some experiments

examples/egui-graph-viz/Cargo.toml

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+[package]
+name = "egui-graph-viz"
+version = "0.1.0"
+license = "MIT"
+edition = "2021"
+
+[dependencies]
+egui = "0.27"
+eframe = "0.27"
+petgraph = "0.6"
+egui_graphs = "0.20.0"

examples/egui-graph-viz/README.md

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+# Interactive
+Modification of the [basic example](https://github.com/blitzarx1/egui_graph/tree/master/examples/basic) which shows how easy it is to enable interactivity.
+
+Try to drag around and select some nodes.
+
+## run
+```bash
+cargo run --release -p interactive
+```

examples/egui-graph-viz/src/main.rs

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+use eframe::{run_native, App, CreationContext};
+use egui::Context;
+use egui_graphs::{
+    DefaultEdgeShape, DefaultNodeShape, Graph, GraphView, SettingsInteraction, SettingsStyle,
+};
+use petgraph::stable_graph::StableGraph;
+
+pub struct InteractiveApp {
+    g: Graph<(), ()>,
+}
+
+impl InteractiveApp {
+    fn new(_: &CreationContext<'_>) -> Self {
+        let g = generate_graph();
+        Self { g }
+    }
+}
+
+impl App for InteractiveApp {
+    fn update(&mut self, ctx: &Context, _: &mut eframe::Frame) {
+        egui::CentralPanel::default().show(ctx, |ui| {
+            let interaction_settings = &SettingsInteraction::new()
+                .with_dragging_enabled(true)
+                .with_node_clicking_enabled(true)
+                .with_node_selection_enabled(true)
+                .with_node_selection_multi_enabled(true)
+                .with_edge_clicking_enabled(true)
+                .with_edge_selection_enabled(true)
+                .with_edge_selection_multi_enabled(true);
+            let style_settings = &SettingsStyle::new().with_labels_always(true);
+            ui.add(
+                &mut GraphView::<_, _, _, _, DefaultNodeShape, DefaultEdgeShape>::new(&mut self.g)
+                    .with_styles(style_settings)
+                    .with_interactions(interaction_settings),
+            );
+        });
+    }
+}
+
+fn generate_graph() -> Graph<(), ()> {
+    let mut g = StableGraph::new();
+
+    let a = g.add_node(());
+    let b = g.add_node(());
+    let c = g.add_node(());
+
+    g.add_edge(a, a, ());
+    g.add_edge(a, b, ());
+    g.add_edge(a, b, ());
+    g.add_edge(b, c, ());
+    g.add_edge(c, a, ());
+
+    Graph::from(&g)
+}
+
+fn main() {
+    let native_options = eframe::NativeOptions::default();
+    run_native(
+        "egui_graphs_interactive_demo",
+        native_options,
+        Box::new(|cc| Box::new(InteractiveApp::new(cc))),
+    )
+    .unwrap();
+}