *y)).collect();
+            let barchart = BarChart::new(bars).color(Color32::BLUE);
+            
+            // ui.label("Graph:");
+            ui.label(format!("Area: {:.10}", area));
+            Plot::new("plot")
+                .view_aspect(1.0)
+                .include_y(0)
+                .show(ui, |plot_ui| {
+                    plot_ui.line(curve);
+                    plot_ui.bar_chart(barchart);
+            });
+        });
+
+    }
+}