allow to plot only every n-th point (max points is 5000, if dataset is larger, it will reduce it by showing only every 2nd point. if it is larger than 10000 only every 3rd point etc...)

Author: hacknus

src/gui.rs

@@ -123,6 +123,7 @@ pub struct MyApp {
     device_idx: usize,
     serial_devices: SerialDevices,
     plotting_range: usize,
+    max_points: usize,
     plot_serial_display_ratio: f32,
     picked_path: PathBuf,
     plot_location: Option<egui::Rect>,
@@ -237,6 +238,7 @@ impl MyApp {
             send_tx,
             gui_cmd_tx,
             plotting_range: usize::MAX,
+            max_points: 5000,
             plot_serial_display_ratio: 0.45,
             command: "".to_string(),
             show_sent_cmds: true,
@@ -390,14 +392,23 @@ impl MyApp {
                                     .y_grid_spacer(log_grid_spacer(10))
                                     .x_axis_formatter(t_fmt);
 
+                                let n = (self.data.prints.len() / self.max_points).max(1);
+
                                 let plot_inner = signal_plot.show(ui, |signal_plot_ui| {
                                     for (i, (_label, graph)) in self.data.plots.iter().enumerate() {
                                         // this check needs to be here for when we change devices (not very elegant)
                                         if i < self.labels.len() {
                                             signal_plot_ui.line(
                                                 Line::new(
                                                     self.labels[i].to_string(),
-                                                    PlotPoints::Owned(graph[window..].to_vec()),
+                                                    PlotPoints::Owned(
+                                                        graph
+                                                            .iter()
+                                                            .skip(window)
+                                                            .step_by(n)
+                                                            .cloned()
+                                                            .collect(),
+                                                    ),
                                                 )
                                                 .color(self.colors[i]),
                                             );
@@ -1017,6 +1028,27 @@ impl MyApp {
                     }
                 });
                 ui.end_row();
+
+
+                ui.label("Max Points [#]: ");
+
+                ui.horizontal(|ui| {
+                    ui.add(
+                        egui::DragValue::new(&mut self.max_points).custom_formatter(window_fmt),
+                    )
+                        .on_hover_text(
+                            "Select the maximum number of points to be displayed in the plot. The actual displayed points will be less than this value (only every 2nd, 3rd, etc. point will be displayed).",
+                        );
+                    if ui
+                        .button("Full Dataset")
+                        .on_hover_text("Show the full dataset.")
+                        .clicked()
+                    {
+                        self.max_points = usize::MAX;
+                    }
+                });
+                ui.end_row();
+
                 ui.label("Number of plots [#]: ");
 
                 ui.horizontal(|ui| {