Add new tab.

src/app.rs

@@ -37,14 +37,8 @@ struct TabViewer {
     show_settings_toggle: Option<bool>,
 }
 
-impl egui_dock::TabViewer for TabViewer {
-    type Tab = String;
-
-    fn title(&mut self, tab: &mut Self::Tab) -> egui::WidgetText {
-        (&*tab).into()
-    }
-
-    fn ui(&mut self, ui: &mut egui::Ui, tab: &mut Self::Tab) {
+impl TabViewer {
+    fn single_tab(&mut self, ui: &mut egui::Ui) {
         egui::Frame::default().inner_margin(5).show(ui, |ui| {
             let settings = CollapsingHeader::new("Settings")
             .open(self.show_settings_toggle)
@@ -110,6 +104,28 @@ impl egui_dock::TabViewer for TabViewer {
             );
         });
     }
+
+    fn multi_tab(&mut self, ui: &mut egui::Ui) {
+        ui.heading("Bode plots!");
+    }
+}
+
+impl egui_dock::TabViewer for TabViewer {
+    type Tab = String;
+
+    fn title(&mut self, tab: &mut Self::Tab) -> egui::WidgetText {
+        (&*tab).into()
+    }
+
+    fn ui(&mut self, ui: &mut egui::Ui, tab: &mut Self::Tab) {
+        match tab.as_str() {
+            "Single" => self.single_tab(ui),
+            "Multi" => self.multi_tab(ui),
+            _ => {
+                let _ = ui.label("Unknown tab");
+            }
+        }
+    }
 }
 
 impl App {
@@ -136,7 +152,7 @@ impl App {
 
         // Step 3: Construct App
         let app = App {
-            tree: DockState::new(vec!["Single".to_string()]),
+            tree: DockState::new(vec!["Single".to_string(), "Multi".to_string()]),
             tab_viewer,
             run_impedancemeter_tx,
             magnitude,